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The characteristics of water glass concrete acid: water glass acid resistant concrete with water glass as binder, sodium fluorosilicate as hardening agent, adding acid powder and acid aggregate or other additives according to a certain proportion. Features: the acid and good heat resistance, it can resist all kinds of strong oxidizing acid (such as sulfuric acid, hydrochloric acid, nitric acid) and most corrosive gases (oxygen, sulfur dioxide) erosion at high temperature (1000 DEG C) still has good acid resistance, mechanical strength and high. But this material is not resistant to hydrofluoric acid, more than 300 degrees of hot phosphoric acid and higher fatty acids or oleic acid erosion. Is a commonly used anti-corrosion material, it has a wide range of materials, acid resistance good, low cost advantages. Its disadvantages are no alkali resistance, poor impermeability and water resistance, complex construction, long maintenance period.
Acid resistant coarse aggregate: commonly used coarse aggregate are quartzite, Xuan Wuyan, granite, andesite and other made of crushed stones and acid bricks. Quality requirements: acid resistance is not less than 95%; water content is not greater than 0.5%; water absorption rate is not more than 1.5%; 3, not allowed to contain soil. The maximum particle size shall not exceed 1 / 4 of the minimum size of the structure and the net distance between the steel bars 3 / 4, and shall not exceed 25mm for the floor (platform surface) of the building, and less than 213 of the surface thickness.
Water glass acid resistant concrete raw material: water glass, acid resistant concrete raw materials, including cementation material, curing agent, acid resistant aggregate and admixture. The composition of water glass and acid resistant soil is different, and the prepared concrete will have different properties and range of application. 1) cement material - water glass: building engineering usually use sodium silicate glass (including Na20). Divided into powder water glass and liquid water glass according to their different states. Liquid water glass is a fine quartz sand, S102 (or quartzite) mixed with sodium carbonate in a certain proportion, placed in a furnace of 1350 - 1400 DEG C, and cooled by melting reaction to be a semi-finished product of solid water glass. The solid water glass is put into the autoclave, and the water vapor is dissolved into water so that a practical liquid water glass can be obtained. The liquid water glass can be obtained by two times of spray drying, which is usually called sodium silicate powder. The modulus and specific density of water glass have great influence on the properties of concrete. In order to guarantee the technical performance of acid proof concrete, the water glass of suitable modulus and specific density must be chosen. According to the experience of acid proof construction, water glass modulus 2 is recommended. From 6 to 3.O, the corresponding specific density is from 1.38 to 1.40. Water glass appearance is colorless, slightly blue transparent or translucent viscous liquid.
