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Smart component hybrid fiber concrete and preparation method thereof

A hybrid fiber and concrete technology, applied in the field of concrete, can solve the problems of low compressive and flexural strength, lack of self-testing ability, and inability to objectively monitor the stress of concrete, so as to improve the compressive strength and flexural strength. Strength, improving safety and durability, preventing crack propagation

Active Publication Date: 2021-03-19
广州市圣丰混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concrete obtained by this invention does not contain silica fume and has high impermeability, but its compressive strength and flexural strength are low, and it does not have the ability of self-detection, so it is impossible to objectively monitor the stress of concrete

Method used

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  • Smart component hybrid fiber concrete and preparation method thereof
  • Smart component hybrid fiber concrete and preparation method thereof
  • Smart component hybrid fiber concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a kind of smart composite fiber concrete, which includes the components shown in Table 1.

[0028] Table 1. Concrete mix ratio (kg / m) described in embodiment 1 3 )

[0029] water cement fly ash Machine-made sand BF PF Superplasticizer 1~2 stone 1~3 stones 146 429 58 743 1.05 0.18 15.58 700 299

[0030] Among them, the water-binder ratio of the concrete is 0.3; the cement uses type II Portland cement, and the strength grade is 52.5; the diameter of the basalt fiber monofilament is 9-17 μm, and the length is 15 mm; the diameter of the polypropylene fiber monofilament is 18-48 μm, the length 12mm; the fly ash adopts Class F and Class II; the water reducing agent adopts polycarboxylic acid with a concentration of 10% and a water reducing rate of 20-30%.

[0031] The preparation method of smartly forming hybrid fiber concrete described in the present embodiment may further comprise the steps:

[0032] S1. ...

Embodiment 2～6

[0036] The difference between Examples 2-6 and Example 1 is that the distribution ratio of each component is different. Table 2 shows the dosage of raw materials for the smart composite fiber concrete described in Examples 2 to 6.

[0037] Table 2. Concrete mix ratio (kg / m) described in embodiment 2~6 3 )

[0038]

[0039] The preparation method of the smart composite fiber concrete described in Examples 2-7 is consistent with that of Example 1, and the arrangement of smart materials is consistent with that of Example 1.

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Abstract

The invention discloses a smart component hybrid fiber concrete and a preparation method thereof. The concrete comprises the following components by weight: 138-151kg / m<3> of water, 379-458kg / m<3> ofcement, 52-60kg / m<3> of fly ash, 683-790kg / m<3> of machine-made sand, 999-1028kg / m<3> of coarse aggregate, 1.03-2.93kg / m<3> of basalt fiber and polypropylene fiber, and 12.66-21.92kg / m<3> of a water reducing agent; the concrete also comprises a smart material embedded in the concrete or a stress-strain gauge adhered to the surface of the concrete; after the smart material is embedded, a to-be-detected part is exposed on the surface of the concrete. The basalt fiber and the polypropylene fiber in a specific proportion are doped, so that the compressive strength and the breaking strength of theconcrete are improved, meanwhile, corresponding smart elements are prepared, the damage condition of the internal structure of the concrete is monitored, and the safety and the durability of the concrete structure are improved.

Description

technical field [0001] The invention relates to the technical field of concrete, and more particularly relates to a kind of smart composite fiber concrete and a preparation method thereof. Background technique [0002] With the improvement of concrete grade requirements in modern buildings, ordinary concrete has been gradually replaced by fiber-reinforced concrete. The incorporation of fibers can improve the toughness, strength and crack resistance of cement-based composites, so the development of fiber-reinforced concrete has become one of the research directions of high-performance concrete. Chinese invention patent CN111662053A discloses (disclosure date: September 15, 2020) a polypropylene fiber concrete, which is mainly composed of water, cement, fine aggregate, coarse aggregate, fly ash, polypropylene fiber, sulfur aluminum Calcium acid expansion agent and water reducer. The concrete obtained by this invention does not contain silica fume and has high impermeability,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/34C04B14/46C04B16/06C04B14/38C04B14/42
CPCC04B28/04C04B2201/50C04B2201/52C04B2111/343C04B2111/00991C04B18/08C04B14/06C04B14/02C04B14/4656C04B16/0633C04B2103/302C04B14/386C04B14/42
Inventor 姚立宁张颖发林业斌姜华曾钰张爱青刘子健吴永明陈布希
Owner 广州市圣丰混凝土有限公司