Study on hydration characteristics of solid waste based cementitious materials and effect of its content on mechanical properties of C30 concrete
Through particle size analysis,mechanical performance testing,XRD,SEM,and thermal analysis methods,the basic physical properties and hydration characteristics of solid waste based cementitious materials were investigated.On this basis,the influence of the content of solid waste based cementitious material on the mechanical properties of C30 concrete was investigated.The results show that particle size of solid waste based cementitious material is thinner than cement,and the hydration products are mainly AFt and C-S-H gel.When the amount of solid waste based cementitious material is 360～400kg/m3,the compressive strength of C30 concrete at 28d is 36.9～40.4MPa.The 28d compressive strength of C30 concrete is 43.7MPa,when the solid waste based cementitious material and cement are mixed and the cement content is 80kg/m3.When the solid waste based cementitious material is mixed with cement and fly ash,C30 concrete has a good 28d compressive strength guarantee rate.When the solid waste based cementitious material and fly ash are mixed together,the overall strength of C30 concrete is poor.
solid waste based cementitious materialhydration characteristicconcretemechanical propertysolid waste resource utilization
NETL
NSTL
万方数据
