826LOCAL SAND AND SAND-GRAVEL FOR

695

LOCAL SAND AND SAND-GRAVEL FOR MISCELLANEOUS CONSTRUCTION USE

826.01Description

Local materials, for the purpose of these Specifications, shall be of the kind and character of local sand and local sand-gravel or blends thereof.

826.02General Requirements

The kind of material shall meet the general requirements for the respective classification of material as noted in this Article. Blends shall consist of any combinations of local sand or sands, or local sand-gravel, or sand-gravels. All blends shall be of the material proportions or ratio provided by the plans and/or proposal. When used in bituminous pavements, local source material shall be non-plastic.

Local sand shall be pit-run sand suitable for the purpose intended. In general, all local sand shall consist of grains of hard, sound material, predominantly quartz or other hard, durable rock, including friable, loosely bound deposits of sandstone conglomerate. The sand shall be free from a coating of injurious material, lumps of clay, loam, organic matter, or other foreign material. If necessary, gradation and/or other requirements will be provided in the plans and/or proposal form.

Local sand-gravel shall be pit-run sand-gravel, suitable for the purpose intended. In general, the sand-gravel shall be hard, sound durable rock, including friable, loosely bound sandstone conglomerate, with varying amounts of coarse aggregate and sand. The coarse aggregate and the sand shall be free from a coating of injurious material, lumps of clay, loam, organic matter, or other foreign material. If necessary, gradation and/or other requirements will be provided in the plans and/or proposal form. PROCESSED REEF SHELL

827.01Description

Processed Reef Shell shall consist of dead reef shells (oyster, clam, or other dead shell as encountered in the reef) but not cannery or live shell. Processing shall consist of washing the shell by the use of a screen washer, the mesh of which shall not be smaller than 1/4 of an inch {7 mm}. The processed shell shall be classified as a commercial aggregate.

827.02Processed Shell For Soil Or Aggregate Base Courses

Processed shell used in base courses shall, after processing, not contain foreign matter in excess of three percent when washed over a No. 200 {75 µm} sieve of the dry weight {mass} of the shell.

827.03Processed Shell For Bituminous Bases and Pavements

Processed shell used in bituminous work shall in addition to the requirements noted in Articles

and 827.02 require the oversize fraction to be crushed in a mechanical crusher and rescreened