Application Of Green Recycled Lightweight Aggregate Concrete In Short-pier Shear Wall

The vigorous development of contemporary social economy has effectively promoted the rapid development of urban construction,the concept of green ecology has emerged with urban construction.This development has also accelerated the implementation and promotion of energy-saving building material innovation policy in China.This provides the development opportunity and research background for the development and application of green recycled lightweight aggregate concrete studied in this paper.Green regenerated lightweight aggregate concrete is a new type of green regenerated lightweight aggregate concrete,which is composed of ceramic and broken brick as the main aggregate in construction waste,and then reasonably uses HC-1 highperformance cementite material instead of existing cementite material.This new concrete can alleviate the carbon emissions caused by traditional concrete materials in the preparation or industrial production process,reduce the exploitation of natural sand and gravel,and effectively reduce construction waste.Therefore,it is of great significance to test the performance of the green recycled lightweight aggregate concrete and to study the seismic performance of the concrete components in the sustainable development of urban construction.This paper firstly introduces the material sources and material properties of various constituent materials of green recycled lightweight aggregate concrete(HC-1 cementite,sand,ceramsite,construction waste mainly composed of broken brick particles,concrete water,high-performance polycarboxylate water reducer),and with the strength index as the important basis and the influence on the workability,dry density and other indexes of green recycled light aggregate concrete as the standard,the optimal mix ratio of green recycled light aggregate concrete is determined.On this basis,the effects of different replacement rates of recycled aggregate on the physical and mechanical properties and durability of green recycled lightweight aggregate concrete were studied.Based on the above research on the optimal mix ratio and material performanceof green recycled lightweight aggregate concrete,this paper conducts the repeated cyclic loading test of 1 ordinary concrete short shear wall specimen and 5 recycled lightweight aggregate concrete short shear wall specimens.The failure process of all specimens in the test was described,and the failure characteristics were summarized and compared.Through sorting out the test data,hysteretic curves and skeleton curves of six short shear wall specimens under low cyclic loading were obtained.In addition,the bearing capacity,stiffness,ductility,energy dissipation and other properties of the new type concrete shear wall specimens under low cyclic loading are analyzed and studied.The above results show that the application of optimal mix ratio has a certain effect on improving the energy dissipation capacity of specimens.In conclusion,this paper provides a foundation for the research and identification of green recycled lightweight aggregate concrete as a new material,and also provides a certain reference basis for its design and practical application in short shear wall,laying a good foundation for its in-depth research in this field.