| Ⅲ级粉煤灰与水泥浆体的微界面改性 |
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| 引用本文： | 陈登,高世明,张钰晖,王爱国,何智海.Ⅲ级粉煤灰与水泥浆体的微界面改性[J].建筑材料学报,2020,23(2):447-453. |
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| 作者姓名： | 陈登 高世明 张钰晖 王爱国 何智海 |
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| 作者单位： | 苏州科技大学土木工程学院,江苏苏州215011;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;苏州科技大学土木工程学院,江苏苏州215011;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;绍兴文理学院土木工程学院,浙江绍兴312000 |
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| 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) |
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| 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.
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| 关 键 词： | 改性Ⅲ级粉煤灰 水化 微界面 力学性能 |
| 收稿时间： | 2018/11/12 0:00:00 |
| 修稿时间： | 2019/1/10 0:00:00 |
Modification of Micro-interface between Grade Ⅲ Fly Ash and Cement Paste |
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| CHEN Deng,GAO Shiming,ZHANG Yuhui,WANG Aiguo and HE Zhihai.Modification of Micro-interface between Grade Ⅲ Fly Ash and Cement Paste[J].Journal of Building Materials,2020,23(2):447-453. |
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| Authors: | CHEN Deng GAO Shiming ZHANG Yuhui WANG Aiguo and HE Zhihai |
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| Affiliation: | School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China,School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China,School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China,Anhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University, Hefei 230022, China and College of Civil Engineering, Shaoxing University, Shaoxing 312000, China |
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| Abstract: | 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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| Keywords: | modified grade Ⅲ fly ash hydration micro-interface mechanical property |
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