IS 2645-1975

标准号：IS 2645-1975
发布日期：1975/7/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This standard covers the requirements for integral cement water-proofing compounds which shall be assessed by:a) the permeability to water of standard cylindrical specimens made from cement-sand mortars with and without the addition of the waterproofing compound under test, by measuring the percolation of water, through standard cylindrical specimens, andb) the physical tests of setting time and compressive strengths of cement mixed with the recommended proportions of the water-proofing compounds by comparing with similar tests on the same cement without the addition of the compounds. — Integral cement waterproofing compounds shall be used in such proportions as recommended by manufacturers but not exceeding 3 percent by weight of cement.Note 2 — For purposes of 1.1 and other requirements in this specification, cement shall mean ordinary Portland cement conforming to IS: 269-1967〓. By agreement between the purchaser and the supplier, testing of waterproofing compound may be done with Portland blastfurnace slag cement or Portland pozzolana cement conform-ing to IS: 455-1967〓 and IS: 1489-1967§ respectively.