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High-permeability waterproof additive for concrete

An additive and concrete technology, applied in the field of concrete building waterproof materials, can solve the problems of poor synergistic performance of penetration and waterproof effects, and achieve the effects of excellent rehydration, improved water resistance and durability, and improved permeability and waterproofing.

Inactive Publication Date: 2019-07-16
雷洪伍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a concrete hyperosmotic waterproofing additive in view of the poor synergy between penetration and waterproofing effect of commonly used concrete penetrating waterproofing agents

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0032] The preparation method of composite penetrating waterproof base material comprises the following steps:

[0033](1) Take gelatin and water according to the mass ratio of 1:25~35, mix and stir, let stand at room temperature and swell for 3~5 hours to obtain gelatin solution, at 35~45°C, take gelatin solution according to the mass ratio of 25:0.1:0.2~0.5 and add Mix oil and lecithin, stir magnetically at 400~700r / min for 1~3h, add 14~25% gelatin solution, mix with sodium sulfate solution with a mass fraction of 20%, cool to 12~18°C, add a mass fraction of 37 % formaldehyde solution, adjust the pH to 9.2~10.1 with 25% NaOH solution, let it stand for solidification for 30~45min, filter it with suction, wash the filter residue with water for 2~4 times, and dry it in a freeze dryer at -40℃ 3~6h, get microcapsules;

[0034] (2) According to the mass ratio of 1:2~4:0.1:0.1, take microcapsules, plantain starch, stabilizer, and thenardite in a mortar, and grind at 350~550r / min f...

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Abstract

The invention discloses a high-permeability waterproof additive for concrete and belongs to the technical field of waterproof materials of concrete construction. According to the high-permeability waterproof additive, by introducing a small amount of trimethyl aluminum ingredient, the permeability and waterproofing property of the additive are further improved during use stirring and water entry.An added magnesium salt and an added zinc salt can produce hydroxides during pH regulating and permeate into the surface of the concrete by sufficient depth, and thus, the thickness of a waterproof layer is increased, so that the concrete is not prone to erosion by water or gas, and the durability of the concrete is improved. Hydroxyl containing azobenzene serves as an initiator, and boron trifluoride serves as a catalyst, so that the additive can be combined to a hydrophilic side in a concrete system, the hydrophobic effect is improved, and capillary bores are filled to form a compact capillary bore structure; and meanwhile, the additive has good water resistance, the compactness among ingredients is improved, and the wettability to the surface of the concrete caused by water is lowered.According to the high-permeability waterproof additive, the problem that permeable-waterproof agents of the concrete commonly used at present are poor in permeation and waterproof effect coordinationperformance is solved.

Description

technical field [0001] The invention belongs to the technical field of concrete building waterproof materials, and in particular relates to a concrete hyperosmotic waterproof additive. Background technique [0002] Concrete structure refers to the structure mainly made of concrete. It mainly includes plain concrete structure, reinforced concrete structure and prestressed concrete structure. Among them, the reinforced concrete structure has always been considered as the strongest and most durable concrete structure. Although steel bars and concrete are two materials with different physical and mechanical properties, there is a strong bond between them, which can make them work together effectively. In addition, concrete can also form a protective layer for steel bars, so that the steel bars are not corroded, thereby improving the performance of reinforced concrete. [0003] Water-based penetrating waterproofing agent is based on alkali metal silicate solution and inert mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/65
CPCC04B40/0046C04B2103/65C04B22/087C04B22/12C04B24/085C04B24/2623C04B24/003C04B24/20C04B24/32C04B24/129C04B24/026C04B24/124C04B22/0013C04B24/023C04B24/14C04B24/08C04B24/38C04B22/10C04B22/124C04B22/147C04B24/40C04B12/04
Inventor 雷洪伍
Owner 雷洪伍
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