Effect of steam-curing regime on strength and chloride ion permeability of the concrete containing phosphorus slag powber
Concrete with two strength grades was prepared.The influence of steam-curing temperature and time on demoulding strength,strength development and chloride ion permeability of the concrete containing phosphorus slag powder were investigated.In addition,the non-evaporable water content of hardened paste was tested at demoulding age.The results shows that the demoulding strength of concrete and non-evaporable water content of hardened paste decrease with the phosphorus slag powder.Both extending steam-curing time and elevating steam-cuing temperature can increase the demoulding strength of concrete containing phosphorus slag powder and the non-evaporable water content of composite hardened binder containing phosphorus slag powder.However,elevating steam-cuing temperature has adverse effect on the strength development and chloride ion penetration resistance of concrete containing phosphorus slag powder.While the concrete containing phosphorus slag powder can obtain satisfactory compressive strength and chloride ion penetration resistance with extending steam-curing time.
phosphorus slag powdersteam curingdemoulding strengthchloride ion permeability
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