- 摘 要
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（西安理工大學(xué)土木建筑工程學(xué)院， 西安 710048）
［摘要］選用32-5R復(fù)合硅酸鹽水泥作為主要膠凝材料，通過正交試驗，研究了水膠比、膠砂比、粉煤灰、硅灰、膨脹劑和減水劑對水泥基灌漿料基本力學(xué)性能的影響，涉及到的主要性能指標為灌漿料的初始和30min流動度、7d和28d抗壓及抗折強度。試驗結(jié)果表明：水膠比和膠砂比對水泥基灌漿料的綜合性能影響最為顯著，減水劑的影響作用較??；粉煤灰、硅灰對其流動度及28d強度影響較大；膨脹劑對其7d強度影響較大，尤其是抗折強度，對其他性能的影響不顯著；以水泥基灌漿料28d高強度為目標，較大流動度為條件，得到優(yōu)化的最佳因素水平組合為A2B2C1D3E2F2，即水膠比為0-34、膠砂比為1[DK]∶1-2、粉煤灰摻量為15%、硅灰摻量為8%、膨脹劑摻量為10%、減水劑摻量為1-00%。
［關(guān)鍵詞］水泥基灌漿料； 流動度； 抗壓強度； 抗折強度； 正交試驗
中圖分類號：TU525文獻標識碼：A文章編號：1002-848X(2019)02-0064-06
Orthogonal test study on basic mechanical properties of high strength cement-based grouting material
Kou Jialiang, Yu Danhong, Zhang Haobo
(School of Civil Engineering & Architecture, Xi′an University of Technology, Xi′an 710048, China)
Abstract:The 32-5R composite Portland cement was selected as the main cementitious material. The influences of ratio of water-to-binder ratio, mortar-to-cement ratio, fly ash, silica fume, expansion agent and water reducing agent on basic mechanical properties of cement-based grouting material were studied by orthogonal test. The main performance indicators involved were the initial and 30 min fluidity of the grouting material, the 7d and 28d compressive and flexural strengths. The test results show that the water-to-binder ratio and mortar-to-cement ratio have the most significant effect on the comprehensive performance of cement-based grouting material, and the effect of water reducing agent is smaller; fly ash and silica fume have greater influence on fluidity and 28d strength; the water reducing agent has a great influence on the 7d strength, especially the flexural strength, and its effect on other properties is not significant; with the 28d high strength of cement-based grouting material as the target and the large fluidity as the condition, the optimal combination of the best factors is A\-2B\-2C\-1D\-3E\-2F\-2, that is, the water-to-binder ratio is 0-34, the mortar-to-cement ratio is 1[DK]∶1-2, and the fly ash content is 15%, the amount of silica fume is 8%, the amount of expansion agent is 10%, and the amount of water reducing agent is 1-00%.
Keywords:cement-based grouting material; fluidity; compressive strength; flexural strength; orthogonal test
*國家自然科學(xué)基金資助項目(51408487)，中國住建部科學(xué)技術(shù)資助項目(2014-K2-037)，中國博士后科學(xué)基金第56批面上資助項目(2014M562437)，陜西省自然科學(xué)基金資助項目(2014JQ7292)，陜西省教育廳專項科學(xué)研究計劃資助項目(14JK1516)，陜西省博士后科學(xué)基金資助項目，西安市建設(shè)科技項目(SJW2015-09)，西安理工大學(xué)科學(xué)研究計劃資助項目(118-211403)。
作者簡介：寇佳亮，博士，副教授，Email: jialiangkou0918@163.com。
