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Nano seed crystal early strength agent and preparation method thereof

A technology of nano-crystal seed and early strength agent, which is applied in the preparation of nano-crystal seed early-strength agent, nano-crystal seed early-strength agent, and early-strength agent. It can solve the problems of not giving guidance and shortening the demoulding time of concrete. , to achieve the effect of shortening demoulding time, improving mechanical properties and good stability

Active Publication Date: 2018-11-06
SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Above these technologies have obvious early-strength effect to concrete for the present invention, can effectively shorten the demoulding time of concrete, do not provide specific guiding scheme

Method used

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  • Nano seed crystal early strength agent and preparation method thereof
  • Nano seed crystal early strength agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the nano-crystal seed early-strength agent of the present invention is to prepare the high molecular polymer dispersion liquid first, and then prepare the nano-crystal seed early-strength agent, specifically:

[0020] The high-molecular polymer dispersion is made of the following components and raw materials in parts by mass: 100 parts of polyether macromonomer with a weight-average molecular weight of 2400, namely isopentenol polyethylene glycol monomethyl ether, Silane coupling agent is 4.4 parts of vinyltriethoxysilane, unsaturated carboxylic acid is 12 parts of acrylic acid, chain transfer agent is 0.55 part of mercaptopropionic acid, initiator is 0.6 part, deionized water, initiator is 0.1 part of ascorbic acid and A combination of 0.5 parts hydrogen peroxide. The preparation method of the high molecular polymer dispersion comprises the following process steps: adding prenyl alcohol polyethylene glycol monomethyl ether, vinyl triethoxysilane and 67 pa...

Embodiment 2

[0022] Embodiment 2: the nano-crystal seed early-strength agent of the present invention is to prepare the polymer dispersion liquid first, and then prepare the nano-crystal seed early-strength agent, specifically:

[0023] The components, parts by mass and preparation method of the polymer dispersion are the same as in Example 1.

[0024] The preparation method of described nano-crystal seed early-strength agent comprises the following process steps: 1. get 10 parts of above-mentioned macromolecular polymer dispersion liquid, 150 parts of deionized waters and join in the reactor (500ml there-necked flask), start temperature controller and Stirrer, adjust the rotating speed of the stirrer to 400rpm, and dropwise add NaOH solution with a mass percentage concentration of 30% to adjust the pH to 7.0; Ionized water is made into C feed solution; 12 parts of inorganic calcium raw materials, namely calcium nitrate tetrahydrate, are weighed, and the calcium-silicon ratio (molar ratio)...

Embodiment 3

[0025] Embodiment 3: the nano-crystal seed early-strength agent of the present invention is to prepare the polymer dispersion liquid first, and then prepare the nano-crystal seed early-strength agent, specifically:

[0026] The components, parts by mass and preparation method of the polymer dispersion are the same as in Example 1.

[0027] The preparation method of described nano-crystal seed early-strength agent comprises the following process steps: 1. get 10 parts of above-mentioned macromolecular polymer dispersion liquid, 150 parts of deionized waters and join in the reactor (500ml there-necked flask), start temperature controller and Stirrer, adjust the rotating speed of the stirrer to 400rpm, and dropwise add NaOH solution with a mass percentage concentration of 30% to adjust the pH to 7.0; Ionized water is made into C feed solution; 18 parts of inorganic calcium raw materials, namely calcium nitrate tetrahydrate, are weighed, and the calcium-silicon ratio (molar ratio)...

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Abstract

Provided is a nano seed crystal early strength agent and a preparation method thereof. The method comprises the steps of first preparation of high molecular polymer dispersion liquid, and then the preparation of the nano seed crystal early strength agent; the high molecular polymer dispersion liquid is prepared from, by weight, 100 parts of polyether macromonomer, 2.5-4.5 parts of silane couplingagent, 7.5-12 parts of unsaturated carboxylic acid, 0.4-0.6 part of chain transfer agent, 0.6-1.2 parts of evocating agent and deionized water; the polyether macromonomer is one of prenol polyethyleneglycol monomethyl ether and methyl allyl alcohol polyethylene glycol monomethyl ether; the silane coupling agent is vinyl triethoxysilane, the unsaturated carboxylic acid is one of acrylic acid, methacrylic acid and fumaric acid, the chain transfer agent is mercaptopropionic acid, and the evocating agent is at least one of ascorbic acid and hydrogen peroxide. The invention also provides a preparation method. The agent has obvious early strength effect on concrete, effectively shortens the demoulding time of the concrete, and improves the mold turnover rate and the production efficiency.

Description

technical field [0001] The invention relates to an early-strength agent, in particular to a nano-crystal seed early-strength agent, which belongs to the technical field of building material chemical additives. The present invention also relates to a preparation method of the accelerator, in particular to a preparation method of the nano seed accelerator. Background technique [0002] With the rapid development of my country's modernization drive, the field of building materials has ushered in new opportunities and challenges. At present, my country is vigorously developing prefabricated buildings, subways and intercity rails, urban underground comprehensive pipe corridors, etc. The application of prefabricated components has become more and more extensive, and the demand is increasing day by day. Compared with ready-mixed concrete, prefabricated components can greatly improve production efficiency, save manpower, improve project quality, and reduce environmental pollution. ...

Claims

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Application Information

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IPC IPC(8): C04B24/42
CPCC04B40/0046C04B24/42C04B22/08
Inventor 赵明敏汪咏梅刘昭洋王龙飞王玉乾刘旭飞刘翠芬康静
Owner SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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