Wisconsin WisDOT Standard Specifications (within FDM) — Section 475

Effective with the December 2018 Letting 190 2019 Standard Spec ifications Section 475 Seal Coat

475.1Description

(1)This section describes applyi ng asphaltic material and an aggregate cover on a previously completed

surface.

475.2Materials

(1)Furnish asphaltic materials for seal coat conforming to 455.

(2)Furnish aggregates conforming to 460 except as follows:

1.Aggregate retained on the No . 4 sieve shall have 10 percent , by weight, or less flat & elongated pieces

based on a 5:1 ratio.

2.The percent wear, measured according to AASHTO T96, shall n ot exceed 40 after 500 revolutions.

3.At least 60 percent, by co unt, of the aggregate retained on the No. 4 sieve shall have one or more

fractured face.

4.Conform to the following gradation requirements:

SIEVE PERCENT PASSING BY WEIGHT 1/2-inch 100 No. 4 0-60 No. 16 0-5

475.3Construction

475.3.1 General

(1)Construct seal coat to the full width of the existing surface unless the contract or engineer specify

otherwise. Use asphaltic material of the type and grade the spe cial provisions designate. Apply at the plan rate.

(2)Apply asphaltic material only if the air temperature is 60 F o r more, and the surface is clean and dry.

Do not apply before impending ra ins if rain might damage the ma terial before placing and rolling the cover aggregates. Limit the surface area treated with asphaltic material in a single day to what can be covered with aggregate and rolled during daylight hours. 475.3.2 Equipment

(1)Provide equipment to heat and dist ribute asphaltic material as specified for applying tack coat in

455.3.2.2 .

(2)Provide additional equipment as follows:

- Power broom. - Mechanical spreader capable o f applying aggregat e uniformly a t the plan rate. - Self-propelled steel-wheel roller weighing between 6 and 9 to ns. - Self-propelled, pneumatic-tire roller.

(3)Use pneumatic-tire rollers wit h tires on one axle arranged to cover the spaces between tires on the

other axle. Ensure that all tires are the same size and uniformly inflated. During roller operation, ensure that the wheel load and tire contact pressure is 30 psi or greater, unless t he contract specifies otherwise. If the engineer requests, furnish manufacturer docum entation showing the contact areas and contact pressures for various wheel loadings and tire inflation pressures.

(4)Ensure rollers are in good mech anical condition, capable of operating both forwards and backwards,

and the operating mechanism allo ws for starting, stopping, or r eversing direction in a smooth manner, without loosening or distorti ng the surface being rolled.

(5)Equip rollers with a drum or ti re lubricator. Do not lubricate with petroleum or tar products.

475.3.3 Preparing the Surface

(1)Immediately before applying t he asphaltic material, clean the existing surface with a power broom or

other suitable equipment to remov e dirt, clay, or other objecti onable matter. 475.3.4 Heating and Applying Asphaltic Material

(1)Heat and distribute asphaltic material as specified for applyi ng tack coat in 455.3.2. Cover previously

applied material as required to c reate transverse joints withou t overlapping. Close treated areas to traffic until after applying the cover aggregate. 475.3.5 Applying and Rolling Aggregate

(1)After the asphaltic material dev elops sufficient tackiness, sp read aggregate uniformly over the treated

surface. Dry or moisten the aggregate to ensure that it is damp to surface dry. If t he engineer directs, moisten the aggregate to control dust. The engi neer will determ ine the appropriate application rate to

Effective with the December 2018 Letting 191 2019 Standard Spec ifications completely cover the treated sur face but limit the application to what is easily embedded in and bonded by the asphaltic material.

(2)Roll the surface immediately a fter spreading the aggregate with a steel-wheel roller. Begin at the

edges and continue to the center , lapping 1/2 the roller width on each successive pass. After this initial rolling, perform subsequent rolling using both steel-wheel rollers and pneumatic-t ire rollers until thoroughly embedding the aggregate and the surface is smooth an d uniform in texture. Regulate the speed and take care when reversi ng roller direction to avoid di splacing or loosening the cover aggregate, or damaging the asphaltic material.

(3)If the engineer directs, lightly broom the surface to remove e xcess loose material.

475.3.6 Maintenance

(1)Maintain the work until acceptance. Repair damage and correct areas with excess or deficient

asphaltic material or aggregate cover during this maintenance p eriod.

475.4Measurement

(1)The department will measure Seal C oat by the cubic yard or by the ton acceptably completed,

measured as the quantity of seal coat aggregate. The department will measure volume or weight in the vehicle and deduct for material wasted or not actually inco rporated in the work.

475.5Payment

(1)The department will pay for measured quantities at the contrac t unit price under the following bid

items: ITEM NUMBER DESCRIPTION UNIT

475.0100 Seal Coat CY

05 Seal Coat TON

(2)Payment for Seal Coat is full co mpensation for preparing the s urface; for heating and applying

asphaltic material; for drying o r moistening, applying, and rol ling the cover aggregate; and for brooming, finishing, and maintaining the surface.

(3)The department will pay for asphal tic materials separately under the Asphaltic Material Seal Coat bid

item as specified in 455.5 .

Effective with the December 2018 Letting 192 2019 Standard Spec ifications Part 5 Structures

Effective with the December 2018 Letting 193 2019 Standard Spec ifications Section 501 Concrete

501.1Description

(1)This section describes proportioning, mixing, placing, and pro tecting concrete mixtures.

501.2Materials

501.2.1 Portland Cement

(1)Use cement conforming to ASTM specifications as follows:

- Type I portland cement; ASTM C150. - Type II portland cement; ASTM C150. - Type III portland cement; ASTM C150, for high early strength. - Type IP portland-pozzolan cement; ASTM C595, except maximum loss on ign ition is 2.0 percent and maximum pozzolan content is 30 percent. - Type IS portland blast-furnace slag cement; ASTM C595 , except maximum slag content is 30 percent. - Type IL portland-limestone cement; ASTM C595, except maximum nominal limestone content is 10 percent with no individual test result exceeding 12.0 percent. - Type IT ternary blended cement; ASTM C595, except maximum limestone content is 10 percent and maximum pozzolan and slag combined content is 30 percent.

(2)Store cement of diffe rent types, brands, and sources separately. Keep batches of concrete made from

different types, brands, and sources from becoming intermixed i n the work, unless the engineer approves otherwise.

(3)The engineer will reject cement that is partially set or that contains lumps.

(4)The engineer may reject cement i f, the temperature at the time of delivery to the mixer exceeds 165 F.

To avoid this, store it until i t cools to at least 165 F before incorporating into the batch. 501.2.1.1 Testing

(1)Test according to AASH TO standard methods.

(2)Determine fineness by the air permeability test method performed according to AASHTO T153.

(3)If testing for setting time, bas e results on the Gillmore test method according to AASHTO T154.

501.2.1.2 Certification

(1)Obtain cement from manufacturers whose products comply with th e department's certification method

of acceptance for cement, unless the engineer agrees to accept cement under alternate procedures allowed in the department's certification method.

(2)Provide a manufacturer's written certification for blended cem ents stating the source, quantity, and

composition of essential consti tuents and the composition of th e final cement provided under the contract. 501.2.2 Air-Entraining Admixtures

(1)If using an air-entraining admi xture, the contractor must submit evidence based on tests made in a

recognized laboratory to show t hat the material conforms to AAS HTO M154 for 7- and 28-day compressive and flexural strengths and resistance to freezing a nd thawing, except as specified in 501.2.2(2) . The engineer will not require tests for bleeding and setting time. Within 501, a recognized laboratory is any state departm ent of transportation, FHWA, or any cement and concrete laboratory regularly inspected by the Cement and Concrete Reference Labora tory. The department may test samples taken from a quantity t hat the contractor submits for u se on the project, or it may test samples the manufacturer submits and certifies as representative of the admixture it is supplying.

(2)Admixtures manufactured by neut ralizing vinsol resin with caus tic soda (sodium hydroxide) are an

exception to the requirements i n the above par agraph. If the co ntractor plans to use this admixture, then it must submit a certification of the admixture in the fol lowing form: "This is to certify that the produ ct (trade name) as manufactured and sold by the (company) is an aqueous solution of vinsol resin that has been neutralized with sodium hydroxide. The ratio of sodium hydroxide to vinsol resi n is one part of sodium hydroxid e to (number) parts of vinsol resin. The percentage of solids based on the residue dried at 221 F is (number). No other additive or chemical agent is present in this solution."

(3)If the contractor offers to use an admixture that is essentially the same, with only minor differences in

concentration, as another previo usly department-approved material, the department will require a certification stating it is essentially the same as the departm ent-approved admixture, and that it contains no other admixture or chemical agent.

Source: Wisconsin Standard Specifications for Highway and Structure Construction, 2019 Edition. Pages 199–201 of 601.

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465 Asphaltic Surface

501 Concrete