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建筑石膏與膠凝材料
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早強型水泥基灌漿料的試驗研究

作者:丁泓力1,黃暉2

關鍵字:早強型,水泥,基灌,漿料,的,試驗,研究,江西,

 
(1.江西經濟管理干部學院 建筑工程管理系,江西 南昌  330088;2.東華大學 理學院,上海  201620)
    摘要:水泥基灌漿料以水泥、礦物摻合料為主要膠凝材料,與外加劑(減水劑、膨脹劑、早強劑、消泡劑等)、微細集料和合適級配的砂等加水攪拌混合后制成,具有大流態、很高的后期強度和微膨脹等特點。通過調整普通硅酸鹽水泥以及礦物摻合料不同比例,以硫代硫酸鈉、元明粉及純堿為早強劑,成功配制出具有大流態、較好早強效果的水泥基灌漿料。試驗結果表明:隨著普通硅酸鹽水泥摻量的增加,初始及30 min流動度呈現下降趨勢,漿體越來越粘稠,當普通硅酸鹽水泥摻量由30%增加到55%時,初始流動度損失13%,30 min流動度損失27%;當普通硅酸鹽水泥摻量為40%~45%時,水泥基灌漿料各項性能指標較佳。
    關鍵詞:水泥灌漿料;普通硅酸鹽水泥;硅灰;早強劑
    中圖分類號:TU57+8.1        文獻標識碼:A        文章編號:1001-702X(2019)11-0136-04
 
Experimental study on an early strength cement-based grouting material
DING Hongli1,HUANG Hui2
(1.Department of Construction and Engineering Management,Jiangxi Institute of Economic Administrators,Nanchang 330088,China;
2.College of Science,Donghua University,Shanghai 201620,China)
    Abstract:Cement based grouting material was prepared by taking cement and mineral admixtures as the main cementing material,mixing with additives (water reducing agent,expansion agent,early strength agent,and defoaming agent),micro aggregate and sand with appropriate gradation, having the characteristics of high flow and very high later-phase strength and micro expansion. Through adjusting the different proportion of ordinary Portland cement and mineral admixture,with sodium thiosulfate,sodium sulfate and sodium carbonate as early strength agent,cement based grouting material with large flow and good early strength was prepared. The test results show that with Portland cement content increasing,the initial fluidity and fluidity of 30 min showed a downward trend,becoming more and more viscous. When the content of ordinary Portland cement is from 30% to 55%,the initial fluidity loss is 13%,and the 30 min fluidity loss is 27%. When the content of Portland cement is 40%~45%,the performance index of cement based grouting material is the best.
    Key words:cement grouting material,ordinary Portland cement,silica fume,early strength agent
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