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A kind of nano crystal nucleus early strengthening agent and preparation method thereof

A technology of early strength agent and nano crystal, which is applied in the field of nano crystal nucleus early strength agent and its preparation, can solve the problems of limited particle size control effect, large structural molecular weight, and inability to arrange dispersants tightly, so as to facilitate uniform nucleation , High activity, low foaming ability

Active Publication Date: 2022-06-07
CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] And because the dispersant used in the current technology is an anionic polymer, its structural molecular weight is large, it has better steric hindrance and certain dispersion, but the dispersant cannot be tightly arranged on the surface of the nanocrystalline core particles. Resulting in limited effect on particle size control

Method used

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  • A kind of nano crystal nucleus early strengthening agent and preparation method thereof
  • A kind of nano crystal nucleus early strengthening agent and preparation method thereof
  • A kind of nano crystal nucleus early strengthening agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A nanocrystalline nucleus early strength agent, comprising the following components by weight:

[0043] 0.4% of dispersant, 5% of calcium salt, 5% of composite silicon salt, and the balance is water; wherein, the dispersant includes a 2:1 mass ratio of phosphoric acid-terminated hydroxyl group-modified EO / PO block polycondensate and acrylic acid-polyoxygen vinyl ether copolymer;

[0044] Wherein, the preparation method of phosphoric acid terminal hydroxyl modified EO / PO block polycondensate is as described above, and its chemical structural formula is:

[0045] [CH 3 CH 2 (CH 2 CH 2 O) 8 (CHCH 3 CH 2 O) 5 ]2-OP(OH);

[0046] The calcium salt includes calcium nitrate and calcium acetate in a weight ratio of 1:1;

[0047] The composite silicon salt includes sodium silicate and lithium silicate in a mass ratio of 10:1, and the doping amount of polyethylene glycol in the composite silicon salt is 0.3% of the total mass of sodium silicate and lithium silicate.

[...

Embodiment 2

[0053] A nanocrystalline nucleus early strength agent, comprising the following components by weight:

[0054] 1.2% of dispersant, 10% of composite calcium salt, 10% of composite silicon salt, and the balance is water; wherein, the dispersant includes phosphate-terminated hydroxyl group modified EO / PO block polycondensate and acrylic acid-polyester with a mass ratio of 8:1 Oxyethylene ether copolymer;

[0055] Wherein, the preparation method of phosphoric acid terminal hydroxyl modified EO / PO block polycondensate is as described above, and its chemical structural formula is:

[0056] [CH 3 CH 2 (CH 2 CH 2 O) 8 (CHCH 3 CH 2 O) 5 ]2-OP(OH);

[0057] The calcium salt includes calcium nitrate and calcium chloride in a weight ratio of 2:3;

[0058] The composite silicon salt includes sodium silicate and lithium silicate in a mass ratio of 5:5, and the doping amount of polyethylene glycol in the composite silicon salt is 0.2% of the total mass of the sodium silicate and li...

Embodiment 3

[0064] A nanocrystalline nucleus early strength agent, comprising the following components by weight:

[0065] 3% of dispersant, 15% of calcium salt, 15% of composite silicon salt, and the balance of water; wherein, the dispersant includes a 10:1 mass ratio of phosphoric acid-terminated hydroxyl group-modified EO / PO block polycondensate and acrylic acid-polyoxygen vinyl ether copolymer;

[0066] Wherein, the preparation method of phosphoric acid terminal hydroxyl modified EO / PO block polycondensate is as described above, and its chemical structural formula is:

[0067] [CH 3 CH 2 (CH 2 CH 2 O) 8 (CHCH 3 CH 2 O) 5 ]2-OP(OH);

[0068] Calcium salts include calcium nitrate, calcium chloride and calcium acetate in a mass ratio of 8:1:1;

[0069] The composite silicon salt includes sodium silicate and lithium silicate in a mass ratio of 8:1, and the doping amount of polyethylene glycol in the composite silicon salt is 0.1% of the total mass of the sodium silicate and lith...

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Abstract

The invention discloses a nano crystal nucleus early strength agent as well as its preparation method and application. The early strength agent includes the following components in weight percentage: 0.4-4% of dispersant, 5-15% of calcium salt, 5-15% of composite silicon salt, and the balance is water; wherein, the dispersant includes phosphoric acid-terminated hydroxyl-modified EO / PO block condensation polymer and anionic high polymer. The early-strength agent prepared by the invention has small particle size, uniform distribution and high stability, and has better early-strength performance when used in Portland cement systems.

Description

technical field [0001] The invention belongs to the technical field of coagulation admixtures, in particular to a nanocrystalline nucleus early strength agent and a preparation method and application thereof. Background technique [0002] Prefabricated components and prefabricated buildings are an important part of building industrialization. In order to shorten the demolding cycle of prefabricated components and improve the turnover rate of formwork, it is necessary to improve the early strength of prefabricated components. The traditional early-strength type admixtures are mainly inorganic salts and organic alcohol amines, but inorganic salts are not only high in dosage, but also easy to cause corrosion of steel bars; organic alcohol amines have problems such as high price and sensitive dosage. [0003] The use of nanocrystalline core early strength technology to improve the early strength of concrete has been reported. Nano-calcium silicate is an important early-strengt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B103/12C04B103/40
CPCC04B40/0046C04B24/243C04B2103/12C04B2103/408C04B24/32C04B22/085C04B24/04C04B12/04C04B24/122C04B22/124Y02W30/91
Inventor 高育欣闫松龄刘明杨文曾超叶子张磊王福涛
Owner CHINA WEST CONSTR ACAD OF BUILDING MATERIALS CO LTD
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