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Concrete inner curing agent and preparing method thereof

A concrete internal curing agent technology, which is applied in the field of concrete internal curing agent and its preparation, can solve the problems of large slump changes over time, poor cement compatibility, and insufficient economy, so as to reduce post-maintenance costs and high water-reducing rate , Good for environmental protection

Active Publication Date: 2008-03-19
GUOJIA NEW MATERIAL HUBEI ENVIRONMENTAL PROT GEL IND PARK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method often has problems such as poor compatibility with cement, low water-reducing rate, large change in slump over time, excessive air-entraining phenomenon, and uneconomical problems.

Method used

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  • Concrete inner curing agent and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] formula:

[0048] Deionized water 55%, bentonite 3%, sodium hydroxide 3%, acrylic acid 15%, acrylamide 15%, ammonium persulfate 0.001%, N'N-methylenebisacrylamide 0.0005%, additive 8.9985% (of which Kaolin 50%, ethylene oxide 10%, urea 10%, talc 30%)

[0049] Preparation:

[0050] First, mix deionized water, sodium hydroxide, acrylic acid, acrylamide, etc., and control the temperature of the mixture at 30 degrees; then add N'N-methylenebisacrylamide, ammonium persulfate, bentonite, and ethylene oxide in sequence , urea, stir evenly, use aqueous solution in-situ polymerization composite method, 50 ℃ -110 ℃ hot air circulation heating for 3 hours, continue to dry and pulverize, mix evenly with kaolin and talcum powder, and then get powder concrete internal curing agent.

Embodiment 2

[0052] formula:

[0053] Deionized water 2%, montmorillonite 65%, sodium hydroxide 2.5%, acrylic acid 15%, acrylamide 15%, potassium persulfate 0.001%, N'N-methylenebisacrylamide 0.00001%, additive 0.49899% (including 50% ethylene oxide, 50% urea)

[0054] Preparation:

[0055] First, mix deionized water, sodium hydroxide, acrylic acid, acrylamide, etc., and control the temperature of the mixture at 30 degrees; then add N'N-methylenebisacrylamide, potassium persulfate, montmorillonite, epoxy Mix ethane and urea evenly, and heat with hot air circulation at 50°C-110°C for 2 hours to obtain a solution-type concrete internal curing agent.

Embodiment 3

[0057] formula:

[0058] Deionized water 2%, montmorillonite 10%, bentonite 25%, sodium hydroxide 2%, acrylic acid 55%, potassium persulfate 0.0008%, N'N-methylenebisacrylamide 0.0003%, additive 5.9989% ( Among them, kaolin 28%, ethylene oxide 12%, urea 30%, talcum powder 30%)

[0059] Preparation:

[0060]First, mix deionized water, sodium hydroxide, acrylic acid, etc., and control the temperature of the mixture at 30 degrees; then add N'N-methylenebisacrylamide, potassium persulfate, montmorillonite, bentonite, and ethylene oxide in sequence Alkanes, urea, stir evenly, use aqueous solution in-situ polymerization composite method, 50 ℃ -110 ℃ hot air circulation heating for 4 hours, continue to dry and pulverize, stir and mix with kaolin and talcum powder evenly, that is, the powder type concrete internal curing agent.

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Abstract

The invention relates to an internal concrete curing compound and manufacturing method thereof. The ingredients include de-ionized water, non-metallic minerals, sodium hydroxide, acrylic acid and / or derivative monomer, water-soluble initiators of free radical polymerization, water-soluble cross-linker of free radical polymerization and addictive. The preparing method for the internal curing compound of solution-type concrete is characterized in that the following procedures are applied: 1) preparation of raw materials; 2) mixing of de-ionized water, sodium hydroxide, acrylic acid and / or derivative monomer; 3) the mixed solution is added and mixed with and in order of cross-linker, initiator, non-metallic minerals, epoxy ethane, rust retardant agent; the internal concrete curing compound can be obtained following a homogeneous mixing and heating with recycled hot air. The invention can save curing water, reduce manpower / material input, minimize addictive cost, effectively control water evaporation, reduce the cost for late concrete curing and enhance the comprehensive performance of concrete addictives, which proves to be environment friendly with respect to environmental impact.

Description

technical field [0001] The invention relates to a concrete internal curing agent and a preparation method thereof. Background technique [0002] In concrete construction, concrete curing is a very important link. The strength of concrete comes from the hydration of cement, and the hydration of cement can only occur in the capillary filled with water. Therefore, conditions must be created to prevent water from evaporating and losing in the capillary, so that the cement can be fully hydrated to ensure the strength of concrete. Growing. Otherwise, in a dry environment, the hydration of cement will stop with the gradual evaporation of water, and cause concrete shrinkage cracks and loose structure, which will seriously affect the strength and durability of concrete. Therefore, it is extremely important to create a moist and water-retaining environment for the maintenance of concrete. [0003] The traditional concrete curing method is to cover wet sacks, wet straw bags or wet s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B22/06C04B22/00
CPCC04B2103/14C04B40/0039
Inventor 王海波胡茂华张继华
Owner GUOJIA NEW MATERIAL HUBEI ENVIRONMENTAL PROT GEL IND PARK CO LTD
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