Great Wall Machinery: How much slag powder mix in the concrete is best?

Concrete has now as the most important impact of structural materials and shape modern architecture. Currently the world's annual production of more than 10 billion tons of concrete material, in concrete, such as adding some active mineral admixtures can serve to replace part of the cement saving resource costs, reduce energy consumption and improve the performance of concrete action.

Chaeng(Great Wall Machinery) slag powder production line machinery manufacturers engineers introduce for us, fly ash and slag are active pozzolan admixture, and are made of industrial waste collection and processing, costs are significantly lower than cement. The chemical composition of fly ash and slag contain a large number of active SiO2 and Al2O3, in a humid environment chemically react with Ca (OH) 2 and other alkaline substances, generate hydrated calcium silicate, hydrated calcium aluminate and other plastic coagulation substance, can play a role to improve the concrete strength. Both materials are present in very small particle size of the particles beads, very small beads equivalent lively nanomaterials, the particles can improve the workability of concrete. Admixture of fine particles, mixing in concrete can significantly improve the cement particles play gap, increase the degree of compaction of the concrete characteristics. However, slag ash prices are high, with hydration alone hydraulic characteristics of fly ash in Portland cement only in the excitation intensity will have a role, should give full play to the preparation of concrete admixture characteristics, the strength, economy and workability of concrete can be guaranteed.

Most commodity concrete mixing stand in the production process even adopt a single doping method or not doped admixture adoption. So, this approach in the end right? How should admixture mixed, how much should the doping do?

To this end, Chaeng slag powder production line machinery manufacturer gives such a test: By not adding admixture of C30 concrete incorporating different proportions (replacement of cement mass percentage) of fly ash, slag, and the use of single-doped mixed methods or different dosage strength of concrete workability pilot study. The results show:

(1) adding a certain percentage of concrete admixtures to improve the workability of concrete, increases slump concrete slump and reduce losses, admixtures slightly more workability, wherein the fly ash to improve concrete workability better than ore.

(2) separate fly ash or slag, the early strength of slower growth, but late strength is relatively better able to meet the design strength requirements, and slag concrete and late strength of growth is faster than the fly ash .

(3) Use of Fly Ash and Mineral Powder method can effectively integrated the advantages of both, concrete slump higher than the proportion of single-Slag Cement content of concrete slump, compressive strength higher than single fly ash indicators, the most important indicator of concrete have been two reasonable improvement. When The test data analysis, the proportion of admixture of more than 45% by the late strength compared with reference concrete decreased, but the slump is higher, and the overall blending ratio of 30% to 40%, the strength and workability It had a good try.

Concrete as the most important civil engineering materials should also ensure its strength, economy and high workability, slag ash than the price, but they were lower than the price of cement. In order to improve the above properties of concrete, can be added to certain admixtures in the concrete to achieve. Chaeng slag powder production line machinery manufacturers to remind you: If you need to use low-grade concrete C30 in your project, the above ratio can be formulated using double mixture concrete!