摘要
根据新老混凝土修补界面层的粘结机理 ,提出通过改善界面层微细观结构来大幅度提高修补界面层粘结强度的思路。对比试验研究表明 ,用稀HCl酸蚀老混凝土界面可大幅度提高老混凝土界面的微细观粗糙度 ,从而显著增加新老混凝土的接触面积 ;用粉煤灰和标准砂对水泥净浆界面剂进行改性可显著改善界面层的微细观结构。以上两项措施均可使粘结强度显著提高。
Based on the bonding mechanism of new and old concrete repair interface layer, an idea to significantly increase bonding quality by means of improving microstructure of repair interface layer was proposed. The comparative test results showed that acid corroding of old concrete interface may result in a significant increase of micro roughness of old concrete interface, leading to a significant increase of contact area of new and old concrete; and the modification of cement paste primer by introducing fly ash and sand improved both microstructure and macrostructure of new and old concrete interface layer greatly. Both methods could increase the bond strength of new and old concrete interface significantly.
出处
《工业建筑》
CSCD
北大核心
2001年第11期70-72,共3页
Industrial Construction
基金
广东省自然科学基金资助项目 (项目批准号 :990 791)
关键词
混凝土结构
修补界面层
酸蚀
微细观粗糙度
粉煤灰
粘结
new and old concrete repaired interface layer\ acid corroding\ micro roughness\ fly ash\ microstructure
