Preparation process of cement-based grouting material using kaolin

A preparation process and kaolin technology, applied in the field of preparation technology of cement-based grouting materials, can solve the problems of high cost, closely related metakaolin, complicated selection process of high-quality kaolin resources, etc., and achieve the effect of low cost and mining application value.

Inactive Publication Date: 2020-04-28
湖北合力久盛混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are the following defects in the above-mentioned patent: the high-strength non-shrinkage grouting material in this patent uses metakaolin, vermiculite powder, and chopped carbon fiber to form an expansion and anti-cracking component, so that the grouting material has micro-expansion properties, and the activity of metakaolin and its application in concrete or the effect in the grout is closely related
Metakaolin is calcined from kaolin at a certain temperature so that it has pozzolanic activity. In the prior art, high-performance concrete or grouting materials usually have extremely high requirements on the activity of metakaolin, but the selection of high-quality kaolin resources for the preparation of high-activity metakaolin The process is complex and costly, which greatly limits the wide application of kaolin in grouting materials

Method used

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  • Preparation process of cement-based grouting material using kaolin
  • Preparation process of cement-based grouting material using kaolin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A preparation process for cement-based grouting material using kaolin, comprising the following steps:

[0044] S1. Screening kaolin: screen the slurry part of kaolin ore to obtain powder, after drying, break up through a powder modifier and pass through a 325 mesh sieve to obtain kaolin with a powder content of 50% below 2 μm;

[0045] S2. Kaolin activation treatment:

[0046] (1) Calcination in the first stage: the kaolin in step S1 is calcined in the first stage, the calcination temperature T1 is 690°C, and the calcination time t1 is 80min;

[0047] (2) Calcination in the second stage: The kaolin obtained in the stage (1) is calcined in the second stage. The calcination in the second stage is divided into the first half and the second half. The calcination temperature T2 of the first half is 740 ° C and the calcination time is t2 100min, the calcination temperature of the second half is 740°C, the calcination time is 100min, the interval between the first half and the...

Embodiment 2

[0054] A preparation process for cement-based grouting material using kaolin, comprising the following steps:

[0055] S1. Screening kaolin: screen the slurry part of kaolin ore to obtain powder, after drying, break up through a powder modifier and pass through a 325 mesh sieve to obtain kaolin with a powder content of 54% below 2 μm;

[0056] S2. Kaolin activation treatment:

[0057] (1) Calcination in the first stage: the kaolin in the step S1 is calcined in the first stage, the calcination temperature T1 is 695°C, and the calcination time t1 is 85min;

[0058] (2) Calcination in the second stage: The kaolin obtained in the stage (1) is calcined in the second stage. The calcination in the second stage is divided into the first half and the second half. The calcination temperature T2 of the first half is 745 ° C and the calcination time is t2 100min, the calcination temperature of the second half is 745°C, the calcination time is 105min, the interval between the first half a...

Embodiment 3

[0065] A preparation process for cement-based grouting material using kaolin, comprising the following steps:

[0066] S1. Screening kaolin: screen the slurry part of kaolin ore to obtain powder, after drying, break up through a powder modifier and pass through a 325 mesh sieve to obtain kaolin with a powder content of 54% below 2 μm;

[0067] S2. Kaolin activation treatment:

[0068] (1) Calcination in the first stage: the kaolin in step S1 is calcined in the first stage, the calcination temperature T1 is 700°C, and the calcination time t1 is 90min;

[0069] (2) Calcination in the second stage: The kaolin obtained in the stage (1) is calcined in the second stage. The calcination in the second stage is divided into the first half and the second half. The calcination temperature T2 of the first half is 750 ° C and the calcination time is t2 105min, the calcination temperature of the second half is 750°C, the calcination time is 105min, the interval between the first half and t...

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Abstract

The invention discloses a preparation process of a cement-based grouting material using kaolin. The invention relates to the technical field of concrete production and preparation. The method comprises the following steps: S1, screening the kaolin; S2, activating the kaolin, to be more specific, the kaolin in the step S1 is calcined in three stages in sequence, in the first stage, the calcining temperature T1 is 690-710 DEG C, and the calcining time t1 is 80-100 minutes, the calcination temperature T2 of the second stage is 740-760 DEG C, the calcination time t2 is 200-220 min, the calcinationtemperature T3 of the third stage is 790-810 DEG C, and the calcination time t3 is 80-100 min; S3, performing heat preservation treatment; S4, performing cooling treatment; S5, performing ultrafine crushing, and S6, mixing. The method has the technical effects of excellent kaolin activation performance, simple activation mode and low cost.

Description

technical field [0001] The invention relates to the technical field of concrete production and preparation, in particular to a preparation process of cement-based grouting material using kaolin. Background technique [0002] Grouting is to pour appropriate condensable grout into loose strata, rocks, cracks or gaps in buildings. The grout penetrates into the stuff to be filled and spreads to gel or solidify, thereby improving the impermeability and performance of the stuffed objects. Strength, reinforcing the carrier increases its load-bearing capacity. According to the composition classification, the existing grouting materials can be mainly divided into organic grouting materials and inorganic grouting materials. [0003] Organic grouting materials are mainly chemical grouting materials. Organic grouting materials are toxic, expensive, and harmful to the environment. Inorganic grouting materials include clay grouting materials and cement grouting materials. Their applicati...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B20/04C04B14/10C04B111/70
CPCC04B20/04C04B28/00C04B2111/70C04B14/106C04B14/06C04B2103/302C04B2103/22C04B2103/50C04B22/143
Inventor 彭辉辉鲍洁黄海瑞童贻伟
Owner 湖北合力久盛混凝土有限公司
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