Concrete and Cement Sample Clauses

Concrete and Cement. 2.2.1 Aggregate Gradation Analysis (ASTM C136, TEX-200-F) ................................. $ 75.00/ea 2.2.2 Specific Gravity of Aggregate (ASTM C127, C128)............................................. $ 75.00/ea 2.2.3 Absorption of Aggregate (ASTM C127, C128) ..................................................... $ 75.00/ea
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Concrete and Cement. 1. Pre-cast concrete shall be fully cured before placing it in a location that may contact surface waters. 2. When poured concrete is used, the work site shall be isolated from flowing or standing water via diversion dams. Flow shall be excluded from poured concrete for ≥ 30 days after it is poured. During that time, the poured concrete shall be kept moist, and runoff from wetting shall not be allowed to contact or enter the wetted channel. a. Commercial sealants may be applied to the poured concrete surface to shorten the time over which water must be effectively diverted around the site. MRC‟s representative must advise the Department in the subnotification of intent to use a sealant. The subnotification must include a copy of the manufacturer‟s guidance regarding the drying/curing time necessary to avoid water quality and fish and wildlife impacts, and a commitment by MRC to meet or exceed those requirements. b. While poured concrete is curing, the diversion shall be inspected at least daily to assure that it continues to bypass maximum flow (e.g., siphon is not lost, the temporary barrier is not at risk of being overtopped [including consideration of weather forecasts], nor its integrity compromised). Note: Because of the toxicity of uncured concrete in aquatic systems, the temporary barrier and bypass system must be maximally effective. c. While poured concrete is curing, MRC shall keep a record of daily surface water pH immediately upstream of the diversion and downstream of the diversion outlet. If pH downstream is more than 1.0 unit different than water immediately upstream of the work area, MRC shall take immediate action to further reduce through-flow or underflow of the flow diversion and shall contact the Department within 24 hours. The log shall be made available to the Department upon request.

Related to Concrete and Cement

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  • Drainage Systems (1) Clear culvert inlets, outlets, and sediment catching basins. (2) Maintain waterbars, drainage dips, and other water diversion measures. (3) During active use, patrol and maintain functional drainage. (4) Repair damaged culvert ends.

  • Grading The coarse aggregate as delivered to the mixer, shall be well graded as per IS specifications. Maximum size of aggregate used for the work shall be 20mm or 40mm or as specified in items in the bill of quantities and it shall confirm to IS: 383-1970, clause 4.2 (Table-2) However, the exact gradation required to produce a dense concrete of specified strength and desired workability shall be decided as per laboratory test by the Engineer. Coarse aggregate for use in concrete shall be well graded and shall conform to IS: 383-1970 requirements (as per Table-II) given below: 63mm 100 - - - 40mm 00-000 000 - - 20mm 00-00 00-000 100 - 16mm - - 00-000 000 12.5 - - - 90-100 10.00 00-00 00-00 00-00 00-00 4.75mm 0-5 0-10 0-10 0-10

  • Fabrication Making up data or results and recording or reporting them.

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  • Structures Airport facilities such as bridges; culverts; catch basins, inlets, retaining walls, cribbing; storm and sanitary sewer lines; water lines; underdrains; electrical ducts, manholes, handholes, lighting fixtures and bases; transformers; flexible and rigid pavements; navigational aids; buildings; vaults; and, other manmade features of the airport that may be encountered in the work and not otherwise classified herein. 10-50 SUBGRADE. The soil which forms the pavement foundation.

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