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Retarder for magnesium phosphate cement and use method thereof

A technology of magnesium phosphate cement and retarder, which is applied in the field of retarder for magnesium phosphate cement, which can solve problems such as corrosion of steel bars and influence on the performance of concrete structures, achieve stable effects, increase the difficulty of construction management, and delay the hydration process.

Active Publication Date: 2021-09-28
XIYUEFA INT ENVIRONMENTAL PROTECTION NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method will introduce chloride ions into the system, and the steel bars of the reinforced concrete structure will be corroded due to electrochemical reaction, thus affecting the performance of the concrete structure

Method used

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  • Retarder for magnesium phosphate cement and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh and prepare by weight: 25 parts of borax, 21 parts of magnesium sulfate heptahydrate, 4 parts of sodium acetate trihydrate, mix the above-mentioned materials and pour them into a blender to fully mix them evenly to obtain the retarder for magnesium phosphate cement of the present invention, marked It is No. 1; Weigh the retarder and magnesium phosphate cement according to the mass ratio of 3.5%, mix well and add water for use.

Embodiment 2

[0039] Weigh and prepare by weight: 25 parts of borax, 23.75 parts of magnesium sulfate heptahydrate, 1.25 parts of sodium acetate trihydrate, mix the above-mentioned materials and pour them into a blender to fully mix them evenly to obtain the retarder for magnesium phosphate cement of the present invention, marked No. 2; Weigh the retarder and magnesium phosphate cement according to the mass ratio of 3.5%, mix well and add water for use.

Embodiment 3

[0041]Weigh and prepare by weight: 25 parts of borax, 23.75 parts of magnesium sulfate heptahydrate, 1.25 parts of sodium acetate trihydrate, the above-mentioned materials are mixed and poured into a blender and fully mixed to obtain No. 1 retarder for magnesium phosphate cement of the present invention; Weigh the retarder and magnesium phosphate cement according to the mass ratio of 4.5%, mix well and add water for use.

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Abstract

The invention discloses a retarder for magnesium phosphate cement and a use method of the retarder. The retarder for the magnesium phosphate cement is prepared from the following materials in parts by weight: 23 to 48 parts of borax, 27 to 38 parts of magnesium sulfate heptahydrate and 1 to 6 parts of sodium acetate trihydrate. According to the invention, multiple retarding technologies are combined for use, a retarding effect is obvious, and the retarding effect is easy to adjust and controllable; the retarder is simple and practical, additional facility or measure cost is not increased, and construction management difficulty is not increased; safety and reliability are achieved, ions (such as chloride ions) harmful to a concrete matrix are not introduced, and structural strength and durability are not affected; and the retarder is high in applicability, can be introduced into magnesium phosphate cement paste, magnesium phosphate mortar and magnesium phosphate concrete for use, and is stable in effect.

Description

technical field [0001] The invention relates to a retarder for magnesium phosphate cement and a using method thereof, belonging to the technical field of magnesium phosphate cement admixtures. Background technique [0002] Due to various reasons such as raw materials, mix design, structural design, environmental erosion, construction defects, and poor maintenance, concrete structures often deteriorate during service, and fail to reach the expected life. Any concrete structure needs continuous protection, maintenance, repair or repair from the beginning of construction period to the end of its service period. With the comprehensive development of our country's infrastructure, the repair, restoration and protection of reinforced concrete structures will become increasingly prominent in the future. [0003] Choosing the correct repair material is the key. With the advent of the era of heavy traffic and fast pace, the ideal repair material should meet the following requirements...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/04C04B22/14C04B22/08C04B28/34C04B103/22
CPCC04B40/0039C04B22/142C04B24/04C04B22/0013C04B28/34C04B2103/22C04B14/304
Inventor 王飞刘跃刘晓斌徐建军徐泉心赵永飞
Owner XIYUEFA INT ENVIRONMENTAL PROTECTION NEW MATERIALS CO LTD
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