摘要
沿海水泥混凝土工程长期受到腐蚀,很难达到预期服役寿命。本文分析其中的原因,希望采用水泥混凝土表面生长海洋生物的方法来抵抗腐蚀。研究羟基磷灰石、贝壳和碳酸钙对硅酸盐42.5R水泥和硫铝酸盐水泥抗硫酸盐侵蚀性能的影响。结果表明:硅酸盐水泥和硫铝酸盐水泥中掺入适量的羟基磷灰石、贝壳和碳酸钙时,其抗侵蚀系数有一定程度增加。当硫铝酸盐水泥中碳酸钙掺量为10%时,其抗侵蚀系数为1.16,硅酸盐水泥中碳酸钙掺量为15%时,其抗侵蚀系数达到1.34,抗硫酸盐侵蚀能力最强。硅酸盐水泥和硫铝酸盐水泥中掺入羟基磷灰石时,其水化放热量比掺碳酸钙和掺贝壳的水化放热量低,且在硅酸盐水泥中掺入混合材料后,水泥的水化放热量低于硅酸盐的水化放热量,这有利于提高水泥混凝土工程的耐久性。
Coastal cement concrete engineering has been eroded for a long time,and can＇t achieve their expected service lives.One solution was to just cultivate the ocean living beings on the surface of cement concrete engineering to resist the corrosion.The influences of hydroxyapatite,shell powder and calcium carbonate on the durability of 42.5R ordinary Portland cement and sulphoaluminate cement were investigated.The sulfate corrosion resistance coefficients of the cement would increase to some extent when appropriate content of hydroxyapatite,shell powder and calcium carbonate were added.When the content of calcium carbonate in the sulphoaluminate cement was 10%,the corrosion resistance coefficient was 1.16;and when the content of calcium carbonate in the ordinary Portland cement was 15%,the corrosion resistance coefficient reached 1.34,the performance of resistance to sulfate attack was best.When the hydroxyapatite was added into the ordinary Portland cement and the sulphoaluminate cement,the hydration heat was lower than that of the cement containing shell powder and calcium carbonate.When the hydroxyapatite,shell powder and calcium carbonate were added into the ordinary Portland cement,each hydration heat was lower than that of the ordinary Portland cement;this was helpful for the durability of the cement concrete engineering.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2011年第1期39-43,共5页
Bulletin of the Chinese Ceramic Society
基金
国家重点基础研究发展计划(973)项目(2010CB635117)
国家自然科学基金资助项目(51072070)
关键词
羟基磷灰石
贝壳
碳酸钙
抗侵蚀系数
水化热
hydroxyapatite
shell
calcium carbonate
corrosion resistance coefficient
hydration heat
