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Research and Application of Recycled Concrete Technology in prefabricated buildings

Research and Application of Materials Science 2024年第1期6卷 33-36页

作者： Shanshan DENG Gang SHI Chao SHANG Fuchuan ZHOU Masabo Gasper Masiko M.Kaziana Chongqing Telecommunication Polytechnic College Chongqing402247China Chongqing yuxi water conservancy and electric power survey and design institute CO. LTD.Chongqing402160China Chengde Thermal Power Engineering Installation Co. Ltd.Chengde067000China Chongqing Vocational Institute of Engineering Chongqing402260China Undergraduate Architecture and Civil Engineering Dar es Salaam Institute of Technology{DIT}Dar es Salaam11103Tanzania

The utilization of waste concrete as a raw material for recycled concrete in the domain of prefabricated components is garnering greater interest.This paper delineates and examines the concept,categorization,methodologies of preparation,applicable sectors,and evaluative metrics of recycled concrete technology,highlighting its prospective benefits.Nonetheless,for the successful integration of recycled concrete technology into prefabricated component applications,it is imperative to systematically enhance its physical,mechanical,and attributes,as well as its environmental efficacy.Moreover,to foster the continued advancement of recycled concrete technology,innovative initiatives,standardization,educational programs,demonstration projects,and collaborative efforts are crucial to promote broader adoption and realize improved outcomes within the realm of prefabricated components.In conclusion,recycled concrete technology is poised to play a pivotal role in prefabricated construction,offering robust support for propelling the construction industry towards a sustainable future.

关键词： recycled concrete prefabricated buildings Environmental performance assessment

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Application Strategy of BIM Technology in Virtual Construction of prefabricated buildings

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Journal of Architectural Research and Development 2022年第3期6卷 40-46页

作者： Xiaoyan Zhao Ligang Cao Henan Technical College of Construction Zhengzhou 450000China Henan University of Technology Design and Research Academy Zhengzhou 450000China

In order to improve the construction efficiency,save resources,reduce costs,and to protect the environment during the construction work,prefabricated buildings is an important process that is needed to be carried out during the construction.However,in the current situation,lack of knowledge related the prefabricated buildings,and irrationalities of the relevant staff,limits the practical application of the prefabricated buildings.Simulating construction through building information modeling(BIM),can fully simulate various situations that may occur in the construction process,and also can improve the quality and efficiency of the prefabricated building construction work,therefore,this paper analyzes the application strategy of BIM technology in the virtual construction of prefabricated buildings as a reference.

关键词： BIM technology prefabricated buildings Virtual construction

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Research on a Composite Biomass Insulation Material with Geopolymers as Binders and Forestry Waste as Fillers

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Journal of Thermal Science 2022年第2期31卷 590-605页

作者： LI Hongqiang ZOU Si LIU Tiantian WANG Shuang ZOU Jun ZHANG Xiaofeng LIU Lifang BAI Chengying ZHANG Guoqiang College of Civil Engineering Hunan UniversityChangsha 410082China National Center for International Research Collaboration in Building Safety and Environment(NCIRCBSE) Hunan UniversityChangsha 410082China Key Laboratory of Building Safety and Energy Efficiency of the Ministry of Education Hunan UniversityChangsha 410082China State Key Laboratory of Plant Physiology and Biochemistry China Agricultural UniversityBeijing 100193China College of Energy and Power Engineering Changsha University of Science and TechnologyChangsha 410114China College of Civil Engineering Hunan University of Science and TechnologyXiangtan 411201China Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China

A composite biomass insulation material,which uses geopolymers as adhesives and forestry waste as fillers,was proposed and experimentally tested.The orthogonal experimental method was adopted to analyze the optimum theoretical oxide molar ratios and the mass ratio of mixing water to binder(m_(w2)/m__(B))for preparing geopolymers.The influences of curing regimes(including one-stage and two-stage curing methods)and m_(w2)/m_(B) ratios of the insulation materials on mechanical,thermal,and hydraulic performances were also studied by experiment.The results indicated that the optimum combination scheme of preparing geopolymers was molar ratio x_(SiO_(2))/x_(Na_(2)O)=3.3,x_(SiO_(2))/x_(Al_(2)O_(3))=3.2 and m_(w2)/m_(B)=0.5 with the highest mechanical strength of 34.21 MPa.Besides,the best curing conditions of the composite material were the curing temperatures of 85°C and 70°C under the two-stage curing regime,which could achieve the low heat conductivity of 0.123 and 0.125 W/(m·K),and the high mechanical strength of 1.70 MPa and 1.71 MPa,respectively.The optimum m_(w2)/m_(B)ratios of the biomass material were 0.5 to 0.55 with heat conductivity of 0.114 to 0.125 W/(m·K).This novel composite insulation material has satisfying physical performances,which is helpful for achieving building energy conservation.

关键词： sawdust forestry waste energy conservation prefabricated buildings composite biomass insulation materials

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