Fuzhou is analysed the application and features of expansive agent

A fuzhou expansion agent can be caused by physical and chemical reaction volume expansion of the material, its volume expansion can be applied to materials production, silent blasting and other fields. More common concrete expansion agent, refractories expansion agent, mainly used in compensation contract, in the process of material hardening prevent cracking. In recent years, according to the material properties, but also developed a static blasting agent, mainly through the volume expansion of material damage to structures. Fuzhou expansive agent application characteristics: 1, often need to strengthen the maintenance, expansion agent in the field of material is usually created by reaction with water volume increase cell ( Ettringite, for instance) , which in turn caused inflation, so in the process of using it is necessary to give enough maintenance; 2, expansion agent is not gelling materials: strength type composite materials are usually divided into coarse aggregate ( Coarse aggregate) , fine aggregate ( Fine aggregate) , cementing materials ( Adhesive) And functional admixture ( Such as water reducing agent, coagulant retarder, etc. ) 。 Expansive agent usually appear solid powder, its purpose is not glue, can not replace the role of the gelled material. 3, about the mixing method: usually share outside mixing, mixing the two. In mixed with the description of dosage calculation, is a kind of material in mixing is 'when calculating the ratio of the expansion agent as a gelled material', the additive is quantitative add outside than the original ones, so a small amount of increase the dosage of water reducing agent is usually required. 4, the status quo at home and abroad, the current application of the technique is the most mature countries of Germany and Japan. Domestic research on technology of expansive agent widely institutions mainly China building materials science research institute, Shanghai silicate research institute of Chinese Academy of Sciences ( 'Silicon on the') Materials department, tsinghua university, Beijing university of science and technology, wuhan university of science and technology college of material and metallurgy etc. Main application fields: 5, fuzhou expansion agent in non-metallic, without sintering composite materials production industry, such as concrete and monolithic refractories.