Applicable Specification. 2.1 The following specifications of this issue in effect on date of invitation to bid form a part of this Specification. Federal Specification V-M-81 (all documents referenced with the exception of Federal Standard 123 Military Specification). State of Rhode Island and Upholstered Furniture Laws 23-26-29 G.L. 1956.
Applicable Specification. Add the following to Clause 3.4.1: The maximum aggregate size shall be 26mm. The nominal stone size specified in the concrete grade shall mean stone conforming to SABS 1083 for the nearest equivalent size. Any aggregate may be used provided the free sodium alkali content in the concrete mix does not cause an alkali-aggregate reaction. Coarse aggregate may be obtained from the nearest available commercial sources, and shall be subject to the Engineer’s approval. Flakiness index of coarse aggregates when tested in accordance with SANS 5847 shall not exceed 35. Soundness to be tested in accordance with ASTMC33 and C88 (SANS 5839) coarse aggregates shall not show a loss in mass of more than 18% and fine aggregates not more than 15% after 5 cycles using magnesium sulphate. Shrinkage shall be determined in accordance with SANS 5836. The upper limits of shrinkage shall be: Fine aggregate : 150% of the shrinkage of the reference aggregate Coarse aggregate : 150% of the shrinkage of the reference aggregate The reference aggregate shall be defined by the Engineer. The volume of water required to mould the sample in accordance with SANS 5836 shall be reported with the above results. Fine aggregate may be obtained from local sources subject to testing of its suitability by an approved laboratory and approval by the Engineer. Aggregates shall be tested periodically for reactivity, and shrinkage, the costs of which shall be deemed included in the rate tendered for concrete. A trial design mix will have is to be prepared and the results submitted to the Engineer for approval before construction begins. At least one month before commencement of concrete work the Contractor shall supply at his own cost representative samples to the Engineer of the aggregates he intends using, together with certificates from an approved laboratory indicating that the aggregates comply with the specifications. Approximately 50 kg of each sample of aggregate shall be supplied. After approval, these samples shall be taken as standard for the agreed aggregates to be used in the Works. If at any time during the course of the Contract the Engineer considers that there has been any deviation from the approved standard the Contractor shall submit further tested samples of material to the Engineer for approval.
Applicable Specification. 2.1 The following specification, of the issue in effect on the date of the Invitation to bid, form a part of this specification.
