生土自嵌固空心砖抗压抗折性能试验研究

（1.长安大学 建筑工程学院，陕西 西安  710061；2.北京特种工程设计研究院，北京  100028）

    摘要：为改进传统土坯砌体结构的缺点，分别选取水泥和麦秸为单掺改性材料，用于制作一种新型生土自嵌固空心砖。通过对各类试块进行单轴抗压和三点抗折试验，对比分析了素土和单掺改性材料试块在强度、破坏形态、变形能力等方面的差异。试验结果表明：砖的孔洞是受力薄弱部位，但与传统土坯相比，生土自嵌固空心砖有较高强度；掺入水泥能提高试块的抗压强度和抗折强度，掺入麦秸能提高试块的变形能力并改善脆性破坏特征，水泥和麦秸的最佳掺量分别为4.5%和0.2%。

    关键词：生土自嵌固空心砖；破坏形态；抗压强度；抗折强度；改性

    中图分类号：TU552.1+4        文献标识码：A        文章编号：1001-702X（2018）08-0063-05

 

Experimental research on compressive and flexural performance of

raw-soil interlocking compressed hollow brick

WANG Yihong1，LIU Le1，WANG Tianya1，HAO Zhenfen2，XU Xun1

（1.School of Civil Engineering，Chang'an University，Xi'an 710061，China；

2.Beijing Special Engineering Design and Research Institute，Beijing 100028，China）

   Abstract：To change the defects of adobe masonry structure，cement and straw were applied as single modified material to prepare a new type of raw-soil interlocking hollow brick. The differences in strength，failure mode，deformability of all kinds of specimens were compared and analyzed by uniaxial compression test and three-point flexural test. The test results showed that the hole of the brick is the weak part under force，but compared with traditional adobe this kind of brick still performed higher strength. Cement can increase compressive and flexural strength of the specimen and straw can improve deformation ability and brittle failure characteristics of the specimens. The effect of cement and straw would be best when their content is 4.5% and 0.2%.

    Key words：raw-soil interlocking compressed hollow brick，failure mode，compressive strength，flexural strength，modification