Multifunctional expandable fiber anti-cracking waterproof agent and preparation method
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A technology of anti-cracking and waterproofing agent and swelling fiber, which is applied in the field of multi-functional expanding fiber anti-cracking and waterproofing agent and its preparation, can solve the problems of waterproofing, cracking resistance and unsatisfactory expansion performance, and achieve low cost, easy-to-obtain raw materials, and anti-cracking properties. strong cracking effect
Active Publication Date: 2018-11-27
TIANJIN JINSHENGYUAN SPECIAL BUILDING MATERIALS
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However, the waterproof, anti-crack and expansion properties of the concrete prepared by the technologies of these two patents are still unsatisfactory
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preparation example Construction
[0038] B2, preparation of oxidation catalyst: mix potassium dichromate and potassium manganate in a weight ratio of 2:1 to obtain a mixed oxidant; mix ammonium chloride and sodium chloride in a weight ratio of 2:3 to obtain a mixing accelerator agent;
[0039] B3. Take another sodium isobutylnaphthalene sulfonate, mix the mixed iron powder, mixed oxidant, mixing accelerator, and sodium isobutylnaphthalene sulfonate in a weight ratio of 10:1:1:0.1 to obtain an iron powder expander .
[0040] (3) Preparation of modified polypropylene fiber
[0041]C1. Take potassium dichromate, concentrated sulfuric acid, and deionized water to make a solution in a weight ratio of 10:75:15, add polypropylene fiber, and heat it in a water bath at a temperature of 60-80°C and a stirring speed of 200-500r / min for 2- 4h, the intermediate product of modified polypropylene fiber was obtained;
[0042] C2. The intermediate product of modified polypropylene fiber is washed with deionized water, filte...
Embodiment 1～5 and comparative example 1～2
[0045] Calcium sulfoaluminate, calcium oxide, magnesium oxide, fly ash, iron powder expansion agent, modified sepiolite wool, modified polypropylene fiber, sodium methyl silicate in Examples 1-5 and Comparative Examples 1-2 , sodium fluorosilicate, polycarboxylate high-efficiency water reducer in parts by weight as shown in Table 1 below.
[0046] The parts by weight of the raw material of table 1 embodiment 1~5 and comparative example 1~2, unit: part
[0047]
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Abstract
The invention discloses a multifunctional expandable fiber anti-cracking waterproof agent. The multifunctional expandable fiber anti-cracking waterproof agent comprises the following components in parts by weight: 8-27.3 parts of calcium sulphoaluminate, 4-9 parts of calcium oxide, 5-9 parts of magnesium oxide, 14.7-23.5 parts of fly ash, 4-9 parts of an iron powder expanding agent, 1.5-7.8 partsof a modified sepiolite fabric, 1-4.5 parts of modified polypropylene fibers, 1.5-4 parts of sodium methyl silicate, 0.5-1.5 parts of sodium fluosilicate and 1-4 parts of a polycarboxylic acid effective water reducing agent, wherein the modified sepiolite fabric is modified through diluted hydrochloric acid and a silane coupling agent, the modified polypropylene fibers are modified through potassium dichromate, concentrated sulfuric acid and a silane coupling agent, thus, mutually cross-linked net-shaped structures are formed in concrete, compared with an existing anti-cracking waterproof agent which takes common sepiolite, sepiolite fibers and polypropylene fibers as raw materials, the anti-cracking waterproof agent is better in anti-cracking property and expanding property, shorter in time of coagulation and higher in concrete performance. The invention further provides a preparation method of the anti-cracking waterproof agent, and the raw materials are blended by a two-step method.
Description
technical field [0001] The invention belongs to the technical field of concrete preparation, in particular to a multifunctional expansion fiber anti-crack waterproofing agent and a preparation method thereof. Background technique [0002] According to statistics, at present, more than 80% of the concrete has different degrees of cracking. Harmful substances and water migrate into the interior of the concrete through the cracks, causing damage to its structure, resulting in further expansion of the cracks, resulting in a rapid decline in the strength and durability of the building. , ultimately affecting the service life of the building. To solve the problem of cracks, it is necessary to add expansion agent or fiber in the preparation process of concrete. Among the expansion agents added, the compound of calcium sulfoaluminate-calcium oxide can compensate the early shrinkage of concrete, and use it to compensate for the late shrinkage of concrete; In addition, the adsorption...
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