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 The material shall permanently adhere to deteriorated concrete or bituminous pavement until the surrounding pavement fails. Removal shall not be required when the surface is overlaid with asphalt. The Administration reserves the right to sample composite material or mixture at any time. WACPM Job Mix Formula. The job mix formula shall establish a single percentage of aggregate passing each required sieve, a single percentage of binder to be added to the aggregate and a range of add water required to activate strength. Submit results of the proposed job mix formula to the Office of Materials Technology through the Engineer for approval. The report shall show that all materials were tested and meet the following. Aggregate Gradation Sieve Size Percent Passing 4.0mm (1/8”) 6.0mm (1/4”) 9.0mm (3/8”) 12.0mm (1/2”) 1/2” 100 100 100 95-100 3/8” 100 100 85-100 65-85 #4 90-98 80-100 35-60 38-60 #8 60-70 20-55 15-35 25-45 #16 40-57 12-32 14-25 10-20 #200 4-9 3-6 3-6 3-6 Job Mix Formula Analysis Test Test Designation Specification Limits Gradation T 30 Report Particle Coating T 195 >95% Asphalt Content T 308 5.0 – 9.0% Draindown T 305 <8%
924.03.01 Storage. CPM/WACPM furnished in bags or containers shall be stored in accordance
with the manufacturer’s recommendations. CPM/WACPM shall remain workable in storage for at least six months. CPM may also be furnished from stockpiled material that has been stored outside 924.03.02 Usage. CPM shall be uniformly mixed and require no mixing prior to use. The material shall be capable of being poured or shoveled into a hole. The material shall require minimal pothole preparation consisting of removing most of the water and debris as possible from the pothole. The material shall be capable of displacing any water remaining in the hole. The material shall be placed and compacted in accordance with the manufacturer’s recommendations. The material shall not ravel nor adhere to tires when opened to traffic. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
924.03.03 Quality Control Plan (QCP). Submit a Quality Control Plan (QCP) that includes the
following.
a.Description of Material.
b.Contact Personnel.
c.Safety Data Sheets (SDS). (d) Technical Data Sheets, including VOC content. (e) Job Mix Formula. (f) QC Material Sampling Process. (g) Storage Requirements. The QCP shall also state that if a test result indicates that a shipment is not in compliance with specifications, the following shall apply.
a.Immediately notify the Administration of the shipment in question.
b.Identify the material. (c) Cease shipment until material complies with specifications. (d) Notify the Administration prior to resuming shipment. (e) Implement any mutually agreed upon procedures for the disposition of the material. In the event a mutual agreement is not achieved, the Administration shall have final authority in the decision on specification compliance.
924.04 Certification
Provide certification that the material meets requirements as specified in TC-1.03 and the following.
a.A guarantee the material conforms to the Materials, Binder, Mix Performance and Storage requirements and COMAR environmental regulations.
b.Employ an unaffiliated AASHTO-accredited laboratory to perform all testing for certification. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS Acceptance testing will be completed on delivered material as determined. Each delivery shall be considered one lot. The material may be subject to a workability evaluation either in the lab or in the field. Non-conforming materials will be rejected whether in-place or not. Remove all CPM inventory on hand that fails to meet requirements and replace. Replacement Warranty. Material that does not remain workable in storage for at least six months shall be replaced. Product that does not perform in normal pothole patches for at least twelve months will be evaluated for performance. Material that consistently fails to meet requirements will be removed from the QPL. 925 — DETECTABLE WARNING SURFACE CATEGORY 900 MATERIALS SECTION 925 — DETECTABLE WARNING SURFACE
925.01 General
Detectable warning surfaces shall conform to the current accessibility guidelines of the Americans with Disabilities Act (ADA). The Office of Materials Technology (OMT) maintains a Qualified Products List (QPL). Manufacturers seeking inclusion of their product on the QPL shall submit certified test results showing conformance to the properties in 925.07, as well as installation instructions and the types of adhesives and sealants required.
925.02 Composition
Warning surfaces shall be either flexible or rigid. If there is a change in the composition of a qualified product, the manufacturer shall notify OMT and submit new test results showing conformance with 925.07.
925.02.01 Pavers. Type III Brick Pavers shall conform to the requirements of C 902, Class SX,
Type 1, and Application PX. The pavers shall be 2-1/4 in. x 4 in. x 8 in. with square edges and a surface meeting 925.03.
925.03 Configuration and Dimensions
The warning surface shall consist of a system of truncated domes having a base diameter of 0.9 in. to 1.4 in., a top diameter 50 percent to 65 percent of the base diameter, and a height of 0.2 in. The domes shall be arranged in a square grid with center to center spacing of 1.60 in. to 2.40 in.
925.04 Color
The color shall be homogeneous across the surface of the material and contrast with adjoining surfaces.
925.05 Identification
The top surface shall have an identifier that uniquely distinguishes the manufacturer. Brick pavers are excluded. 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
Source: Maryland Standard Specifications for Construction and Materials, 2025 Edition. Pages 1058–1061 of 1,113.