PERCENT PASSING GRADATION CHART FOR 3/4 inch {19 mm} MAXIMUM SIZE AGGREGATE Maximum Density Line 75 150 300 600 1.18um 2.36 4.75 9.5mm 12.5 19.0 25.0 37.5 500 Maximum Control Points Minimum Control Points 0 200 100 50 30 16 8 4 3/8 1/2 3/4 1 1 1/2 2No. In. Sieve Size to the 0.45 Power PERCENT PASSING GRADATION CHART FOR 1/2 inch {12.5 mm} MAXIMUM SIZE AGGREGATE Maximum Density Line 75 150 300 600 1.18um 2.36 4.75 9.5mm 12.5 19.0 25.0 37.5 500 Maximum Control Points Minimum Control Points 0 200 100 50 30 16 8 4 3/8 1/2 3/4 1 1 1/2 2No. In. Sieve Size to the 0.45 Power
424.04 Construction Requirements.
a.General. The mixing temperature of the asphalt mixture shall not exceed 350 F {177 C}.
c.Base Layer. The construction requirements for base layers shall be as specified in Articles 410.03 through 410.07, except as follows: The edges shall be trimmed immediately after final rolling, using an accurately aligned string or wire, to a tolerance of 2 inches {50 mm} outside the theoretical edge of the layer and to a slope not flatter than 1:1. Any edge distorted by rolling shall be promptly corrected.
d.Preparation of Mixtures - Moisture Content. Each time an asphalt content measurement is made (ALDOT-354 or AASHTO T 308), the amount of moisture in the mixture shall be determined, regardless of aggregate type, as specified in ALDOT-130 and reported on Form BMT-20. The moisture determination shall be used in computing the corrected asphalt content. Moisture samples shall be taken with the asphalt content samples from the loaded truck. Moisture in the mixture shall not exceed 0.20% by weight {mass}.
e.Production Tolerances. All mixtures furnished for use shall conform to the approved job mix formula (JMF) within the tolerances set in Article 410.02. Mixture gradations may be produced provided the gradations are within the tolerances.
424.05 Method of Measurement.
The accepted quantities of Superpave Bituminous Concrete Wearing Surface Layer, Superpave Bituminous Concrete Binder Layer, and Superpave Bituminous Concrete Base Layer will be measured as provided in Article 410.08, subject to any exceptions contained herein.
424.06 Basis of Payment.
a.Unit Price Coverage. Superpave Bituminous Concrete Wearing Surface Layer, Superpave Bituminous Concrete Binder Layer, and Superpave Bituminous Concrete Base Layer will be paid for at the contract unit price bid in accordance with Article 410.09, subject to any exceptions contained herein. PERCENT PASSING GRADATION CHART FOR 3/8 inch {9.5 mm} MAXIMUM SIZE AGGREGATE Maximum Density Line 75 150 300 600 1.18um 2.36 4.75 9.5mm 12.5 19.0 25.0 37.5 500 Maximum Control Points Minimum Control Points 0 200 100 50 30 16 8 4 3/8 1/2 3/4 1 1 1/2 2No. In. Sieve Size to the 0.45 Power SECTION 428 SCORING BITUMINOUS PAVEMENT SURFACE
b.Payment will be made under Item No.: 424-A Superpave Bituminous Concrete Wearing Surface Layer, ** , *** Maximum Aggregate Size Mix, ESAL Range **** - per ton {metric ton} 424-B Superpave Bituminous Concrete * Binder Layer, ** , *** Maximum Aggregate Size Mix, ESAL Range **** - per ton {metric ton} 424-C Superpave Bituminous Concrete Base Layer, ** , *** Maximum Aggregate Size Mix, ESAL Range **** - per ton {metric ton} * Specify either “Upper” or “Lower”. ** Specify "Patching", "Leveling", "Widening", etc. only when required. *** Specify Maximum Aggregate Size: 3/8", 1/2", 3/4", 1", or 1.5" {9.5 mm, 12.5 mm, 19.0 mm, 25.0 mm, or 37.5 mm}. **** Specify “A/B”, “C/D”, or “E”. SECTION 428 SCORING BITUMINOUS PAVEMENT SURFACE
428.01 Description.
This Section shall cover the work of scoring bituminous plant mix pavement surfaces at locations shown on the plans or directed by the Engineer. The scoring shall consist of cutting grooves, at regular intervals in the shoulder pavement surface.
428.02 Materials.
N/A
428.03 Construction Requirements.
a.General. It is intended that areas of the pavement surface designated by the plans or by the Engineer to be scored shall be so done as to produce a rumble strip effect to alert inattentive drivers. The size, shape, and spacing of the grooves formed during the cutting procedure shall be as shown on the plans unless a different configuration is approved by the Construction Engineer. Unless ordered otherwise by the Engineer, all grooves shall be perpendicular to the pavement edge.
b.Equipment. The scoring equipment shall consist of a rotary type cutting head with cutting tips arranged in a pattern that will provide a smooth cut. The cutting head shall be on its own independent suspension from that of the power unit to allow the tool to align with the slope of the shoulder and any irregularities in the shoulder surface.
c.Operational Requirements. The equipment shall be operated in a workmanlike manner that will satisfactorily produce a pavement surface having uniform grooves of the dimensions and spacing as shown on the plans or specified in this Article. Equipment used to construct scored shoulders shall be positioned by using methods which will avoid scoring at locations other than those designated on the plans or directed by the Engineer. The debris that results from cutting shall be removed on a daily basis by a sweeper/vacuum or other approved methods.
428.04 Method of Measurement.
The scoring of bituminous pavement surface ordered and accepted will be measured per mile {kilometer} along the centerline of each row of grooves placed either by direct measurement and computation to the nearest 0.001 mile {0.001 kilometer} or by odometer to the nearest 0.001 mile {0.001 kilometer}. When more than one row of grooves is required on a surface, each row will be measured separately. The length of scoring measured will include any gaps shown on the plans as part of the design of the scoring but will not include the length of any other gap or section omitted by the Engineer.
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Source: 2026 Standard Specifications for Highway Construction, 2026 Edition. Pages 250–252 of 826. View official source ↗