CATEGORY 900 MATERIALS SECTION 923 — SLURRY SEAL AND MICRO-SURFACING
923.01 Aggregates
Aggregates shall be crushed stone, compatible with the emulsion, and meet the gradation requirements in D3910 or D6372. Aggregates shall also meet the physical requirements for Slurry Seal (SS) and Micro-Surfacing (MS) in Table 901 D.
923.02 Mineral Filler
901.01.
923.03 Water
921.01.
923.04 Emulsified Asphalt
Emulsified asphalt shall be neat or polymer modified. The polymer shall be milled or blended into the asphalt or emulsifier solution prior to the emulsification process. The polymer modified emulsion shall contain 3.0 percent polymer solids minimum by weight of asphalt. The emulsified asphalt shall meet M 208, Grade CSS-1h or CQS-1h. Each load of emulsified asphalt shall be accompanied by a Certificate of Analysis/Compliance that indicates the emulsion meets specification requirements.
923.05 Mix Design Approval
Submit mix design data for approval at least three weeks in advance of the paving operation. Include the following:
a.Source, percentage, and grade of emulsified asphalt.
b.Source, gradation and proportion of each component aggregate. (c) Source and percentage of additional additives. (d) Target gradation and residual asphalt content of mix. (e) Mix design worksheets. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Test the mix design in accordance with D3910 or D6372. The mix design report shall show that the test results meet the following: Slurry Seal TEST PROPERTY TEST METHOD SPECIFICATION LIMITS Consistency Test (Mix Time), 77F, s, maximum D3910 180 Set Time, 77F, m, minimum D3910 15 Wet Track Abrasion, g/ft2, max One-hour soak *ISSA TB-100 75 Residual Asphalt: Type II T 164 or T 308 7.5% – 13.5% Type III T 164 or T 308 6.5% – 12.0% Micro-Surfacing *International Slurry Seal Association 5.5% – 10.5% T 164 or T 308 50 *ISSA TB-100 , maximum 30 D6372 LIMITS SPECIFICATION METHOD TEST 1044TEST PROPERTY Set Time 77F s, minimum Wet Track Abrasion, g/ft2 One-hour soak Residual Asphalt (by dry weight of aggregates): Type II or Type III 924 — COLD PATCH MATERIAL CATEGORY 900 MATERIALS SECTION 924 — COLD PATCH MATERIAL
924.01 Description
Cold Patch Materials (CPM), including Water-Activated Cold Patch Material (WACPM), are high performance asphalt patching materials used to repair potholes, deteriorated concrete, and asphalt pavement in all seasons. The material shall be capable of making permanent repairs with minimal effort and with minimal disruption to traffic. CPM/WACPM are produced by approved manufacturers using specially formulated binders. The CPM material may be produced in bulk and stockpiled or packaged in buckets or bags weighing 40 lb to 50 lb, or packaged as approved. The WACPM is produced and packaged in buckets or bags weighing 35 lb to 60 lb. Select from the Qualified Products List (QPL).
924.02 Materials
Aggregate M 29 T 11 T 2 Binder D244 D402 T 59 T 78
924.02.01 Binder. Binder shall provide aggregate coverage according to TP 40. No additives,
modifiers, or extra ingredients may be introduced into the liquid oil blend after shipment. Binder shall meet a maximum of 0.1 percent volume by weight of the original sample when tested to 500 F (260 C) according to T 59 or, the binder shall contain no more than 6.0 milliliters of oil distillate when tested according to D244, D402 or T 78, depending on the type of binder used. The residual binder content shall be approximately 5 percent to 9 percent of the mix.
924.03 Mix Performance Requirements
Cold Patch Material patches shall remain in place when paved over and shall not adversely affect the final surface. The material shall not require primer or tack and shall be compatible with asphalt and/or concrete at a minimum thickness of 1/2 in. The material must be capable of filling potholes in wet or dry conditions in ambient temperatures as low as to 5 F and up to 100 F. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
Source: Maryland Standard Specifications for Construction and Materials, 2025 Edition. Pages 1056–1057 of 1,113.