EPS外墙外保温系统聚氨酯粘结胶加固后受力性能试验研究  

Experimental study on the stress performance of EPS external wall insulation system reinforced with polyurethane adhesive

作　　者：李安起[1,2] 郑义 张国强[2] 韩志国 李靖[1] LI Anqi;ZHENG Yi;ZHANG Guoqiang;HAN Zhiguo;LI Jing(Shandong Jianzhu University,Ji'nan 250101,China;Institute of Engineering Appraisal and Strengthening,Shandong Jianzhu University,Ji'nan 250013,China)

机构地区：[1]山东建筑大学,山东济南250101 [2]山东建筑大学工程鉴定加固研究院有限公司,山东济南250013

出　　处：《新型建筑材料》2024年第8期18-24,37,共8页New Building Materials

摘　　要：通过EPS保温板抗拉试验、疲劳试验、加固疲劳试验,研究粘贴率、粘贴方式对EPS板及聚氨酯粘结胶加固试样的抗拉承载力和疲劳性能影响。结果表明:除满粘外,在相同条件下,EPS板抗拉承载力平均值由大到小为:条粘>点粘>十字粘>点框粘;EPS板疲劳次数与粘贴率呈正相关,条粘法疲劳性能最好;采用聚氨酯粘结胶加固后的试样抗拉承载力平均值均符合要求,且达到满粘抗拉承载力的90%;初始疲劳对加固效果的影响最大仅7%,加固后点粘、条粘、十字粘、点框粘的疲劳次数分别达到满粘的87%、89%、87%、75%;聚氨酯粘结胶加固后累计疲劳次数更多,EPS板整体使用寿命得到延长,加固方法较为可靠。Design tensile tests,fatigue tests,and reinforcement fatigue tests for EPS insulation boards,and study the effects of bonding rate and bonding method on the tensile bearing capacity and fatigue performance of EPS boards and polyurethane adhesive reinforced specimens.The results show that under the same conditions,except for full adhesion,the average tensile bearing capacity of EPS board is as follows:strip adhesion>point adhesion>cross adhesion>point frame adhesion,from high to low.The fatigue number of EPS boards is positively correlated with the bonding rate,and the strip bonding method has the best fatigue performance.The average tensile bearing capacity of the specimens reinforced with polyurethane adhesive meets the standard requirement and reaches at least 90%of the full adhesive tensile bearing capacity.The maximum impact of initial fatigue on the reinforcement effect is only 7%,and the fatigue times of point bonding,strip bonding,cross bonding,and point frame bonding after reinforcement reach at least 87%,89%,87%,and 75%of full bonding,respectively.The cumulative fatigue times after polyurethane adhesive reinforcement are more,and the overall service life of the EPS board is extended,the reinforcement method is relatively reliable.

关 键 词：EPS保温板 抗拉承载力 疲劳试验 受力性能 聚氨酯粘结胶加固 

分 类 号：TU551.2[建筑科学—建筑技术科学]