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[1]吴瑞雪,张 鹏,赵铁军,等.活性再生粉纤维增强应变硬化水泥基材料弯曲及拉伸韧性[J].建筑科学与工程学报,2022,39(06):34-42.[doi:10.19815/j.jace.2021.07001]
　WU Rui-xue,ZHANG Peng,ZHAO Tie-jun,et al.Bending and Tensile Toughness of Fiber-reinforced Cementitious Composites with Reactivity Recycled Powder[J].Journal of Architecture and Civil Engineering,2022,39(06):34-42.[doi:10.19815/j.jace.2021.07001]
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活性再生粉纤维增强应变硬化水泥基材料弯曲及拉伸韧性(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
39卷
期数:
2022年06期
页码:
34-42
栏目:
建筑材料
出版日期:
2022-11-30

文章信息/Info

Title:
Bending and Tensile Toughness of Fiber-reinforced Cementitious Composites with Reactivity Recycled Powder
文章编号:
1673-2049(2022)06-0034-09
作者:
吴瑞雪,张 鹏,赵铁军,郭得阳
(青岛理工大学 土木工程学院,山东 青岛 266033)
Author(s):
WU Rui-xue, ZHANG Peng, ZHAO Tie-jun, GUO De-yang
(School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, Shandong, China)
关键词:
再生粉;  建筑垃圾;  纤维增强水泥基复合材料;  弯曲韧性;  拉伸韧性;  应变硬化
Keywords:
recycled powder;  construction waste;  fiber-reinforced cementitious composite;  bending toughness;  tensile toughness;  strain hardening
分类号:
TU525.9
DOI:
10.19815/j.jace.2021.07001
文献标志码:
A
摘要:
通过扫描电子显微镜对再生粉的微观结构进行观测; 利用X射线荧光和X射线衍射,对再生粉体及制备的水泥基材料的矿物组成和水化产物进行了测定; 通过弯曲试验和单轴拉伸试验对再生粉体制备纤维增强应变硬化水泥基材料(FRCC)的力学性能进行了研究。结果表明:再生微粉以钙硅质氧化物和化合物为主,具有火山灰活性,可以增强其与基体间的二次水化反应,掺入再生粉体可有效提高FRCC的拉伸和弯曲强度; 再生粉体-FRCC弯曲韧性随着纤维掺量的增加而提高,当纤维掺量(质量分数)达到2%时,FRCC具有典型的应变硬化特征; 利用再生粉体等质量替代粉煤灰时,FRCC的极限应变有所降低,而极限荷载有较大程度提高,提高幅度均达到10%以上,且再生砂浆粉(RMP)、再生砖粉(RBP)比再生混凝土粉(RCP)制备的FRCC具有更好的应变硬化性能; 验证了在满足材料韧性要求的情况下,利用再生粉制备应变硬化水泥基材料的可行性,对再生微粉在实际工程材料中的应用提供了参考。
Abstract:
The micro-structures of recycled powder were measured by scanning electron microscope, and the mineral composition and hydration products of recycled powder and its newmade cement-based materials were further determined by X ray fluorescence and X ray diffraction. The mechanical properties of fiber-reinforced cementitious composites(FRCC)with recycled powder were studied by bending and uniaxial tensile tests. The results show that recycled powder mainly contains calcium-silicon oxides and compounds, thereby possessing pozzolanic activity and promoting a secondary hydration in new cement-based materials. The incorporated recycled powder can effectively improve the tensile and bending strength of FRCC. The bending ductility of FRCC with recycled powder increases with the increase of fiber content, and an obvious strain-hardening characteristic occurs when the fiber content is 2%. FRCC has relative low ultimate strain and high ultimate load when fly ash is replaced by recycled powder in FRCC, and the increasing range all exceed 10%. In addition, the strain-hardening characteristic of FRCC including RMP and RBP is better than that of FRCC including RCP. The feasibility of recycled powder to prepare FRCC is verified when its toughness meets requirements, which provides a reference for the application of recycled powder in practical engineering materials.

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相似文献/References:

[1]王莲伟,魏志清.西安市建筑垃圾现状分析及再利用措施[J].建筑科学与工程学报,2007,24(03):91.
　WANG Lian-wei,WEI Zhi-qing.Present Condition Analysis and Reutilization Measures on Construction Waste of Xi'an[J].Journal of Architecture and Civil Engineering,2007,24(06):91.
[2]吴瑞雪,赵铁军,郭得阳.再生砂浆粉纤维增强水泥基复合材料拉伸及开裂性能研究[J].建筑科学与工程学报,2023,40(04):24.[doi:10.19815/j.jace.2021.08037]
　WU Ruixue,ZHAO Tiejun,GUO Deyang.Study on tensile and crack properties of fiber-reinforced cementitious composites with recycled mortar powder[J].Journal of Architecture and Civil Engineering,2023,40(06):24.[doi:10.19815/j.jace.2021.08037]

备注/Memo

备注/Memo:
收稿日期:2021-07-03
基金项目:国家自然科学基金-山东联合基金项目(U1706222)
作者简介:吴瑞雪(1987-),女,山东荷泽人,工学博士研究生,E-mail:13506399194@126.com。
更新日期/Last Update: 2022-12-20