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Influence of Moisture Content on Mechanical Properties of Autoclaved Aerated Concrete

Received: 20 November 2019     Accepted: 16 December 2019     Published: 24 December 2019
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Abstract

Autoclaved aerated concrete (AAC) is a new type of green building material rapidly developed nowadays. Moisture content plays a significant effect on its mechanical properties. In this study, a series of uniaxial compression tests were conducted to evaluate the effect of moisture content on the mechanical behaviors. During the tests, full stress-strain curves were obtained. The influence of water content on AAC stress-strain full curve shape, elastic modulus, peak stress, peak strain and ultimate strain was analyzed. The fitting equations of water content with peak stress, peak strain and elastic modulus were established. The results show that the brittleness of AAC decreased with the increased of water content, and the failure mode gradually transited from brittle to ductile failure. When the water content increased from 0% to 10%, obvious difference in the stress-strain curves can be observed. The peak stress decreased by 20.00% and 11.63% when the moisture content was 5% and 10%, respectively. However, when the water content increased from 10% to 40%, the peak stress decreased slowly. The rising section relation model of AAC stress-strain full curve can be fitted by cubic polynomial, which provided reference basis for finite element analysis.

Published in International Journal of Transportation Engineering and Technology (Volume 5, Issue 4)
DOI 10.11648/j.ijtet.20190504.16
Page(s) 97-102
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Autoclaved Aerated Concrete (AAC), Moisture Content, Uniaxial Loading, Peak Strain, Stress-strain Curve

References
[1] Ji-Kuiab M, Jiaa T. Application of Aerated Concrete Self-insulation System in Cold Region [J]. Building Energy Efficiency, 2015.
[2] Yaoqing X, Qianfeng Y. Experimental study on the total stress-strain curve of porous lightweight concrete [J]. Sichuan Building Science, 2010.
[3] TANG L. Experimental study on effect of moisture content on the performance of the autoclaved aerated concrete block [D]. Hunan University of Science and Technology, 2011. (in Chinese)
[4] Huan Z. Autoclaved Fly Ash-sand Aerated Concrete Stress-strain Full Curve and the Mechanical Properties of the Block Masonry Experiment Research [D]. Changsha University of Technology, 2013. (in Chinese)
[5] Guowei Z, Boshan C, Qisong M, et al. STUDY OF JOINTS OF AUTOCLAVED AERATED CONCRETE SLABS [J]. Industrial Construction, 2017.
[6] Ferretti D, Michelini E, Rosati G. Mechanical characterization of autoclaved aerated concrete masonry subjected to in-plane loading: Experimental investigation and FE modeling [J]. Construction and Building Materials, 2015, 98: 353-365.
[7] Bonakdar A, Babbitt F, Mobasher B. Physical and Mechanical Characterization of Fiber-Reinforced Aerated Concrete (FRAC) [J]. Cement and Concrete Composites, 2013, 38.
[8] Changtao Y, Shan S, Yang S, et al. Study on rapid estimation of autoclaved aerated concrete compressive strength [J]. New Building Materials, 2017, 44 (07): 52-55.
[9] Zbyek Pavlík, Luká Fiala, Robert erny. Analysis of dielectric mixing models for the moisture assessment of porous building materials [J]. Pollack Periodica. 2009, Vol. 4 (No.2): 79-88.
[10] R Drochytka, J Zach, J Hroudová. Non-destructive Testing of Influence of Moisture on Properties of Autoclaved Aerated Concrete [J].
[11] Dian-Zhong L, Fa-Yu W, Shu-Ming H E. EXPERIMENTAL RESEARCH FOR CONSTITUTIVE RELATION OF FOAM CONCRETE UNDER UNIAXIAL COMPRESSIONS [J]. Architecture Technology, 2016.
[12] Meng H R, Yao Q F, Zhang Y. Stady on the constitutive model of the lightweight infilled material in multi-ribbed wall structure [J]. Concrete, 2007.
[13] Sun H, Lieping Y E, Ding J, et al. Shrinkage and creep of high-strength lightweight aggregate concrete [J]. Journal of Tsinghua University, 2007.
[14] Wang Z. Experimental study on Mohr-Coulomb model with damage for concrete [J]. Beijing Jiaotong Daxue Xuebao/Journal of Beijing Jiaotong University, 2013, 37 (4): 84-88.
[15] Hanmin L, Feng G. Relation between strength and moisture content of aerocrete [J]. Housing Materials & Applications, 2004.
[16] Han B, Wang W, Wang Y. Water content effects on compression strength of brick masonry members [J]. Journal of Beijing Jiaotong University, 2011, 35 (1): 6-8.
[17] Guo Z. Chapter 2 - Basic Mechanical Behavior [J]. Principles of Reinforced Concrete, 2014: 9-52.
Cite This Article
  • APA Style

    Chunning Deng, Weiqun Cai, Jian Yin, Fen Yang, Linchen Li. (2019). Influence of Moisture Content on Mechanical Properties of Autoclaved Aerated Concrete. International Journal of Transportation Engineering and Technology, 5(4), 97-102. https://doi.org/10.11648/j.ijtet.20190504.16

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    ACS Style

    Chunning Deng; Weiqun Cai; Jian Yin; Fen Yang; Linchen Li. Influence of Moisture Content on Mechanical Properties of Autoclaved Aerated Concrete. Int. J. Transp. Eng. Technol. 2019, 5(4), 97-102. doi: 10.11648/j.ijtet.20190504.16

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    AMA Style

    Chunning Deng, Weiqun Cai, Jian Yin, Fen Yang, Linchen Li. Influence of Moisture Content on Mechanical Properties of Autoclaved Aerated Concrete. Int J Transp Eng Technol. 2019;5(4):97-102. doi: 10.11648/j.ijtet.20190504.16

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  • @article{10.11648/j.ijtet.20190504.16,
      author = {Chunning Deng and Weiqun Cai and Jian Yin and Fen Yang and Linchen Li},
      title = {Influence of Moisture Content on Mechanical Properties of Autoclaved Aerated Concrete},
      journal = {International Journal of Transportation Engineering and Technology},
      volume = {5},
      number = {4},
      pages = {97-102},
      doi = {10.11648/j.ijtet.20190504.16},
      url = {https://doi.org/10.11648/j.ijtet.20190504.16},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijtet.20190504.16},
      abstract = {Autoclaved aerated concrete (AAC) is a new type of green building material rapidly developed nowadays. Moisture content plays a significant effect on its mechanical properties. In this study, a series of uniaxial compression tests were conducted to evaluate the effect of moisture content on the mechanical behaviors. During the tests, full stress-strain curves were obtained. The influence of water content on AAC stress-strain full curve shape, elastic modulus, peak stress, peak strain and ultimate strain was analyzed. The fitting equations of water content with peak stress, peak strain and elastic modulus were established. The results show that the brittleness of AAC decreased with the increased of water content, and the failure mode gradually transited from brittle to ductile failure. When the water content increased from 0% to 10%, obvious difference in the stress-strain curves can be observed. The peak stress decreased by 20.00% and 11.63% when the moisture content was 5% and 10%, respectively. However, when the water content increased from 10% to 40%, the peak stress decreased slowly. The rising section relation model of AAC stress-strain full curve can be fitted by cubic polynomial, which provided reference basis for finite element analysis.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - Influence of Moisture Content on Mechanical Properties of Autoclaved Aerated Concrete
    AU  - Chunning Deng
    AU  - Weiqun Cai
    AU  - Jian Yin
    AU  - Fen Yang
    AU  - Linchen Li
    Y1  - 2019/12/24
    PY  - 2019
    N1  - https://doi.org/10.11648/j.ijtet.20190504.16
    DO  - 10.11648/j.ijtet.20190504.16
    T2  - International Journal of Transportation Engineering and Technology
    JF  - International Journal of Transportation Engineering and Technology
    JO  - International Journal of Transportation Engineering and Technology
    SP  - 97
    EP  - 102
    PB  - Science Publishing Group
    SN  - 2575-1751
    UR  - https://doi.org/10.11648/j.ijtet.20190504.16
    AB  - Autoclaved aerated concrete (AAC) is a new type of green building material rapidly developed nowadays. Moisture content plays a significant effect on its mechanical properties. In this study, a series of uniaxial compression tests were conducted to evaluate the effect of moisture content on the mechanical behaviors. During the tests, full stress-strain curves were obtained. The influence of water content on AAC stress-strain full curve shape, elastic modulus, peak stress, peak strain and ultimate strain was analyzed. The fitting equations of water content with peak stress, peak strain and elastic modulus were established. The results show that the brittleness of AAC decreased with the increased of water content, and the failure mode gradually transited from brittle to ductile failure. When the water content increased from 0% to 10%, obvious difference in the stress-strain curves can be observed. The peak stress decreased by 20.00% and 11.63% when the moisture content was 5% and 10%, respectively. However, when the water content increased from 10% to 40%, the peak stress decreased slowly. The rising section relation model of AAC stress-strain full curve can be fitted by cubic polynomial, which provided reference basis for finite element analysis.
    VL  - 5
    IS  - 4
    ER  - 

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Author Information
  • College of Civil Engineering, Central South University of Forestry and Technology, Changsha, China

  • College of Civil Engineering, Central South University of Forestry and Technology, Changsha, China

  • College of Civil Engineering, Central South University of Forestry and Technology, Changsha, China

  • College of Civil Engineering, Central South University of Forestry and Technology, Changsha, China

  • College of Civil Engineering, Central South University of Forestry and Technology, Changsha, China

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