Research and development of solid sulfur ash-based foam lightweight soil material and mechanical properties research
In order to promote the resource utilization of solid sulfur ash,this paper proposes a method to stimulate the potential activity of solid sulfur ash by using chemical excitation and mechanical grinding together,compares the mechanical properties of solid sulfur ash-based foam lightweight soil before and after the modification,and verifies the feasibility of applying solid sulfur ash to foam lightweight soil materials through the characterization of solid sulfur ash.The results show that the solid sulfur ash slag has high content of SiO2 and Al2O3,which is potentially active,but the AFt produced by hydration makes the foam lightweight soil volume expansion.The use of 0.04%alkaline excitant and mechanical grinding for 120 min can effectively stimulate the potential activity of solid sulfur ash slag,and mechanical grinding can release the expansion energy in advance,to solve the problem of volume stability of the material.The mechanical properties of solid sulfur ash slag based foam lightweight soil improved significantly after modification,in order to meet the requirements for the application of solid sulfur ash slag in foam lightweight soil.Mechanical properties of modified solid sulfur ash-based foam lightweight soil improved significantly,in order to meet the requirements of compressive strength,softening coefficient and volume stability,should control the solid sulfur ash dosage is not higher than 62%of the mass of cement.The new material of solid sulfur ash-based foam lightweight soil developed in this paper provides a new way for the resourceful utilization of industrial solid waste and foam lightweight soil to reduce cost and increase efficiency.
foamed lightweight soilsolid sulfur ashactivation of reactivityunconfined compression strengthsoftening coefficient
NETL
NSTL
万方数据
