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（1 中國建筑科學研究院有限公司， 北京 100013; 2 北京珠穆朗瑪綠色建筑科技有限公司， 北京 102212）
［摘要］為研究施工質量缺陷對混凝土結合面粘結強度的影響，考慮結合面是否清理和是否灑水濕潤兩種處理情況，共4種工況，結合工程實際設計了結合面不同處理狀況下的混凝土疊合試件，并采用鉆芯植筋拉拔法對混凝土結合面正拉粘結強度進行了試驗研究。研究結果表明：鉆芯植筋拉拔法用于原位檢測混凝土結合面粘結強度是可行的；就粘結強度而言，結合面是裝配式混凝土結構的薄弱部位；表面處理情況對混凝土結合面粘結強度有明顯影響，結合面粘結強度隨積灰面積的增大基本呈線性下降趨勢；通過比較結合面粘結強度值可反映二次澆筑施工質量。研究結果可為結合面施工質量檢測評定以及工程驗收提供參考和依據(jù)。
［關鍵詞］裝配式結構； 混凝土； 結合面； 粘結強度； 質量缺陷； 鉆芯植筋拉拔
中圖分類號：TU375文獻標識碼：A文章編號：1002-848X(2018)23-0017-05
Experimental study on bond strength of concrete interface of prefabricated structure
Zhang Jinfeng1， Sun Bin1， Mao Shiyang1， Wang Ni1, Zhang Yuzhao2
(1 China Academy of Building Research， Beijing 100013， China；2 Beijing Everest Green Building Technology Co.， Ltd.， Beijing 102212， China)
bstract:In order to study the effect of construction quality flaw on the bond strength of concrete interface, the concrete composite specimens under different treatment conditions on interface were designed by considering whether the interface to be cleaned or to be wetted, total four working conditions. Combining with engineering practice, experiments on normal bond strength test of concrete interface were carried out by core-drilling and pull-stripping with embedded bar. Study results indicate that: the method of core-drilling and pull-stripping with embedded bar is feasible for bond strength inspection of concrete interface in situ; the interface was the weak part of the prefabricated concrete structure in terms of bond strength; the surface treatment has a significant influence on the bond strength of concrete interface, and with the increase of the dust area, the bond strength of interface decrease basically linearly; the construction quality of the secondary pouring can be reflected by comparing the bond strength value of interface. The research results can provide reference and basis for the quality inspection, evaluation and construction acceptance of interface construction.
Keywords:prefabricated structure; concrete; interface; bond strength; quality flaw; core-drilling and pull-stripping with embedded bar
*國家重點研發(fā)計劃項目（2016YFC0701800），中國建筑科學研究院應用技術研究課題（20150112330730050），住房和城鄉(xiāng)建設部科技項目（2016-K5-043）。
作者簡介：張晉峰，碩士，工程師，Email：20588951@qq.com。
