[1]李 磊,徐培蓁,朱亚光,等.强化后再生粗骨料混凝土单轴受压本构关系[J].西安建筑科技大学学报(自然科学版),2020,52(05):715-724.[doi:10.15986j.1006-7930.2020.05.014 ]
　LI Lei,XU Peizhen,ZHU Yaguang,et al.Constitutive relationship of strengthened recycled coarse aggregate concrete under uniaxial compression[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(05):715-724.[doi:10.15986j.1006-7930.2020.05.014 ]
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强化后再生粗骨料混凝土单轴受压本构关系()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
52
期数:
2020年05期
页码:
715-724
栏目:
出版日期:
2020-10-28

文章信息/Info

Title:
Constitutive relationship of strengthened recycled coarse aggregate concrete under uniaxial compression
文章编号:
1006-7930(2020)05-0717-08
作者:
李 磊1; 徐培蓁1; 朱亚光1; 闫洪生2; 李会文1
(1. 青岛理工大学 土木工程学院,山东 青岛 266033; 2. 青岛鼎新恩同绿色建材科技有限公司,山东 青岛 266000)
Author(s):
LI Lei1;  XU Peizhen1;  ZHU Yaguang1;  YAN Hongsheng2;  LI Huiwen1
(1. Department of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China;
关键词:
再生粗骨料;  纳米SiO2;  颗粒整形;  抗压强度;  本构关系
Keywords:
recycled coarse aggregate;  nano-SiO2;  particle shaping;  compressive strength;  constitutive relationship
分类号:
TU528
DOI:
10.15986j.1006-7930.2020.05.014
文献标志码:
A
摘要:
再生粗骨料混凝土应力 - 应变本构关系是再生粗骨料混凝土结构承载力计算和抗震设计重要问题之一,对再生粗骨料混凝土在结构中的应用至关重要.采用纳米SiO2浸泡和颗粒整形技术对再生粗骨料进行强化处理后,制备水胶比为0.5的再生粗骨料混凝土,通过立方体及棱柱体抗压强度试验,分析了不同取代率对再生粗骨料混凝土力学性能的影响.结果表明:强化后再生粗骨料混凝土的泊松比及应力 - 应变全曲线与天然混凝土相似; 强化后再生粗骨料混凝土的抗压强度、弹性模量和峰值应力得到明显增强,但仍低于天然混凝土; 颗粒整形法整体效果优于纳米SiO2浸泡法; 提出了强化后再生粗骨料混凝土的分段式本构关系方程,拟合曲线与应力 - 应变全曲线吻合较好.
Abstract:
The stress-strain constitutive relation of recycled coarse aggregate concrete is one of the important problems in bearing capacity calculation and seismic design of recycled coarse aggregate concrete structure, which is critical to the application of recycled coarse aggregate concrete in the structure. The recycled coarse aggregate concrete with water-binder ratio of 0.5 was prepared by using nano-SiO2 soaking and particle shaping technology to improve the properties of recycled coarse aggregate. The test research of cubic compressive strength and prismatic compressive strength were carried out, and the effects of different replacement rates on the mechanical properties of recycled coarse aggregate concrete were analyzed. Experimental results indicate that the poisson ratio and the stress-strain curve of enhanced recycled coarse aggregate concrete are similar to that of natural aggregate concrete. The compressive strength, elastic modulus and peak stress of enhanced recycled coarse aggregate concrete are obviously enhanced, but still lower than that of natural aggregate concrete. The overall effect of particle shaping method is better than that of nano-SiO2 immersion method. The piecewise constitutive relation equations of recycled coarse aggregate concrete after strengthening are presented. The simulative results agree well with the stress-strain curves ones.

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相似文献/References:

[1]白国良,张锋剑,安昱峄,等.再生混凝土承重砌块试验研究[J].西安建筑科技大学学报(自然科学版),2011,43(01):7.[doi:DOI:10.15986/j.1006-7930.2011.01.017]
　BAI Guo-liang,ZHANG Feng-jian,AN Yu-yi,et al.GB/T15229-2002 Light aggregate concrete small hollow block[S]. Beijing: Standards Press of China, 1997.The research of recycled rearing concrete hollow blocks[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2011,43(05):7.[doi:DOI:10.15986/j.1006-7930.2011.01.017]

备注/Memo

备注/Memo:
收稿日期:2020-04-17 修改稿日期:2020-09-16
基金项目:国家自然科学基金面上项目(51578342)
第一作者:李 磊(1995-),男,硕士生,研究方向为建筑废弃物资源化利用.E-mail: 847053436@qq.com 通信作者:徐培蓁(1974-),女,博士,教授,主要从事结构抗震、工程振动控制及建筑废弃物资源化利用等科研工作.E-mail: xpzzyg1@163.com

更新日期/Last Update: 1900-01-01