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Concrete pavement apparent damage repairing and efficient curing material and preparation method thereof

A technology for pavement appearance and damage repair, applied in solid waste management, sustainable waste treatment, climate sustainability, etc. The effect of quickly repairing cracks

Active Publication Date: 2021-12-03
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Later, the use of microcapsule technology was developed to protect bacteria. However, after the microcapsules carrying bacteria are embedded in concrete, the shell of the microcapsules cannot completely isolate the bacteria from the concrete, and the bacteria will still be damaged during the mixing and curing of the concrete. mineralization activity

Method used

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  • Concrete pavement apparent damage repairing and efficient curing material and preparation method thereof
  • Concrete pavement apparent damage repairing and efficient curing material and preparation method thereof
  • Concrete pavement apparent damage repairing and efficient curing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of efficient solidified microcapsules: Add 10 parts of urea, 0.25 parts of ammonium chloride and 5 parts of sodium silicate to 30 parts of water, stir well to obtain the water phase; add 2 parts of oleic acid to 20 parts of Alkalophilic Bacillus subtilis spore powder and 3 parts of calcium lactate, stirred evenly, then added dropwise to the water phase, stirring at the same time during the dropping process, the stirring speed was 300rpm, to obtain an O / W emulsion, added 10 parts of formaldehyde, and reacted After 5 hours, filter, wash with distilled water, and dry naturally to obtain high-efficiency solidified microcapsules.

[0036] (2) Repair of apparent damage of concrete pavement and preparation of high-efficiency curing materials: take 300 parts of 42.5R ordinary Portland cement, 850 parts of gravel (coarse aggregate) with a particle size of ≤25mm, and river sand with a particle size of ≤2.5mm (fine aggregate) 500 parts, 90 parts of steel fiber with a...

Embodiment 2

[0038] (1) Preparation of efficient solidified microcapsules: Add 10 parts of urea, 0.25 parts of ammonium chloride and 4 parts of sodium silicate to 30 parts of water, stir well to obtain the water phase; add 2 parts of oleic acid to 20 parts of Alkalophilic Bacillus coli spore powder and 4 parts of calcium lactate, stirred evenly, then added dropwise to the water phase, stirring at the same time during the dropping process, the stirring speed was 300rpm, to obtain an O / W emulsion, adding 10 parts of formaldehyde, React for 4 hours, filter, wash with distilled water, and dry naturally to obtain highly effective solidified microcapsules.

[0039] (2) Repair of apparent damage of concrete pavement and preparation of high-efficiency curing materials: Take 350 parts of 42.5R fly ash Portland cement, 800 parts of crushed stone (coarse aggregate) with a particle size of ≤25mm, and a particle size of ≤2.5 550 parts of river sand (fine aggregate), 100 parts of steel fiber with a leng...

Embodiment 3

[0041] (1) Preparation of high-efficiency solidified microcapsules: add 10 parts of urea, 0.25 parts of ammonium chloride and 2.5 parts of sodium silicate to 30 parts of water, stir well to obtain the water phase; add 2.5 parts of oleic acid to 20 parts Alkalophilic Bacillus Pasteurella spore powder and 5 parts of calcium lactate, stirred evenly, and then added dropwise to the water phase, stirring at the same time during the dropping process, the stirring speed was 300rpm, to obtain an O / W emulsion, adding 10 parts of formaldehyde, React for 5 hours, filter, wash with distilled water, and dry naturally to obtain high-efficiency solidified microcapsules.

[0042] (2) Repair of apparent damage of concrete pavement and preparation of high-efficiency curing materials: take 330 parts of 42.5R slag Portland cement, 900 parts of crushed stone (coarse aggregate) with a particle size of ≤25mm, and river sand with a particle size of ≤2.5mm (fine aggregate) 600 parts, 80 parts of steel ...

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Abstract

The invention discloses a concrete pavement apparent damage repairing and efficient curing material and a preparation method thereof, and belongs to the technical field of self-repairing concrete. The concrete pavement apparent damage repairing and efficient curing material is prepared from the following raw materials: Portland cement, coarse aggregate, fine aggregate, a water reducing agent, water, high-tensile-strength fibers and efficient curing microcapsules, wherein the wall material of the efficient curing microcapsule is active silicate-urea resin, and the core material of the efficient curing microcapsule is basophilic bacillus spores and calcium lactate. By adding the microcapsules containing the basophilic bacillus spores and the calcium lactate into the concrete, the apparent defects occurring in the concrete paving process can be repaired. Meanwhile, the structure of the microcapsule is designed, the shell of the microcapsule is cured, basophilic bacillus spores in the microcapsule are better protected, and when the prepared concrete cracks again in the later period, alcohol-containing liquid is sprayed on the surface of the cracks, the core material in the microcapsule is rapidly released, and the rapid repairing effect is achieved.

Description

technical field [0001] The invention relates to the technical field of self-repairing concrete, in particular to a concrete pavement apparent damage repairing and high-efficiency curing material and a preparation method thereof. Background technique [0002] Concrete is an important building material and an essential component of public infrastructure and most buildings. Its tensile strength is much lower than its compressive strength, and to increase its strength, it is usually reinforced with steel bars. Concrete is also a very brittle material with low tolerance to strain and tends to crack after a certain period of time. Micro-cracks will not only reduce the integrity of the concrete itself, but more importantly, micro-cracks may expose the steel bars buried in the concrete, allowing oxidized and corrosive substances to enter. When steel bars come into contact with water and oxygen, they are prone to rust and produce iron oxide. The oxidized steel expands in volume, s...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B24/30C04B41/62
CPCC04B28/04C04B40/0039C04B41/62C04B41/009C04B41/463C04B18/12C04B14/068C04B2103/302C04B14/48C04B24/307C04B12/04C04B24/06C04B2103/0001C04B41/4535Y02W30/91
Inventor 李思李田波谢晋德权磊李立辉张盼盼何哲
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT