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首页> 外文期刊>Materials and structures >Predicting the effect of crushed brick particle size on anisotropy, physical and mechanical properties of compressed stabilized earth blocks using ultrasonic pulse velocity
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Predicting the effect of crushed brick particle size on anisotropy, physical and mechanical properties of compressed stabilized earth blocks using ultrasonic pulse velocity

机译：使用超声脉冲速度预测压碎砖粒度对压缩稳定地球块各向异性，物理和力学性能的影响

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摘要

An attempt has been made to assess the quality of compressed stabilized earth blocks (CSEBs) through non-destructive testing. As a potential approach, this study analyzes the influence of crushed brick waste (CBW) particle size and replacement ratio on compressive strength and structural anisotropy of CSEBs using ultrasonic pulse velocity (UPV). The correlations between UPV measurements, dry density and the compressive strength were analyzed. Furthermore, microscopic observations were undertaken to emphasize the particle interface bonding. A statistical analysis was then conducted to predict the compressive strength in terms of CBW content, dry density and anisotropy for three types of CBW. The results manifest that UPV is a complementary method to evaluate the influence of particle size on mechanical performance of CSEB. Irrespective of CBW particle size, the block compressive strength decreases as the replacement percentage reaches to 100% which is well spotted by UPV values. The effect of removal of fines has hardly any influence on UPV readings. Block density reduces by almost 25.5% compared to reference, when sand was completely replaced with CBW of particle size less than 0.15 mm. CBW particle size affects the relation between strength and UPV in different ways. However, a significant exponential correlation 0.94 was found for CSEBs produced with CBW particle size lesser than 0.15 mm. For the three types of CBW a strong correlation between dry density and UPV was established. SEM analysis showed distinct morphology of CSEBs with CBW particle size and replacement ratio. The proposed equation can predict the compressive strength with correlation coefficient (R2) of 0.87, 0.95 and 0.95 for CF, CM and CL blocks.
机译：已经尝试通过非破坏性测试评估压缩稳定的地球块（CSEBS）的质量。作为一种潜在的方法，本研究分析了使用超声波脉冲速度（UPV）对CSESB抗压强度和结构各向异性的碎砖废物（CBW）粒度和替代比的影响。分析了UPV测量，干密度和抗压强度之间的相关性。此外，进行了显微镜观察以强调颗粒界面粘合。然后进行统计分析以预测CBW含量，干密度和三种CBW各向异性的抗压强度。结果表明，UPV是评估粒度对CSEB机械性能影响的互补方法。无论CBW粒径如何，随着替换百分比达到100％，块抗压强度降低到100％，其通过UPV值良好地发现。去除罚款的效果对UPV读数几乎没有任何影响。与参考相比，嵌段密度几乎减少了近25.5％，当砂砂完全替换为小于0.15mm的CBW。 CBW粒度以不同方式影响强度和UPV之间的关系。然而，发现用CBW粒度小于0.15mm产生的CSEBS的显着指数相关性相关性。对于三种类型的CBW，建立了干密度和UPV之间的强相关性。 SEM分析显示CBW粒度和更换比的CSCEBS不同的形态。所提出的等式可以预测CF，CM和CL块的相关系数（R2）的抗压强度（R2）。

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