摘要
采用化学滴定法研究了水胶比为0.4,不同矿渣掺量(0%、20%、40%)的水泥-磨细矿渣二元体系对Cl-结合能力的影响规律,用XRD、DSC和TG-DTG等现代测试方法综合分析了该二元体系对Cl-的结合特征及结合机理。结果表明:F盐在d=79 nm,出现第一强峰,345℃左右时出现明显的吸热峰;F盐的失重量依次是3.49%,3.91%,4.97%;矿渣对Cl-的结合与其比表面积和化学组成密切相关,比表面积越大,等效SO3含量越小,对Cl-的结合能力则越强。
The chloride binding capacity of hydrated cement paste,which the water/binderratio was 0.4,with 0%,20%,40% mass fraction of Groud Ggranulated Blast-furnace Slag（GGBS） is respectively investigated by chemical titration analysis in this paper.The mechanism of chloride binding in the cement-GGBS paste is quantitatively analyzed by X-Ray Diffractometry（XRD）,Differential Scanning Calorimetry （DSC）and Thermogravimetry-Differential Thermogravimetry（TG-DTG）.Results indicate that Friedel＇salt firstly appears strong intensity at d=79 nm in the Xray patters;the endothermic peak is about 350 ℃ in DSC patters and increase in areas of dehydration peak with increasing slag content,the loss of friedel＇salt is 3.49%,3.91%,4.97% respectively in TG-DTG patters of hydrated cement paste with 0%,20%,40% mass fraction of GGBS,respectively.The chloride binding capacity of slag is closely related to the specific surface area and chemical composition of it.The chloride binding capacity enhances with higher specific surface area and as well as lower sulfur trioxide content.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第7期39-43,共5页
Journal of Wuhan University of Technology
基金
交通部西部交通科技重点资助项目(2006ZB12)
