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A high-strength self-healing concrete

A concrete, high-strength technology, applied in the field of building materials, can solve the problems of difficult control of microbial metabolism, poor crack repair effect, poor concrete strength, etc., to improve self-healing ability, prolong repair time, excellent durability and compactness Effect

Active Publication Date: 2021-10-01
KUNMING SHUNHONG CEMENT PIPE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microbes metabolize in a humid environment to produce urease, which is then hydrolyzed into ammonia and carbon dioxide. Carbon dioxide reacts with calcium ions dissolved in the voids in concrete to form calcium carbonate precipitates. However, the metabolic rate of microorganisms in the prior art is difficult to control. Repair The efficiency is usually very low, and the repair effect of cracks with large crack width is poor, and the strength of the repaired concrete is poor

Method used

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  • A high-strength self-healing concrete
  • A high-strength self-healing concrete

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This embodiment provides a kind of high-strength self-healing concrete, and the weight part of raw material of this concrete consists of: Portland cement 100kg, water 30kg, carbon dioxide foaming agent 10kg, dispersant 20kg, aggregate 55kg, microbial compound 20kg , Modified fiber composite 20kg, phenolic antioxidant 1kg, octadecanoic acid 1kg, modified piperylene petroleum resin 4kg.

[0036] It should be noted,

[0037] 1. Dispersant

[0038] The dispersant is composed of guar gum hydroxypropyltrimethylammonium chloride, colloidal silica, diatomaceous earth, silicon carbide powder, fly ash and phenolic resin in a weight ratio of 2:2:8:5:3:10 Composition; The preparation method of described dispersion agent comprises:

[0039] a, 2 parts of guar gum hydroxypropyl trimethylammonium chloride are uniformly dispersed in water by weight, and stirred evenly to obtain solution A, the water content of solution A is 80%;

[0040] b. Evenly disperse 2 parts of colloidal silic...

Embodiment 2

[0062] This embodiment provides a kind of high-strength self-healing concrete, and the weight part of raw material of this concrete is composed of: Portland cement 110kg, water 40kg, carbon dioxide foaming agent 15kg, dispersant 25kg, aggregate 60kg, microbial compound 25kg , Modified fiber composite 25kg, phenolic antioxidant 2kg, octadecanoic acid 2kg, modified piperylene petroleum resin 6kg.

[0063] The preparation method of each raw material and concrete in embodiment 2 is exactly the same as embodiment 1.

Embodiment 3

[0065] This embodiment provides a high-strength self-healing concrete. The raw materials of the concrete are composed in parts by weight of: Portland cement 120kg, water 50kg, carbon dioxide foaming agent 20kg, dispersant 30kg, aggregate 65kg, microbial composite 30kg , Modified fiber composite 30kg, phenolic antioxidant 3kg, octadecanoic acid 3kg, modified piperylene petroleum resin 8kg.

[0066] The preparation method of each raw material and concrete in embodiment 2 is exactly the same as embodiment 1.

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Abstract

The invention provides a high-strength self-healing concrete. The raw materials of the concrete are composed in parts by weight: 100-120 parts of Portland cement, 30-50 parts of water, 10-20 parts of carbon dioxide foaming agent, and 20-20 parts of dispersant 30 parts, 55-65 parts of aggregate, 20-30 parts of microbial compound, 20-30 parts of modified fiber compound, 1-3 parts of phenolic antioxidant, 1-3 parts of octadecanoic acid, modified room Pentadiene petroleum resin 4‑8 parts. The high-strength self-healing concrete provided by the invention increases the flexural and compressive strength to a certain extent through the specific proportion and preparation method, and also improves the self-repairing ability of the concrete, prolongs the repairing time of the concrete, and has a more Strong durability and compactness, high recovery rate of concrete strength after repair, it can be seen from the above examples and comparative examples that there is synergy between the components of the high-strength self-healing concrete of the present invention, when any component is replaced , the flexural and compressive strength of concrete decreased significantly, and the recovery rate also decreased significantly.

Description

【Technical field】 [0001] The invention relates to the technical field of building materials, in particular to a high-strength self-healing concrete. 【Background technique】 [0002] Concrete is now a widely used building material, but it will be damaged and produce micro-cracks under the action of force or other factors during use. These damages are invisible, but if they cannot be repaired in time, the mechanical properties of concrete will be reduced, and even Macroscopic cracks may be induced, allowing water to infiltrate and lead to corrosion of steel bars, reducing the earthquake resistance and service life of concrete structures. [0003] In order to realize the repair of concrete cracks, the self-repair of microbial cracks is widely studied. Microorganisms use biological action to form some organic and inorganic compounds with low solubility to fill the porous medium with permeability, so as to reduce the permeability and fill the cracks. Microbes metabolize in a humi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B38/02
CPCC04B28/04C04B2201/20C04B2201/50C04B2201/52C04B24/38C04B14/062C04B14/08C04B14/324C04B18/08C04B24/302C04B14/18C04B24/383C04B24/2652C04B2103/0001C04B16/0633C04B18/24C04B24/02C04B24/04C04B24/26C04B24/003C04B24/2664C04B2103/42C04B38/02
Inventor 王静
Owner KUNMING SHUNHONG CEMENT PIPE PROD
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