超高强应变硬化水泥基复合材料制备及性能提升研究

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (3): 785-801.

• 水泥混凝土 • 下一篇

超高强应变硬化水泥基复合材料制备及性能提升研究

赵健¹, 杨鼎宜^1,2, 陆世敏¹, 杨凯璐¹, 毛翔¹, 陈龙祥¹, 王彤章¹

1.扬州大学建筑科学与工程学院,扬州 225127;
2.扬州大学绿色建筑材料研究所,扬州 225127

收稿日期:2024-09-23 修订日期:2024-12-11 出版日期:2025-03-15 发布日期:2025-04-01
通信作者: 杨鼎宜,博士,教授。E-mail:ydy1991@163.com
作者简介:赵健(1999—),男,硕士研究生。主要从事应变硬化水泥基复合材料方面的研究。E-mail1932564721@qq.com
基金资助:
国家自然科学基金(52478280);江苏省重点研发计划(社会发展)项目(BE2022776)

Preparation and Performance Improvement of Ultra-High Strength Strain Hardening Cement-Based Composite

ZHAO Jian¹, YANG Dingyi^1,2, LU Shimin¹, YANG Kailu¹, MAO Xiang¹, CHEN Longxiang¹, WANG Tongzhang¹

1. College of Architectural Science and Engineering, Yangzhou University, Yangzhou 225127, China;
2. Research Institute of Green Building Materials, Yangzhou University, Yangzhou 225127, China

Received:2024-09-23 Revised:2024-12-11 Published:2025-03-15 Online:2025-04-01

摘要/Abstract

摘要： 混凝土强度增加时,延展性会降低,此时混凝土表面易产生裂缝并影响耐久性,因此研究超高强超高韧性水泥基复合材料具有重要意义。本研究通过将超高强混凝土与应变硬化水泥基复合材料设计理论相结合,使用聚乙烯(PE)纤维作为增强材料制备超高强应变硬化水泥基复合材料(UHP-SHCC)。通过层次分析法-基于指标相关性的权重确定方法(AHP-CRITIC)混合加权法对UHP-SHCC的力学性能进行综合评价,得出最佳配合比:硅灰质量掺量为25%,矿粉质量掺量为20%,砂胶比为0.1,PE纤维体积掺量为2.00%,水胶比为0.18。进一步采用波纹型钢纤维、端钩型钢纤维与PE纤维混掺,探究PE纤维与钢纤维的协同效应。研究发现,掺入钢纤维能够大幅度提高UHP-SHCC的初裂抗拉强度,同时在PE纤维失效后钢纤维能够更好地发挥桥联作用,延缓UHP-SHCC试件的破坏,增加UHP-SHCC的极限拉伸应变同时减小裂缝的宽度。

关键词: 超高强, 超高韧性, 应变硬化, PE纤维, 钢纤维, 正交试验

Abstract: As the strength of concrete increases, its ductility decreases, making it more prone to cracking and adversely affecting durability. Therefore, the study of ultra-high strength, ultra-high toughness cement-based composite holds significant importance. This study combined the design principles of ultra-high-strength concrete and strain-hardening cement-based composites, using polyethylene (PE) fibers as reinforcing materials to develop ultra-high strength strain hardening cement-based composite (UHP-SHCC). The mechanical properties of UHP-SHCC were comprehensively evaluated using the analytic hierarchy process-criteria importance through intercriteria correlation (AHP-CRITIC) hybrid weighting method, resulting in an optimized mix design with the following proportions: 25% (mass fraction) silica fume, 20% (mass fraction) mineral powder, a sand binder ratio of 0.1, 2.00% (volume fraction) PE fiber, and a water binder ratio of 0.18. Additionally, corrugated steel fibers and hooked-end steel fibers were combined with PE fibers to explore the synergistic effects of the two types of fibers. The results indicate that the inclusion of steel fibers significantly enhances the initial cracking tensile strength of UHP-SHCC. Furthermore, after the failure of PE fibers, steel fibers effectively provide bridging action, delaying specimen failure, increasing the ultimate tensile strain, and reducing crack width in UHP-SHCC.

Key words: ultra-high strength, ultra-high toughness, strain hardening, PE fiber, steel fiber, orthogonal experiment

中图分类号:

TU528

赵健, 杨鼎宜, 陆世敏, 杨凯璐, 毛翔, 陈龙祥, 王彤章. 超高强应变硬化水泥基复合材料制备及性能提升研究[J]. 硅酸盐通报, 2025, 44(3): 785-801.

ZHAO Jian, YANG Dingyi, LU Shimin, YANG Kailu, MAO Xiang, CHEN Longxiang, WANG Tongzhang. Preparation and Performance Improvement of Ultra-High Strength Strain Hardening Cement-Based Composite[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(3): 785-801.

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超高强应变硬化水泥基复合材料制备及性能提升研究

Preparation and Performance Improvement of Ultra-High Strength Strain Hardening Cement-Based Composite

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