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Lithium-based concrete sealing solidifying agent

A technology for sealing curing agent and concrete, applied in the field of chemical building materials, can solve the problems of low performance, easy generation of dust, rapid strength decline, etc., to improve compressive strength and wear resistance, reduce cumbersome processes, and reduce adverse reactions Effect

Inactive Publication Date: 2012-06-20
SHANGHAI SUNRISE CHEMISTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inherent process of cement hardening, concrete has unavoidable disadvantages: the microstructure contains a large number of interconnected pores
The main reason for this is that my country mainly uses low-strength concrete with a strength of C20-C30. These low-design-strength concretes are not strong in penetration resistance, and their performance and service life are more likely to be corroded by harmful substances. Easy to generate dust, rapid strength decline, easy to wear, unsightly, and sharp decrease in performance over time, etc.

Method used

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  • Lithium-based concrete sealing solidifying agent
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  • Lithium-based concrete sealing solidifying agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A lithium-based concrete sealing and curing agent, its formula is:

[0037] Table 2 Lithium-based concrete sealant curing agent A formula

[0038]

[0039] Dissolve lithium hydroxide monohydrate in water, put it into the reaction kettle and stir for 15 minutes, then add the silica sol in two steps, first add half of it in 15 minutes, then stir for 10 minutes, then add the remaining half in 20 minutes, Stirring continued for more than 3 hours to obtain a lithium silicate sol with a modulus of about 16. Add FSJ, 2-3168, BS1306, and propylene glycol sequentially under stirring. When one component is dispersed or dissolved evenly, the next component can be added. When all components are evenly dispersed, continue stirring for 60 to 90 minutes to obtain Lithium based concrete sealer in composition A. The reaction temperature is controlled at 40°C±3°C.

Embodiment 2

[0041] A lithium-based concrete sealing and curing agent, its formula is:

[0042] Table 3 Formula of Lithium-based Concrete Sealing and Curing Agent B

[0043]

[0044] First put water and lithium hydroxide monohydrate into the reaction kettle, start stirring and heat to 60°C to dissolve the lithium hydroxide completely, then add the silica sol dropwise within 1.5 hours, and continue to keep stirring for more than 3 hours after the dropwise addition, to obtain Lithium silicate sol with a modulus of about 2.8. Then add FSJ, 2-3168, OFS-777, and sodium metaaluminate sequentially under stirring. When one component is dispersed or dissolved evenly, the next component can be added. When all components are evenly dispersed, add 1000~ Keep stirring at a speed of 1500rpm for 60-90 minutes to obtain the lithium-based concrete sealing and curing agent in composition B. The reaction temperature was controlled at 60°C±3°C.

Embodiment 3

[0046] A lithium-based concrete sealing and curing agent, its formula is:

[0047] Table 4 Lithium-based concrete sealant curing agent C formula

[0048]

[0049] First put the silica sol into the reaction kettle, start stirring and keep the temperature of the reaction kettle at 20±5°C, drop the lithium hydroxide solution dissolved in water by lithium hydroxide monohydrate within 2 hours, and continue to keep warm after the addition is completed After stirring for more than 3 hours, a lithium silicate sol with a modulus of about 4.2 was obtained. Then add Tegopren 5878, 2-3168, BS1306 and triethanolamine in sequence under stirring. When one component is dispersed or dissolved evenly, the next component can be added. When all components are evenly dispersed, continue stirring for 60~90 minutes , to obtain the lithium-based concrete sealing and curing agent in composition C. The reaction temperature was controlled at 20±5°C.

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Abstract

The invention discloses a lithium-based concrete sealing solidifying agent. The lithium-based concrete sealing solidifying agent comprises the following components in percentage by weight: 50.0-90.0 percent of lithium silicate sol, 0.01-1.0 percent of wetting and dispersing agent, 0.01-1.0 percent of defoaming agent, 0.01-1.0 percent of permeability-resistant agent, 0.0-10.0 percent of stabilizing agent, 0.0-1.0 percent of accelerating agent and the balance of water. The lithium-based concrete sealing solidifying agent can produce C-S-H gel through the effective permeability and the hydration reaction with dissociative calcium ions in concrete to seal capillary pores in the concrete, so that the permeability resistance, the wear resistance, the hardness and other performance of the concrete can be improved.

Description

technical field [0001] The invention relates to the technical field of chemical building materials, in particular to a lithium-based concrete sealing and curing agent. Background technique [0002] Concrete consists of coarse granular aggregates and cement hydrates. During concrete construction, the components of cement and water undergo a very complex chemical reaction to form hard hydrates, which cement the aggregates filled in it together to form a structure with high compressive strength, which is economical, durable and fire-resistant. , high compression performance and other advantages. However, due to the inherent process of cement hardening, concrete has an unavoidable shortcoming: the microstructure contains a large number of interpenetrating capillary pores. In order to obtain better fluidity and construction performance, a much larger amount of water than the actual requirement of cement hydration is added in the batching. The excess water gradually evaporates a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26C04B41/50
Inventor 傅乐峰李漠冯中军郑柏存
Owner SHANGHAI SUNRISE CHEMISTRY CO LTD
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