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Performance of Coal Gangue-Based Cemented Backfill Material Modified by Water-Reducing Agents
المؤلفون المشاركون
Qi, Tingye
Guo, Yuxia
Wang, Peng
Feng, Guorui
Liu, Guoyan
Ren, Ang
المصدر
Advances in Materials Science and Engineering
العدد
المجلد 2020، العدد 2020 (31 ديسمبر/كانون الأول 2020)، ص ص. 1-11، 11ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2020-01-11
دولة النشر
مصر
عدد الصفحات
11
الملخص EN
Coal gangue-based cemented backfill material (CGCBM) is developed for backfilling the goaf in coal mines.
As fresh CGCBM slurry is generally transported into underground openings through a pipeline, and after hardening, it plays the role of supporting the overlying strata.
The fluidity, stability, and mechanical (compressive strength) of CGCBM become the most important properties.
Adding water-reducing agents (WRAs) is considered to improve the fluidity, stability, and mechanical properties of CGCBM, but there is a risk of increased bleeding.
So, two types of WRA (naphthalene series (WRA1) and poly carboxylic acid (WRA2)) are used at different contents (1.0%-2% for WRA1, 0.2%–0.6% for WRA2) by mass of binder.
Slump, slump flow, yield stress, and plastic viscosity test are used to evaluate the fluidity properties of CGCBM after adding WRA.
Bleeding rate test is used to evaluate the stability of CGCBM after adding WRA.
Compressive strength is the most important factor in measuring the mechanical properties.
SEM and XRD tests are used to analyse the mechanism of strength change.
Results show that the slump, slump flow, and plastic viscosity increase after adding WRA, which reduces the yield stress and improves the fluidity.
The bleeding rate increases with the increase of WRA content, leading to a decrease in stability.
Adding WRA increases the compressive strength, and it increases first and then decreases with the increase of the content at the later stage.
Considering the effects of WRA on the fluidity, stability, and compressive strength properties of CGCBM, the reasonable content of WRA1 and WRA2 is 1.5% and 0.4%, respectively.
The research results provide guidance for the design and preparation of CGCBM with favourable performance in practical production.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Guo, Yuxia& Wang, Peng& Feng, Guorui& Qi, Tingye& Liu, Guoyan& Ren, Ang. 2020. Performance of Coal Gangue-Based Cemented Backfill Material Modified by Water-Reducing Agents. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1127989
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Guo, Yuxia…[et al.]. Performance of Coal Gangue-Based Cemented Backfill Material Modified by Water-Reducing Agents. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1127989
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Guo, Yuxia& Wang, Peng& Feng, Guorui& Qi, Tingye& Liu, Guoyan& Ren, Ang. Performance of Coal Gangue-Based Cemented Backfill Material Modified by Water-Reducing Agents. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1127989
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1127989
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