A kind of cement slurry with controllable rheology and its preparation method

A technology of rheology and cement, applied in the field of cement, can solve problems such as difficult to obtain raw materials and methods, too long initial setting time, and uncontrollable rheological properties of cement slurry, so as to achieve short initial setting-final setting time interval and promote cement Controllable effect of hydration process and flow denaturation

Active Publication Date: 2019-01-04
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the above-mentioned technologies have their advantages, they are difficult to obtain raw materials and methods in engineering, and there are disadvantages such as uncontrollable rheological properties of cement slurry and long initial setting time.

Method used

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  • A kind of cement slurry with controllable rheology and its preparation method
  • A kind of cement slurry with controllable rheology and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A cement slurry with controllable rheology and a preparation method thereof. The cement slurry with controllable rheology is made of 30-35wt% calcium aluminate cement and 65-70wt% α-alumina micropowder as raw materials, and mixed evenly; then adding 1-15wt% silicon The sol and 35-40wt% water were stirred for 3-8 minutes to obtain cement slurry with controllable rheology.

[0021] A cement slurry with controllable rheology prepared in this example is poured into the cylinder of the rheometer, and the rheological shear rate is: 0.1 100s 1 20s 10 100s 500 30s 500 120s 1s -1 ; The obtained shear rate-viscosity curve is as figure 1 Contain 1wt% silica sol curve to show in, shear rate-shear stress curve is as shown in figure 2 It is shown in the curve containing 1wt% silica sol.

[0022] The cement slurry with controllable rheology prepared in this example is tested: the initial setting time is 140-155 minutes; the final setting time is 185-195 minutes.

Embodiment 2

[0024] A cement slurry with controllable rheology and a preparation method thereof. The cement slurry with controllable rheology is made of 34-40wt% calcium aluminate cement and 60-66wt% α-alumina micropowder as raw materials, and mixed evenly; then adding 14-25wt% silicon The sol and 35-40wt% water were stirred for 3-8 minutes to obtain cement slurry with controllable rheology.

[0025] A cement slurry with controllable rheology prepared in this example is poured into the cylinder of the rheometer, and the rheological shear rate is: 0.1 100s 1 20s 10 100s 500 30s 500 120s 1s -1 ; The obtained shear rate-viscosity curve is as figure 1 Contain 16wt% silica sol curve to show in, shear rate-shear stress curve is as shown in figure 2 shown.

[0026] The cement slurry with controllable rheology prepared in this example is tested: the initial setting time is 130-145 minutes, and the final setting time is 168-190 minutes.

Embodiment 3

[0028] A cement slurry with controllable rheology and a preparation method thereof. The cement slurry with controllable rheology is made of 39-45wt% calcium aluminate cement and 55-61wt% α-alumina micropowder as raw materials, and mixed evenly; then adding 24-35wt% silicon The sol and 35-40wt% water were stirred for 3-8 minutes to obtain cement slurry with controllable rheology.

[0029] A cement slurry with controllable rheology prepared in this example is poured into the cylinder of the rheometer, and the rheological shear rate is: 0.1 100s 1 20s 10 100s 500 30s 500 120s 1s -1 ; The obtained shear rate-viscosity curve is as follows figure 1 Containing 26wt% silica sol curve in the middle, shear rate-shear stress curve is as shown in figure 2 shown.

[0030] The cement slurry with controllable rheology prepared in this example is tested: the initial setting time is 120-135 minutes, and the final setting time is 150-170 minutes.

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Abstract

The invention relates to cement slurry with a controllable rheological property and a preparation method thereof. The cement slurry has the technical scheme that the cement slurry with the controllable rheological property is prepared by the following steps: by using 30 to 50 weight percent of calcium aluminate cement and 50 to 70 weight percent of alpha-aluminum oxide micro powder as raw materials, uniformly mixing the raw materials; then, adding silica sol accounting for 1 to 50 weight percent of the raw materials and water accounting for 35 to 40 weight percent of the raw materials; performing stirring for 3 to 8 minutes to obtain the cement slurry with the controllable rheological property. The Al2O3 content of the aluminate cement is higher than 53 weight percent, and the CaO content of the aluminate cement is higher than 21 weight percent; the silica sol concentration is 1 to 50 weight percent, and the particle diameter is 5 to 100nm. By using raw materials and methods easily realized in the engineering, the characteristics that the process is simple and the engineering application applicability is realized are achieved. Compared with cement slurry prepared in the prior art, the prepared cement slurry with the controllable rheological property has the advantages that the rheological property is controllable; the initial setting-final setting time interval is short.

Description

technical field [0001] The invention belongs to the technical field of cement. Specifically relates to a cement slurry with controllable rheology and a preparation method thereof. Background technique [0002] Compared with shaped refractory materials, unshaped refractory materials have the advantages of less energy consumption, low equipment costs, small infrastructure investment and high construction efficiency, and their application in refractory materials is gradually expanding. Castable is one of the most commonly used and widely used unshaped refractory materials. Its biggest feature is its good fluidity, which is suitable for on-site construction by pouring method, and it can be hardened to generate strength without heat treatment. And castables are usually poured directly at the construction site, or made into prefabricated parts according to needs and put into use directly. With the rapid development and improvement of the metallurgical industry and high-temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/32C04B7/51
CPCC04B7/32C04B7/51
Inventor 陈平安李享成朱伯铨
Owner WUHAN UNIV OF SCI & TECH
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