General requirements

0423 QUALITY ASSURANCE
04231 Standards

Comply with the following standards.

BS1232 Natural stone for building, BS

ES CD4 001 Solid clay bricks, ESI

ES CD4 026 Hollow clay bricks, ESI

ES CD3 301 Concrete hollow blocks, ESI

ES CD5 201 General requirements, Portland cement, ESI.

ES CD5 003 Hydrated lime, ESI

BS 1200 Sand for mortar for plain and reinforced brick work; brick walling & masonry, BS.

ASTM C94 Mixing water for concrete

04232 Qualification of Workmen

Generally comply with the requirements of qualification of workmen in the general requirements of this Specification. In addition to these requirements, assign at least one person for each type of masonry work who is thoroughly familiar with the specified requirements and capable of guiding the tradesmen in the selection of materials and execution of the work of this section.

04233 Submittals
042331 Product data

Submit product data for approval by the Engineer immediately after signature of contract, indicating the source of cement, lime, aggregate, stone, brick & blocks and manufacturers certificate showing properties of cement and lime. Samples of stone not less than half percent of the consignment and not smaller than 450mm long to show all natural variations such as colour, texture and specified finishes shall be submitted to determine suitability and approval by the Engineer.

Submit samples of brick & block not less than one per thousand of each type of brick & block consignments. The samples shall show colour, texture, evenness of edges and accuracy of dimensions to determine suitability and approval by the Engineer.
Rejected samples shall be removed off site immediately upon receipt of such instruction by the Engineer.
042332 Submit manufacturers' test certificates with the consignment or as directed by the Engineer for cement and lime and factory produced brick and blocks.
Carry outs tests for bricks & blocks when no certificate is available to verify their compliance to the required standards.
A minimum of six bricks or blocks from each type shall be tested from each consignment of not more than 4000 or a minimum of six blocks per 4000 for site produced blocks. Samples shall be selected at random from the consignment delivered or those produced on site.