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Alkali aggregate reaction inhibitor

A technology of reaction inhibitor and alkali aggregate, applied in the field of concrete auxiliary materials, can solve the problem of insignificant inhibition effect, and achieve the effects of inhibiting alkali aggregate reaction, improving workability, and reducing unit water consumption.

Active Publication Date: 2019-04-12
内蒙古自治区水利水电勘测设计院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on alkali-aggregate reaction, from microscopic mechanism research to macroscopic experimental research, from mixing fly ash and silica fume to mixing various chemical admixtures and active admixtures such as diatomite and zeolite, has expanded people's The understanding of alkali-aggregate reaction provides certain measures for the prevention of alkali-aggregate reaction in engineering, but the inhibitory effect is not obvious

Method used

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  • Alkali aggregate reaction inhibitor

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Follow the steps below to prepare the alkali aggregate inhibitor and prepare the cement mortar:

[0033] (1) Preparation of rice husk ash: In the combustion control box, the heating rate is 50°C / min, the maximum temperature is 460°C, and the combustion of rice husk is controlled for 20 minutes. After burning the rice husk, add 0.06% ethylene glycol , the particle size of the rice husk ash is ground into 30 microns for subsequent use;

[0034] (2) the soybean meal is pulverized to make soybean meal powder with a particle size of 30 microns for subsequent use;

[0035] (3) Dissolving 0.2% quaternary ammonium salt, 0.2% polyoxyethylene ether, 0.2% polyvinyl alcohol and 0.5% lactic acid in water to make an aqueous solution, and prepare cement mortar with the aqueous solution;

[0036] (4) Add 6% rice husk ash, 0.8% soybean meal powder, and 4% lithium carbonate to the cement mortar in sequence.

Embodiment 2

[0038] Follow the steps below to prepare the alkali aggregate inhibitor and prepare the cement mortar:

[0039] (1) Preparation of rice husk ash: In the combustion control box, the heating rate is 40°C / min, the maximum temperature is 500°C, and the combustion of rice husk is controlled for 10 minutes. After burning the rice husk, add 0.1% ethylene glycol , the rice husk ash particle size is ground into 10 microns, for subsequent use;

[0040] (2) the soybean meal is pulverized to make soybean meal powder with a particle size of 10 microns for subsequent use;

[0041] (3) Dissolving 1% quaternary ammonium salt, 0.25% polyoxyethylene ether, 0.75% polyvinyl alcohol and 0.1% lactic acid in water to make an aqueous solution, and prepare cement mortar with the aqueous solution;

[0042] (4) Add 3% rice husk ash, 5% soybean meal powder, and 1% lithium carbonate to the cement mortar in sequence.

Embodiment 3

[0044] Follow the steps below to prepare the alkali aggregate inhibitor and prepare the cement mortar:

[0045] (1) Preparation of rice husk ash: In the combustion control box, the heating rate is 60°C / min, the maximum temperature is 400°C, and the combustion of rice husk is controlled for 30 minutes. After burning the rice husk, add 0.01% ethylene glycol , the rice husk ash particle size is ground into 50 microns, for subsequent use;

[0046] (2) the soybean meal is pulverized to make soybean meal powder with a particle size of 50 microns for subsequent use;

[0047] (3) Dissolving 0.01% quaternary ammonium salt, 0.01% polyvinyl alcohol and 2% lactic acid in water to make an aqueous solution, and prepare cement mortar with the aqueous solution;

[0048] (4) Add 8% rice husk ash, 0.3% soybean meal powder, and 1% lithium carbonate to the cement mortar in sequence.

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Abstract

The invention belongs to the field of concrete auxiliary materials, and particularly relates to an alkali aggregate reaction inhibitor. The inhibitor comprises quaternary ammonium salt, a nonionic surfactant, rice hull ash, soybean meal, lactic acid and lithium carbonate. The invention further discloses a preparation method of the inhibitor. The inhibitor is simple in preparation method and can effectively inhibit the alkali aggregate reaction after being mixed with cement mortar, and the method is an economical and efficient alkali aggregate reaction inhibition technology.

Description

technical field [0001] The invention belongs to the field of concrete auxiliary materials, and in particular relates to an alkali-aggregate reaction inhibitor. Background technique [0002] In recent decades, concrete, as one of the most widely used building materials in various engineering structures, has gradually become an indispensable part of human social life. Moreover, with the increasing maturity and development of concrete technology, it is not only used in civil engineering structures such as houses, highways, and bridges, but also in hydraulic engineering, ocean engineering, and some special engineering structures. Initially, the design of concrete structures focused on meeting the requirements of strength, and strength was used as the standard for the life of concrete structures. However, as the application range of concrete becomes wider and wider, environmental factors become more and more complex. In order to better play the role of concrete structures in var...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B103/60
CPCC04B40/0039C04B2103/603C04B18/101C04B24/026C04B18/248C04B24/121C04B24/32C04B24/2623C04B24/06C04B22/10
Inventor 庞文台王子龙樊忠成易廷军白金徐可满达纪宪坤侯维红白喜亮巩维屏石韬梁栋苏海涛寇生岳宋利春齐志远王斌赵宏涛邓有伟贺元甲
Owner 内蒙古自治区水利水电勘测设计院
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