606 - MICROSURFACING
600-46 e. Curing. Provide adequate means to protect the microsur face from damage by traffic until the mixture
has cured sufficiently. Allow the surface of microsurfacing to cure so as to not adhere to or be picked up by the tires of vehicles. Allow traffic to use the microsurfacing when cured. Cure the material used for filling wheel ruts a minimum of 24 hours before the full width coverage is applied.
f.Maintenance of Traffic. Maintain traffic according to DIVISION 800 and the following: Station 1 flagger immediately ahead of the application of the microsurfacing material and 1 flagger immediately behind the section being cured. Display suitable speed limit signs and “fresh oil” sign s. Move the signs forward with the flaggers as the work progresses. Suspend application of the microsu rface early enough each day to permit traffic to safely travel over the completed work before sunset. Repair any traffic damage to the mi crosurface at Cont ractor expense.
g.Seasonal and Weather Limitations. Construct the microsurfacing between May 1 and October 15. Do not place microsurfacing when the ambi ent air temperature is less than 50ºF, or the weather is foggy or raining, and the air temperature is forecaste d to go below 32ºF within 24 hours following the placement.
h.Observation Period. The Engineer, along with th e Contractor, will inspect the microsurfacing 30 days after work is completed on the microsurfacing. Repair ar eas where there is no cover material left in place (bare areas) as directed by the Engineer: In 5% the wheel paths; and Individual areas ≥ 10 square yards; and Where the total square yards of bare areas is greater than 5% of the total square yards of the seal.
g.Pavement Smoothness. Microsurfacing is excluded from profilograph testing, and not eligible for pay adjustments. 606.4 MEASUREMENT AND PAYMENT The Engineer will measure aggregate for microsurfaci ng, emulsified asphalt (modified) and mineral filler by the ton. No deduction will be made for moisture in th e aggregate. When sacked portland cement is used, 1 sack equals 94 pounds. Water used for pre-wetting the pavement surface and mix water is subsidiary to ot her bid items and will not be measured for separate payment. Material used to correct surface deficiencies in the microsurfacing will not be measured for payment. Payment for "Aggregate for Microsurfacing", "Emulsif ied Asphalt (Modified)" and "Mineral Filler" at the contract unit prices is full comp ensation for the specified work. 607 - ASPHALT PRIME COAT
600-47 Section 607
ASPHALT PRIME COAT 607.1 DESCRIPTION Treat a previously prepared surface with asphalt material, and apply bl otter material, when required, as specified in the Contract Documents. B I D I T E M S U N I T S E m u l s i f i e d A s p h a l t ( * ) T o n C u t b a c k A s p h a l t ( * ) T o n *Designated Type and Grade. 607.2 MATERIALS Provide asphalt materials that comply with DIVISION 1200 . 607.3 CONSTRUCTION REQUIREMENTS
a.Preparation of Road Surfaces. Before distributing asphalt materi als, blade the surface of the roadbed to a smooth, uniform cross-section. Broom off all loose ma terials, and clean the surface until it is free from dust. Shape, blade and broom side roads that receive asphalt treatment, at the same time as the roadbed surface. When required by the Engineer, give the br oomed surface of an earth subgrade or a water-bound base course or subbase a light application of water (approximately 0.1 gallon per sq uare yard) before the asphalt material is applied.
b.Protection of Adjacent Structures. Protect the surfaces of all structures and other roadway appurtenances from damage or splatter of asphalt material. Restore any damaged or splattered appurtenances to their original condition at own expense.
c.Temperature of Asph alt Materials at Time of Application. Apply asphalt material at the temperature specified in TABLE 601-1 , or included on the producer’s Bill of Lading.
d.Prime Coat. Apply the prime coat to earth subgrades, wa ter-bound base courses and subbases as soon as practicable after they have been prepared and are sufficiently dry. Apply the prime coat to asphalt surfaces immediately after final rolling, and before any traffic has been allowed upon or the surface has hardened and glazed hindering the penetration of asphalt material. Using a distributor (see subsection 155.2 ), uniformly apply asphalt material at the rate shown in the Contract Documents. Frequently check and adjust the spray nozzles and spray bar to obtain uniform distribution. Should any nozzle malfunction, immediately stop distribution. Correct any deficiency before distribution is resumed. Only use hand sprayers for areas that can not be primed by normal operation of the distributor.
e.Protection of Prime Coat After Application. Maintain the prime coat and the surface of the subgrade or base course until it has been covered by the surface co urse or until final acceptan ce of the work. Clean all damaged areas of loose material, repair them satisfactorily and reapply the prime coat. Such maintenance and repair is at the Contractor’s expense. After 48 hours, the Engineer may require a light application of blotting material on specified areas to prevent damage from traffic. Use a clean fine sand or other approved material.
f.Seasonal and Weather Limitations. Construct asphalt prime coats between May 1 and October 15 when the ambient air temperature is 60ºF and rising, and the weather is not rainy or foggy. These limitations may be modified with written approval from the Engineer.
g.Pavement Smoothness. Asphalt prime coat is excluded from profilograph testing, and not eligible for pay adjustments. 607 - ASPHALT PRIME COAT
600-48 607.4 Measurement and Payment
The Engineer will measure emulsified asphalt and cutback asphalt by the ton. The Engineer will measure bl otter material by either the ton or the cubic yard in the vehicle at the time and place of unloading or at ot her points as designated by the Engineer. Blotting material w ill not be paid for as such, but will be included in the quantities of c over material or aggregate for base cour se, provided in the Contract Documents. Manipulation for prime coat will not be measured directly, but will be subsidiary to the item of manipulation for other phases of work. Any water for the preparation of the prime coat is subsidiary. Payment for "Emulsified Asphalt (*)" and "Cutback Asphalt (*)" at the contract unit prices is full compensation for th e specified work. 608 - CHIP SEALS
600-49 Section 608
CHIP SEALS 608.1 DESCRIPTION Apply asphalt material to the existing surface, followed by an application of cover material, as specified in the Contract Documents. B I D I T E M S U N I T S C o v e r M a t e r i a l ( * ) C u b i c Y a r d C u t b a c k A s p h a l t ( * ) T o n E m u l s i f i e d A s p h a l t ( * ) T o n A s p h a l t C e m e n t ( * ) T o n Water (Flexible Pavement) (Set Price) M Gallon Manipulation (Chip Seals) Station *Type and Grade 608.2 MATERIALS Provide materials that comply w ith the applicable requirements. Aggregate for Cove r Material ............................................................................... DIVISION 1100 Asphalt Mate rial .................................................................................................... DIVISION 1200 Water ..................................................................................................................... DIVISION 2400 608.3 CONSTRUCTION REQUIREMENTS
a.Preparation of Surfaces. Before applying asphalt material, clean all foreign material from the surface to be treated. Broom surface to remove dust.
b.Protection of Adjacent Structures. Protect the surfaces of all structures and other roadway appurtenances from damage or splatter of asphalt material. Restore any damaged or splattered appurtenances to their original condition at own expense.
c.Temperature of Asphalt Material s at Time of Application. Apply asphalt material at the temperature specified in TABLE 601-1 , or as shown on the producer’s Bill of Lading.
d.Application of Asphalt Material. Using a distributor (see subsection 155.2 ), uniformly apply asphalt material at the rate shown in the Cont ract Documents. Equip and operate the distributor to prevent asphalt material from dripping on the pavement. At the beginning of each spread, start the application on a strip of building paper, approximately 3 feet in width and 1 foot longer than th e spray bar. If the spray cut-off is not pos itive, use paper at the end of each spread. Remove and dispose of the paper in a satisfactory manner. Open the spray bar when the distributor is moving forward at proper speed, unless the distributor is equipped to apply the specified rate from a standing start. Correct any skipped areas or deficiencies. Co nstruct junctions (joints) of spread s to obtain a smooth riding surface. Do not spread more asphalt material than can be immediately covered. Regulate the distribution of the asphalt material to obtain a uniform application. Do not allow the distributor to "blow". Frequently check and adjust the angle of the spray nozzles and the height of the spray bar to obtain uniform distribution. If the spray bar rises as the load is re moved, contributing to drilling and streaking, modify the distributor to maintain a constant spray bar height. Immediately stop distribution should any nozzle malfunction. Correct any deficiency before distribution is resumed. 608 - CHIP SEALS
600-50 e. Application of Aggregate. Immediately following the application of the asphalt material, spread cover
material with a self-propelled aggregat e spreader in quantities designated in the Contract Documents. The tires of the trucks or aggregate spreaders shall not come in contact with the fresh asph alt material at any time. Do not allow the asphalt material to remain uncovered long enough to impair retention of the cover material. Do not apply the spread width of the cover materi al greater than 6 inches wide r than the spread width of asphalt material. Uniformly cover the asphalt before rolling. Equip an d operate spreading equipment to provide complete coverage. Brooming, dragging or blading of the cover ma terial is prohibited before initial rolling. Perform any rearrangement of the cover material by hand methods. Avoid overlapping applications of cover material and remove all spillage from the surface. At the time of delivery to the roadway, the moisture content of the cover material shall not exceed 3% by weight plus ½ the water absorption of the aggregate. Do not let free moisture drain from the truck. The moisture limitations do not apply if lightweight aggregate is used. When directed by the Engineer, moisten the cover material with water to eliminate or reduce the dust coating of the aggregate. Pe rform the moistening the day be fore the aggregate is used. Any operation of equipment that resu lts in displacement of the cover materi al or damage to the seal course is prohibited.
f.Rates of Application of Aggregate. When alternate types of cover mate rial are shown in the Contract Documents, the quantities of aggregate and asphalt material are for the purpose of estimating and bidding only. Once the Contractor designates the alternate type of aggregate to be supplied, the total quantities to be used and paid for are determined by using the application rates in TABLE 608-1 . No change in the contract unit price will be made. The application rate shown in TABLE 608-1 may be changed with written approval from the Engineer. TABLE 608-1: RATES OF APPLICATION FOR CHIP SEAL Type Composition Aggregate Cu. Yd./Mile 24 foot width* Asphalt Material Gal/Sq. Yd. Residue* Asphalt Type** CM-A Sand-Gravel 105 0.20 CRS-1H CM-B Sand-Gravel 135 0.23 CRS-1H CM-D Crushed Sandstone 145 0.27 CRS-1H or RS-1H CM-K Limestone 140 0.24 RS-1H CM-L-1 Lightweight 85 0.17 CRS-1H CM-L-2 Lightweight 115 0.26 CRS-1H CM-L-3 Lightweight 150 0.30 CRS-1H *Rates shown are estimated and will be adjust ed to comply with actual field conditions. ** Asphalt type may be changed with approval of the DME. If the quantity of cover material computed from TABLE 608-1 exceeds the amount used on the roadway, the Engineer will designate a stockpile location for this excess quantity. Locate the stockpile along the project, or at locations requiring a haul distance no longer than the most distant end of the project. The maximum quantity of cover material to be stockpiled is as follows: The amount shown on the Contract Documents minus the amount used on the road when one type of cover material is shown in the Contract Documents. The amount determined by using the application rates in TABLE 608-1 minus the amount used on the road when alternate types of cover materi al are shown in the Contract Documents. The amount specified by the Engineer minus the amount used on the road when the Engineer changes the application rates in TABLE 608-1 . Payment for the stockpiled material will be at the co ntract unit price per cubic yard of cover material.
g.Manipulation. Immediately following the application of cover material, embed using pneumatic rolling. Provide a minimum of 3 self-propelled pneumatic rollers. Ch eck the tire pressures of all tires on all rollers every morning. Inflate all tires on a roller to the same pressure . Provide this information to the Engineer before work
Source: Kansas Standard Specifications for State Road and Bridge Construction, 2015 Edition. Pages 283–287 of 978.