(1) the concrete rich intensity control in a reasonable range
In the concrete mix design, should retain moderate rich strength, should take into account the impact of unreasonable construction workers on the strength of concrete, for example, if the early maintenance is poor, the strength of concrete will be 10% ~ 20% lower than the standard strength.
(2) Pay close attention to the fluctuation of raw material quality
At the time of the mix test, the raw material is fixed and does not change. However, in the process of concrete production, the raw materials change constantly, sand water content, mud content, crushing value, fineness modulus and sand origin change will affect the strength of concrete; Water requirement (fluidity) and activity fluctuation of mineral admixtures; The strength of cement fluctuation, in the case of constant water glue ratio, cement strength is high concrete strength is high, cement strength is low concrete strength will also reduce; The fluctuation of admixture and cement adaptability directly affects the water reduction effect of admixture.
(3) Pay attention to production process control
Strictly control the concrete condition in the production process, find out the reason in time when there is change, and stop production if necessary. In the process of production, the workability of concrete mixture is often adjusted by simply adding and subtracting water according to the state of concrete mixture. Slump degree is partial hour, increase water consumption to ensure concrete slump degree is very common phenomenon, directly cause concrete actual water glue ratio becomes larger, intensity decreases. Concrete production, to strengthen process control, timely discovery of problems, timely search for reasons, timely treatment.
(4) Do a good job of technical disclosure
Commercial concrete enterprise technical personnel should combine engineering position, intensity grade, climate environment and other factors to the construction unit for technical disclosure, inform concrete suitable construction time, initial, final coagulative time, pouring operation, and timely communication, feedback information, so as to adjust the plan.
