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首页> 外文期刊>International Journal of Applied Environmental Sciences >Evaluation of Coal Mine Overburden Clay for Assessing Its Suitability for Brick Making
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Evaluation of Coal Mine Overburden Clay for Assessing Its Suitability for Brick Making

机译：煤矿覆盖粘土评价评估其适用于砖砌的适用性

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摘要

Coal mining in India generates huge quantity of overburden waste rock which mainly consists of sandstone. Sandstone found with coal seam is generally argillaceous and hence sand and cementing material can be easily segregated by simple crushing and washing. Sand can be utilized as a fine aggregate in concrete and cementing material which is generally clay minerals has a potential to be used in bricks making. This paper describes a study carried out to investigate the possibility of utilizing clay obtained from overburden waste rock of a large opencast coal mine located in Chhattisgarh state of India. Overburden samples were collected from the mine and mixed with water in the laboratory to separate clay particles from sand particles by sedimentation and decantation method. The obtained clay was sundried and its suitability was assessed for making solid burnt clay bricks and compressed stabilized earth blocks (CSEB). The chemical composition of the clay was determined by XRF analysis and specific gravity, texture , plasticity index and liner shrinkage were determined by using methods prescribed in relevant IS codes. The optimum moisture content and maximum dry density was determined by using method prescribed in relevant ASTM code. Chemical constituents wise, the clay was found suitable for making both types of bricks. Texture analysis indicates that the clay contains a high amount of silt size particles and due to which its plasticity index was also found less than the desirable value. The texture and plasticity index of the clay can be improved simply by adding some sand size particles which were separated from it during washing of overburden waste rock and clay can be utilized for making both burnt bricks and CSEB.
机译：印度的煤炭开采产生了大量的覆盖覆盖岩，主要由砂岩组成。用煤层发现的砂岩通常是骨质的，因此通过简单的破碎和洗涤可以容易地隔离砂岩，因此可以容易地隔离。砂可以用作混凝土和固井材料中的细骨料，这通常是粘土矿物的潜力在砖制作中。本文介绍了一个研究，以调查利用从位于印度Chhattisgarh州的大型Opencast煤矿的覆盖物覆盖岩石中获得的粘土。从矿井中收集过覆盖样品，并用实验室中的水混合，通过沉降和倾析方法将粘土颗粒与砂颗粒分离。得到了所得粘土，并评估其适用性以使固体烧焦粘土砖和压缩稳定的地球嵌段（CSEB）。通过XRF分析和比重测定，通过使用相关代码规定的方法测定粘土的化学成分和比重，质地，塑性指数和衬里收缩。通过使用相关ASTM代码中规定的方法测定最佳水分含量和最大干密度。化学成分明智，发现粘土适用于制作两种砖块。纹理分析表明粘土含有大量的淤泥尺寸颗粒，并且由于其塑性指数也发现小于所需值的塑性指数。只需添加一些砂尺寸颗粒即可改善粘土的纹理和塑性指数，该砂尺在覆盖物的洗涤过程中与其分离，覆盖物废岩石和粘土可用于制作烧焦的砖和CSEB。

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