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SECTION B - Derry City Council

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APPENDIX 1/5: TESTING TO BE CARRIED OUT BY THE CONTRACTOR (CONTINUED)<br />

Clause Work, Goods or Materials Test Frequency of Testing Test Certificate Comments<br />

1702<br />

Water<br />

Tests specified in BS EN<br />

1704<br />

1008<br />

Monthly<br />

continu<br />

Chloride content<br />

Monthly<br />

ed<br />

Sulfate content<br />

Weekly<br />

Acid-soluble alkali<br />

content<br />

Admixtures Chloride content 1 per consignment Required<br />

(BS 934-2)<br />

Sulfate content<br />

Acid-soluble alkali<br />

content<br />

1 per consignment<br />

1 per consignment<br />

Required<br />

1707 Concrete Cube strength (N) Prestressed concretetwo<br />

cubes from 12 m³ or<br />

2 batches whichever<br />

represents the lesser<br />

volume<br />

Reinforced concrete –<br />

four cubes from 24 m³ or<br />

4 batches whichever<br />

represents the lesser<br />

volume but minimum of 4<br />

for every day concrete is<br />

delivered to site<br />

Mass concrete-two<br />

cubes from 50m³ or 50<br />

batches whichever<br />

represents the lesser<br />

volume<br />

Additional cubes for<br />

special purposes<br />

Required<br />

Contractor to cast and<br />

test sufficient additional<br />

cubes to demonstrate<br />

cube strength before<br />

transfer<br />

Cube strength-identity<br />

2 cubes from each of two<br />

testing as described in<br />

samples of each batch<br />

Appendix 17/4 (N)<br />

Density<br />

Modulus of elasticity<br />

Fresh concrete<br />

Consistence (slump or<br />

Each batch<br />

Required<br />

compacting factor or<br />

Vebe) (N)<br />

Air content<br />

Each batch<br />

Cement content<br />

Water/cement ratio<br />

1709 Silane Required for each<br />

delivery<br />

Refractive Index<br />

Three samples<br />

Certification that the<br />

silane complies with<br />

Clause 1709 is required<br />

Trial panels, where<br />

required in the Contract<br />

143

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