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Nanometer composite type expansion anti-cracking waterproofing agent

A kind of anti-cracking waterproofing agent and composite technology, which is applied in the field of swelling anti-cracking waterproofing agent, can solve the problems of large slump loss, shortened setting time, and reduced bleeding rate, etc., to achieve fast hydration speed, improve mechanical properties, The effect of improving plasticity

Inactive Publication Date: 2013-06-19
QINGDAO BRANCH TIANJIN TAIKE BUILDING TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional expansion agent or waterproofing agent has relatively strict requirements in terms of dosage, limitation and curing conditions. Due to the adaptability of cement and concrete, it is easy to cause large slump loss, reduced bleeding rate, and shortened setting time. And other issues

Method used

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preparation example Construction

[0015] 1. Preparation of PSP silicone powder:

[0016] PSP silicone powder is a mixture of polysiloxane and aminopolyether silicone (the mass percentage of polysiloxane is 68.5%, and aminopolyether silicone is 31.5%). Among them, polysiloxane is composed of methyl chloride and SiO 2 The powder (according to mass ratio 3:1) is reacted at 230°C for 12 hours under the catalysis of copper sulfate. Add solvent xylene (solvent is methyl chloride and SiO2) in the kettle 2 15% of the mass of powder reaction raw materials), so that dimethyl dihydroxysilane is subjected to condensation polymerization reaction at 85°C to obtain cross-linked polymer polysiloxane;

[0017] Amino polyether silicone is obtained by addition reaction of hydrogen silicone oil with allyl polyether (volume ratio 1.3:1) under the catalysis of metal platinum at 105°C for 8 hours to obtain polyether modified silicone, and then polyether modified Amino polyether silicone was prepared by reacting silicone with diet...

Embodiment 1

[0024] A nanocomposite expansion anti-crack waterproofing agent of the present invention, its components and mass percent content are as follows: 24% calcium sulfoaluminate, 10% calcium aluminate, 15% calcium hydroxide, 5% PSP organic silicon powder, silicon 6% sodium phosphate, 2% sodium ethylenediamine phosphate, 1% iron powder, 2.5% borax, 0.4% manganese dioxide, 1.5% polypropylene fiber, 0.5% disodium edetate, 1.8% sodium tripolyphosphate , fly ash 15.2%, aminophenoxy naphthalene sulfonate 11.6%, FP nanopolymer 8.5%.

[0025] Its preparation method is as follows, after mixing calcium sulfoaluminate, calcium aluminate, fly ash, calcium hydroxide, iron powder, PSP organic silicon powder and aminophenoxynaphthalene sulfonate according to the above content, the method of ball milling Grind until the size is 3.5μm, then add sodium ethylenediamine phosphate, sodium tripolyphosphate, borax, sodium silicate, manganese dioxide, polypropylene fiber, disodium edetate, and FP nano Af...

Embodiment 2

[0027] Another nano-composite expansion anti-cracking waterproofing agent, its components and weight percentages are as follows: 10% calcium sulfoaluminate, 8% calcium aluminate, 15% calcium hydroxide, 11% PSP organic silicon powder, sodium silicate 7%, sodium ethylenediamine phosphate 2%, iron powder 2%, borax 2.5%, manganese dioxide 0.5%, polypropylene fiber 2.0%, disodium edetate 0.5%, sodium tripolyphosphate 3%, powder Coal Ash 22.5%, Aminophenoxynaphthalene Sulfonate 8%, FP Nanopolymer 6%.

[0028] The nanocomposite expansion anti-crack waterproofing agent of present embodiment 2, its specific technical index is as shown in table 1:

[0029] Table 1 Technical indicators of nanocomposite intumescent anti-crack waterproofing agent

[0030]

[0031]The cement adopts P·O 42.5R grade; the fine aggregate has an apparent density of 2.58g / cm 3 river sand (fineness modulus is 2.7); coarse aggregate has an apparent density of 2.65 g / cm 3 Granite; fly ash is Class II ash; wate...

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Abstract

The invention relates to a nanometer composite type expansion anti-cracking waterproofing agent. The nanometer composite type expansion anti-cracking waterproofing agent comprises the following components and contents: 9.2%-27.5% of calcium sulphoaluminate, 6.8%-11.2% of calcium aluminate, 7.1%-15.4% of calcium hydroxide, 4.8%-13.6% of PSP organic silicon powder, 3.6%-7.5% of sodium silicate, 0.1%-3.2% of ethanediamine sodium phosphate, 0.5%-2.5% of iron powder, 1.0-3.3% of borate, 0.1%-0.5% of manganese dioxide, 0.1%-2.4% of polypropylene fiber, 0.1%-0.8% of disodium ethylene diamine tetraacetate, 1.8%-4.3% of sodium tripolyphosphate, 15.2%-22.5% of pulverized fuel ash, 5.3%-11.6% of aminophenoxy naphthalene sulfonate and 5.1-8.5% of FP nanometer polymer. The expansion generated by the nanometer composite type expansion anti-cracking waterproofing agent and the contraction of concrete synchronously develop; and fillers generated by the nanometer composite type expansion anti-crackingwaterproofing agent can be used for effectively filling apertures of the concrete at different periods and different quantity values and under different action mechanisms of different crystal minerals. When the nanometer composite type expansion anti-cracking waterproofing agent is restrained by steel bars and adjacent positions, the 0.38MPa-0.8MPa prestressing stress can be generated; and different expansion mineral phases are generated at different ages of the concrete, thereby very effectively controlling the generation and development of non-structural cracks such as the early-stage plastic shrinkage and air shrinkage of the concrete and the cement plaster.

Description

technical field [0001] The invention belongs to the technical field of expansion and anti-cracking waterproofing agent, in particular to a nanocomposite expansion and anti-cracking and waterproofing agent. Background technique [0002] With the rapid development of the economy, my country's construction industry is also developing rapidly, and the use of concrete has also greatly increased. However, during the pouring and hardening process of concrete, volume shrinkage will occur due to reasons such as chemical shrinkage, cold shrinkage, and dry shrinkage. And the more cement and water used per unit, the larger the concrete volume, the faster the water evaporates, and the more obvious the shrinkage. Generally, every 1m 3 The shrinkage value of concrete is 0.04%-0.09%, which leads to adverse consequences such as cracking, leakage, corrosion of steel bars, and loss of prestress in concrete. [0003] In order to solve this problem, according to different concrete mix ratios,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/40C04B22/14C04B22/04C04B103/65
Inventor 皇甫新章于慧白静
Owner QINGDAO BRANCH TIANJIN TAIKE BUILDING TECHCO
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