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Cement-based repair mortar composition and preparation method thereof

A cement-based, composite technology, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve problems such as deterioration, easy generation of looseness, spalling, accelerated durability of concrete, etc. The effect of strong impact deformation resistance, enhanced bond strength and flexural strength

Active Publication Date: 2022-06-21
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] Example 1: A cement-based repair mortar enhancer formula:

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

[0069] Wherein, the modified plant fiber is carboxy mulberry fiber grafted silk fibroin with a graft ratio of ≥25%, and the preparation method includes:

[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 the reaction under the conditions of 80°C for 3h, 120°C for 2h, and 130°C for 6h under nitrogen protection, and the reaction ends. After cooling to room temperature, washing with ethyl acetate, rotary evaporation at 50 °C for 2.5 h, and vacuum drying at 65 °C for 12 h;

[0071]2) Pretreatment of mulberry fiber: under the aid of 22.5kHz, 16...

Embodiment 2

[0083] Example 2: A 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 cement-based repair mortar reinforcing agent described in Example 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 fast-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 includes:

[0093] 1) form a hydraulic composition, which includes the cement, fine aggregate and nano-SiO described in this e...

Embodiment 3

[0096] Example 3: Another cement-based repair mortar composition formulation:

[0097] This embodiment provides another cement-based repair mortar composition, the composition 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 Example 1;

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

[0102] 60 parts by weight of water;

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

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

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

[0106] Organosilicon defoamer, the amount of which is 0.12wt% of the cement-based repair mortar composition;

[0107] Wherein, the cement includes 60.0wt% Portland ce...

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Abstract

The present invention relates to a cement-based repair mortar composition and its preparation method. First, the application provides a cement-based repair mortar reinforcing agent, which includes modified plant fiber and water-based epoxy Resin and ester polycarboxylate water reducer. Secondly, the application also provides a cement-based repair mortar composition and its preparation method. The composition contains cement, fine aggregate, the above-mentioned cement-based repair mortar enhancer, nano SiO 2 and water. This application contains modified plant fiber, water-based epoxy resin and polycarboxylate water-reducing agent ternary structure reinforcing agent, which can play a role similar to anti-cracking fiber in cement-based repair mortar composition, and realize micro-expansion of cement mortar , to achieve dense filling and anti-shrinkage, has the characteristics of strong hydrophobicity, waterproof and anti-corrosion, excellent wear resistance, strong impact resistance and deformation resistance, making repair mortar suitable for applications in reinforcement, waterproof, anti-corrosion, flooring and other fields.

Description

technical field [0001] The present 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 action of loads and external factors, the surface of the concrete structure 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. Accidents of failure of concrete structures due to cracking, denudation, 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 the construction of new buildings. In the United St...

Claims

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Application Information

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Patent Type & Authority Patents(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
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