2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 900 MATERIALS SECTION 927 — OPEN GRADED FRICTION COURSE MIX Open Graded Friction Course (OGFC) shall conform to the applicable sections of 901 and PP 77, except as specified. GRADATION: *Mix Control Tolerance not applicable to this sieve for this mix.
a.Less than Design Level 4 (ESAL).
b.Porous European Mix (PEM) – Design Level 4 (ESAL). (c) Conduct drain-down test on loose mix at a temperature 15 C higher than anticipated production temperature. Crushed glass, roofing shingles, RAP, or other recycled materials are not allowed in OGFC mixes. PHYSICAL PROPERTIES: TEST TEST METHOD LIMITS Asphalt Bindera M 332 64E-22 Tensile Strength Ratio (TSR) T 283b ≥85% Permeabilityc MSMT 408 300 ft/day (100m/day)
a.Mineral Fibers used at 0.4% of total mix, Cellulose, 0.3% of total mix, or other approved stabilizer systems as specified in 904.05.04. Design Gradation Limits, % Passing Sieve Size Mixture Control Tolerance, % 9.5 mm OGFCa 12.5 mm OGFCa 12.5 mm PEMb 3/4 in. (19 mm) ±0.0 100* 100* 1/2 in. (12.5 mm) ±6.0 100* 85-100 80-100 3/8 in. (9.5 mm) ±5.5 85-100 55-75 35-60 No. 4 (4.75 mm) ±6.0 20-40 15-25 10-25 No. 8 (2.36 mm) ±4.5 5-10 5-10 5-10 No. 200 (75 µm) ±2.0 2-4 2-4 1-4 Range for % AC ±0.4 6.0-7.25 5.75-7.25 5.5-7.0 Drain-down (D6390), %c <0.3 <0.3 <0.3 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
b.Tensile Strength Ratio using T 283 with the following exceptions:
1.Compact using 50 gyrations of a Superpave gyratory compactor.
2.Apply partial vacuum of 26 in. (660 mm) Hg for 10 minutes to whatever saturation level is achieved.
3.Use five freeze/thaw cycles, keeping the specimens submerged in water during the freeze cycles.
c.Permeability is required when material is to be used in Porous Asphalt Pavement Systems. 930 — PRICE ADJUSTMENT FOR STEEL CATEGORY 900 MATERIALS SECTION 930 — PRICE ADJUSTMENT FOR STEEL
930.01 Price Adjustment for Steel
930.01.01 General. A Price Adjustment (PA) may be made to provide additional compensation
to the Contractor or a credit to the Administration for the fluctuation in the raw material cost of Steel Products used on specific items of work identified in the Contract according to this provision. The master list of standard Pay Items, which the Department has determined are eligible for PA will be posted on the SHA website (www.roads.maryland.gov). The PA only applies to projects for which a Price Adjustment for Steel item is included in the Schedule of Prices. When the item is included in the Contract, the Contractor has the option to opt in or opt out of this specification. The Bidder may choose to have PA applied to any, all, or none of the eligible items shown on form OOC123. Materials purchased by the Contractor and/or the Supplier prior to bid opening, from the list of eligible items, are specifically excluded for consideration.
a.If the Contractor chooses to opt in, the Contractor must submit a Contractor Opt-In Form OOC123 and cover letter, on Contractors letterhead, to the OOC & a copy to the District Engineer no later than 15 calendar days after the date of the Notice of Award. No price adjustments will be considered if the Contractor fails to submit the required information within that time period.
b.This PA applies only to Items that are listed as adjustable in the contract bid items. The PA does not apply to changes in the cost of manufacturing, fabrication, shipping, storage, or any cost other than material.
c.This PA applies only to material cost changes that occur between the dates of the project bid opening by the Administration and the purchase date(s) of the material.
d.The Contractor shall submit the material cost information and all necessary documentation to the District for review. If a PA is necessitated, it will be made on the next estimate.
930.01.02 Price Adjustment Determinations. The PA will be made when there is an increase or
decrease of five percent or greater in the price listed in the AAM from Bid Opening Month to the Purchase Date Month. A maximum increase or decrease of 100 percent is permitted. The PA is applied only for a cost increase or decrease which is five percent or greater, and to a maximum of 100 percent.
a.Steel Prices. The Administration will maintain a monthly adjustment index using data obtained from the American Metals Market (AMM). The posted price will be 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS
Source: Maryland Standard Specifications for Construction and Materials, 2025 Edition. Pages 1067–1068 of 1,113.