CATEGORY 900 MATERIALS SECTION 922 — PREFABRICATED EDGE DRAINS
922.01 Certification
The manufacturer shall furnish certification as specified in TC-1.03.
922.02 Prefabricated Edge Drains
Shall be flexible, rectangular conduit consisting of supporting drainage core encased in a geotextile. Drainage Core. Material shall be manufactured from polymers having a high resistance to deterioration by pavement deicing salts, petroleum-based materials, and naturally occurring soil chemicals. The core shall have sufficient flexibility to withstand bending and handling without damage or significant weakening. The core geotextile contact point spacing for post and cuspated sheet type cores shall not exceed 1.125 in. Elongated pipe core sections shall have a 7.5 in./ft minimum open area to allow lateral flow into the core. Cores with support on only one side shall have a minimum of 5 percent of the area of that support side in unobstructed flow. Drainage core shall meet the following requirements: TEST PROPERTY TEST METHOD SPECIFICATION LIMITS Thickness, in. min — 0.75 Compressive Strength, psi, @ 20% maximum deformation, min (a) 40 In-plane Flow Rate, gal/min/ft of width, min D4716 (b) 15
a.D5034 for crushed sheet and post type cores. D2412 for elongated pipe type cores. (b) 10 psi load after 100 hr at a hydraulic gradient of 0.1 Geotextile Wrap. Section 919, Class SD, Type II. The fabric shall be bonded to contact points of supporting core for post and cuspated sheet type cores to ensure that the geotextile does not sag into the core flow area. The geotextile shall be tightly stretched over the core for elongated pipe type cores. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
922.03 Fittings
to withstand construction handling and permanent loading. All fittings shall be as approved.
922.04 Outlet Pipe
Pipe for outlets shall be 6 in. minimum diameter and meet Section 905. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Fittings for the pavement edge drain systems, including, but not limited to end seals, splices, outlets, and shunts shall meet the manufacturer’s recommendations and be of sufficient strength 923 — SLURRY SEAL AND MICRO-SURFACING 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
Source: Maryland Standard Specifications for Construction and Materials, 2025 Edition. Pages 1054–1055 of 1,113.