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A kind of PCE composite seed type early strength agent and its preparation method and application

A technology of composite crystal and early strength agent, applied in the field of concrete admixtures, can solve the problems of high durability risk, poor early strength effect and high material cost of early strength agent, achieve simple and convenient equipment operation, reduce synthesis cost, grind Efficient effect

Active Publication Date: 2022-06-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007]Based on the above-mentioned technical background, aiming at the problems of existing early strength agents such as high durability risk, poor early strength effect, high material cost and limited sources, the present invention Provided is a PCE composite seed crystal type accelerator and a preparation method thereof

Method used

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  • A kind of PCE composite seed type early strength agent and its preparation method and application
  • A kind of PCE composite seed type early strength agent and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Get 16 parts by weight of PCE mother liquor, add 184 parts by weight of deionized water to obtain 200 parts by weight of PCE with a solid content of 4%, which is denoted as 4%-PCE;

[0041] (2) Get 24 parts by weight to analyze pure calcium oxide and silica fume powder. Silica fume is processed through drying in advance. (the ratio of calcium oxide and silica fume total mass and 4%-PCE total mass) is 12%;

[0042] (3) Pour the weighed calcium oxide and silica fume into the grinding cylinder of the sand mill, then add 4%-PCE and 700g of zirconia grinding media with a particle size of 0.2mm in sequence, and immediately put the grinding cylinder into the sand mill In the machine, wet ultra-fine grinding is started after the cooling circulating water is connected, the speed of the sand mill is set to 2000rpm, and the average particle size of the suspension is ground to less than 300nm, and the suspension is ultrasonicated for 30 minutes to obtain the PCE composite seed ...

Embodiment 2

[0047] (1) Get 24 parts by weight of PCE mother liquor, add 176 parts by weight of deionized water to obtain 200 parts by weight of PCE with a solid content of 6%, denoted as 6%-PCE;

[0048] (2) Get 24 parts by weight to analyze pure calcium oxide and silica fume powder. Silica fume is processed through drying in advance. 12%;

[0049] (3) Pour the weighed calcium oxide and silica fume into the grinding barrel of the sand mill, then add 6%-PCE and 700g of zirconia grinding media with a particle size of 0.2mm in sequence, and immediately put the grinding barrel into the sand mill In the machine, wet ultra-fine grinding is started after the cooling circulating water is connected, the speed of the sand mill is set to 2000rpm, and the average particle size of the suspension is ground to less than 300nm, and the suspension is ultrasonicated for 30 minutes to obtain the PCE composite seed crystal. Early strength agent, wherein the rated power of the ultrasonic equipment is 600 wat...

Embodiment 3

[0054] (1) Get 32 ​​parts by weight of the PCE mother liquor, add 168 parts by weight of deionized water to obtain 200 parts by weight of PCE with a solid content of 8%, which is denoted as 8%-PCE;

[0055] (2) Get 24 parts by weight to analyze pure calcium oxide and silica fume powder. Silica fume is processed through drying in advance. 12%;

[0056] (3) Pour the weighed calcium oxide and silica fume into the grinding barrel of the sand mill, then add 8%-PCE and 700g of zirconia grinding media with a particle size of 0.2mm in sequence, and immediately put the grinding barrel into the sand mill In the machine, wet ultra-fine grinding is started after the cooling circulating water is connected, the speed of the sand mill is set to 2000rpm, and the average particle size of the suspension is ground to less than 300nm, and the suspension is ultrasonicated for 30 minutes to obtain the PCE composite seed crystal. Early strength agent, wherein the rated power of the ultrasonic equip...

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Abstract

The invention discloses a PCE composite seed crystal type early strength agent as well as its preparation method and application. The preparation method comprises the following steps: grinding and reacting calcium raw material and silicon raw material, PCE dispersant and grinding medium in a sand mill; and ultrasonically treating the obtained suspension to prepare the PCE composite seed crystal type early strength agent. The invention mainly utilizes the principle of volcanic ash reaction and the principle of mechanochemical method, and the obtained PCE compound seed type early strength agent has small average particle size, good early strength effect, high stability, simple synthesis process and low cost, and is especially suitable for industrialization Large-scale production has good application prospects. The early-strength agent prepared by the invention does not contain components that may damage the later-stage strength of concrete, and has a remarkable effect on improving the early-stage strength of cement-based materials, especially the ultra-early-stage strength.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a PCE composite seed crystal type early strength agent and its preparation method and application. technical background [0002] With the continuous development of my country's construction industry, the demand for concrete prefabricated components is increasing. At present, most prefabricated component factories use steam curing to improve the early strength of components, so as to achieve rapid demoulding and increase mold turnover speed. Purpose. However, the steam curing process has high energy consumption and high pollution, which is not conducive to energy saving and emission reduction, and steam curing is easy to cause thermal damage to concrete, resulting in durability problems in the later stage of concrete. Traditional early strength agents such as chloride salts, sulfates, calcium formate, triethanolamine, etc., can significantly improve the early strength ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B103/10
CPCC04B40/0039C04B2103/10C04B24/32C04B22/064C04B18/146
Inventor 殷素红李普林东叶门康
Owner SOUTH CHINA UNIV OF TECH
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