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Ⅲ级粉煤灰与水泥浆体的微界面改性
Modification of Micro interface between Grade Ⅲ Fly Ash and Cement Paste
投稿时间:2018-11-12  修订日期:2019-01-10
DOI:103969/j.issn1007 9629202002030
中文关键词:  改性Ⅲ级粉煤灰  水化  微界面  力学性能
英文关键词:modified grade Ⅲ fly ash  hydration  micro interface  mechanical property
基金项目: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)
              
作者单位
陈登
CHEN Deng
苏州科技大学土木工程学院,江苏苏州215011
School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China
高世明
GAO Shiming
苏州科技大学土木工程学院,江苏苏州215011
School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China
张钰晖
ZHANG Yuhui
苏州科技大学土木工程学院,江苏苏州215011
School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China
王爱国
WANG Aiguo
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
Anhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University, Hefei 230022, China
何智海
HE Zhihai
绍兴文理学院土木工程学院,浙江绍兴312000
College of Civil Engineering, Shaoxing University, Shaoxing 312000, China
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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.
英文摘要:
      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.
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