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Cement-based cementitious material early-strength type composition dispersant

A technology of cementitious materials and compositions, which is applied in the field of early-strength composition dispersants for cement-based cementitious materials, and can solve the problems of early-strength agents such as cost performance and single function

Active Publication Date: 2020-05-26
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned prior art is mostly the preparation method of cementitious materials, and the cost performance and singleness of action of the early strength agent are one of the difficulties that the above-mentioned prior art tries to solve

Method used

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  • Cement-based cementitious material early-strength type composition dispersant

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Experimental program
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Embodiment 2

[0056] A preparation method of a cement-based cementitious material early-strength type composition dispersant, the dispersant is formed by mixing and stirring the following semi-finished products in terms of weight percentage:

[0057] Alkanolamine iron aluminum complex: 12%;

[0058] Cationic polymer: 5%;

[0059] Metal ion chelating agent: 1.0%;

[0060] Metal sulfate: 20%;

[0061] The balance is water.

[0062] The metal ion chelating agent: 2-phosphonic acid butane-1,2,4-tricarboxylic acid.

[0063] Described metal sulfate: ferrous sulfate.

[0064] The alkanolamine iron-aluminum complex is formed by polymerizing the following components according to the total mass fraction of 100 parts, and the preparation method is as follows:

[0065] 1) Add 1 part of the composition of sulfuric acid and phosphoric acid with a mass ratio of 1:2, 0.2 parts of diethylene triamine pentacarboxylate, 10.6 parts of ferrous sulfate, 16 parts of aluminum sulfate and 45 parts of water int...

Embodiment 3

[0074] A preparation method of a cement-based cementitious material early-strength type composition dispersant, the dispersant is formed by mixing and stirring the following semi-finished products in terms of weight percentage:

[0075] Alkanolamine iron aluminum complex: 15%;

[0076] Cationic polymer: 2%;

[0077] Metal ion chelating agent: 1.5%;

[0078] Metal Sulfates: 17%.

[0079] The balance is water.

[0080] The metal ion chelating agent: bis-1,6-hexamethylenetriaminepentamethylenephosphonic acid.

[0081] Described metal sulfate: magnesium sulfate.

[0082] The alkanolamine iron-aluminum complex is formed by polymerizing the following components according to the total mass fraction of 100 parts, and the preparation method is as follows:

[0083] The preparation of the alkanolamine iron-aluminum complex is characterized in that: the alkanolamine iron-aluminum complex is polymerized from the following components by mass percentage, the total mass is 100, and the p...

Embodiment 4

[0094]A preparation method of a cement-based cementitious material early-strength type composition dispersant, the dispersant is formed by mixing and stirring the following semi-finished products in terms of weight percentage:

[0095] Alkanolamine iron aluminum complex: 13.5%;

[0096] Cationic polymer: 4%;

[0097] Metal ion chelating agent: 2.0%;

[0098] Metal sulfate: 15%;

[0099] The balance is water.

[0100] Described metal ion chelating agent: hydroxyethylidene diphosphonic acid;

[0101] The metal sulfate: in zinc sulfate.

[0102] The alkanolamine iron-aluminum complex is formed by polymerizing the following components according to the total mass fraction of 100 parts, and the preparation method is as follows:

[0103] 1) Add 1 part of a composition of sulfuric acid and phosphoric acid with a mass ratio of 1:2, 0.2 parts of diethylene triamine pentacarboxylate, 6.7 parts of ferrous sulfate, 19 parts of aluminum sulfate and 55 parts of water into the reactor, a...

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Abstract

The invention discloses an early-strengthening type composition dispersing agent of a cement-based cementitious material. The dispersing agent is prepared by mixing the following components in percentage by weight: 10-15% of alkylolamide ferroaluminum complex, 2-7% of cationic polymer, 0.5-2.0% of a metal ion chelating agent, 15-25% of metal sulfate, and the balance of water, wherein the alkylolamide ferroaluminum complex in the composition is prepared by synthesizing inorganic acid, a chelating agent, ferrous sulfate, aluminum sulfate and alkylolamide; the cationic polymer is prepared by synthesizing polyether macromonomer, cationic micromonomer, acrylamide, a double-bond-containing silane coupling agent, mercaptoethanol, hydrogen peroxide, ammonium persulfate, sodium formaldehyde sulfoxylate, sodium hypophosphite hydrate and caustic soda liquid. With the adoption of the early-strengthening type composition dispersing agent, the early strength of the cement-based cementitious materialcan be obviously improved under low doping quantity and on the premise that the working mobility of the cement-based cementitious material is basically not influenced.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, relates to the technical field of cement-based cementitious materials chemical industry, and specifically relates to a cement-based cementitious material early-strength type composition dispersant, which is used for projects requiring high early strength or winter construction . Background technique [0002] At present, in major projects, such as high-speed rail, subway, marine engineering, bridge, water conservancy, hydraulic engineering and other projects, it is necessary to increase the early strength of concrete to speed up the progress of the project or meet the needs of the project. Usually, it is necessary to reduce the water-binder ratio, increase the amount of cement and Adding composite early-strength superplasticizer and other methods, the above method will greatly increase the risk of concrete volume instability and cracking. Most of the traditional early strength compone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C08F283/06C08F220/34C08F220/56C04B103/40
CPCC04B40/0039C04B2103/408C08F283/065C08F220/34C08F220/56C04B24/122C04B24/32C04B24/121C04B22/148C04B24/04C04B22/142
Inventor 柯凯文帅涛王迎斌谌援
Owner HUBEI UNIV OF TECH
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