General requirements

031312 Aggregate

FINE AGGREGATES: Shall be natural or crushed gravel or stone, clean sharp coarse grit, pit or river sand to conform with the requirements or ES C. D3. 201 for concrete aggregates.
COARSE AGGREGATE: Shall be hard clean gravel or broken stones, durable, non-porous and free from harmful matter. It shall conform to the requirement of ES.C. D3. 201.
Aggregate for lightweight concrete shall confirm to the requirements of ASTM 330.
Samples of concrete aggregate materials shall be submitted for testing at least two weeks before bulk deliveries of aggregates are made. No deliveries in bulk shall be commenced until samples are approved.
Rejected samples shall be removed from the site within 24 hours.
Aggregates shall be obtained from an approved source. Samples of aggregates shall be supplied for approval, and when approved, further deliveries shall conform to the approved samples. Any material considered to be inferior to the approved samples shall be condemned and removed from the site. Aggregate shall be washed as often as required to make it conform to this Specification.
Fine and coarse aggregates shall be regarded as separate ingredient if not delivered like wise. Where more than one sizes of aggregate are combined with concrete mix, such proportion of combination shall confirm to the appropriate grading as established by tests or as directed by the Engineer.
031313 Water

Water for concrete shall confirm to the requirements of ASTM C94.

Water shall be from an approved source and shall be clean, free from oil, acid, alkali, or any vegetable or organic matter harmful to any material with which it is used.
If available drinking water piped supply shall be used.