Method for preparing high-fluidity silica mortar

Abstract

The invention discloses a method for preparing high-fluidity silica mortar. The method includes the steps that 1, material preparation is conducted, wherein the raw material is prepared from 40%-60% of silica fume, 40%-60% of water and dispersing agents which accounts for 0.06%-1.00% the mass of the silica fume; 2, the silica fume and dispersing agents which are prepared ready are placed in a silica mortar stirrer; 3, water is added into the stirrer while stirring is conducted slowly for 4-6 minutes, and then the silica mortar is obtained. The method is simple in process, the high-fluidity silica mortar can be prepared only through the dispersing agents, and the prepared silica mortar can be stored for half a year at the temperature of lower than 80 DEG C without going bad. The harm to human bodies and the pollution to the environment are lowered and even eliminated in the use process of the high-fluidity silica mortar, the function of the silica mortar is fully played, and the mechanical property and the endurance quality of concrete are improved. The obtained silica mortar can be widely applied to important engineering of high requirements for the concrete, such as, high-strength concrete, marine concrete and hydraulic concrete.

Description

technical field [0001] The invention relates to the technical field of application of civil engineering materials, in particular to a preparation method of high fluidity silica mortar. technical background [0002] In the field of civil engineering and construction, existing studies have shown that silica fume has fine particle size, large specific surface area, and high pozzolanic activity, which can significantly improve the cohesion and water retention of concrete, and improve the mechanical properties of concrete and chloride ion resistance. It is one of the effective measures to improve the durability of concrete, such as penetration and resistance to sulfate attack. Therefore, silica fume is widely used in important buildings. [0003] Silica fume is a by-product of the production of ferrosilicon alloys, and its average particle size is only 0.1-0.2 μm, which belongs to particulate matter (PM2.5) with a particle size of less than 2.5 μm. At present, powdered silica f...

AI Technical Summary

Problems solved by technology

At present, powdered silica fume is directly packed in bags for transportation and used in a mixer. During transportation and use, fine silica fume is easily dispersed into the air, producing a large amount of PM2.5, which can induce human diseases and even cause cancer. It is the cause of smog weather, factors that reduce visibility

At the same time, most ferrosilicon production enterprises are concentrated in provinces with relatively backward economy. Due to the low packing density of silica fume, it brings great inconvenience to transportation and storage, and greatly increases the cost of packaging and transportation.

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