[1]范玉辉,肖建庄,曹明.再生骨料混凝土徐变特性基础试验[J].东南大学学报(自然科学版),2014,44(3):638-642.[doi:10.3969/j.issn.1001-0505.2014.03.033]
 Fan Yuhui,Xiao Jianzhuang,Cao Ming.Fundamental test on creep characteristics of recycled aggregate concrete[J].Journal of Southeast University (Natural Science Edition),2014,44(3):638-642.[doi:10.3969/j.issn.1001-0505.2014.03.033]
点击复制

再生骨料混凝土徐变特性基础试验()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第3期
页码:
638-642
栏目:
材料科学与工程
出版日期:
2014-05-16

文章信息/Info

Title:
Fundamental test on creep characteristics of recycled aggregate concrete
作者:
范玉辉12肖建庄1曹明1
1同济大学土木工程学院, 上海 200092; 2河南理工大学土木工程学院, 焦作 454003
Author(s):
Fan Yuhui12 Xiao Jianzhuang1 Cao Ming1
1College of Civil Engineering, Tongji University, Shanghai 200092, China
2School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China
关键词:
水泥浆 砂浆 再生骨料混凝土 徐变 预测模型
Keywords:
cement paste mortar recycled aggregate concrete creep predictive model
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2014.03.033
摘要:
以水灰比为参数对水泥浆的力学性能和徐变特性进行了基础试验.结果表明,水泥浆的弹性模量和抗压强度均随水灰比的增加而降低,外界环境(温度和湿度)对水泥浆的徐变影响不大.在此试验基础上,通过研究水灰比和水泥浆徐变函数(单位应力作用下弹性变形与徐变应变之和)之间的关系,建立了水泥浆和砂浆徐变函数的预测模型.对配合比为m(水泥)∶m(水)∶m(细骨料)=0.5∶1∶1.49的砂浆徐变预测结果和试验结果的对比分析表明,砂浆徐变函数预测模型可以较好地预测砂浆的徐变发展过程.模型再生混凝土的徐变试验证明,老砂浆的存在是再生混凝土徐变增加最重要的一个原因.
Abstract:
The fundamental tests on creep and mechanical properties of cement paste were conducted by varying the water cement ratio(w/c). The test results show that both the elastic modulus and compressive strength of cement paste decrease with the increase of w/c. The influence of external environment(temperature and humidity)on the development of cement paste creep is small. Based on the experimental study, the compliance function prediction model of cement paste and mortar is established after investigating the relationship between w/c and the compliance function of the cement paste. The comparison between the predicted and experimental results of mortar with m(cement)∶m(water)∶m(fine aggregate)=0.5∶1∶1.49 shows that the predictive model agrees well with the development of mortar creep. The test results from the modeled recycled concrete prove that the attached old mortar is one of the significant factors for the increase of recycled aggregate concrete creep.

参考文献/References:

[1] 惠荣炎,黄国兴,易冰若.混凝土的徐变[M].北京:中国铁道出版社,1988:36-38.
[2] Ajdukiewicz A, Kliszczewicz A. Influence of recycled aggregates on mechanical properties of HS/HPC [J]. Cement and Concrete Composites, 2002, 24(2): 269-279.
[3] Domingo-Cabo A, Lázaro C. Creep and shrinkage of recycled aggregate concrete [J]. Construction and Building Materials, 2009, 23(7): 2545-2553.
[4] Gómez-Soberón J M V. Creep of concrete with substitution of normal aggregate by recycled concrete aggregate [C]//ACI Special Publication SP209-25. Cancun, Mexico, 2002: 461-474.
[5] Neville A M, Dilger W H, Brooks J J. Creep of plain and structural concrete [M]. London: Construction Press, 1983: 36-38.
[6] Granger L P, Ba?ant Z P. Effect of composition on basic creep of concrete and cement paste [J]. Journal of Engineering Mechanics, 1995, 121(11): 1261-1270.
[7] 肖建庄,李文贵,刘琼.模型再生混凝土单轴受压性能细观数值模拟[J].同济大学学报:自然科学版,2011,39(6):791-797.
  Xiao Jianzhuang, Li Wengui, Liu Qiong. Meso-level numerical simulation on mechanical properties of modeled recycled concrete under uniaxial compression [J]. Journal of Tongji University: Natural Science, 2011, 39(6): 791-797.(in Chinese)
[8] 肖建庄,范玉辉.再生混凝土徐变试验及机理的模型化分析[J].建筑科学与工程学报,2012,29(4):19-24.
  Xiao Jianzhuang, Fan Yuhui. Experiment and mechanism modeling analysis on creep of recycled aggregate concrete [J]. Journal of Architecture and Civil Engineering, 2012, 29(4): 19-24.(in Chinese)
[9] 肖建庄,许向东,范玉辉.再生混凝土收缩徐变试验及徐变神经网络预测[J].建筑材料学报,2013,16(5):753-757.
  Xiao Jianzhuang, Xu Xiangdong, Fan Yuhui. On creep and shrinkage of recycled aggregate concrete and the prediction by ANN method [J]. Journal of Building Materials, 2013, 16(5): 753-757.(in Chinese)
[10] Powers T C. Physical properties of cement paste [C]// Fourth International Symposium on the Chemistry of Cement. Washington DC, USA, 1960: 577-609.
[11] Pavel P, Petr B. Creep of cement paste specimens made from CEM Ⅱ [C]//Proceedings of the 3rd International Conference on Applied Mathematics, Simulation, Modelling, Circuits, Systems and Signals. Athens, Greece, 2009: 33-38.
[12] Ward M A, Neville A M, Singh S P. Creep of air entrained concrete [J]. Concrete Research, 1969, 21(69): 205-210.
[13] Neville A M. Properties of concrete [M]. Harlow, UK: Longman Scientific & Technical, 1987: 268-275.
[14] Comité Euro-International du Béton. CEB-FIP model code for concrete structures[S]. Lausanne, Switzerland: Thomas Telford, 1990.

相似文献/References:

[1]刘志勇,张云升,姜骞,等.原位监测水泥基材料早期电阻率的变化过程[J].东南大学学报(自然科学版),2012,42(2):378.[doi:10.3969/j.issn.1001-0505.2012.02.035]
 Liu Zhiyong,Zhang Yunsheng,Jiang Qian,et al.In-situ monitoring of early-age electrical resistivity change process of cement-based materials[J].Journal of Southeast University (Natural Science Edition),2012,42(3):378.[doi:10.3969/j.issn.1001-0505.2012.02.035]
[2]张世义,范颖芳,李宁宁.纳米高岭土改性砂浆抗酸雨侵蚀试验研究[J].东南大学学报(自然科学版),2014,44(3):668.[doi:10.3969/j.issn.1001-0505.2014.03.038]
 Zhang Shiyi,Fan Yingfang,Li Ningning.Experimental study on acid resistance of nano-kaolinite modified cement mortar[J].Journal of Southeast University (Natural Science Edition),2014,44(3):668.[doi:10.3969/j.issn.1001-0505.2014.03.038]
[3]张丽辉,刘建忠,阳知乾,等.不同截面形状PP纤维对砂浆抗塑性开裂的影响及机理[J].东南大学学报(自然科学版),2016,46(1):160.[doi:10.3969/j.issn.1001-0505.2016.01.026]
 Zhang Lihui,Liu Jianzhong,Yang Zhiqian,et al.Influences and mechanism of polypropylene fibers with different cross-sections on anti-plastic-cracking of cement mortar[J].Journal of Southeast University (Natural Science Edition),2016,46(3):160.[doi:10.3969/j.issn.1001-0505.2016.01.026]

备注/Memo

备注/Memo:
收稿日期: 2013-10-16.
作者简介: 范玉辉(1983—),男,博士生, 讲师;肖建庄(联系人),男,博士,教授,博士生导师,jzx@tongji.edu.cn.
基金项目: 国家自然科学基金资助项目(51178340,51325802).
引用本文: 范玉辉,肖建庄,曹明.再生骨料混凝土徐变特性基础试验[J].东南大学学报:自然科学版,2014,44(3):638-642. [doi:10.3969/j.issn.1001-0505.2014.03.033]
更新日期/Last Update: 2014-05-20