Effect of Ultrafine Phosphorus Slag on Concrete Performance and Its Internal Mechanism
TANG Guowang
LI Jianhua
DENG Qiang
ZHAO Zhongjun
YUAN Huikai
Abstract：The effect of ultrafine phosphorus slag powder on the performance of concrete was discussed and its internal mechanism was analyzed from a microscopic point of view.The results show that ultrafine phosphorus slag has a significant retarding effect and lower early compressive strength,then the compressive strength and resistance to chloride penetration of the concrete are both enhanced at 28 d.This is because the ultrafine phosphorus slag,through grinding treatment,increases the pozzolanic activity and improves the physical filling effect,leading to a denser microstructure in the hardened paste.This phenomena indicates that ultrafine phosphorus slag is suitable for concrete projects that require special retarding or high resistance to chloride penetration,helping to reduce cement usage and decrease CO2 emissions,and shows promising application prospects.
Keywords：phosphorus slagultrafine powdercement hydrationmechanical propertyresistance to chloride penetrationpore distribution
Publication Date：2025-08-30
Online Publishing Date：2025-09-05(First online date of this platform, not the publication date of the document)
Pages：7( 767-773 )