1.Strengthen raw material control
Concrete is basically by cement, water, aggregate, admixture and admixture and other substances through reasonable collocation mixing mix. Therefore, to control the strength of concrete, mainly from the raw materials to control, cement should choose the appropriate variety of cement and grade; Water should be in the water quality test and corrosion resistance test qualified, used for mixing concrete, generally speaking, sewage, industrial waste water can not be used for mixing all kinds of concrete; Fine aggregate should focus on the inspection of its texture, particle grading, fineness modulus, mud content and harmful substance content; Coarse aggregate should focus on checking its crushing index value, gradation, needle flake particle content, mud content, mud block content and maximum particle size; The admixture should be selected according to the performance of fly ash. Admixture should check the production license of admixture manufacturer above all, quality assurance material and the testing unit that have corresponding qualification issue performance test report, it is to ensure that concrete admixture and the cement used in the project are suitable next, finally it is to strictly control the dosage of admixture, meet the construction requirements.
2.Control the construction quality of concrete
In control of concrete mixing process, the key to control is the quality of the concrete, before pouring, we will strictly control the collocation of all kinds of raw material ratio, reasonable and scientific, prohibited to add materials, the concrete mixing time and sequence of feeding, the slump of concrete mixture, such as whether segregation to spot check, In the process of construction, the standard operation of support and formwork will also affect the strength of concrete, and strengthen the organization and management to ensure that the quality of concrete meets the construction requirements.
