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A high temperature resistant concrete

A technology of high temperature resistance and concrete, applied in the field of concrete, can solve the problems of life and property safety damage, deterioration of mechanical and durability performance, threat to structural safety, etc., to achieve good mechanical properties, improve high temperature resistance and fire resistance, and enhance connection Effect

Active Publication Date: 2019-05-24
广东信强混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, civil engineering structures have higher and higher requirements for the strength and durability of concrete, and the improvement of strength and durability comes from the continuous improvement of the density of concrete itself, and the internal dense concrete will be severely burst when it is subjected to the high temperature of fire. After high temperature, the mechanical and durable properties of concrete are seriously deteriorated, which not only threatens the safety of the structure, but also causes immeasurable damage to the safety of human life and property.

Method used

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  • A high temperature resistant concrete
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: A kind of high temperature resistant concrete, each component and its content are shown in Table 1 in parts by weight. The nano-fiber is selected from nano-carbon fiber, and the nano-porous material is selected from silicon oxide nano-porous material. Aggregate includes 1000 parts of coarse aggregate and 400 parts of fine aggregate. The coarse aggregate is gravel with a particle size of 5-20mm and continuous gradation, and the fine aggregate is river sand with a fineness modulus of 2.6. The admixture is nano calcium carbonate.

[0026] The preparation method of high-temperature resistant concrete is as follows: weigh nanofibers, nanoporous materials, water, and admixtures, stir them evenly, and use ultrasonic treatment for 1 hour. After uniformity, high temperature resistant concrete is obtained.

[0027] Mechanical performance test of concrete after high temperature: The high temperature resistant concrete is made into multiple cube test blocks with a ...

Embodiment 2

[0028] Example 2: A high temperature resistant concrete, the difference from Example 1 is that the components and contents are shown in Table 1, and the aggregate includes 1000 parts of coarse aggregate and 300 parts of fine aggregate. The mechanical properties of concrete after high temperature were tested, and the results are listed in Table 2.

Embodiment 3

[0029] Example 3: A high temperature resistant concrete, the difference from Example 1 is that the components and contents are shown in Table 1, and the aggregate includes 1100 parts of coarse aggregate and 400 parts of fine aggregate. The mechanical properties of concrete after high temperature were tested, and the results are listed in Table 2.

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Abstract

The invention discloses a high temperature resistant concrete. The high temperature resistant concrete is prepared from the following components: 1300 to 1500 parts of coarse aggregates; 450 to 550 parts of cement; 100 to 130 parts of water; 20 to 50 parts of admixtures; 50 to 100 parts of nano porous materials and 100 to 180 parts of nanofibers. The high temperature resistant concrete has the following advantages and effects that: firstly, aggregates, the cement and the water are used as the main materials of the high temperature resistant concrete, the nano porous materials and the nanofibers are added, the nanofibers are connected through the nano porous materials to form a network structure, the high temperature resistant concrete does not burst when the concrete is exposed to fire and has good mechanical properties; secondly, the admixtures is added, the admixtures are nano-titanium dioxide and nano-calcium carbonate, so that the mechanical properties of high temperature resistant concrete are improved, the connection between the nanofibers and the nano porous materials is enhanced, the high temperature resistant performance and fire resistance of the high temperature resistant concrete are further improved, and the effects of strong high temperature resistant performancece and fire resistance are achieved.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a high temperature resistant concrete. Background technique [0002] With the economic development and social progress and the continuous increase of population, buildings are becoming denser and high-rise buildings are developing rapidly, and the fire problem of building structures is becoming more and more prominent. Among all kinds of fires, the ones with the largest number of occurrences and the most serious losses are building fires. Concrete is currently the most widely used building material in civil engineering, and concrete structures are the main structural form of buildings. Therefore, the high temperature performance of concrete is crucial to the fire behavior of buildings. At present, civil engineering structures have higher and higher requirements for the strength and durability of concrete, and the improvement of strength and durability comes from the continuous improvemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B111/28
CPCC04B28/00C04B2111/28C04B2201/50C04B2201/52C04B14/386C04B20/006C04B14/062C04B14/02C04B14/068C04B14/28C04B20/008
Inventor 区文光
Owner 广东信强混凝土有限公司