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A preparation method and pumping process of high-strength lightweight aggregate concrete

A lightweight aggregate concrete, high-strength technology, applied in the field of lightweight aggregate concrete, can solve the problems of low activity, affect the construction of lightweight aggregate concrete, strength limitation, etc., and achieve the effects of improving pore structure, shortening construction time, and increasing early strength.

Active Publication Date: 2021-11-19
泸州临港思源混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This lightweight aggregate concrete is suitable for super high-rise pumping construction. However, since fly ash is easy to absorb moisture in the air at room temperature and has low activity, if it is directly added to lightweight aggregate concrete, the early strength of concrete will be affected. Restrict and affect the construction of light aggregate concrete

Method used

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  • A preparation method and pumping process of high-strength lightweight aggregate concrete

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for preparing high-strength lightweight aggregate concrete, the ratio of raw materials is shown in Table 1.

[0044] S1. Pretreatment of fly ash

[0045] A. In the case of constant stirring, spray water into the fly ash, the water is completely absorbed by the fly ash, the amount of water added is 30% of the total weight of the fly ash, and the average particle size of the fly ash 20μm, the fly ash is Class I fly ash, and the fly ash is selected from Chengdu Junrui Building Materials Co., Ltd.;

[0046] B. Under the conditions of constant stirring and a temperature of 115°C, carry out constant temperature treatment on the fly ash in step A, most of the water in the fly ash will volatilize, and a small amount of water will remain in the fly ash, and the fly ash The water content reaches 4wt%;

[0047] C. Under nitrogen protection and a temperature of 530°C, roast the fly ash in step B. The residual water in the fly ash increases the hydroxyl content on the sur...

Embodiment 2

[0053] A method for preparing high-strength lightweight aggregate concrete, the ratio of raw materials is shown in Table 1.

[0054] S1. Pretreatment of fly ash

[0055] A. In the case of constant stirring, spray water into the fly ash, the water is completely absorbed by the fly ash, the amount of water added is 35% of the total weight of the fly ash, and the average particle size of the fly ash 25μm, the fly ash is Class I fly ash, and the fly ash is selected from Chengdu Junrui Building Materials Co., Ltd.;

[0056] B. Under the conditions of constant stirring and a temperature of 110°C, carry out constant temperature treatment on the fly ash in step A, most of the water in the fly ash will volatilize, and a small amount of water will remain in the fly ash, and the fly ash The water content reaches 5wt%;

[0057] C. Under nitrogen protection and a temperature of 550°C, roast the fly ash in step B. The residual water in the fly ash increases the hydroxyl content on the sur...

Embodiment 3

[0063] A method for preparing high-strength lightweight aggregate concrete, the ratio of raw materials is shown in Table 1.

[0064] S1. Pretreatment of fly ash

[0065] A. In the case of constant stirring, spray water into the fly ash, the water is completely absorbed by the fly ash, the amount of water added is 35% of the total weight of the fly ash, and the average particle size of the fly ash 23μm, the fly ash is Class I fly ash, and the fly ash is selected from Chengdu Junrui Building Materials Co., Ltd.;

[0066] B. Under the conditions of constant stirring and a temperature of 115°C, carry out constant temperature treatment on the fly ash in step A, most of the water in the fly ash will volatilize, and a small amount of water will remain in the fly ash, and the fly ash The water content reaches 4wt%;

[0067] C. Under nitrogen protection and a temperature of 530°C, roast the fly ash in step B. The residual water in the fly ash increases the hydroxyl content on the sur...

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Abstract

The invention relates to a preparation method of high-strength light aggregate concrete, which belongs to the technical field of light aggregate concrete, and includes the pretreatment of fly ash and the preparation of light aggregate concrete. In the pretreatment of fly ash, spray water on the fly ash, and roast and activate the fly ash, introduce more hydroxyl groups on the fly ash, and improve the activity of the fly ash, which not only increases the The early strength of the aggregate concrete, but also has a higher later strength, and has the advantages of pumping stability. In the high-strength lightweight aggregate concrete pumping process, the light aggregate concrete is stirred inside the output end of the pipeline to reduce the light weight. Aggregate concrete hangs on the wall in the pipeline, which improves the stability of light aggregate concrete pumping.

Description

technical field [0001] The invention relates to the technical field of lightweight aggregate concrete, more specifically, it relates to a preparation method and pumping process of high-strength lightweight aggregate concrete. Background technique [0002] Light aggregate concrete is prepared from light coarse aggregate, fine aggregate, cement, fly ash, and water. It has the advantages of light weight, high strength, heat preservation, and sound insulation, and is widely used in various non-load-bearing structures. In the construction of long-span and high-rise buildings, the pumping distance of light aggregate concrete is long, the pumping height is large, and the pumping time is long. Therefore, the concrete needs to maintain good workability and homogeneity during the entire pumping process. [0003] At present, the patent document with the authorized notification number CN104591620B discloses a light aggregate concrete suitable for high-distance pumping, which is prepared...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00146C04B2201/50C04B18/027C04B14/06C04B18/08C04B18/141C04B16/0633C04B14/48C04B14/305C04B24/42C04B2103/302C04B24/383C04B18/26C04B24/20C04B24/34
Inventor 罗杨邓小飞张伟
Owner 泸州临港思源混凝土有限公司
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