Proceedings of International Symposium on Earth Resources Management & Environment 2022最新文献_第2页

Experimental Investigation on Factors Affecting the Bulking of Aggregate Quarry Products 影响骨料采石场产品膨胀因素的试验研究

Proceedings of International Symposium on Earth Resources Management & Environment 2022 Pub Date : 2022-12-23 DOI: 10.31705/iserme.2022.4

W. Wijethunga, A. Aththanayake, Uasb Weerasinghe, Imtn Illankoon, Abn Dassanayake, Sp Chaminda

{"title":"Experimental Investigation on Factors Affecting the Bulking of Aggregate Quarry Products","authors":"W. Wijethunga, A. Aththanayake, Uasb Weerasinghe, Imtn Illankoon, Abn Dassanayake, Sp Chaminda","doi":"10.31705/iserme.2022.4","DOIUrl":"https://doi.org/10.31705/iserme.2022.4","url":null,"abstract":"Aggregate quarry products have long been essential to the construction sector. These aggregate products are produced by blasting the in-situ rock at quarries and subjecting it to primary and secondary crushing. There is a volume change when converting in-situ rock volume into the product volume because of a phenomenon called bulking, which happens when the rock is broken down into smaller particle sizes. Air spaces develop between the rock particles during blasting and crushing activities increasing the volume of quarry products. This study aims to investigate the effect of moisture content, particle size and rock type on bulking of aggregate quarry products. Quarry products (Dust, Chip, ¾” metal ,1.5” metal and ABC [Aggregate-Base-Course]) were collected systematically from six quarries and the bulking factor was tested in different moisture conditions. Furthermore, the mineralogy and specific gravity of collected samples were determined by visual observations and pycnometer method respectively. This study identified that quarry dust and the ABC product exhibit significant deviations in bulking factor with changing moisture content, whereas other products (Chip, ¾” metal and 1.5” metal) exhibit no discernible deviations in bulking factor with increasing moisture content and identified that mineralogy almost no effect to the bulking factor since study area contains similar kind of mineralogy.","PeriodicalId":153701,"journal":{"name":"Proceedings of International Symposium on Earth Resources Management & Environment 2022","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124292484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Upgradability of Quarry Dust Use as a Substitute for River Sand in Plastering Works in Construction Industry 采石场粉尘替代河砂在建筑业抹灰工程中的可升级性

Proceedings of International Symposium on Earth Resources Management & Environment 2022 Pub Date : 2022-12-23 DOI: 10.31705/iserme.2022.14

K. Weerarathne, S. Krishanth, S. Vithulyan, Dmc Dissanayake

引用次数: 0

Determining the Invasive Plant Dynamics in Bolgoda Lake Using Open-source Data 利用开源数据确定Bolgoda湖入侵植物动态

Proceedings of International Symposium on Earth Resources Management & Environment 2022 Pub Date : 2022-12-23 DOI: 10.31705/iserme.2022.15

K.A.T.T Kannangara, M.B. Shoukie, M.P.A. Nayomi, SM Dassanayake, Abn Dassanyake, C. Jayawardena

{"title":"Determining the Invasive Plant Dynamics in Bolgoda Lake Using Open-source Data","authors":"K.A.T.T Kannangara, M.B. Shoukie, M.P.A. Nayomi, SM Dassanayake, Abn Dassanyake, C. Jayawardena","doi":"10.31705/iserme.2022.15","DOIUrl":"https://doi.org/10.31705/iserme.2022.15","url":null,"abstract":"Identifying invasive plants (IP) and monitoring their dynamics is essential to minimize potential adverse effects on natural resources. Remote sensing (RS) could effectively cater to such requirements by acquiring data in many critical domains. Limitations of spatial resolution, spectral information, and large imagery files usually hinder retrieving, managing, and analyzing remotely sensed data. The cloud-based computational capabilities of Google Earth Engine (GEE) provide the amenities for geospatial data analysis, retrieval, and processing with access to a majority of freely available, public, multi-temporal RS data. Integrating machine learning algorithms into GEE generates a promising path toward operationalizing automated RS-based IP monitoring by overcoming traditional challenges. Use of Classification and Regression Trees (CART) classifier to generate water-vegetation classification over six years (2016-2021) with Landsat 8 and Sentinel 2 images enabled mapping the invasive plants and their dominant component of Water Hyacinth (Pontederia crassipes) across a heterogeneous landscape in Bolgoda Lake, Sri Lanka. Also, the study could develop a relatively accurate classification of the water-vegetation dynamics over the time of interest. The classified time series data indicates the annual variation of the water, vegetation, and non-vegetation classes with rapidly fluctuating seasonal cycles for the vegetation cover. These results could benefit regulatory authorities and institutions to optimize environmental resource management and prioritize eco-preservation attempts. Moreover, the findings reflect the capabilities of deep learning models to identify invasive plant behaviors even with modest spatial and spectral resolution imagery.","PeriodicalId":153701,"journal":{"name":"Proceedings of International Symposium on Earth Resources Management & Environment 2022","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129263737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geochemical Distribution of Selected Elements in Serpentinite Deposit in Ginigalpelessa, Sri Lanka 斯里兰卡Ginigalpelessa蛇纹岩矿床中选定元素的地球化学分布

Proceedings of International Symposium on Earth Resources Management & Environment 2022 Pub Date : 2022-12-23 DOI: 10.31705/iserme.2022.6

Radp Dilshan, A. Sageenthan, Ngn Weerangana, H. Premasiri, Ratnayake Np, A. Abeysinghe, NP Dushyantha, NM Batapola, R.M.P. Dilshara

{"title":"Geochemical Distribution of Selected Elements in Serpentinite Deposit in Ginigalpelessa, Sri Lanka","authors":"Radp Dilshan, A. Sageenthan, Ngn Weerangana, H. Premasiri, Ratnayake Np, A. Abeysinghe, NP Dushyantha, NM Batapola, R.M.P. Dilshara","doi":"10.31705/iserme.2022.6","DOIUrl":"https://doi.org/10.31705/iserme.2022.6","url":null,"abstract":"Serpentinite deposits are well known for their natural enrichments of heavy metals (Ni, Cr, Co) and depletions of macro nutrients (Ca, Mg), which have caused different ecological and health impacts in the surrounding areas. In addition, they are considered as potential sources for rare earth elements (REEs). While Ginigalpelessa, the largest serpentinite deposit in Sri Lanka, has been the focus of several toxicological studies, to date, there have been no significant studies related to geochemical distribution of heavy metals, macro nutrients, and REEs in the deposit. Therefore, the present study is focused on the assessment of geochemical distribution of selected elements (Ni, Cr, Co, Ca, Mg, and REEs) in the deposit. Accordingly, concentrations of these elements in 30 rock and soil samples were analyzed and their geochemical distributions were studied using the results of the present study and literature. Ni (6629 ppm) and Cr (35875 ppm) showed the highest enrichments in the deposit, whereas all the studied heavy metals have exceeded the permissible levels of the World Health Organization. In addition, a low Ca/Mg ratio was observed in the deposit, which explains the inhibition of plant growth in the deposit. Moreover, the identified areas with high enrichments of Ni, Cr, and Co using the prepared geochemical distribution maps will be useful in the spot remediation for toxicity in the deposit. Since serpentine soil is recognized as a low-grade source for Ni, low-grade extraction techniques such as phytomining and bioleaching are recommended to extract valuable metals from the Ginigalpelessa deposit.","PeriodicalId":153701,"journal":{"name":"Proceedings of International Symposium on Earth Resources Management & Environment 2022","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127647319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potentials and Issues in Manufacturing Water-based Graphite Dispersions (-lubricants) in Sri Lanka as Value Added End Product of Natural Graphite 斯里兰卡生产水基石墨分散体(润滑剂)作为天然石墨的增值终端产品的潜力和问题

Proceedings of International Symposium on Earth Resources Management & Environment 2022 Pub Date : 2022-12-23 DOI: 10.31705/iserme.2022.12

E. Ekanayake

{"title":"Potentials and Issues in Manufacturing Water-based Graphite Dispersions (-lubricants) in Sri Lanka as Value Added End Product of Natural Graphite","authors":"E. Ekanayake","doi":"10.31705/iserme.2022.12","DOIUrl":"https://doi.org/10.31705/iserme.2022.12","url":null,"abstract":"Sri Lanka is the only country in the world known to extract and produce commercially viable quantities of natural crystalline vein graphite. Currently Bogala Graphite mines and Kahatagaha Graphite mines are famous underground mines and largest natural graphite producers which supply natural vein graphite in the form of various product categories to international graphite market. It is said to be raw graphite or Run-of-mine (ROM) taken from underground mine is subjected to certain value adding steps such as separation into carbon grades and milling and grinding to requested particle size before export. But still value addition of graphite is a hot topic in many technical forums as well as among politicians and civil society. As we know, graphite is a miracle material in the industrial world as it involves or becomes an invaluable material in many industrial products as well as applications. So, among many graphite applications or end products, water-based graphite dispersion (lubricant) which is known as hot forging lubricant is one typical value-added graphite end product which can be produced in Sri Lanka using its own raw material. On the other hand, even though hot forging industry is not available in Sri Lanka, we can focus on our neighboring countries in South Asia specially India and Pakistan where world largest forging factories located and manufactured almost all forged parts for global automotive industry. This paper discusses potentials and issues related to manufacturing water-based graphite dispersions (lubricants) in Sri Lanka. This is one value added graphite end product and formulated specially aiming hot forging industry.","PeriodicalId":153701,"journal":{"name":"Proceedings of International Symposium on Earth Resources Management & Environment 2022","volume":"624 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134483598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proceedings of International Symposium on Earth Resources Management &amp; Environment 2022最新文献

Proceedings of International Symposium on Earth Resources Management & Environment 2022最新文献