High-strength heat-resistant concrete and preparation method thereof

A heat-resistant concrete, high-strength technology, applied in the field of building materials, can solve problems such as unfavorable durability, low flexural strength, and reduced strength, achieve good impermeability, improve mechanical properties and heat resistance, and improve later strength. Effect

Inactive Publication Date: 2019-04-05
江苏盛达飞建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, ordinary concrete cannot meet the requirements of these projects, and heat-resistant concrete must be used
[0003] At present, high-temperature-resistant concrete usually uses cement or water glass as the cementitious material, and uses broken magnesia bricks, sintered magnesia, refractory broken bricks, clay clinker, etc. Low, usually lower than C20; at the same time, broken refractory bricks, broken magnesia bricks, etc. are coarse aggrega

Method used

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  • High-strength heat-resistant concrete and preparation method thereof
  • High-strength heat-resistant concrete and preparation method thereof
  • High-strength heat-resistant concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1-3

[0041] In the preparation example 1-3, the sodium silicate is selected from the sodium silicate sold by Jinan Xinsenyuan Chemical Co., Ltd. with the product number of 668, and the calcium formate is selected from the HBL-J30 calcium formate and magnesium oxide sold by Zhengzhou Hongboli Chemical Products Co., Ltd. Choose from ZH-V3H type magnesium oxide sold by Suzhou Zemei New Material Technology Co., Ltd., acrylate emulsion from BA-201 type acrylate emulsion sold by Jining Baichuan Chemical Co., Ltd., lead-free low-melting glass powder from Guangzhou Song The D240, D250 and D270 lead-free low-melting glass powders sold by Liner New Materials Co., Ltd., the steel slag powder is selected from the steel slag powder with the item number 05 sold by Lingshou County Bailing Mineral Products Processing Factory, and the rubber powder is selected from Huayi, Dujiangyan City The rubber powder sold by Rubber Co., Ltd. is xjf-003, and the montmorillonite is selected from the WSG-PN06 plas...

preparation example 1

[0042] Preparation Example 1: (1) According to the proportioning in Table 1, heat 20kg of deionized water to 80°C, add 5kg of calcium formate, 3kg of sodium silicate and 10kg of magnesium oxide to the deionized water, at a speed of 600r / min Stir for 20min and keep warm at 80°C for 1h; (2) Stir 30kg steel slag powder, 15kg rubber powder, 8kg montmorillonite and 10kg lead-free low-melting glass powder at 1000r / min for 2h, the particle size of steel slag powder is 5- 15cm continuous gradation, the particle size of rubber powder is 20mm, the particle size of montmorillonite is 25mm, the particle size of lead-free low-melting glass powder is 1μm, and the melting point is 400℃;

[0043] (3) Add the result of step (1) to 50kg of acrylate emulsion, stir at 1000r / min for 40min, then add the result of step (2), and ultrasonically disperse for 30min, the ultrasonic dispersion power is 35kW.

[0044] The raw material ratio of early strength agent in table 1 preparation example 1-3

[004...

preparation example 2

[0046] Preparation Example 2: (1) According to the proportioning in Table 1, heat 30kg of deionized water to 85°C, add 8kg of calcium formate, 6kg of sodium silicate and 13kg of magnesia to the deionized water, at a speed of 700r / min Stir for 25 minutes and keep warm at 85°C for 1.5 hours;

[0047] (2) Stir 40kg steel slag powder, 18kg rubber powder, 12kg montmorillonite and 11kg lead-free low-melting glass powder at 1200r / min for 2.5h, the particle size of steel slag powder is a continuous gradation of 5-15cm, the rubber powder The particle size is 25mm, the particle size of montmorillonite is 25mm, the particle size of lead-free low-melting glass powder is 5μm, and the melting point is 500°C;

[0048] (3) Add the result of step (1) to 65kg of acrylate emulsion, stir at 1300r / min for 50min, then add the result of step (2), and ultrasonically disperse for 35min, the ultrasonic dispersion power is 40kW.

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Abstract

The invention discloses a high-strength heat-resistant concrete and a preparation method thereof. The high-strength heat-resistant concrete comprises the following components in parts by weight: 300 to 350 parts of cement, 800 to 1100 parts of coarse aggregates, 400 to 500 parts of fine aggregates, 80 to 100 parts of coal ash, 5 to 10 parts of water reduction agent, 100 to 150 parts of mineral powder, 700 to 900 parts of gravels, 20 to 40 parts of early strengthening agent, 180 to 200 parts of water, 10 to 20 parts of steel fibers, and 5 to 10 parts of antirust agent; the coarse aggregates areprepared by mixing ceramic micro powder, blast furnace slag and basalt in a weight ratio of 1: (10 to 15): (30 to 50); and the fine aggregates are prepared by mixing 20 to 40 parts of silica fume, 10to 20 parts of expanded perlite and 15 to 30 parts of sintered magnesite. The high-strength heat-resistant concrete has the advantages of good compactness, high strength, high heat resistance, good workability and pumpability.

Description

technical field [0001] The invention relates to the technical field of building materials, more specifically, it relates to a high-strength heat-resistant concrete and a preparation method thereof. Background technique [0002] Heat-resistant concrete is a special concrete that can withstand high temperature (above 200°C) for a long time and maintain the required physical and mechanical properties under high temperature. Heat-resistant concrete is mainly used in industrial kiln foundations, shells, chimneys, and atomic energy pressure vessels. It not only withstands high temperatures for a long time, but also withstands repeated temperature changes of heating and cooling. Ordinary traditional concrete is a cementitious material composed of cement. Sand and stone are used as aggregates, and artificial stone is prepared by adding admixtures and admixtures. When the ambient temperature exceeds 300 ° C, its strength drops sharply. This is Because the hydration products in cemen...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/763C04B2201/50C04B18/141C04B18/165C04B14/14C04B14/185C04B18/023C04B18/146C04B18/08C04B14/48C04B14/02C04B2103/302C04B2103/61C04B2103/10
Inventor 时兆武
Owner 江苏盛达飞建筑材料有限公司
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