512Treating Concrete

ITEM 512 TREATING CONCRETE

512.01Description. This work consists of sealing and treating concrete surfaces, sealing cracks

in concrete, and applying waterproofing to structures.

512.02Materials. Furnish materials conforming to:

Asphalt cement............ 702.01 (PG 64 - 22) Asphalt primer for702.02 (RC-70 or RC-250), waterproofing ............................... 702.05 HMWM Resin .................................. 705.15 Epoxy-Urethane Sealer ................ 705.23.A Non-epoxy Sealer......................... 705.23.B Soluble Reactive Silicate (SRS)....... 705.24 Gravity Fed Resin ............................ 705.25 Epoxy injection Materials ................ 705.26 Sand..... 703 with the following exceptions: Maximum moisture content of 0.5 of the percent of absorption when treated according to California Test 226. Gradation: Sieve Size Total Percent Passing No. 4 (4.75 mm) 100 No. 8 (2.36 mm) 90 to 100 No. 20 (850 µm) 5 to 15 No. 50 (300 µm) 0 to 5 ................................ 702.04 (MS-2, SS-1) Asphalt for waterproofing ................ 702.06 Hot applied joint sealer .................... 705.04 Type 3 membrane primer ................. 705.04 Waterproofing fabric ........................ 711.24 ...................................................... 711.25 ...................................................... 711.29

512.03Sealing of Concrete Surfaces. This work consists of applying an approved sealer on

existing and new concrete surface areas after the concrete is cured and repairs completed and cured. Apply the sealer to locations described in the plans. Apply the sealer listed in the pay item description. Choose a type of sealer if no sealer is listed in the pay item description.

equipment, tanks, hoses, brooms, rollers, coaters, squeegees, etc., that are clean, free of foreign matter, oil residue and water.

Engineer with the manufacturer’s application instructions. Do not mix or apply the sealer until the manufacturer’s written recommendations are supplied to the Engineer. Mix and maintain materials at a uniform consistency during application. 348

recommended by the manufacturer. Deliver unopened drums or containers of the sealer or sealer components to the job site with the manufacturer's numbered seal intact.

manufacturer’s written requirements for application equipment, mixing equipment, mixing procedures, mixing time, storage requirements, recoat times and temperatures, and SDS sheets.

curing compounds, efflorescence, laitance, coatings and other foreign materials. Visually inspect all surfaces before applying sealer. Remove all structurally unsound surfaces and weak sections. Perform all concrete patching prior to surface profiling. Perform concrete patching on areas identified by the Engineer according to 519. Cure repaired areas for at least seven (7) days. Air dry all concrete surfaces for at least ten (10) days after completion of required curing. For accelerated cure of precast concrete, obtain the required 28 day strength and air dry the surfaces at least ten (10) days after completing accelerated cure.

Remove dust, dirt, oil, wax, curing compounds, efflorescence, laitance, coatings and other foreign materials from surfaces to be sealed. Ensure that all wastes generated by the surface preparation operation are managed in accordance with 107.19. If the concrete surface had curing compound applied, acid test the surface after blasting to see if the curing compound was removed. Perform the acid test for every 500 square feet (47 square meters). Use a 30%, by weight, solution of hydrochloric acid. Apply 4 to 5 drops to the concrete surface. If foaming/fizzing occurs the curing compound is removed. Rinse the tested location with an ammonia solution to neutralize the concrete area tested (1 cup ammonia to 5 gallons water). (NOTE: Muriatic acid and ammonia can be bought in a hardware store. Muriatic acid is used to clean masonry. Only dilute by pouring the acid into the water. DO NOT pour the water into the acid.) When surfaces show intermittent or no foaming, use chemicals or other cleaning compounds to remove the curing compounds. Only use products approved by the sealer manufacturer. Furnish the Engineer documentation of the sealer manufacturer’s approval and method to test if materials are removed.

Remove dust, dirt, oil, wax, curing compounds, efflorescence, laitance, coatings and other foreign materials from surfaces to be sealed. Ensure that all wastes generated by the surface preparation operation are managed in accordance with 107.19. If the concrete surface had curing compound applied, acid test the surface after blasting to see if the curing compound was removed. Perform the acid test for every 500 square feet (47 square meters). Use a 30%, by weight, solution of hydrochloric acid. Apply 4 to 5 drops to the concrete surface. If foaming/fizzing occurs the curing compound is removed. Rinse the tested location with an ammonia solution to neutralize the concrete area tested (1 cup ammonia to 5 gallons water). 349 (NOTE: Muriatic acid and ammonia can be bought in a hardware store. Muriatic acid is used to clean masonry. Only dilute by pouring the acid into the water. DO NOT pour the water into the acid.) When surfaces show intermittent or no foaming, use chemicals or other cleaning compounds to remove the curing compounds. Only use products approved by the sealer manufacturer. Furnish the Engineer documentation of the sealer manufacturer’s approval and method to test if materials are removed. After concrete has cured and forms are removed, use one or both of the following methods to produce a surface profile that feels and looks like 100 grit sandpaper or coarser. Provide the Engineer sandpaper for comparison. Perform the ASTM D7682 -12, Method B, Standard Test Method for Replication and Measurement of Concrete Surface Profile Using Replica Putty to obtain a replica coupon of the prepared concrete surface on a flat, test section, on the first day of production, and as requested by the Engineer. With a micrometer, measure the surface profile obtained on the coupon, and provide the coupon to the Engineer

from the surface and opened pores, or

Install suitable traps, filters, drip pans and other separation devices in the cleaning equipment so oil and other foreign material are not deposited on the surface. Fill all cavities produced by form ties and other single defects or defected areas with a prequalified trowelable mortar in accordance with Supplemental Specification 843.02 and 843.06. Provide a broom/brush finish to all trowelable mortar patches. Cure the trowelable mortar according to Supplemental Specification 843.07. A defect is an imperfection in the concrete measuring at least 3/4” (19mm) in diameter or at least 1/2” (13mm) deep but not exceeding a total volume of 1 cubic inch (16.387 mL). A defected area is an area with a density of imperfections between 1/4” (6 mm) and 3/4” (19 mm) in diameter or between 1/4” (6mm) and 1/2” (13 mm) deep numbering 10 or more per 1 square foot (0.09 square meters) area. Air dry for at least 10 days after completion of the manufacturer’s recommended cure time for trowelable mortar. Brush abrasive blast, followed by air brooming or power sweeping, to remove dust and sand from the surface and opened pores.

between 12 and 48 hours after surface preparation by water blasting methods. Apply the sealer within 48 hours after abrasive blasting methods. Do not apply sealer if rain is anticipated within six (6) hours after application. Wait at least 12 hours after last rain event to apply sealer. Clearly mark where the sealer application stops if not continuous.

per gallon (2.9 square meters per liter). Use a coverage rate of 150 square feet per gallon (3.6 square meters per liter) when the Laboratory’s Qualified Products List for the epoxy authorizes it. Apply the urethane coat of the epoxy-urethane sealer at a rate of 200 square feet per gallon (4.8 square meters per liter). When surfaces are not smooth and flat, adjust the given coverage rates by the following formulas to determine the correct coverage rate. 350

specified coverage rate (sq ft/gal [sq m/l]) × 0.8

specified coverage rate (sq ft/gal [sq m/l]) × 0.7

specified coverage rate (sq ft/gal [sq m/l]) × 0.5

temperature is 50 ºF (10 ºC) or above, 5 ºF higher than the dew point, and the relative humidity is 80% or below during the application of the sealer.

manufacturer.

meet the manufacturer’s written recommendation provided to the Engineer during 512.03.D. Use epoxy and urethane from the same manufacturer. Achieve specified coverage regardless of the number of passes per coat.

content shall be limited so as not to reduce sealing effectiveness of the second coat. Refer to the plans for colors for specific projects.

traffic, integrate 1 1/2 lbs per square yard (0.8 kg/m²) of silica sand into the surface of the second coat to produce a nonskid surface satisfactory to the Engineer.

under the observation of the Engineer.

sidewalks); Minimum, one gallon (3.875 liter) of sealer for each 100 square feet (9.0 square meters).

Minimum, one gallon (3.875 liter) for each 125 square feet (11.5 square meters).

Minimum, one gallon (3.875 liter) for each 150 square feet (14.0 square meters). Stone or fluted formed concrete surfaces may require additional sealer materials for coverage.

acceptable application procedure consists of saturating the surface and waiting a few seconds for the sealer to completely penetrate the concrete surface. Broom in the sealer if recommended by the manufacturer.

runs of 6 to 12 inches develop. Apply additional passes in 10 to 15 minute intervals until the coverage rate is achieved. Apply sealers with brush or roller if recommended by the manufacturer. 351

concretes where the required coverage is not absorbed.

32 °F (0 °C) within 12 hours after application.

both on horizontal and vertical surfaces, and on different concrete types, demonstrating:

rate.

sealer. Use at least 1/2 gallon (2 liter) of sealer, following the manufacturer’s recommended method of application, for the total of the test surfaces.

parapet or pier face for the vertical test surface so different textures are tested.

match the test section. Recoating, removal and re -application or other methods recommended by the manufacturer will be required to correct final appearance. Non -Epoxy Sealers: The sealer shall result in a uniform appearance.

sealer. Keep traffic off a non-epoxy sealer until the sealer is dry.

a copy of the SDS sheet for information before any work commences.

especially when applying sealer to the fascia or the underside portions of a bridge that spans an area used by the public. During sealing, mask off, or use other means of protection, for surfaces not being sealed. Protect asphalt and mastic type surfaces from spillage and heavy overspray. Do not apply sealers to joint sealants which have not cured according to the manufacturer’s instructions. Joint sealants, traffic paints and asphalt overlays may be applied to the treated surfaces 48 hours after the sealer has been applied. Protect nearby steel, aluminum or glass surfaces when non -epoxy overspray could be deposited on those surfaces.

drop cloths.

complete a Sealing of Concrete Surfaces training prequalification course offered by the Department. The course must have been completed within the past four years and an individual course certificate must have been received by the Superintendent. Present certificate to the Engineer prior to beginning the sealing of concrete surfaces work. Work will not be permitted to begin until after the Superintendent provides a valid course certificate.

512.04Sealing Concrete Bridge Decks with HMWM Resin . This work shall consist of

preparing and treating the concrete wearing surfaces of bridge decks with a penetrating sealer in accordance with these specifications, in reasonably close conformity with the plans and the manufacturer’s recommendation and as directed by the Engineer. 352

March 31st.

Sweep, abrasive blast, then with the use of a manual or power broom sweep and blow with compressed air so that the surfaces to which the sealer is to be applied is dry and free of dust and dirt. Use high pressure compressed air to blow all loose material from visible cracks. Fit the cleaning equipment with suitable traps, filters, drip pans, driers and other devices to prevent oil and other foreign material from being deposited on the s urface. Do not allow traffic on the clean surface prior to application of the sealer. Remove existing pavement markings using a method as specified in 614.11.G.1.a. Remove all traces of asphalt or petroleum products and concrete curing seals by abrasive blasting prior to air sweeping.

physical qualities of the hardened resin as if promoted/initiated with 2 percent cobalt naphthanate (6 percent) and 2 percent cumene hydroperoxide. Store materials at 65 to 80 ° F (18 to 27 °C). Provide a system that has a resin gel time of not less than 40 minutes to not more than 1 1/2 hours at the time and temperature of application. Adjust the gel time to compensate for the change in temperature throughout the day. The temperature of the surfaces to be treated may range from 50 °F (10 °C) to 120 °F (49 °C). Arrange to have a technical representative on site to provide mixing proportions equipment suitability, and safety advice. Any conflict between these provisions and representative's advice shall be resolved at the job site. The technical representative shall remain at the job site until such time as he and the Engineer agree that the Contractor is qualified in all aspects of the application of the sealer. Do not allow the promoter and initiator, if supplied separate from the resin, to contact each other directly. Do not store containers of promoter or initiators together in a manner that will allow leakage or spillage from one to contact the containers or materials of the other. Machine application of the resin may be performed by using a two -part resin system utilizing a promoted resin for one part and an initiated resin for the other part. This two-part resin system may be combined at a spray bar through positive displacement atomization of the resin. Do not use compressed air to produce the spray. Use appropriate cleaning and flushing of equipment, tools, etc., with an appropriate solvent, as approved by the Engineer, in such a manner to minimize personal and environmental hazards. Advise workman that the resin will soften gum rubber soles, and a face -mask should be used to protect from accidental splashes. Clothing and leather saturated with resin will harden and become useless. Prior to resin application the surface to be treated shall be visibly dry and its temperature between 50 °F (10 °C) and 120 °F (49 °C). Do not apply the resin within 24 hours after a rain or when rain is forecast within 12 hours or when the ambient air tem perature is below 50 °F (10 °C). Pre -mark the deck to control mixed material usage and to provide a rate of application of approximately 100 square feet per gallon (2.45 m²/L). The exact rate shall be determined by the Engineer prior to commencing full-scale deck treatment operations. Before using the material submit to OMM copies of the manufacturer’s certified test data showing that the material complies with the requirements of this specification. The test data shall be developed by an independent approved testing laboratory, and shall include the brand name of the material, name of manufacturer, number of the lot tested and date of manufacture. When the material has been approved by OMM, further testing by the manufacturer will not be required unless the formulation or manufacturing process has been changed, in which case new certified test results will be required. The 353 manufacturer shall certify that the formulation is the same as that for which data has been submitted. The state reserves the right to sample and test delivered lots for compliance. Flood the deck surfaces resin, allowing penetration into the concrete and filling of all cracks. Limit the initiated mix of promoted resin to 5 gallons (19 L) at a time for manual application. A significant increase in viscosity shall be cause for rejection. Apply the treatment within 5 minutes after complete mixing. Redistribute excess material by squeegee or brooms within 10 minutes after application. Take all steps necessary to prevent the resin from flowing into lanes open to traffic. Broadcast sand over the entire treated area of the bridge deck by mechanical means to affect a uniform coverage of 0.80 to 1.2 pounds per square yard (0.43 kg/m² to 0.65 kg/m²). The sand shall be uniformly graded aggregate conforming to the quality requirements of 703 and shall conform to the following limits for grading: Sieve Size Total Percent Passing No. 4 (4.75 mm) 100 No. 8 (2.36 mm) 90 to 100 No. 20 (850 µm) 5 to 15 No. 50 (300 µm) 0 to 5 It is the intention of the specification to allow the use of commercially available blast sands applied by a common lawn broadcast type seeder/spreader. Place sand between 10 to 15 minutes behind the resin spreading front and before any jelling of the resin occurs. If the surface contains large deep cracks, the low-viscosity liquid could run completely through the concrete slab. Apply a second coat in these areas after the first coat has started to cure. Before the monomer hardens, fill imperfections or spalls with standing liquid with commercial quality concrete or sandblast sand, and finished to a uniform surface. The sand shall have a maximum moisture content of 0.5 of the percent of absorption when tested in accordance to a California Test 226. Do not permit traffic and equipment on the tested deck until it is tack free and a minimum of 6 hours have elapsed since treatment and the sand cover adheres sufficiently to resist brushing by hand. Protect the treatment from moisture for not less than 4 hours after placement.

512.05Soluble Reactive Silicate (SRS) Concrete Treatment. This item consist of the

necessary labor, materials and equipment to prepare and treat portland cement concrete surfaces with a reactive silicate sealer meeting these specifications.

equipment, tanks, hoses, brooms, rollers, coaters, squeegees, etc., that are thoroughly clean, free of foreign matter, oil residue and water prior to applying the treatment.

completed and reached the design strength of the patch material . Thoroughly clean the surface to remove dust, dirt, oil, wax, curing components, efflorescence, laitance, coatings and other foreign materials. Sweep, abrasive blast, then with the use of a manual or power broom sweep and blow with compressed air so that the surfaces to which the sealer is to be applied is dry and free of dust and dirt. Use high pressure compressed air to blow all loose material from visible cracks. Obtain the approval of the manufacturer or its representative before the use of chemicals and other cleaning compounds to facilitate the removal of these foreign materials. Apply the treatment within 48 hours following surface preparation. 354 Fit cleaning equipment with suitable traps, filters, drip pans and other devices to prevent oil and other foreign material from being deposited on the surface.

different components of the structure to be treated for the purpose of demonstrating the desired physical and visual effect of an application or of obtaining a visual illustration of the absorption necessary to achieve the specified coverage rate prior to final application. In the latter case, use at least 1/2 gallon (2 L) of treatment following the manufacturer’s recommended method of application for the total of the test surfaces. Lo cate horizontal test surfaces on the deck and on the safety curb or sidewalk and locate vertical test surfaces on an abutment parapet and pier face so that the different textures are displayed.

the SRS by thoroughly saturating the concrete surfaces at an application rate specified by the manufacturer. Apply the SRS when the concrete surface temperature is above 35 °F (2 °C). Use a surface thermometer on the concrete to establish the temperature of the concrete if the air temperature at the time of application is 45 °F (7 °C) or below. Spread the SRS from puddles to dry areas. If unable to complete the entire application continuously, note and clearly mark the location where the application was stopped.

adjoining surfaces of the structure which are not to be sealed when applying a treatment. Make provision to protect the public when treating the fascia of a bridge and/or portions of the underside of the deck of a bridge that spans an area used by the public. Protect asphalt and mastic type surfaces from spillage and heavy overspray. Do not apply joint sealants, traffic paints and asphalt overlays to the treated surfaces until 48 hours after the treatment has been applied. Cover adjoining and nearby surfaces of aluminum or glass where there is a possibility of the treatment being deposited on the surfaces. Protect plants and vegetation from overspray by covering with drop cloths. Follow precautions as indicated on the manufacturer’s SDS.

unreacted material on the surface after application(s), flush with fresh water, as recommended by the manufacturer. Contain all waste according to 107.19.

512.06Treating Concrete Bridge Decks with Gravity-Fed Resin. This work shall consist of

preparing and treating the concrete bridge deck with a gravity-fed crack welding system in accordance with these specifications in reasonably close conformity with the plans and the manufacturer’s recommendations and as directed by the Engineer.

March 31st. Prior to resin application insure that the surface to be treated is visibly dry with a temperature between 40 °F (4 °C) and 100 °F (38 °C). Do not apply the resin within 24 hours after a rain, during rain, when rain is forecast within 12 hours or when the ambient air temperature is below 40 °F (4 °C).

abrasive blasted surfaces to which the sealer is to be applied, then manual or power broom swept and 355 blown with compressed air so that they are dry and free of dust and dirt. Use high pressure compressed air to blow all loose material from visible cracks. Use a high pressure water blast followed by an air blast if particles are highly embedded in the crac ks, to clean cracks. Fit the cleaning equipment with suitable traps, filters, drip pans, dryers and other devices to prevent oil and other foreign material from being deposited on the surface. Do not allow traffic on the clean surfaces prior to application of the sealer. Remove existing pavement markings using a method as specified in 614.11.G.1.a. Remove all traces of asphalt or petroleum products and concrete curing by the abrasive blasting prior to air sweeping.

of approximately 100 to 150 square feet per gallon (2.45 to 3.68 m²/L). The Engineer will determine the exact rate but will not exceed 150 square feet per gallon (3.68 m²/L). Flood the area to be sealed with resin. Allow the resin to penetrate into the concrete and fill all cracks. Mix the resin to a limit of 5 gallons (19 L) at a time for manual application. Reject resin with a significant increase in viscosity. Redistribute excess material by a squeegee within 10 minutes after application. Front and back movement with the squeegee is recommended over cracks and patch perimeters to enhance penetration. Take all steps necessary to prevent the resin from flowing into lanes open to traffic. Broadcast sand over the entire sealed area of the bridge deck by mechanical means to effect a uniform coverage of 1 to 2 pounds per square yards (0.54kg/m² to 1.08 kg/m²). Protect the treatment from moisture for not less than 6 hours after placement.

has elapsed since treatment, and the sand cover adheres sufficiently to resist brushing off by hand.

512.07Sealing Cracks by Epoxy Injection . This specification covers the repair of dry, moist

or wet cracks or fractures that are 2 to 100 mils (50 to 2500 µm) in thickness in reinforced concrete members. The repair is by means of an epoxy injection system. This system shall consist of a paste epoxy used to seal the surface cracks and an injection epoxy used under low pressure, 200 psi (1400 kPa) max., to penetrate and fill the cracks and bond the crack surfaces together. Material for each epoxy shall consist of a two-component modified resin bonding system. The unmodified resin shall be known as Component A and the hardener as Component B. Arrange to have a manufacturer’s representative at the job site to familiarize him and the Engineer with the epoxy materials, application procedures and recommended pressure practice. This representative shall direct at least one complete crack or area injection and be assured prior to his departure from the project that the personnel are adequately inf ormed to satisfactorily perform the remaining repairs. Furnish the Engineer a copy of the manufacturer’s comprehensive preparation, mixing and application instructions which have been developed especially for use with the proposed epoxy injection system. Ensure that any significant changes to these instructions which are recommended by the representative for an unanticipated situation have been approved by the Engineer prior to the adoption of such changes. Clean concrete surfaces adjacent to the cracks to be sealed only to the extent necessary to achieve an adequate bond with the paste epoxy, and only by procedures which will not cause abrasive grits or concrete dust to penetrate the cracks. Do not permit th e use of solvents or thinners in cracks or on bonding surfaces. Install injection ports or tees in cracks to be injected. Space injection ports or tees at 6 to 12 inches (150 to 300 mm) vertically and 6 to 18 inches (150 to 450 mm) horizontally but in no case closer together than the thickness of the concrete member if full depth penetration is desired unless otherwise 356 specified or directed. Set ports or tees in dust free holes made either with vacuum drills or chipping hammers. Seal all surface cracks in the area to be repaired, after injection ports or tees have been inserted into the holes, with paste epoxy between po rts to ensure retention of the pressure injected epoxy within the confines of the member. The Department will allow an alternative procedure of sealing the cracks before the injection holes have been made. Limit the application of paste epoxy to clean and dry surfaces. Limit substrate temperatures to not less than 45 °F(7 °C) during epoxy applications. Begin the epoxy injection at the bottom of the fractured area and progress upward using a port or tee filling sequence that will ensure the filling of the lowermost injection ports or tees first. Establish injection procedures and the depths and spacings of holes at injection ports or tees. Use epoxy with flow characteristics and injection pressure that ensure no further damage will be done to the member being repaired. Ensure that the epoxy will f irst fill the innermost portion of the cracked concrete and that the potential for creating voids within the crack or epoxy will be minimized. Remove the injection ports or tees flush with the concrete surface after the fractured area has been filled and the epoxy has partially cured (24 hours at ambient temperature not less than 60 °F (16 °C), otherwise not less than 48 hours). Roughen the surfaces of the repaired areas to achieve uniform surface texture. Remove any injection epoxy runs or spills from concrete surfaces. Obtain two 4 -inch (100 mm) diameter core samples in the first 100 linear feet (30 m) of crack repaired and one core for each 100 linear feet (30 m) thereafter. Take the core samples from locations determined by the Engineer and for the full crack depth. Cores will be visibly examined by the Engineer to determine the extent of epoxy penetration. Repair the core holes in the concrete with material specified in 705.21.

512.08Waterproofing

spray equipment. If using spray equipment, provide portable power pressure type spraying equipment capable of being moved to the location of the waterproofing operation. Protect concrete surfaces not covered with waterproofing from overspray, spilling, or otherwise marring of the surface with the asphalt materials. Ensure that the edge of any exposed application is sharply defined true to line with a uniform exposure. Do not apply waterproofing fabric or membranes over attachments and hardware. Seal the discontinuities in waterproofing with Asphalt, 702.06, or hot applied joint sealer, 705.04.

dirt and the outside film of cement. Before applying asphalt materials, ensure that the concrete is clean and dry and the concrete temperature is at least 40 F (4 C).

concrete clean. Fill joints or cracks greater than 3/8 inch (10 mm) wide with portland cement mortar. In addition to the above, remove oil and grease from surfaces for T ype 3 membranes using water and a detergent designed to remove oil and grease from concrete. Flush residual detergent from the surface. Do not allow traffic on the cleaned surface. 357

material per square yard (square meter). For primer coats applied between June 1 and September 1, use asphalt primer for waterproofing or emulsified asphalt primer conforming to 512.02. For primer coats applied between September 1 and June 1, use asphalt primer for waterproofing conforming to 512.02. If practical, apply asphalt emulsion using spray equipment. If subjected to traffic, spread sand on the primer coat for protection. Broom off excess sand before applying asphalt waterproofing.

coats of asphalt material conforming to 702.06 to provide a total of at least 1 gallon (5 L) of asphalt per square yard (m²) on flat areas and at least 1/2 gallon per square yard (3 L/m²) on vertical or sloping surfaces. Start applying the waterproofing at the lowest point, and progress to a higher el evation. Uniformly cover the surface except apply more asphalt in corners and over construction joints. Apply the asphalt material at a temperature from 250 to 350 F (121 to 177 C).

asphalt material conforming to 702.06, and two layers of waterproofing fabric conforming to 711.24 applied as follows:

from 250 to 350 F (121 to 177 C).

following:

18 inches (0.5 m) wide] strip of fabric. For the second strip use a full-width strip of fabric, and lap the entire width of the first strip. Lap each succeeding strip 2 inches (50 mm) more than half its full width. Lap the fabric strips in the direction of water flow.

the second strip, lay another full-width strip, covering the first. Lay each strip without wrinkles, folds, or pockets. Thoroughly coat the strip with asphalt for the full width of the lap before laying the succeeding strip. Each application shall entirely conceal the texture of the fabric.

square yard (m²). Lap ends of fabric strips at least 12 inches (0.3 m), and stagger the end joints.

waterproofing material conforming to 702.08. Apply the coating when the air temperature is 40 ºF (4 ºC) or above, on a clean and dry surface, at a rate of 20 to 30 square feet per gallon (0.49 to 0.74 m²/L) to achieve a total thickness of 55 to 65 mils (1375 to 1625 μm). Cover after cured according to the manufacturer’s recommendation and within 45 days of application. 358

and peel-and-stick waterproofing membrane 711.25. Follow manufacturer’s written recommendations for application of this product, which shall be provided to the project. After installing the primer coat, if required, remove the membrane’s release liner and place the adhesive side on the prepared concrete surface. Lay the membrane smooth and free of wrinkles. Lap joints in membranes by at least 1 inch (25 mm). Store membrane materials indoors at temperatures not to exceed 120 °F (49 °C). For precast concrete three - and four-sided structures, install Type 2 membrane on the exterior vertical and exterior top horizontal surfaces.

conforming to 705.04 and a waterproofing membrane consisting of a high density asphalt mastic between two layers of polymeric fabric conforming to 711.29. The application of this product shall follow the manufacturer’s written recommendations, which shall be provided to the project. Keep membrane and primer materials dry before installation. Heat the membrane primer in an oil primer heated, double -jacket kettle. Use a kettle that is clean and free of other materials with any obvious buildup scraped out. The Contractor may use a single - jacket kettle if the primer is capable of being heated in direct fire to the application temperature. Heat primers within the manufacturer’s recommended temperatures. On bridges with curbs, apply the primer and membrane 3 inches (75 mm) up the curb face. On prestressed box beam bridges with no approach slab, apply the primer and membrane 6 inches (150 mm) over the ends of the beams. On prestressed and slab bridges with approach slabs, apply the primer 2 feet (600 mm) out onto the approach slab. If the plans require a Type 3 membrane on the top exterior surface of precast concrete three - or four-sided structures, apply the primer and membrane to overlay the vertical exterior sides of the structure by 12 inches (300 mm). Apply primer no further than 5 feet (1.5 m) in front of the membrane using a squeegee to fill all voids and imperfections. Apply membrane from the low to the high side of the surface. Apply an extra bead of primer at the edge of the membrane. Lap joints in membranes by at least 3 inches (75 mm). After installing the membrane over the entire surface, seal joints in the membrane by applying primer and smoothing with a V-squeegee. If asphalt pavement is to be placed directly over the water proofing membrane, first apply tack coat as specified in 407 without damaging the membrane.

512.09Method of Measurement. The Department will measure Waterproofing , of the type

specified, by the number of square yards (square meters) or on a lump sum basis. The Department will measure sealing of concrete surfaces by the number of square yards (square meters) of coated area projected to a two-dimensional surface. The Department will measure the removal of existing coatings from concrete surfaces in square yards (square meters) removed. The Department will measure the sealing of concrete bridge decks with HMWM resin and treating concrete bridge decks with SRS as the actual area in square yards (square meters ) of surfaces treated. The Department will measure the actual length in linear feet (meters) of crack repaired by epoxy injection. The Department will measure the removal of pavement markings using the same method of measurement as completed markings in the units designated per Item 641. 359

512.10Basis of Payment. The Department will pay for accepted quantities at the contract prices

as follows: The Department will consider the cost for the obtaining and repairing the two cores used by the Engineer to determine the extent of the epoxy penetration as incidental to the work of repairing the concrete by epoxy injection. The Department will consider the removal of dust, dirt, oil, wax, curing compounds, efflorescence, laitance, and other foreign materials as incidental to the surface preparation of the concrete surfaces to be sealed. When the surface to be sealed contains an existing coating, the Department will consider all materials, equipment and labor to remove the existing coating as incidental to the pay item Removal of Existing Coatings from Concrete . When the surface to be sealed contains pavement markings, the Department will consider all materials, equipment and labor to remove the existing pavement markings as incidental to the pay item Removal of Existing Pavement Marking. Item Unit Description Square Yard Sealing of concrete surfaces (Square Meter) Square Yard Sealing of concrete surfaces (Square Meter) (non-epoxy) Square Yard Sealing of concrete surfaces (Square Meter) (epoxy urethane) Square yard Sealing of concrete bridge (Square Meter) decks with HMWM resin Square yard Treating concrete bridge (Square Meter) decks with SRS Square yard Treating concrete bridge (Square Meter) decks with Gravity-Fed Resin Foot Concrete repair by epoxy injection (Meter) Square Yard Type A Waterproofing (Square Meter) or Lump Sum Square Yard Type B Waterproofing (Square Meter), or Lump Sum Square Yard Type E Waterproofing (Square Meter), or Lump Sum Square Yard Type 2 Waterproofing (Square Meter), or Lump Sum Square Yard Type 3 Waterproofing (Square Meter), or Lump Sum Square Yard Removal of Existing Coatings from Concrete (Square Meter) Surfaces Linear Feet or Removal of Existing Pavement Marking Square Foot (Meter or Square Meter), 360 or Each 361