高延性水泥基复合材料抗压强度尺寸效应的正交试验研究

邓明科; 常云涛; 梁兴文; 王晶

doi:10.13204/j.gyjz201307019

高延性水泥基复合材料抗压强度尺寸效应的正交试验研究

doi: 10.13204/j.gyjz201307019

1.
西安建筑科技大学土木工程学院,西安710055

基金项目:

国家自然科学基金项目(50908187,51078305);长江学者和创新团队发展计划资助项目

详细信息

作者简介:
第一作者：邓明科, 男, 1979年出生, 副教授, 博士(后), 硕士生导师。电子信箱：dengmingke@126.com

中图分类号: TU528
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- 文章访问数: 170
- HTML全文浏览量: 11
- PDF下载量: 133
- 被引次数: 0
出版历程
- 收稿日期: 2012-09-26
- 刊出日期: 2013-07-20

ORTHOGONAL TEST RESEARCH ON COMPRESSIVE STRENGTH SIZE EFFECT OF ENGINEERED CEMENTITIOUS COMPISITES

1.
College of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China

摘要

摘要: 高延性水泥基复合材料(ECC)具有准应变硬化和多裂缝开展的性能，能够明显改善混凝土结构的抗震性能和耐久性。通过对32组192个试件进行抗压强度正交试验，研究ECC材料的立方体受压破坏过程，研究水胶比、纤维掺量、粉煤灰掺量和砂胶比4种因素对ECC立方体抗压强度尺寸效应的影响。试验结果表明：聚乙烯醇PVA纤维掺量增大，ECC抗压韧性明显提高；水胶比和纤维掺量是影响ECC抗压强度和尺寸效应的主要因素；水胶比增大，ECC抗压强度降低，尺寸效应系数增大；纤维掺量增大，试块抗压强度增大，尺寸效应系数增大。抗折试验表明，随着纤维掺量的增加，ECC材料的抗折强度显著提高。
- 高延性水泥基复合材料 /
- 正交试验 /
- 抗压强度 /
- 尺寸效应
Abstract: Engineered cementitious composite(ECC) can significantly improve the seismic performance and durability of concrete structures, which has pseudo strain hardening and multiple cracking performances.Through 32 groups of 192 specimens for doing orthogonal test of compressive strength of ECC, it was studied the cube compression failure process, and further research on water-binder ratio, fiber content by volume, fly ash content and sand-binder ratio on the size effect of ECC cube compressive strength.The test results show that as PVA fiber content increases, ECC compressive toughness is improved obviously;water-binder ratio and fiber content are the main factors which affect the ECC compressive strength and size effect.When water-binder ratio increases, the compressive strength of ECC materials decreases and size effect coefficient increases.Fiber content increases, the compressive strength of test block increases and the size effect coefficient increases.The bending tests show that the fiber content by volume increases, the ECC flexural strength of the composite increases obviously.
- engineered cementitious composite( ECC) /
- orthogonal test /
- compressive strength /
- size effect

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参考文献(17)

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