Geological and Geotechnical Assessment of Aggregates Used in Nagar Parker District Tharparkar Sindh Pakistan

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-03-19 DOI:10.2478/ama-2023-0017

M. A. Kalwar

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Abstract

Abstract This study aims to determine the geology of granite and evaluate the engineering properties of the samples to make recommendations for the construction industry. The study area is situated in the Nagar Parker complex in Pakistan, which is located in the extreme south-east of the Thar District and the desert of the Sindh Province, near the Run of Kutch (240° 15′–35 30′ N, 70° 40′–58 07′ E), and it covers ca. 500–1,000 km2. In this region, several Quaternary deposits, subordinate and dispersed Jurassic–Tertiary sandstones and clays are overlying the Nagar Igneous Complex basement. According to international standards, there are various possible aggregate sources. However, only a few of them have been reviewed for suitability reasons. Six quarries in Nagar Parker, Pakistan, were selected for evaluation as coarse aggregate in concrete construction and civil engineering works in this research. Although the aggregates from the six quarries are specified and already widely used in the Sindh Province, there is a lack of studies on their geological properties. The results of the presented research revealed that samples from Dhedvero, Karai, Nagarparkar, Mokrio, Dinsi and Wadlai meet all of the international standard requirements for aggregates. Geotechnical, petrographic and geochemistry laboratory tests were conducted in this research and included bulk density, water absorption, specific gravity test, index of flakiness and elongation, soundness aggregate test, crushing value aggregate, impact value aggregate and abrasion value of Los Angeles. Furthermore, chemical alkali-silica reaction potential test and petrographic examination were tested. As a result, we evaluated the properties of granite, which is a crystalline igneous rock with a visibly crystalline structure and texture, made up of feldspar, i.e., potash feldspar and oligoclase. The evaluated minerals are compatible with the standards of civil engineering works and can be used as a concrete aggregate. The evaluated three types of minerals included Dhedvero simple intrusion, Nagar pink granite and grey granite.

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巴基斯坦信德省塔尔帕尔卡省纳加尔帕克区骨料的地质和岩土工程评估

摘要本研究旨在确定花岗岩的地质性质，评价样品的工程性能，为建筑业提供建议。研究区域位于巴基斯坦的Nagar Parker综合体，位于Thar地区的最东南方和信德省的沙漠，靠近Kutch Run(240°15′-35 30′N, 70°40′-58 07′E)，面积约500 - 1000平方公里。在该地区，纳格尔火成岩杂岩基底上覆有几处第四纪沉积，隶属于分散的侏罗系—第三系砂岩和粘土。根据国际标准，有各种可能的汇总来源。但是，由于适用性的原因，只对其中少数几个进行了审查。本研究选择巴基斯坦纳加尔帕克的六个采石场作为混凝土建筑和土木工程工程中的粗骨料进行评价。尽管来自六个采石场的骨料被指定并已在信德省广泛使用，但缺乏对其地质性质的研究。研究结果表明，来自dehedvero、Karai、Nagarparkar、Mokrio、Dinsi和Wadlai的样品符合骨料的所有国际标准要求。本研究进行了岩土学、岩石学和地球化学实验室测试，包括体积密度、吸水率、比重测试、片状度和伸长率指数、安定性骨料测试、破碎值骨料、冲击值骨料和洛杉矶磨损值骨料。此外，还进行了化学碱-硅反应电位测试和岩相检查。因此，我们评估了花岗岩的性质，它是一种晶体火成岩，具有明显的晶体结构和纹理，由长石组成，即钾长石和寡长石。经鉴定的矿物符合土建工程标准，可作为混凝土骨料使用。评价的3种矿物类型包括:德赫德维罗简单侵入岩、纳加尔粉花岗岩和灰色花岗岩。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.