The Study And Application Of Recycled Coarse Aggregate Concrete Apply To ECO Highway Protection Material

With the development of resources and infrastructure construction rapidly,a large number of slopes are exposed with construction excavation.The side slope is destroyed easily under weathering and erosion effect,it poses a serious threat to the ecological environment and traffic safety.During the process of city construction,the demolition of old buildings resulted in large amounts of construction waste.If the construction waste cannot be reasonably utilized,it will cause waste of resources and environmental damage.In this paper,making recycled aggregate concrete with planting capacity by using recycled coarse aggregate made from construction waste,used for ecological retaining wall and ecological slope protection,the recycled aggregate concrete can bring the function of structure,and at the same time reflect the concept of environmental protection.This paper focuses on the characteristics of recycled aggregate with large porosity and high water absorption,and research on gradation of recycled coarse aggregate skeleton-void for recycled aggregate pervious concrete.The design method of mix proportion of recycled aggregate pervious concrete is put forward.Combined with the mechanical characteristics of recycled aggregate concrete permeable gravity retaining wall and the influence factors of environment,and study on the work of recycled aggregate pervious concrete,including mechanics,permeability,frost resistance and scour resistance,discussed on the feasibility and applicable condition of recycled aggregate pervious concrete as gravity retaining wall material.Through experimental study on retaining wall structure model,in order to study the law of soil pressure effect,the mixing ratio,forming and curing technology of recycled aggregate concrete permeable slope brick are put forward.Using retaining wall model and construction scene of revetment brick.The vegetation test is carried out and its ecological effects were evaluated.The final test results shows that the design method of skeleton-Void Gradation of recycled coarse aggregate by the calculated trial method and Bailey method is feasible,and get the best suitable gradation range.The mixture ratio design of C20 recycledaggregate pervious concrete was carried out by volume filling method and it has a good overall performance.Structural model test of ecological gravity retaining wall based on recycled aggregate pervious concrete get the rule of soil pressure curve.The anti sliding and anti overturning stability to meet the technical requirements of highway retaining wall.Making shielding-slope brick of recycled aggregate pervious concrete,The production technology of shielding-slope brick of Recycled aggregate pervious concrete is put forward,its technical specifications meet the corresponding technical requirements.Planting the seeds in the recycled aggregate pervious concrete ecological retaining wall and shielding-slope construction scene,and get the good ecological effect.Because of low cost of recycled aggregate concrete and environmental protection,it is achieved good social and economic benefits.