磷铝酸盐胶凝材料的净浆强度与水化形貌  

Paste strength and hydrates morphology of phosphoaluminate cement

作　　者：丁铸[1] 王晓东[1,2] 张宁[3] 刘飚[3] 

机构地区：[1]深圳大学土木工程学院,广东省滨海土木工程耐久性重点实验室,广东深圳518060 [2]代尔夫特理工大学土木工程与地球科学学院,荷兰代尔夫特2628CN [3]济南大学材料科学与工程学院,山东济南250022

出　　处：《电子显微学报》2015年第6期453-458,共6页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金面上项目(No.51172146;No.51472163)

摘　　要：在实验室制备出磷铝酸盐水泥熟料,并用微观测试技术测定其矿物组成,研究了其抗压强度在水化1~90 d的发展,分析了其水化产物的形貌和元素分布。研究结果表明,所制得的熟料所含的矿物为磷铝酸钙、铝酸一钙、α-磷酸三钙以及玻璃相。该材料的净浆具有非常高的早期抗压强度,强度能够持续增长。7 d之前强度发展迅速,之后则发展较为平缓。根据对其水化产物的微观分析,发现熟料中不同矿物的水化活性不同,其水化速度相差较大。水化产物中主要含有水化铝酸钙,Ca O-Al2O3-H2O凝胶（C-A-H凝胶）、Ca O-Al2O3-P2O5-H2O凝胶（C-A-P-H凝胶）,各种形态的C-A-H凝胶中Al元素和Ca元素的原子数比例不同。Phosphoaluminate cement （PAC） clinker was prepared in laboratory. The mineral composition of PAC clinker was analyzed, and the compressive strength of hardened PAC clinker paste from 1 d to 90 d was measured and the hydrates morphology of PAC was also analyzed. The results show that the minerals in PAC clinker are calcium phosphoaluminate, calcium aluminate, α- tricalcium phosphate and glass phase. PAC can gain very high compressive strength in 7 day hydration, but the strength increasess lowly subsequently. According to the microcosmic analysis of the hydration products, different minerals have different hydration rates. The hydration products consist of hydrated calcium aluminate, CaO-Al2O3 -H2O gel （C-A-H gel） , and CaO-Al2O3-P2O5-H2O gel （C- A-P-H gel）. The atomic number ratios of Al to Ca in various forms of C-A-H gel are differenL

关 键 词：磷铝酸盐水泥 强度 微观形貌 胶凝材料 

分 类 号：TQ427.26[化学工程]