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一种新型混凝土灌浆料的研究

2016-08-16郑成艳刘圣伟齐继郭春

中国建筑科学 2016年7期

郑成艳 刘圣伟 齐继 郭春

摘 要:本论文通过大量的实验,以普通硅酸盐水泥为基础,通过骨料级配和多种外加剂的调试,研制开发出一种具有良好流动性的高强灌浆料。该灌浆材料初始流动度大于335mm,1h流动度可达260 mm,硬化浆体强度高,2h强度可达22 MPa,24h抗压强度可达40MPa,其性能满足标准,达国内先进水平。该灌浆料具有较高的流动性,在不振捣或少振捣的情况下可以自流平而充满模板,并能够保持不离析、不泌水、成型质量均匀,不会产生普通混凝土由于振捣不充分而产生的蜂窝麻面和内部空洞等质量缺陷,是非常有前景发展的一种材料。

关键词:灌浆料;流动度;高性能

Study of a new concrete grout

ZHENG Chengyan 1 LIU shengwei 2 QIji 3 GUO chun 4

(1.Jilin communications polytechnic,Changchun,130000;2. Changchun Water Resources and Hydropower Engineering Co.,Ltd. Huayu, Changchun,130021;3. Jilin Province Science and Technology Association, Changchun,130000; 4. China Water Northeastern?Investigation Design&Research; , Co.,Ltd, Changchun,130000;)

Abstract:In this paper, through a large number of experiments to ordinary portland cement for the foundation. Through a variety of additives aggregate gradation and debugging, developed a kind of high strength with good mobility grout. The grouting material is greater than the initial flow of 335 mm, 1 h flow of up to 260 mm, high strength hardened paste, 2h strength up to 22 MPa, 24h compressive strength of up to 40 MPa, its performance to meet the standards of the domestic advanced level . The grout has high mobility, without vibration or less self-leveling and vibration can be filled with templates and the ability to maintain no segregation, no bleeding, even forming quality, does not produce normal concrete due to vibration honeycomb quality defects and internal cavities, such as fully produced, It is a kind of development prospects material.

Keywords: Grout; fluidity; performance

0.前言

混凝土灌浆料与传统的细石混凝土相比,具有流动性更好、强度更高和施工易于控制的特点;与传统环氧砂浆相比,具有 膨胀性好、施工简便快捷等特点。自20世纪90年代初,我国自主研发生产的混凝土灌浆材料在众多大中型企业的设备安装、建筑结构加固改造工程以及桥梁工程中得到广泛应用。

混凝土灌浆料是以高强度材料作为骨料,以水泥作为结合剂,辅以高流态、微膨胀、防离析等物质配制而成。它在施工现场加入一定量的水,搅拌均匀后即可使用。它是一种具有早强、高强、微膨胀和耐久性好等多种优点的新型复合材料,是将流态混凝土技术、高强混凝土技术、膨胀混凝土技术和外加剂应用技术等多中现代混凝土技术有效运用的结果。

1 实验材料

(1)水泥:采用长春亚泰水泥公司生产的P·O 42.5#普通硅酸盐水泥。……

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