IDEAS home Printed from https://ideas.repec.org/a/gam/jsusta/v14y2022i14p8333-d857836.html
   My bibliography  Save this article

Study on Influence Factors of Compressive Strength of Low Density Backfill Foamed Concrete Used in Natural Gas Pipeline Tunnel

Author

Listed:
  • Chunbao Li

    (College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Xiaotian Li

    (College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Di Guan

    (Construction Project Management Branch of China National Petroleum Pipeline Network Group Co., Ltd., Langfang 065001, China)

  • Shen Li

    (Construction Project Management Branch of China National Petroleum Pipeline Network Group Co., Ltd., Langfang 065001, China)

  • Wenpu Lv

    (Henan Huatai New Material Technology Corp. Ltd., Nanyang 473000, China)

  • Ziqin Cong

    (College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, China)

  • Valentina Y. Soloveva

    (Emperor Alexander I St. Petersburg State Transport University, 190031 St. Petersburg, Russia)

  • Hojiboev Dalerjon

    (Mining-Metallurgical Institute of Tajikistan, Buston City 735730, Tajikistan)

  • Pengju Qin

    (College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China)

  • Xiaohui Liu

    (Qingdao Urban Development Group Co., Ltd., Qingdao 266061, China)

Abstract

Foamed concrete is mostly used for backfilling of long-distance tunnels and compressive strength is an important technical index to control the quality of foamed concrete. The influence factors on compressive strength of low-density foamed concrete were obtained by the single factor test method based on the targeted dry density and compressive strength. The results show that the HT composed of pollution-free animal protein oil and vegetable oil is an efficient foaming agent and can produce stable foams. The cementation ability of cement can be fully expressed when a water to cement ratio of 0.45~0.5 is employed, making foamed concrete have a compressive strength higher than 2 MPa. The foam content is inversely proportional to the compressive strength and dry density of foamed concrete, and the volume ratio of slurry to foam should be 2:1~3:1. The content of fly ash is also inversely proportional to the compressive strength but positively proportional to the dry density. When the content of admixture is 40~55%, the compressive strength of foamed concrete with low density is not less than 2 MPa. The mixing proportion can be changed in the reasonable range to meet the requirements of different projects.

Suggested Citation

  • Chunbao Li & Xiaotian Li & Di Guan & Shen Li & Wenpu Lv & Ziqin Cong & Valentina Y. Soloveva & Hojiboev Dalerjon & Pengju Qin & Xiaohui Liu, 2022. "Study on Influence Factors of Compressive Strength of Low Density Backfill Foamed Concrete Used in Natural Gas Pipeline Tunnel," Sustainability, MDPI, vol. 14(14), pages 1-13, July.
  • Handle: RePEc:gam:jsusta:v:14:y:2022:i:14:p:8333-:d:857836
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/2071-1050/14/14/8333/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/2071-1050/14/14/8333/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jsusta:v:14:y:2022:i:14:p:8333-:d:857836. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.