减水剂影响下湿磨黏土水泥灌浆材料性能研究
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TU528.042.2

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湖南省自然科学基金(2019JJ50023);2020 年益阳市银城科技人才托举工程项目


Experimental study on properties of wet-grinding clay cement grouting material under the influence of water reducer
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    摘要:

    为研究湿磨黏土水泥浆液在外加剂作用下的性能和结石体的性能,选用苯系和聚羧酸盐 2 种高效减水剂 为添加剂,取不同掺量的减水剂和水固比等因素进行试验,以获得浆液的密度、析水率、流动度、漏斗黏度、初 凝时间和 7,14,28 d 的结石体抗压强度与影响因素之间的变化规律。研究结果表明:浆液析水率、流动度和初凝时 间均随减水剂掺量的增加而增大;浆液漏斗黏度和结石体抗压强度则随其增加而减小;浆液密度主要受水固比影 响较大,随水固比增大而减小;减水剂的掺入能提高浆液的可泵性,且减水剂最适掺量不超过 1%。该研究成果 可为类似水泥灌浆材料的设计与施工提供借鉴。

    Abstract:

    To study the basic properties and stone performance of wet-grinding clay cement slurry under the action of admixture, a series of experimental studies considering the effects of super plasticizer content and water-solid ratio are carried out by using two high-efficiency water-reducing agents (benzene and polycarboxylate). The variation rules between the specific gravity of slurry, water evolution rate, fluidity, funnel viscosity, initial setting time, the compressive strength of stone body at 7day, 14day and 28day and the water reducer dosage are obtained. The results show that the water precipitation rate, fluidity and initial setting time of slurry increase with the increase of water reducer dosage, while the funnel viscosity and compressive strength of stone decrease with the increase of water-solid ratio. The slurry specific gravity is mainly affected by water-solid ratio, and decreases with the increase of water-solid ratio. The mixing of the water reducing agent can improve the pump ability of slurry, and the optimum dosage of water reducing agent should not exceed 1%. The research results can be used for reference in the design and construction of similar cement grouting materials.

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  • 在线发布日期: 2022-06-09
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