文献类型：期刊文献

中文题名：Ⅲ级粉煤灰与水泥浆体的微界面改性

英文题名：Modification of Micro-interface between Grade Ⅲ Fly Ash and Cement Paste

作者：陈登[1,2];高世明[1];张钰晖[1];王爱国[3];何智海[4]

机构：[1]苏州科技大学土木工程学院,江苏苏州215011;[2]长江科学院水利部水工程安全与病害防治工程技术研究中心,湖北武汉430010;[3]安徽建筑大学安徽省先进建筑材料重点实验室,安徽合肥230022;[4]绍兴文理学院土木工程学院,浙江绍兴312000

年份：2020

卷号：23

期号：2

起止页码：447

中文期刊名：建筑材料学报

外文期刊名：Journal of Building Materials

收录：CSTPCD、、EI(收录号：20202208743200)、北大核心2017、Scopus、CSCD2019_2020、北大核心、CSCD

基金：长江科学院开放研究基金资助项目(CKWV2019757/KY);国家自然科学基金资助项目(51778003);江苏省建设系统科技项目(2017ZD23);陕西省高性能混凝土工程实验室开放基金资助项目(SHPC201705)。

语种：中文

中文关键词：改性Ⅲ级粉煤灰;水化;微界面;力学性能

外文关键词：modified grade Ⅲ fly ash;hydration;micro-interface;mechanical property

中文摘要：采用电石渣对Ⅲ级粉煤灰进行高温煅烧改性,利用X射线衍射(XRD)、扫描电子显微镜(SEM)和纳米划痕仪对改性Ⅲ级粉煤灰的矿物组成和表面形貌进行表征,研究了改性Ⅲ级粉煤灰的水化性能,对比分析了未改性和改性Ⅲ级粉煤灰与水泥浆体的微界面形貌和力学性能.结果表明:改性Ⅲ级粉煤灰表面生成了水化活性较好的β-C2S,其水化生成的C-S-H凝胶改善了Ⅲ级粉煤灰颗粒与水泥浆体的微界面,减少了微界面区的孔隙,提高了微界面的力学性能.

外文摘要：The surface of grade Ⅲ fly ash was modified through calcination method by mixing carbide slag. The mineral composition and surface morphology of the modified grade Ⅲ fly ash were characterized by using X-ray diffraction(XRD), scanning electron microscopy(SEM) and nan-scratch technique, and the hydration property of the modified grade Ⅲ fly ash was analyzed. The morphology and mechanical properties of micro-interface between unmodified or modified grade Ⅲ fly ash were compared. The results show that the β-C2S phase is formed on the surface of the modified grade Ⅲ fly ash, hydration of the modified grade Ⅲ fly ash will generate C-S-H gel which improves the micro-interface microstructure between grade Ⅲ fly ash and cement paste, the porosity of micro-interface of blended cement paste is decreased, and the mechanical properties of micro-interface of blended cement paste is improved.