Standard for concrete works of Zhongtian Seventh Construction Co., Ltd
Select competent commercial concrete suppliers according to the project scale, and inspect their qualifications and production capacity. 2 1.2 Before concrete supply, the supplier shall submit the required grade mix proportion, and the material can be supplied only after the mix proportion is verified to be correct. After the concrete arrives at the site, the slump of the formwork shall be checked by batch. The slump of high-rise residential buildings shall not be greater than 180mm, and that of multi-storey residential buildings shall not be greater than 150mm. During concrete pouring, concrete compression and impermeability test blocks shall be made as required.
