Tolerances Aggregate Gradation Tolerances (±) from JMF Sieve Size # 4 # 8 # 16 # 30 # 50 # 100 # 200 Tolerance 5.0% 5.0% 5.0% 5.0% 4.0% 3.0% 2.0%
General Quality Control Tolerances (±) Asphalt Cement Content Single Test 0.5 % from JMF Asphalt Cement Content Daily Average 0.2 % from JMF Application Rate: 2 lb/sq yd (as determined by 1,000 ft yield checks)
Verify and document quality control with the following minimum measures:
test per 500 tons of aggregate or one test per day of mixture production, whichever is greater.
emulsion once per production lot, according to the emulsion supplier. This sample shall be sent to MCS&T Division’s Emulsions Lab for testing.
percent asphalt content of the mixture using the equipment counter readings.
yield of the course being placed using the equipment counter readings.
Complete a separate d aily report for each truck mounted machine:
For Quality Assurance purposes, samples for gradation wi ll be taken from aggregate stockpiles designated by the Contractor for use. The frequency of sampling and testing will be established by the Engineer based upon the Division’s current acceptance program and local conditions encountered.
228 420.5 -METHOD OF MEASUREMENT : “Micro Surface, Single Course” and “Micro Surface, Multiple Course” will be measured by the Square Yard. The quantity will be determined by the Plan Quantity as provided for in the proposal unless otherwise directed by the Engineer. “Micro Surface, Rut Fill” will be measured by ton of dry aggregate complete and in place.
420.6-BASIS OF PAYMENT : Payment for Micro Surface, Multiple Course includes all materials, equipment, labor for preparing the surface, placing the micro surfacing mixture and complying with all requirements. The placement includes application of a leveling course and a final surface course for full width coverage as specified in the contract documents. Payment for Micro Surface, Single Course, includes all materials, equipment, labor for preparing the surface, placing the Micro Surfacing mixture and complying with all requirements. The placement includes application of a single course of mixture for full width coverage as specified in the contract documents. Materials placed in stockpiles or on the road not mee ting the required tolerances may be accepted at a reduced price if it is not considered detrimental to the life of the treatment by the Engineer in accordance with ISSA A -143, Section 3. The following price adjustment schedule will be used when appropriate and applied accordingly to representative material: (i.) One percent reduction in the bid price per square yard for each one -tenth percent the asphalt content is out of tolerance. (ii.) One-quarter percent price adjustment in the bid price per square yard for each o ne percent that the aggregate gradation is out of the job mix range. (iii.) One and a half percent reduction in the bid price per square yard for application rate dropping below the established rate by more than 2 lb/sq yd. If the application rate drops below th e established rate by more than 3 lb/sq yd, the material will not be accepted and measures will need to be taken by the contractor to correct for such deficiency
Price adjustments under 1, 2, and 3 above shall apply concurrently; however, price adjustmen t will not apply in the event the material is rejected. The disposition of rejected material will be subject to the approval of the Engineer
420.7-PAY ITEMS : ITEM DESCRIPTION UNIT 420002 -* Micro Surface, Single Course Square Yard 420003 -* Micro Surface, Multiple Course Square Yard 420005 -* Micro Surface, Rut Fill Ton
*Sequence number
RIGID PAVEMENT
229 SECTION 501 PORTLAND CEMENT CONCRETE PAVEMENT
501.1 -DESCRIPTION : This work shall consist of a pavement or an unbonded overlay pavement composed of Portland cement concrete, with or without reinforcement as shown on the Plans, constructed on a prepared subgrade, base course, or existing pavement in accordance with these Specifications and in reasonably close conformity with the lines, grades, thicknes ses, and typical cross sections shown on the Plans or established by the Engineer. Supplementary cementitious materials (fly ash, slag cement, and silica fume) conforming to the provisions of these specifications may be used as an additive to Portland Cement Concrete Pavement at the Contractor ’s option. These additives are not permitted when a blended hydraulic cement is used. For the purposes of cement material substitution with SCMs, Type IL cement shall not be treated as a blended cement, a nd a supplementary cementitious material (SCM) may be used with Type IL cement. A water reducing admixture may be used at the Contractor ’s option. A water reducing admixture shall not be used in conjunction with a water reducing retarder.
501.2 -MATERIALS : Materials shall meet the requirements of Division 700, as follows:
MATERIAL SUBSECTION Air Entraining Admixture 707.1 Coarse Aggregate 703.1 -4 Coated Dowel Bars 709.15 Curing Materials 707.6 -707.10 Fine Aggregate* 702.1 Joint Tie Bolt Assembly 709.7 Low Modulus Silicone Joint Sealant; Back -Up Material 708.4 Pavement Reinforcement 709.4, 709.6 Performed Elastomeric Joint Seals; Lubricant -Adhesive 708.2 Portland Cement 701.1, 701.3 Supplementary Cementitious Materials (SCMs) 707.4 Preformed Expansion Joint Filler 708.1.1 (Type 1), 708.1.2 Tie Bars 709.1 Water 715.7 Water Reducer 707.3 * The use of limestone will not be permitted.
Shipping and Storage of Cement: Cement shall be shipped from pretested and approved bins at the mill or other terminal locations. Cement stored by the Contractor for a period longer than 90 days shall be retested before being used in the work. Cement failing to meet any of the specif ied requirements at any time prior to incorporation into the work will be rejected and removed from the work. Cements of different types shall be stored separately.