Experimental Characterization of Shape of an Aggregate by a Numerical Value—Application to Senegalese Basaltic Aggregates for Rail Transport

Abdoulaye Diedhiou; Libasse Sow; Ndeye Mareme Diop

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Experimental Characterization of Shape of an Aggregate by a Numerical Value—Application to Senegalese Basaltic Aggregates for Rail Transport

机译：用数值应用对塞内加尔玄武岩骨料施用的骨料形状的实验表征

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This article first talks about railways in general and ballast in particular. An inventory is then made on the modernization of the Senegalese ballast railways. In the second phase, an experimental work of characterization of basaltic aggregates of Diack (Locality of Ngoundiane, Thiès region, Senegal) is presented. The grain size studied is 25/50 mm as for any material studied for use as railway ballast. Experimental work presented consists of the characterization of the shape of an aggregate using the NF P 18-301 standard. The test consists of comparing the volume of the aggregate to that of an equivalent sphere with the largest diameter of the aggregate, by calculating the average volume coefficient. With a Representative Elementary Volume (REV) of 6 aggregates, the volume coefficient “Cv” fluctuates between 0.27 and 0.49 with an average volume coefficient of 0.39 which is well above 0.15. The grains studied are polyhedral and therefore have a high mechanical resistance.

机译：本文首先谈论一般的铁路和镇流器。然后对塞内加尔镇流器铁路的现代化进行了清单。在第二阶段，介绍了Diadck（Ngoundiane，Ngoundiane，Thiès地区，塞内加尔）玄武岩骨料的表征的实验工作。研究的晶粒尺寸为25/50毫米，因为任何用于使用作为铁路镇流器的材料。提出的实验工作包括使用NF P 18-301标准的聚集体形状的表征。该测试包括通过计算平均体积系数来将聚集体的体积与聚集体的最大直径的相同球的体积进行比较。对于6聚集体的代表性基本体积（Rev），体积系数“CV”在0.27和0.49之间波动，平均体积系数为0.39，其远高于0.15。研究的晶粒是多面体，因此具有高机械性。

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来源
《土木工程期刊（英文）》 |2020年第002期|P.131-142|共12页
作者
Abdoulaye Diedhiou; Libasse Sow; Ndeye Mareme Diop;
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作者单位

Civil Engineering Department Higher Polytechnic School Cheikh Anta Diop University of Dakar Dakar Senegal;

Civil Engineering Department Higher Polytechnic School Cheikh Anta Diop University of Dakar Dakar Senegal;

Civil Engineering Department Higher Polytechnic School Cheikh Anta Diop University of Dakar Dakar Senegal;

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正文语种 chi
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关键词
Ballast; Rail Transport; Basalt; Shape; Volume Coefficient;

机译：镇流器;铁路运输;玄武岩;形状;体积系数;

Experimental Characterization of Shape of an Aggregate by a Numerical Value—Application to Senegalese Basaltic Aggregates for Rail Transport

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