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Flexural strength and failure trend of bamboo and coir reinforced cement stabilized rammed earth wallettes
Construction and Building Materials ( IF 7.4 ) Pub Date : 2020-01-17 , DOI: 10.1016/j.conbuildmat.2019.117986
Deb Dulal Tripura , Satish Gupta , Bandana Debbarma , Raavi Satya Sai Deep

Present study investigates the flexural strength and failure trend of unstabilized and cement stabilized rammed earth (CSRE) wallette with and without bamboo and coconut fiber reinforcement. Twenty four wallettes were prepared and tested under lateral load applied parallel and perpendicular to the compacted layers. Test results shows that the wallette loaded perpendicular to compacted layers/bed joints possesses higher flexural strength. CSRE wallette reinforced with bamboo and fiber shows 139% to 167% higher flexural strength than that of unstabilized rammed earth and shows improved ductility property. Flexural strength obtained in the current study ranges from 0.54 MPa to 2.11 MPa which is comparable to good quality burnt clay bricks masonry wallette strength. Initial failure cracks was observed at bed joint and mid-span for unreinforced samples and shear cracks was observed for bamboo and fiber reinforced samples. Lastly, the reinforced walls can be used for strengthening single leaf internal and external load bearing walls of single or two storey houses depending upon area seismicity.



中文翻译:

竹椰纤维水泥稳定夯土钱包的抗折强度及破坏趋势

目前的研究调查了有无竹纤维和椰子纤维增强的不稳定和水泥稳定夯土(CSRE)薄板的抗弯强度和破坏趋势。制备二十四个钱包,并在平行于和垂直于压实层的横向载荷下进行测试。测试结果表明,垂直于压实层/床缝加载的钱包具有较高的抗弯强度。用竹纤维增强的CSRE墙板的抗弯强度比未夯实的夯土高139%至167%,并具有改善的延展性。在当前研究中获得的抗弯强度在0.54 MPa至2.11 MPa的范围内,与高质量的烧制粘土砖砌体墙板强度相当。对于未增强的样品,在床缝和中跨处观察到初始破坏裂纹,对于竹纤维增强的样品,观察到剪切裂纹。最后,根据地区地震的影响,加固墙可用于加固单层或两层房屋的单扇内部和外部承重墙。

更新日期:2020-01-17
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