The,details,added,micro-silica business, insurance The details of added micro-silica fume to the ground floor c

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Ifimproper operation will affect the quality of the products, also affect thecost, human and material resources, and more at the same time!Micro-silica fume added industrial floorconcrete should pay attention to what the details? Micro-silica fume’s color isbetween light gray and dark gray, the density of the about 2. 2g/cm3 lighter than cement. The silicon powder particlesis very small, the cement particles have an average diameter of only 1/100. Thephysical properties of silica fume determines tiny particles of silica fume hasa high degree of dispersion, and can be sufficiently filled in between thecement particles, increase the density in the slurry after hardening.1, Although the micro-silica fume canimprove the performance of the new mixing hardened concrete, but if improperlycan also cause the quality of the accident, so in the process of using weshould pay attention to the following details: 1. Due to the particle size ofmicro-silica fume, large surface area and high water demand, so while add microsilica fume to the concrete mixed, it should combined with superplasticizer toachieve good results. 2. the method of micro-silica fume add to concrete includingwithin the mixed method and without mixed method. Within the mixed method toreduce the amount of cement, therefore the law is generally used in low gradeconcrete; Mixed method does not reduce the amount of cement generally used forhigh-grade concrete. 3 in concrete,the micro silicon powder dosage should not be too high or too low, it generallyuse about 5% to 10%, the beneficial effect of this range of micro-silica fumeplay the best, that is not only micro-silica fume instead of cement play thebest, the excellent performance into full play, and avoid adverse effects, if thecontent of micro-silica fume is greater than 15%, lower frost resistance ofconcrete. 4. due to the high consistency of micro-silica fume concrete, in thedesign of concrete slump should be larger than ordinary concrete about 2 ~~ 3cm. 5. micro-silica fume concretemixing time should be longer than the ordinary concrete about 0.5 to 1min, inorder to make the concrete more uniform mixing to prevent micro silica fume inconcrete into the group caused by the quality of the accident. 6. Mixed withmicro-silica fume concrete, we must strengthen the early conservation, preventconcrete plastic shrinkage cracks.2, Best conditions of micro silica fume inthe cement paste and concrete: In order to make more effective use ofmicro-silica fume and improved microstructure of hardened cement paste, many metalpowder suppliers conduct more detailed studies about the bestconditions of micro-silica fume cement paste and concrete, researches in thisarea, including water-cement ratio, silica fume dosage, admixtures and othervolcanic ash admixture choose and its amount. There is an optimal water-cementratio range of micro-silica fume in the cement paste and concrete applications,generally beyond the scope of micro-silica fume will reduce the improvement ofhardened cement paste and concrete microstructure.Micro-silica fume can effectively improvethe hardened cement paste and concrete micro-structure, but due to the smallparticle size of the silica fume, large specific surface area, so after theincorporation of micro-silica fume silica fume cement paste and concrete withsilica fume doped The increase in the amount of water demand increases, and thecontraction also increases. Therefore, the micro-silica fume dosage generallylimited to between 5% to 10%, and to regulate the water demandsuperplasticizer, at the same time, there is a compatibility problem betweenthe cement, micro silica fume admixture, therefore must pay attention to theapplication conditions, the use of micro-silica fume. Concrete mixed withmicro-silica fume silica fume may result from the contraction of the concreteand concrete generally is mixed with silica fume concrete with specialrequirements, therefore, the use of micro-silica fume concrete hardened cementpaste and the beneficial effect of the concrete performance, we must minimizethe adverse effects of micro-silica fume silica fume at the same time, the mosteffective way to solve this problem is mixed with silica fume admixture otherpozzolanic materials or other substances, so They learn from each other toimprove the technical and economic effect. Currently, more research is using ofsuperfine slag and micro-silica fume complex doped, or the use of fly ash andmicro silica fume complex doped.Source:http://www.mhcmp.com