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Cement-based repair mortar composition and preparation method thereof

A cement-based and composite technology, applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of accelerated durability, deterioration, easy generation of looseness, spalling, etc. of concrete, to prevent cracking, enhance Strong and anti-cracking effect

Active Publication Date: 2020-02-21
金隅台泥(代县)环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the service period of the concrete structure, due to the load and external factors, the surface is prone to defects such as looseness and spalling, and even micro-cracks inside the material. Gradual penetration will eventually cause accelerated deterioration of concrete durability

Method used

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  • Cement-based repair mortar composition and preparation method thereof
  • Cement-based repair mortar composition and preparation method thereof
  • Cement-based repair mortar composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1: A kind of cement-based repair mortar reinforcing agent formula:

[0068] This embodiment provides a cement-based repair mortar reinforcing agent formula, the reinforcing agent includes modified plant fiber, water-based epoxy resin and ester polycarboxylate water reducing agent in a weight ratio of 1:0.4:0.6.

[0069] Wherein, the modified plant fiber is a carboxylated mulberry fiber grafted silk fiber with a grafting rate ≥ 25%, and its preparation method comprises:

[0070] 1) Preparation of ionic liquid: Accurately weigh triethyl phosphate and 1-ethylimidazole according to the weight ratio of 2.2:1, heat and stir under the conditions of 80°C for 3h, 120°C for 2h, and 130°C for 6h under nitrogen protection, and the reaction is over. After cooling to room temperature, wash with ethyl acetate, remove impurities by rotary evaporation at 50°C for 2.5h, and vacuum dry at 65°C for 12h;

[0071]2) Pretreatment of mulberry fiber: under the assistance of 22.5kH...

Embodiment 2

[0083] Embodiment 2: a kind of cement-based repair mortar composition formula:

[0084] A cement-based repair mortar composition, the composition contains

[0085] 125 parts by weight of cement;

[0086] 100 parts by weight of fine aggregate;

[0087] 15.0 parts by weight of the cement-based repair mortar reinforcing agent described in embodiment 1;

[0088] nano-SiO 2 2.0 parts by weight;

[0089] 50 parts by weight of water;

[0090] Wherein, the cement includes 50.0wt% of 42.5 Portland cement, 37.5wt% of rapid hardening sulfoaluminate cement and 12.5wt% of fly ash, and the fly ash is Class II fly ash, which is burnt Loss ≤ 8%, fineness ≤ 20%, activity index 28d ≥ 70%;

[0091] Wherein, the fine aggregate is a mixture of 40-mesh river sand and 80-mesh sea sand.

[0092] The method for preparing the cement-based repair mortar composition described in this embodiment comprises:

[0093] 1) Form a hydraulic composition, which includes cement, fine aggregate and nano-S...

Embodiment 3

[0096] Embodiment 3: another kind of cement-based repair mortar composition formula:

[0097] This embodiment provides another cement-based repair mortar composition, which contains

[0098] 120 parts by weight of cement;

[0099] 120 parts by weight of fine aggregate;

[0100] 20 parts by weight of cement-based repair mortar reinforcing agent described in embodiment 1;

[0101] nano-SiO 2 1.5 parts by weight;

[0102] 60 parts by weight of water;

[0103] Waterproofing agent aluminum chloride, its addition is 0.01wt% of cement-based repair mortar composition;

[0104] Stabilizer CaCl 2 , and its addition amount is 0.1wt% of the cement-based repair mortar composition.

[0105] Redispersible latex powder, its addition is 0.2wt% of cement-based repair mortar composition;

[0106] Organosilicon defoamer, its addition is 0.12wt% of cement-based repair mortar composition;

[0107] Wherein, the cement includes 60.0wt% Portland cement, 31.5wt% sulfur-aluminum cement and 8....

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Abstract

The invention relates to a cement-based repair mortar composition and a preparation method thereof. Firstly, the application provides a cement-based repair mortar reinforcing agent, and the reinforcing agent comprises a modified plant fiber, a waterborne epoxy resin, and an ester-based polycarboxylic acid water reducing agent in a weight ratio of 1:0.25-0.5:0.45-0.75. Secondly, the application also provides the cement-based repair mortar composition and the preparation method thereof, and the composition comprises cement, a fine aggregate, the cement-based repair mortar reinforcing agent, nano-SiO2 and water. The ternary structure reinforcing agent comprising the modified plant fiber, the waterborne epoxy resin, and the polycarboxylic acid water reducing agent in the cement-based repair mortar composition can play a role similar to anti-cracking fibers, micro-expansion of the cement mortar is realized, the effects of compact filling and anti-shrinkage are achieved, and the reinforcingagent has the characteristics of strong hydrophobicity, waterproofing and anticorrosion, excellent wear resistance, and strong resistance to impact and deformation, so that the repair mortar is suitable for application in the fields such as reinforcement, waterproofing, anticorrosion, and floors.

Description

technical field [0001] The invention relates to a cement-based repair mortar composition and a preparation method thereof. Background technique [0002] During the service period of the concrete structure, due to the load and external factors, the surface is prone to defects such as looseness and spalling, and even micro-cracks inside the material. Gradual infiltration will eventually cause accelerated deterioration of concrete durability. Accidents of concrete structures failing due to cracking, erosion, loosening and other reasons occur frequently. In today's world, structural failures or building function failures caused by various reasons not only affect people's normal life but also cause huge economic losses. Industrially developed countries More than 40% of the total construction investment is used for building repair and reinforcement, and less than 60% is used for new building construction. In the United States, 40% of the bridges have been severely damaged, while...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B20/02C04B18/24C04B111/20C04B111/72
CPCC04B28/06C04B20/023C04B2111/72C04B2201/50C04B2201/10C04B2111/2015C04B7/02C04B18/08C04B24/2694C04B14/062C04B18/248C04B24/281C04B14/06C04B22/12C04B22/124C04B24/26C04B2103/50Y02W30/91
Inventor 王九龙马树立陈敬张宇刘银海王玉和王营和吴建军李广宁
Owner 金隅台泥(代县)环保科技有限公司