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Auxiliary cementing material with high chloride ion corrosion resistance and preparation method thereof

A technology for assisting cementitious materials and chloride ions, applied in the field of building materials, can solve problems such as emphasis on a single factor, few studies on nanomaterials and mineral admixtures, etc., to improve the curing rate, the preparation method is simple and easy to operate, The effect of reducing internal raw defects

Active Publication Date: 2021-04-09
GUANGZHOU TESTING CENTRE OF CONSTRUCTION QUALITY AND SAFETY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]A lot of research work has been done on concrete chloride ion curing at home and abroad, but the research is often focused on a single factor
In addition, the research work on the chloride ion curing of concrete is mainly concentrated in mineral admixtures, and there is little research on the compounding of nanomaterials and mineral admixtures

Method used

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  • Auxiliary cementing material with high chloride ion corrosion resistance and preparation method thereof
  • Auxiliary cementing material with high chloride ion corrosion resistance and preparation method thereof
  • Auxiliary cementing material with high chloride ion corrosion resistance and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] An auxiliary gelling material with high resistance to chloride ion erosion, made of the following raw materials in parts by weight:

[0026] 43 parts of benchmark cement, 2 parts of gypsum, 7.5 parts of potassium dihydrogen phosphate, 7.5 parts of magnesia, 0.71 parts of borax, 15 parts of metakaolin, 5 parts of graphene, 3 parts of activator, and 1 part of dispersant.

[0027] The preparation method of the auxiliary gelling material with high resistance to chloride ion erosion is as follows:

[0028] 1) Nano-filler pretreatment: dissolving the dispersant in 17.8 parts by weight of water, then adding graphene, mixing and stirring, and then performing ultrasonic treatment for 30 minutes to obtain a surface-treated nano-filler suspension;

[0029] 2) Preparation of cementitious material: Weigh the reference cement, potassium dihydrogen phosphate, magnesia, borax, gypsum, metakaolin, activator and surface-treated nano-filler according to the above proportions, and mix them...

Embodiment 2

[0031] A high resistance to chloride ion erosion auxiliary gelling material, the difference from Example 1 is that the raw material composition and parts by weight are:

[0032] 43 parts of benchmark cement, 2 parts of gypsum, 9.5 parts of potassium dihydrogen phosphate, 9.5 parts of magnesia, 0.95 parts of borax, 15 parts of metakaolin, 5 parts of graphene, 3 parts of activator, and 1 part of dispersant.

[0033] Its preparation method is identical with embodiment 1.

Embodiment 3

[0035] A high resistance to chloride ion erosion auxiliary gelling material, the difference from Example 1 is that the raw material composition and parts by weight are:

[0036] 48 parts of benchmark cement, 2 parts of gypsum, 9.5 parts of potassium dihydrogen phosphate, 9.5 parts of magnesia, 0.95 parts of borax, 20 parts of metakaolin, 5 parts of graphene, 3 parts of activator, and 1 part of dispersant.

[0037] Its preparation method is identical with embodiment 1.

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Abstract

The invention provides an auxiliary cementing material with high chloride ion corrosion resistance, and relates to the technical field of building materials. The chloride ion erosion resistant auxiliary cementing material is prepared from the following raw materials in parts by weight: 40-60 parts of reference cement, 5-10 parts of monopotassium phosphate, 5-10 parts of magnesia, 0.5-1 part of borax, 2 parts of gypsum, 10-20 parts of metakaolin, 2-6 parts of excitant, 0.2-2 part of dispersing agent and 1-10 parts of nano filler. The auxiliary cementing material disclosed by the invention not only can reduce the content of free chloride ions in concrete, but also can enhance the chloride ion migration resistance and reduce the corrosion damage of reinforcing steel bars.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an auxiliary gelling material with high resistance to chloride ion erosion and a preparation method thereof. Background technique [0002] In the field of construction, chloride attack is one of the most important factors leading to the insufficient durability of concrete structures. Studies have shown that the chloride ions that cause steel bar corrosion are mainly free chloride ions inside the concrete. When the concentration of this part of chloride ions exceeds a certain value, it can produce ion depolarization and conduction with the steel bar, destroying the passivation film on the surface of the steel bar and causing steel bar corrosion. . Corrosion of steel bars to a certain extent will lead to rust swelling of concrete, accelerate the deterioration of reinforced concrete structures, and eventually lead to the failure of the bearing capacity of concrete compon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B28/00C04B7/00C04B111/26C04B111/20
CPCC04B28/14C04B28/006C04B7/00C04B2111/26C04B2111/20C04B22/16C04B14/304C04B22/08C04B14/026C04B2103/408C04B12/04C04B22/062Y02P40/10
Inventor 赵汝英祝雯谭梓枫陈晋栋
Owner GUANGZHOU TESTING CENTRE OF CONSTRUCTION QUALITY AND SAFETY CO LTD
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