Preparation method for durable cement anti-permeability powder and production system for durable cement anti-permeability powder
A production system, cement technology, applied in cement mixing equipment, clay preparation equipment, chemical instruments and methods, etc.
Inactive Publication Date: 2016-04-20
邢东海 +1
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Problems solved by technology
Although the structural design, construction management and waterproof measures can improve its durability to a certain extent, it cannot completely solve the problem of defects.
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[0018] The invention provides a preparation method of durable cement anti-seepage powder. Based on the traditional cement preparation operation, 2% to 5% of the total mass of cement is added to the hydrophobic nano-silica in the cement hydration process. Nano silica, so that it can interact with hydrated Ca(OH) during the hydration process with Portland cement 2 The formation of silicate gel microcrystals is used to fill the voids in cement products.
[0019] Specifically, the hydrophobic nano-silica is nano-scale silica containing crystal water, wherein the particles smaller than 100nm are more than 50% in this example.
[0020] Specifically, the hydrophobic nano-silicon dioxide is nano-silicon dioxide coated by hydrophobic organosilicon pressure spraying, and its dosage accounts for 3% to 5% of the nano-silicon powder, and the coating rate is greater than 60%.
[0021] Herein, the hydrophobic nano-silica is silicon dioxide containing crystal water produced by a precipitatio...
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The invention provides a preparation method for durable cement anti-permeability powder and a production system for the durable cement anti-permeability powder. Hydrophobic nanosilicon dioxide accounting for 2% to 5% of the total mass of Portland cement is added in the cement hydration process, and silicate gel micro-crystals are generated through hydrophobic nanosilicon dioxide and used for filling of finished cement gaps. The production system for the durable cement anti-permeability powder comprises a stirring assembly and an adding assembly. The adding assembly comprises an additive containing box and a conveying pipe. An electronic valve is arranged on the conveying pipe, and the additive containing box is communicated with the connecting pipe through a conveying pipe. By means of the scheme, before cement is used or during construction, hydrophobic nanosilicon dioxide accounting for 2% to 5% of the total mass of the cement is added, during the hydration process of the Portland cement, hydrophobic nanosilicon dioxide and hydrated Ca(OH)2 can rapidly generate the silicate gel micro-crystals, micro-holes and water film interfaces are filled, concrete and other products are compact in structure, anti-permeability performance is greatly improved, and the long-life purposes of enhancement, permeability resistance, freezing resistance, durability and the like are achieved.
Description
technical field [0001] The invention relates to the technical field of cement preparation, and more specifically relates to a preparation method of durable cement anti-seepage powder and a production system of durable cement anti-seepage powder. Background technique [0002] The inherent defect of cement after hydration is that the structure is loose, porous and mostly connected holes, which affect the overall strength. Due to the large pore size in cement, ambient water and air can easily penetrate into the structure to continue hydration and corrosion, resulting in cracking or pulverization of cement. If there are steel and iron parts inside the cement, an "alkali-aggregate reaction" will also be formed, which is the internal root cause of the short service life of cement concrete. Although structural design, construction management and waterproof measures can improve its durability to a certain extent, it cannot completely solve the problem of existing defects. Content...
Claims
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IPC IPC(8): C04B28/04C04B14/06B28C5/16B28C7/12B28C7/02B28C7/14C04B111/27
CPCC04B28/04B28C5/16B28C7/02B28C7/12B28C7/14C04B14/062C04B2111/27
Inventor 邢东海黄清林
Owner 邢东海