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Concrete repairing dry-mixed mortar and preparation method thereof

A technology for dry-mixing mortar and concrete, which is applied in the field of preparation of the mortar, can solve the problems of poor corrosion resistance, poor construction performance, short service life, etc., and achieves the effects of strong structure, improved adhesion and reliable performance.

Active Publication Date: 2016-08-31
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used repair mortars are mainly inorganic cement mortar, organic resin mortar and polymer mortar; among them, inorganic cement mortar has poor adhesion to old concrete components and has a short service life; although organic resin mortar is attached to old concrete The strength is better, but the price is higher, and the construction performance and corrosion resistance are poor; the polymer mortar is made by adding rubber powder on the basis of inorganic cement mortar. Although the construction performance is good, its crack resistance is relatively poor. Difference

Method used

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  • Concrete repairing dry-mixed mortar and preparation method thereof
  • Concrete repairing dry-mixed mortar and preparation method thereof
  • Concrete repairing dry-mixed mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Concrete repair dry mix mortar of the present embodiment, the mass parts of each component are as follows:

[0042]

[0043]

[0044] Preparation Process:

[0045] A. Raw material preparation: Weigh Portland cement, ferroaluminate cement, fine aggregate, fly ash, micro silica fume, cellulose ether, starch ether, anti-cracking fiber, water reducer and expansion agent in order by mass parts ;

[0046] B. Stirring: Weigh Portland cement, aluminate iron cement, fine aggregate, fly ash, micro silica fume, cellulose ether, starch ether, anti-cracking fiber, water reducing agent and swelling Add the agent into the dry powder mortar mixer one by one and stir for 15 to 20 minutes until they are evenly mixed.

[0047] Prepare concrete repair dry-mix mortar according to the above preparation process, and add appropriate amount of water. Form and maintain a prism specimen of 40mm×40mm×160mm according to the regulations of DL / T5126-2001 of "Test Regulations for Polymer Modi...

Embodiment 2

[0051] Concrete repair dry mix mortar of the present embodiment, the mass parts of each component are as follows:

[0052]

[0053]

[0054] Preparation process is with embodiment 1.

[0055] Prepare concrete repair dry-mix mortar according to the above preparation process, and add appropriate amount of water. Form and maintain a prism specimen of 40mm×40mm×160mm according to the regulations of DL / T5126-2001 of "Test Regulations for Polymer Modified Cement Mortar", and measure the 7-day compressive strength and 28-day flexural strength of the mortar according to the test procedures specified in the specification , compressive strength; according to the "polymer modified cement mortar test procedures" DL / T5126-2001 regulations forming and curing bonded tensile test specimen, the upper part of the test specimen is the tested mortar, its size is 40mm × 40mm × 10mm, The lower part is ordinary mortar, the size of the base block is 70mm×70mm×20mm, the mix ratio of the mortar ...

Embodiment 3

[0059] Concrete repair dry mix mortar of the present embodiment, the mass parts of each component are as follows:

[0060]

[0061]

[0062] The preparation process is the same as in Example 1.

[0063]Prepare concrete repair dry-mix mortar according to the above preparation process, and add appropriate amount of water. Form and maintain a prism specimen of 40mm×40mm×160mm according to the regulations of DL / T5126-2001 of "Test Regulations for Polymer Modified Cement Mortar", and measure the 7-day compressive strength and 28-day flexural strength of the mortar according to the test procedures specified in the specification , compressive strength; according to the "polymer modified cement mortar test procedures" DL / T5126-2001 regulations forming and curing bonded tensile test specimen, the upper part of the test specimen is the tested mortar, its size is 40mm × 40mm × 10mm, The lower part is ordinary mortar, the size of the base block is 70mm×70mm×20mm, the mix ratio of t...

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Abstract

The invention discloses concrete repairing dry-mixed mortar being prepared from the components including, by mass, 100 parts of Portland cement, 80-120 parts of ferrous aluminate cement, 220-280 parts of fine aggregate, 30-40 parts of fly ash, 60-90 parts of silicon micro-powder, 0.5-1 part of methyl cellulose ether, 0.5-1 part of starch ether, 8-12 parts of anti-cracking fibers, 0.6-1.5 parts of a water reducing agent, and 0.5-2 parts of an expanding agent. The invention also relates to a preparation method of the mortar. The mortar has strong adhesive property, can be effectively bond with concrete, is anti-corrosion and has good anti-cracking performance, and prolongs service life of concrete.

Description

[0001] This application claims the priority of the Chinese patent application submitted to the China Patent Office on January 26, 2016, the application number is 201610055878.4, and the invention title is "dry-mixed mortar for concrete repair and its preparation method", the entire content of which is incorporated herein by reference Applying. technical field [0002] The invention relates to a concrete repair dry-mixed mortar used for repairing corroded concrete. The invention also relates to a method for preparing said mortar. Background technique [0003] Concrete is widely used in the field of construction as the main building material. Concrete buildings and components often experience surface corrosion due to various external forces during use. If this situation cannot be dealt with in time, the scope of corrosion will continue to expand. At present, the commonly used repair mortars are mainly inorganic cement mortar, organic resin mortar and polymer mortar; among t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/72
CPCC04B28/06C04B2111/72C04B7/02C04B14/068C04B18/08C04B18/146C04B24/383C04B24/38C04B16/0633C04B2103/302C04B22/148C04B16/02C04B16/0616C04B14/06
Inventor 欧阳旭东钟万里何建宗陈剑光王伟林介东李文胜杨伟军
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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