Substitution of Aggregates in Concrete and Mortar with Coltan Mining Waste: Mechanical, Environmental, and Economic Impact Case Study  

作　　者：Alinabiwe Nyamuhanga Ally Élodie Ruffine Zang Masika Muhiwa Grâce Manjia Marcelline Blanche Ursula Joyce Merveilles Pettang Nana Ngapgue François Bella Nabil Chrispin Pettang Alinabiwe Nyamuhanga Ally;Élodie Ruffine Zang;Masika Muhiwa Grâce;Manjia Marcelline Blanche;Ursula Joyce Merveilles Pettang Nana;Ngapgue François;Bella Nabil;Chrispin Pettang(Laboratory Engineering Civil and Mechanics, Doctoral Research Unit for Engineering and Applications, University of Yaoundé, I, Yaoundé, Cameroon;Department of Civil Engineering, Faculty of Applied Sciences and Technologies, Free University of Great Lakes Countries (ULPGL), Goma, DRC;Department of Civil Engineering, National Advanced School of Engineering of Yaoundé, University of Yaoundé I, Yaoundé, Cameroon;Department of Civil Engineering, Fotso Victor University Institute of Technology, University of Dschang, Bandjoun, Cameroon;FIMAS Laboratory, Faculty of Technologies, Tahri Mohamed University, Bechar, Algeria)

机构地区：[1]Laboratory Engineering Civil and Mechanics, Doctoral Research Unit for Engineering and Applications, University of Yaoundé, I, Yaoundé, Cameroon [2]Department of Civil Engineering, Faculty of Applied Sciences and Technologies, Free University of Great Lakes Countries (ULPGL), Goma, DRC [3]Department of Civil Engineering, National Advanced School of Engineering of Yaoundé, University of Yaoundé I, Yaoundé, Cameroon [4]Department of Civil Engineering, Fotso Victor University Institute of Technology, University of Dschang, Bandjoun, Cameroon [5]FIMAS Laboratory, Faculty of Technologies, Tahri Mohamed University, Bechar, Algeria

出　　处：《Journal of Minerals and Materials Characterization and Engineering》2024年第2期139-163,共25页矿物质和材料特性和工程（英文）

摘　　要：The mining process involves drilling and excavation, resulting in the production of waste rock and tailings. The waste materials are then removed and stored in designated areas. This study aims to evaluate the mechanical strength and the environmental and economic impact of using Coltan Mining Waste (CMW) as a substitute for aggregates in concrete and mortar production. To achieve this, the CMW needs to be characterised. The Dreux Gorisse method was primarily used to produce concrete with a strength of 20 MPa at 28 days. The mortars, on the other hand, were formulated according to the NF P 18-452 standard. The environmental impact of using CMW as substitutes for natural aggregates in the production of concrete and mortar was analysed using SimaPro software. The results showed that mortars and concrete made with CMW have comparable compressive strengths to the reference mortar and concrete;reduce the negative impact on ecosystem quality, human health, resources, and climate change. It has also been shown that the substitution of aggregates by CMW reduces the cost of concrete and mortar as a function of the distance from the aggregate footprint.The mining process involves drilling and excavation, resulting in the production of waste rock and tailings. The waste materials are then removed and stored in designated areas. This study aims to evaluate the mechanical strength and the environmental and economic impact of using Coltan Mining Waste (CMW) as a substitute for aggregates in concrete and mortar production. To achieve this, the CMW needs to be characterised. The Dreux Gorisse method was primarily used to produce concrete with a strength of 20 MPa at 28 days. The mortars, on the other hand, were formulated according to the NF P 18-452 standard. The environmental impact of using CMW as substitutes for natural aggregates in the production of concrete and mortar was analysed using SimaPro software. The results showed that mortars and concrete made with CMW have comparable compressive strengths to the reference mortar and concrete;reduce the negative impact on ecosystem quality, human health, resources, and climate change. It has also been shown that the substitution of aggregates by CMW reduces the cost of concrete and mortar as a function of the distance from the aggregate footprint.

关 键 词：AGGREGATE Coltan Mining Waste CONCRETE MORTAR Mechanical Strength Life Cycle Analysis 

分 类 号：TU5[建筑科学—建筑技术科学]