Study on Strength Change of Recycled Concrete with Age in a Natural Jungle Covered Buildings

Abstract

In order to lay a solid experimental and theoretical foundation for the application of recycled
concrete and structural engineering, it is necessary to strengthen the research on the
performance of recycled concrete. Forest evaporation and turbulent exchange intensity affect the
characteristics of soil and stone. The accelerated demolition and construction speed of various
projects leads to the accumulation of waste concrete. In this paper, the mix design and basic
mechanical properties of recycled concrete are studied. Based on the mix proportion design
method of ordinary concrete, this paper applies the calculation formula of additional water
consumption and replacement regression coefficient αa, αB, the mix proportion of recycled
concrete is designed. Based on the mix proportion of recycled concrete, the mix proportion
design of water reducer recycled concrete, fly ash recycled concrete, silica fume recycled
concrete and composite recycled concrete is discussed by adding admixtures and admixtures,
which provides a theoretical basis for the high performance of recycled concrete. Based on the
compressive strength test of 288 standard cubes, this paper discusses the failure mode and
process of recycled concrete. The compressive properties of high performance recycled concrete
and ordinary concrete are compared, and the influence of admixtures and admixtures on the
compressive strength of recycled concrete is discussed. In this paper, the splitting tensile
strength test, flexural strength test and elastic modulus test of recycled concrete are also carried
out. It is found that the above three properties of recycled concrete are decreased..