Lithium-based nano concrete hardener and construction method thereof

A technology of concrete and hardener, applied in the field of construction, can solve the problems of poor control of ASR adverse reactions of concrete, limited durability and weathering resistance, and change of concrete color, etc., to achieve excellent durability, low product cost, and penetration strong effect

Inactive Publication Date: 2016-11-23
XIAMEN NORNS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hardening agent mainly contains silicic acid compounds containing a large amount of sodium salts. The ASR adverse reaction of concrete cannot be effectively controlled, and the durability and weathering resistance of the concrete matrix are limited. Pan-alkali turns white and changes the color of concrete

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: the preparation of lithium-based nano-concrete hardener

[0029] Raw materials (percentage by weight): 30% of lithium silicate; 35% of silica sol; 2% of accelerator potassium metaaluminate, 0.5% of penetrant FC-4430, and the balance is water.

[0030] Preparation method: Dissolve the accelerator in the required water, then add lithium silicate and silica sol to it sequentially under stirring, and react at room temperature for 30 minutes to obtain a homogeneous concrete hardener.

[0031] After the concrete base surface is cleaned and roughly ground, the hardener is sprayed, and the base surface can be cleaned and polished after curing is complete. After testing, compared with the concrete not coated with hardener, the Mohs hardness increased by 3 grades, and the penetration depth increased by 6.8mm.

Embodiment 2

[0032] Embodiment 2: the preparation of lithium-based nano-concrete hardener

[0033] Raw materials (percentage by weight): 25% lithium silicate; 40% silica sol; 1% accelerator potassium metaaluminate, 1% accelerator aluminum potassium sulfate, 0.5% penetrant SI-800, and the balance is water.

[0034] Dissolve the accelerator in the required water, then add lithium silicate and silica sol to it sequentially under stirring, and react for 1 hour at room temperature to obtain a homogeneous concrete hardener.

[0035] After the concrete base surface is cleaned and roughly ground, the hardener is sprayed, and the base surface can be cleaned and polished after curing is complete. After testing, compared with the concrete not coated with hardener, the Mohs hardness increased by 4 grades, and the penetration depth increased by 6.5mm.

Embodiment 3

[0036] Embodiment 3: the preparation of lithium-based nano-concrete hardener

[0037] Raw materials (percentage by weight): 35% of lithium silicate; 25% of silica sol; 1.5% of accelerator aluminum potassium sulfate, 1.0% of accelerator sodium metaaluminate, 0.2% of penetrant FC-4430, and 0.2% of penetrant Zonyl FSJ 0.2%, the penetrant Silok8033 content is 0.3%, and the balance is water.

[0038] Dissolve the accelerator in the required water, then add lithium silicate and silica sol to it sequentially under stirring, and react for 1 hour at room temperature to obtain a homogeneous concrete hardener.

[0039] After the concrete base surface is cleaned and roughly ground, the hardener is sprayed, and the base surface can be cleaned and polished after curing is complete. After testing, compared with the concrete not coated with hardener, the Mohs hardness increased by 3 grades, and the penetration depth increased by 7.0mm.

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Abstract

The invention discloses a lithium-based nano concrete hardener and a construction method thereof. The lithium-based nano concrete hardener is prepared from the following components in percentage by weight: 5 to 40 percent of lithium silicate, 10 to 50 percent of silica sol, 1 to 5 percent of promoting agents, 1 to 5 percent of penetrating agents and the balance of water. During use, a concrete base surface is cleaned and subjected to coarse grinding, and then is sprayed with the lithium-based nano concrete hardener; after concrete is completely hardened, the base surface can be cleaned and polished. The lithium-based nano concrete hardener has the characteristics of being capable of relieving the ASR degradation effect and preventing cracking of a concrete structure, being high in durability, environment-friendly and being suitable for industrial production, and the characteristics that the preparation method is simple and convenient, and the product cost is low.

Description

technical field [0001] The invention relates to the construction field, in particular to a lithium-based nano-concrete hardener and a construction method thereof. Background technique [0002] At present, concrete structure has been widely used in the field of construction, but the inherent defects of concrete structure have become the main factors affecting the length of concrete life cycle. Alkali-aggregate reaction (ASR for short) refers to the reaction of cement, admixtures and alkali in water in concrete raw materials with the active components in the aggregate, and gradually reacts after the concrete is poured, and the product absorbs water and expands to cause internal stress in the concrete, resulting in Concrete expands and cracks, losing design performance. The adverse reaction of ASR is currently recognized all over the world as "the fatal injury of concrete structure cancer". In addition, the concrete structure also has the defects of easy dusting, poor wear re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B40/02C04B41/68
CPCC04B40/0295C04B41/5035C04B41/68C04B41/5007C04B41/5024C04B41/46C04B41/4535C04B41/5014C04B41/4922
Inventor 郭亚莹蔡福
Owner XIAMEN NORNS TECH
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