Research On The Efficiency Of Waste Concrete Recycling Based On Life Cycle Assessment

With the continuous use and waste of resources and energy,non-renewable resources are decreasing day by day,the problem of global resource depletion is deteriorating,and the shortage of materials is slowly becoming an important factor restricting social and economic development.In the context of national energy saving and emission reduction,in order to achieve the goal of sustainable development,the utilization of solid waste resources has become a hot topic that is currently highly concerned by enterprises and all sectors of society.The industry has concentrated on breaking through the technical bottlenecks of solid waste resources utilization,but with technology The environmental impact assessment technology supporting R&D still needs to be improved.Therefore,this study conducts research on the evaluation of the effects of solid waste recycling,establishes a universal solid waste recycling effect evaluation model based on the life cycle assessment method,and scientifically identifies the implementation of solid waste recycling technology from the perspective of resources and the environment.Feasibility,effectively improve the efficiency of solid waste recycling and avoid secondary pollution in the recycling process.First of all,this study selects the mainstream LCA method system at home and abroad according to the needs of the evaluation of the effect of solid waste recycling,and determines 18 environmental impact indicators,three types of damage indicators and their corresponding evaluation models based on the Re Ci Pe method system.Realize the characterization,grouping,normalization and comprehensive evaluation of the resources and environmental data involved in solid waste recycling,and provide support for the scientific quantification of the environmental efficiency of solid waste recycling.Secondly,based on the full life cycle of the product,a set of universal evaluation models for the effects of solid waste recycling will be established.By comparing the environmental impact results of the original product produced without the addition of solid waste and the comprehensive index value of the environmental impact of the production of recycled products with the addition of solid waste,the resource waste efficiency improvement index is obtained to effectively evaluate the effect of the resource.At the same time,the evaluation of waste recycling technology and process can promote the quantitative analysis of waste recycling and provide a scientific basis for waste recycling,which has certain theoretical value and practical significance.Finally,this article takes a typical enterprise as the research object and takes the production of C40 concrete products from waste concrete as an example,and calculates its resource utilization rate improvement index to be 0.0612.The conclusion shows that on the premise of ensuring consistent product performance and meeting the standards,the resources of waste concrete The environmental efficiency improvement index K is 0.06084,which is judged according to the evaluation standard of the effect of solid waste recycling.From the perspective of improving environmental efficiency,waste concrete has a resource value,which also shows that the recycling of waste concrete is beneficial to the environment.Considering qualitatively,such as using construction waste to produce concrete can avoid the resource and environmental impact of construction waste disposal process,can reduce the consumption of natural minerals,etc.,based on quantitative analysis and qualitative conclusions are completely consistent,and can be quantified to specifically improve resource efficiency In the future,if there are resource-based technologies in the future,the model can be used to optimize the technology.