砂浆固化Cl^-性能的影响因素  

Influence Factors on Performance of Mortar Solidifying Chloride

作　　者：马昆林[1] 谢友均[1] 刘运华 石明霞[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075 [2]郴州市建设工程安全管理监督站,湖南郴州423000

出　　处：《建筑科学与工程学报》2007年第1期37-41,46,共6页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金项目(50678174);中南大学研究生教育创新工程基金项目(063710044)

摘　　要：采用化学滴定的方法,研究了单掺粉煤灰、单掺硅灰、粉煤灰与硅灰双掺以及龄期对砂浆固化Cl-性能的影响规律。结果表明:与基准砂浆相比,粉煤灰掺量增加,砂浆固化Cl-性能增强,特别是对Cl-的化学结合能力;在本试验范围内掺入硅灰对砂浆固化Cl-性能影响不显著;粉煤灰与硅灰双掺能够进一步提高砂浆固化Cl-性能;随着龄期的增加,砂浆对Cl-固化能力和化学结合能力均下降,物理吸附能力提高,但到一定龄期后,无论是化学结合量还是物理吸附量都趋于稳定。Influence rules of adding single fly ash, single silica fume, and compound of fly ash and silica fume as well as age on the performance of mortar solidifying chloride were studied through chemical titration method. The results show that by comparing with the blank sample, the performance of mortar solidifying chloride, especially its chemical binding capacity of chloride is strengthened by addition of fly ash. There is hardly influence on the performance of mortar solidifying chloride by the addition of silica fume in this experiment. Appropriate addition of compound of fly ash and silica fume can further improve the performance of mortar solidifying chloride. With age increasing, performance of total amount of mortar solidifying chloride and chemical binding capacity of chloride are on the decline, but the performance of chloride physical adsorption is on the rise. Both chemical binding and physical adsorption will be invariableness when age is definite.

关 键 词：混凝土耐久性 化学结合 物理吸附 Cl^- 砂浆 

分 类 号：TU528[建筑科学—建筑技术科学]