新型水硬性磷铝酸盐水泥的研究进展

Research progress of new hydraulic phosphoaluminate cement

水硬性磷铝酸盐水泥是我国原创的一种新型水硬性水泥,其熟料主要矿物组成为磷铝酸钙、铝酸一钙和磷酸三钙。其中,磷铝酸钙是以材料设计为指导思想,设计、制备的具有优越水化性能的新化合物。依据熟料中各组成矿物的水化性能特征,通过调整磷铝酸钙、铝酸一钙和磷酸三钙的相对含量,使其相互配合,可获得满足不同性能需求的磷铝酸盐水泥。在原料中掺杂金属氧化物,可促进熟料煅烧过程中矿相的生成以及提高熟料的水化硬化性能。磷铝酸盐水泥具有高强早强、长期强度稳定发展、硬化体积稳定、优良的抗氯离子渗透、抗硫酸盐侵蚀以及抗碳化性能等,是一种高性能、多功能胶凝材料,可适用于复杂服役环境下的多种工程。

Hydraulic phosphoaluminate cement is a new hydraulic cement initially invented in China.The main mineral composition of hydraulic of phosphoaluminate cement clinker is calcium phosphoaluminate,calcium aluminate and tricalcium phosphate.Among them,calcium phosphoaluminate is a new compound with superior hydration performance designed and prepared based on the material design as the guiding ideology.According to the hydration performance characteristics of the constituent minerals in the clinker,by adjusting the relative contents of calcium phosphoaluminate,calcium aluminate,and tricalcium phosphate to match each other,phosphoaluminate cement that meets various performance requirements can be obtained.The doping of metal oxides in the raw materials can promote the formation of mineral phases during the clinker calcination process and improve the hydration and hardening properties of the clinker.Phosphoaluminate cement has high-strength and early-strength,stable long-term strength development,stable hardening volume,excellent resistance to chloride-ion and sulfate attack and carbonation resistance.It is a high-performance,multi-functional cementitious material that can be applied to various projects in unique environments.