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Preparation method of slate alkali reactivity restraining addition agent

A technology of admixture and alkali activity, applied in the field of engineering materials, can solve the problems of high engineering cost, difficult selection of aggregate materials, and large impact on construction period, and achieve the effect of improving engineering progress, easy control of raw materials, and saving engineering costs.

Active Publication Date: 2012-07-11
CHINA RAILWAY NO 5 ENG GRP
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a preparation method and material standard of a slate alkali activity inhibitory admixture to solve the problems of difficulty in selecting aggregate materials in existing slate areas, resulting in high project cost and large impact on construction period

Method used

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Examples

Experimental program
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Embodiment Construction

[0020] Embodiments of the invention:

[0021] 1. Concrete with aggregate alkali active expansion rate between 0.1% and 0.2%

[0022] When preparing concrete, add 30% of the amount of cementitious material (mass ratio) into the same amount of Class I fly ash instead of cement, just suppress it.

[0023] 2. Concrete with an alkali activity expansion rate of aggregate between 0.2% and 0.3% and low environmental humidity

[0024] According to the mass ratio, first accurately weigh 100 parts of the mixed material, 16.00 parts of silicon powder, and nano-SiO 2 1.67 parts, 0.10 parts of triethanolamine, 1.67 parts of high-efficiency plasticizer, 0.01 part of air-entraining agent, except triethanolamine, the remaining components are fully mixed first, and then mixed with triethanolamine spray to prepare an inhibitory admixture (FLSR -I) The finished product is ready for use.

[0025] When preparing concrete, add 30% cementitious material (mass ratio) of inhibitor admixture (FLSR-I)...

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Abstract

The invention discloses a preparation method and a material using standards of a slate alkali reactivity restraining addition agent (FLSR-I). The addition agent is composed of mixing materials, ganister sands, nanometer SiO2, triethanolamine, a high-efficient plasticizing agent and an air entraining agent, the preparation method comprises accurately weighting dosage of the mixing materials, the ganister sands, the nanometer SiO2, the triethanolamine, the high-efficient plasticizing agent and the air entraining agent in proportion during preparation; sufficiently blending the mixing materials,the ganister sands, the nanometer SiO2, the high-efficient plasticizing agent and the air entraining agent, and manufacturing end products of the restraining addition agent by blending with the triethanolamine; and mixing in preparation of alkali reactive aggregate concrete in carious grades in proportion. The preparation method can effectively restrain reaction of slate alkali aggregate with expansion ratio between 0.2% to 0.5% and is obvious in restraining effect, simple and convenient in using method and free of needs of special construction control, thereby being capable of greatly lowering engineering using materials and transportation cost, and expanding material selecting range of the engineering using materials simultaneously.

Description

technical field [0001] The invention relates to a preparation method and a material standard of a slate alkali activity inhibiting admixture, belonging to the technical field of engineering materials. Background technique [0002] my country has a vast territory, and slate is widely distributed in areas such as Hebei, Jiangxi, Shaanxi, Guangdong, Hubei, Guizhou and other places. In particular, the slate area in Guizhou accounts for 1 / 6 of Guizhou Province. The mechanical properties of slate meet the requirements for preparing concrete as an aggregate, but it has alkali activity to varying degrees. The expansion rate is between 0.1% and 0.3% when tested by the quick mortar rod method, and partially exceeds 0.3%. Due to the activity characteristics of slate aggregates, civil engineering in Guizhou has adopted complex control measures so far, and only some less active slates can be used, which is not effective for higher alkali-active slates with an expansion rate of 0.2% to 0....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16
Inventor 黄武何晓春李固华李远富梁毅朱安磊杨锐江仿安太顺
Owner CHINA RAILWAY NO 5 ENG GRP
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