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A high fluidity, silica mortar technology, applied in the application field of civil engineering materials, can solve the problems of inducing human diseases, carcinogenesis, and visibility reduction, etc., and achieve the effect of simple process and convenient processing
Inactive Publication Date: 2015-12-09
SOUTH CHINA UNIV OF TECH
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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 t
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Embodiment 1
[0016] A preparation method for high fluidity silica mortar, comprising steps:
[0017] 1) Ingredients, the raw materials include 40% silica fume and 59.976% water by mass percentage, and sodium hexametaphosphate is used in this embodiment. As a dispersant, its mass is 0.06% of the mass of silica fume, that is, 0.024% of the mass of silica mortar;
[0018] 2) Put the prepared silica fume and dispersant in the silica mortar mixer;
[0019] 3) Slowly stir for 4-6 minutes while adding water to the mixer to prepare a silica mortar with a solid content of 40%.
Embodiment 2
[0021] A preparation method for high fluidity silica mortar, comprising steps:
[0022] 1) Ingredients, raw materials include 50% silica fume and 49.60% water by mass percentage, sodium hexametaphosphate is used in this embodiment. As a dispersant, its mass is 0.8% of the mass of silica fume, that is, 0.4% of the mass of silica mortar;
[0023] 2) Put the prepared silica fume and dispersant in the silica mortar mixer;
[0024] 3) Slowly stir for 4-6 minutes while adding water to the mixer to prepare a silica mortar with a solid content of 50%.
Embodiment 3
[0026] A preparation method for high fluidity silica mortar, comprising steps:
[0027] 1) Ingredients, the raw materials include 60% silica fume and 39.50% water by mass percentage, and sodium hexametaphosphate is used in this embodiment. As a dispersant, its mass is 0.83% of the mass of silica fume, that is, 0.5% of the mass of silica mortar;
[0028] 2) Put the prepared silica fume and dispersant in the silica mortar mixer;
[0029] 3) Add water to the mixer and stir slowly for 4-6 minutes to prepare a silica mortar with a solid content of 60%.
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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...
Claims
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Application Information
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