Materials and Structures ( IF 3.4 ) Pub Date : 2021-08-02 , DOI: 10.1617/s11527-021-01761-3 José Álvarez-Pérez 1 , Milena Mesa-Lavista 1 , Jorge H. Chávez-Gómez 1 , Gerardo Fajardo-San Miguel 1
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In this paper, an experimental and statistical analysis was carried out from hollow concrete blocks. Firstly, 30 blocks were tested under compression force (vertical-direction). After, 60 blocks were studied under the splitting test from ASTM–C–1006 and, later a direct tensile test was applied to other 60 blocks. The blocks, in the direct tensile test, were subjected to a tensile force in the horizontal directions (30 in each directions). For the direct tensile test, a special test procedure was developed. The results show that, independently of the test procedure applied (direct or splitting), the tensile strength has a significant statistical difference between both horizontal directions (x and y), evidencing the non–isotropy character from the hollow concrete blocks. Splitting method results was significantly smaller in the x–direction than by the direct method, contrary in the y–direction. A statistical analysis of parametric and non-parametric hypothesis tests was used to determine the significance levels between both test procedures. In addition, this article concludes with a discussion between the compressive and tensile strength relationships in the orthogonal directions of the hollow concrete blocks.
Graphical abstract
中文翻译：
空心混凝土砌块抗拉强度试验研究
在本文中，对空心混凝土砌块进行了实验和统计分析。首先，在压缩力（垂直方向）下测试了 30 个块。之后，在 ASTM-C-1006 的劈裂试验下研究了 60 个块，然后对其他 60 个块进行了直接拉伸试验。在直接拉伸试验中，块体在水平方向（每个方向 30 个）受到拉伸力。对于直接拉伸试验，开发了一种特殊的试验程序。结果表明，独立于应用的测试程序（直接或分裂），拉伸强度在两个水平方向（x和y)，证明了空心混凝土砌块的非各向同性特征。分割方法在x方向上的结果明显小于直接方法，而在y方向上则相反。参数和非参数假设检验的统计分析用于确定两个检验程序之间的显着性水平。此外，本文最后讨论了空心混凝土砌块正交方向上的抗压强度和抗拉强度关系。
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