Concrete curing agent

A technology of concrete curing agent and initiator, applied in the field of concrete curing agent, can solve problems such as peeling, temperature influence, cracking, etc., and achieve the effects of good durability, increased strength and convenient use

Active Publication Date: 2019-07-09
CHINA ROAD & BRIDGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the oxidants currently on the market are affected by temperature, and are prone to peeling, peeling, and cracking.

Method used

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  • Concrete curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1, prepare polymer emulsion, add 20 times water of emulsifier weight to emulsifier by weight parts of inner core monomer, external crystal nucleus, initiator, emulsifier, add inner core monomer and stir at high speed for 30min, stirring speed 1600r / min, then add the first initiator, continue stirring at high speed for 120min, stirring speed 1600r / min; then add the external crystal nucleus and continue stirring for 20min, stirring speed is 600r / min, then add the second initiator and continue stirring 360min to get the polymer emulsion, the stirring speed is not higher than 300r / min; wherein the weight ratio of the first initiator and the second initiator is 20:1;

[0028] Wherein the macromolecular emulsion comprises an inner core monomer, an external crystal nucleus, an initiator and an emulsifier, and the internal core monomer comprises 1 part of styrene, 1 part of vinyl acetate and 5 parts of methyl acrylate in parts by weight; the external crystal nucleus The co...

Embodiment 2

[0067] Step 1. Prepare a polymer emulsion. Weigh the inner core monomer, external crystal nucleus, initiator, and emulsifier in proportion, add water 100 times the weight of the emulsifier to the emulsifier, and stir at high speed for 20 minutes after adding the inner core monomer. 600r / min, then add the first initiator, continue to stir at a high speed for 60min, the stirring speed is 500r / min; then add the external crystal nucleus and continue stirring for 10min, the stirring speed is 300r / min, then add the second initiator to continue Stir for 120min to obtain a polymer emulsion, and the stirring speed is not higher than 300r / min; wherein the weight ratio of the first initiator and the second initiator is 10:1; the inner core monomer and the outer crystal nucleus are at different stirring speeds, Form a layered film structure to increase the continuity and durability of the curing agent.

[0068] Wherein the polymer emulsion comprises inner core monomer, external crystal nu...

Embodiment 3

[0073]Step 1. Prepare polymer emulsion, weigh the inner core monomer, external crystal nucleus, initiator and emulsifier in proportion, add water 12 times the weight of the emulsifier to the emulsifier, add the inner core monomer and stir at high speed for 23 minutes, the stirring speed 800r / min, then add the first initiator, continue to stir at a high speed for 100min, the stirring speed is 800r / min; then add the external crystal nucleus and continue stirring for 15min, the stirring speed is 400r / min, then add the second initiator to continue Stir for 260min to obtain a polymer emulsion, and the stirring speed is not higher than 300r / min; wherein the weight ratio of the first initiator and the second initiator is 15:1; the inner core monomer and the outer crystal nucleus are at different stirring speeds, Form a layered film structure to increase the continuity and durability of the curing agent.

[0074] Wherein the polymer emulsion comprises inner core monomer, external crys...

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Abstract

The invention discloses a concrete curing agent. The concrete curing agent comprises the following components in parts by weight: 40-55 parts of a high-molecular emulsion, 3-12 parts of a film-formingagent and 2-6 parts of a penetrating agent; the high-molecular emulsion comprises a core monomer, an external crystal nucleus, an initiator and an emulsifier; the core monomer comprises the followingcomponents in parts by weight: 1-2 parts of styrene, 1-2 parts of vinyl acetate and 5-8 parts of ester components; and the external crystal nucleus comprises the following components in parts by weight: 2-4 parts of fly ash, 3-5 parts of kaolinite powder, 2-3 parts of barite and 1-2 parts of chitosan, wherein the weight ratio of the inner core monomer to the external crystal nucleus is (10-20):1.The concrete curing agent provided by the invention is good in stability, good in continuity, good in durability and high in water retention rate. In a process from initial set to final set of concrete, influence by temperature and humidity is prevented, and the phenomena of peeling, falling, cracking and the like are avoided.

Description

technical field [0001] The invention relates to the technical field of building materials. More specifically, the present invention relates to a concrete curing agent. Background technique [0002] Concrete is one of the most widely used building materials in construction projects. Its performance depends not only on the composition and proportion of concrete raw materials, but also on the curing after pouring. If the concrete is not cured after pouring or the curing is not in place, the moisture inside the concrete will evaporate to the outside through the fine pores of the system, resulting in a decrease in the performance indexes of the concrete. Traditional concrete curing methods mainly include water curing, steam curing, landfill curing, spreading grass bags and plastic films. Low, poor maintenance effect, can not meet the needs of the modern construction industry. [0003] Curing agent curing emerges as the times require. After the concrete is constructed, a layer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B40/04
CPCC04B40/04
Inventor 李曼容尚鑫庞彪黎锐峥
Owner CHINA ROAD & BRIDGE
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