- 摘 要
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（1 鹽城工學院土木工程學院，鹽城 224051； 2 蘇州科技學院土木工程學院，蘇州 215011）
［摘要］為了研究織物增強磷酸鎂水泥基細骨料混凝土(TRC-M)薄板與老混凝土的界面粘結性能，制作了51個試件進行雙面剪切試驗，考察了人工鑿糙、植筋、開槽等不同界面處理方式和不同老混凝土強度等級對界面粘結性能的影響。試驗結果表明，對老混凝土進行鑿糙、植筋、開槽處理，均可不同程度地提高TRC-M薄板加固試件的界面粘結性能，鑿糙的效果優(yōu)于開槽，開槽的效果優(yōu)于植筋；試件的界面抗剪強度隨粗糙度、開槽密度、植筋率的增加均呈先增后減趨勢；隨老混凝土強度等級增加，鑿糙、植筋、開槽試件的界面抗剪強度均呈下降趨勢；采用磷酸鎂水泥作為加固層基體時試件的界面抗剪強度明顯高于采用普通硅酸鹽水泥作為基體時的。
［關鍵詞］織物增強混凝土； 界面粘結； 植筋； 粗糙度； 抗剪強度
中圖分類號：TU528-043, TU375-1文獻標識碼：A文章編號：1002-848X(2017)15-0070-06
Experimental research on bonding behavior of textile reinforced magnesium-phosphate cement based concrete sheet with old concrete
Zhi Zhengdong1, Chen He1,2, Xun Yong1, Du Yubing1, Jia Cheng1
(1 School of Civil Engineering, Yancheng Institute of Technology, Yancheng 224051, China; 2 College of Civil Engineering,University of Science and Technology of Suzhou, Suzhou 215011, China)
Abstract:In order to study on bonding behavior of textile reinforced magnesium-phosphate cement based fine aggregate concrete（TRC-M）sheet with old concrete, a total of 51 double-sided shear test specimens were produced in this experiment. The effects of different interfacial techniques, including artificial chiseling, grooving and reinforced bar planting, as well as different old concrete strength grade on the shear properties were investigated. The experimental results show that the bonding behavior between TRC-M sheet and old concrete are varying degrees improved by the above different interfacial techniques. Effect of artificial chiseling technique is better than the grooved technique and the effect of grooved technique is better than reinforced bar planting technique. Interfacial shear strength of the specimen first increases then decreases with increase of roughness, slotting density and anchorage rates. Interfacial shear strength of the specimens shows a decreasing trend with increase of old concrete strength. Interfacial shear strength of the specimens with magnesium phosphate cement as matrix is higher than that with portland cement as matrix.
Keywords:textile reinforced concrete; interfacial bond; reinforced bar planting; interfacial roughness; shear strength
*國家自然科學基金項目（51478408），住房和城鄉(xiāng)建設部科技項目（2013-K4-42、2015-K4-012），江蘇省建設系統(tǒng)科技項目（2014ZD08）。
作者簡介：支正東，碩士，副教授，Email：zhizhengdong@163.com。
