Concrete Based on Recycled Aggregates for Their Use in Construction: Case of Goma (DRC)  

作　　者：Masika Muhiwa Grâce Alinabiwe Nyamuhanga Ally Muhindo Wa Muhindo Abdias Kubuya Binwa Patient Muhatikani Trésor Manjia Marcelline Blanche Ngapgue Francois Masika Muhiwa Grâce;Alinabiwe Nyamuhanga Ally;Muhindo Wa Muhindo Abdias;Kubuya Binwa Patient;Muhatikani Trésor;Manjia Marcelline Blanche;Ngapgue Francois(Department of Civil Engineering, Faculty of Applied Sciences and Technologies, UniversitéLibre des Pays des GrandsLacs, Goma, Democratic Republic of Congo;Buildings and Publics Works Section, Institut du Batiment et des Travaux Publics, Butembo, Democratic Republic of Congo;Department of Civil Engineering, National Advanced School of Engineering, University of Yaoundé 1, Yaoundé, Cameroon;Department of Civil Engineering, Fotso Victor University Institute of Technology, University of Dschang, Bandjoun, Cameroon)

机构地区：[1]Department of Civil Engineering, Faculty of Applied Sciences and Technologies, UniversitéLibre des Pays des GrandsLacs, Goma, Democratic Republic of Congo [2]Buildings and Publics Works Section, Institut du Batiment et des Travaux Publics, Butembo, Democratic Republic of Congo [3]Department of Civil Engineering, National Advanced School of Engineering, University of Yaoundé 1, Yaoundé, Cameroon [4]Department of Civil Engineering, Fotso Victor University Institute of Technology, University of Dschang, Bandjoun, Cameroon

出　　处：《Open Journal of Civil Engineering》2020年第3期226-238,共13页土木工程期刊（英文）

摘　　要：The following study is aimed at valorizing an important part of waste from building demolition, particularly concrete as a source of aggregates for their usage in n<span style="font-family:Verdana;">ew hydraulic concrete formulation. The experimental study mainly consisted of physical characterization of natural and recycled aggregates respectively and the impact of the latter on some properties of the new formulated concrete, actually their respective consistencies for fresh concrete and mechanical strength for the hardened one. The outcome of the study shows that the recycled aggregates are m</span><span style="font-family:Verdana;">ore heterogeneous and have a high capacity of water absorption, but which still respects the current standards of concrete.</span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">The need for additional water has been observed for recycled aggregates-based concrete so as to have the same workability. About the compressive strength, mechanical properties obviously show that, at 28 days from setting up, concretes from recycled aggregates can reach compressive strengths range between 20 and 25 MPa</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">without any sophisticated technology. So, these results show that we can efficiently contribute to the protection of environment by valorizing waste from concrete-based building demolition on the one hand;and the preservation of natural reserve on the other. And both advantages contribute to sustainable development overall goals.</span></span></span>The following study is aimed at valorizing an important part of waste from building demolition, particularly concrete as a source of aggregates for their usage in n<span style="font-family:Verdana;">ew hydraulic concrete formulation. The experimental study mainly consisted of physical characterization of natural and recycled aggregates respectively and the impact of the latter on some properties of the new formulated concrete, actually their respective consistencies for fresh concrete and mechanical strength for the hardened one. The outcome of the study shows that the recycled aggregates are m</span><span style="font-family:Verdana;">ore heterogeneous and have a high capacity of water absorption, but which still respects the current standards of concrete.</span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">The need for additional water has been observed for recycled aggregates-based concrete so as to have the same workability. About the compressive strength, mechanical properties obviously show that, at 28 days from setting up, concretes from recycled aggregates can reach compressive strengths range between 20 and 25 MPa</span></span></span><span><span><span style="font-family:""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">without any sophisticated technology. So, these results show that we can efficiently contribute to the protection of environment by valorizing waste from concrete-based building demolition on the one hand;and the preservation of natural reserve on the other. And both advantages contribute to sustainable development overall goals.</span></span></span>

关 键 词：DEMOLITION RECYCLING Water Absorption CONCRETE Mechanic Resistance 

分 类 号：TU5[建筑科学—建筑技术科学]