Section 100: Mixing and pouring of concrete

The employer shall ensure at a construction site of a building or other construction work that,-

(a) the concrete mixture does not contain any material which may unduly affect the setting of such concrete, weaken such concrete or corrode steel used with such concrete;

(b) when dry ingredients of concrete are being mixed in confined spaces such as silos,-

(i) the dust shall be exhausted at the time of such mixing; and

(ii) in case the dust cannot be exhausted, as specified in sub-clause (i) the building workers shall wear respirators at the time of such mixing;

(c) when concrete is being tipped from buckets, building workers are kept out of the range of any kickbacks of such buckets: and

(d) loads are not dumped or placed on settling concrete.