对于混凝土集料，影响配合比组成变异而导致混凝土强度波动过大的主要原因是

Aggregate for concrete, composition of mixture ratio variation and impact strength of concrete is mainly due to excessive fluctuations in water content, clay content and change the amount of powder containing stones. In the concrete production process, quality control of raw materials, foreign detect regular, also requires quality control personnel keep abreast of changes of its content, and to develop appropriate countermeasures. For example when the clay content of the sand beyond the standard requirements, the importance of timely feedback to the production sector, to take timely and effective measures to screen out the other to ensure the quality of concrete. Sand moisture content, by Fried method, to adjust the actual amount of water in the concrete mix and the aggregate amount in accordance with the actual moisture content of the assay. Activity for the variability in the cement between the same reference numerals, and rapid determination is carried out by a mortar strength test, to be adjusted according to the mixing ratio of cement concrete activity results.

For concrete aggregates, the main reasons for the excessive fluctuation of concrete strength due to the variation of the composition of the combination are the moisture content, the change of mud content and the powder content of the stone. In the concrete production process, the quality control of raw materials, regular testing, also requires quality control personnel to keep abreast of the change severity of their content, and work out the corresponding countermeasures. For example, when the mud content of sand exceeds the standard requirements, timely feedback must be given to the production department, timely take and screen out other effective measures to ensure the quality of concrete. The water content of the sand, through dry frying method, timely adjust the concrete fit ratio and the actual aggregate amount according to the measured water content. For the variation of cement activity between the same labels, the fit ratio of concrete is adjusted according to the results of cement activity.

For concrete aggregate, the main reasons that influence the variation of mix proportion and cause the excessive fluctuation of concrete strength are the change of water content, mud content and stone powder content. In the process of concrete production, in addition to the quality control and regular inspection of raw materials, the quality control personnel are required to master the change rule of its content at any time and formulate corresponding countermeasures. For example, when the silt content of sand exceeds the standard requirements, it must be fed back to the production department in time, and other effective measures to ensure the quality of concrete must be taken and screened out in time. The moisture content of sand shall be adjusted according to the measured moisture content in time by dry stir method. For the variation of cement activity between the same grade, it is a rapid measurement through the strength test of mortar, and the mix proportion of concrete is adjusted according to the result of cement activity.<br>