دورية أكاديمية
Experimental research on influence of curing environment on mechanical properties of coal gangue cementation
| العنوان: | Experimental research on influence of curing environment on mechanical properties of coal gangue cementation |
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| المؤلفون: | Wu Haifeng, Shen Jianjun, Liu Yin |
| المصدر: | Science and Engineering of Composite Materials, Vol 31, Iss 1, Pp 133-44 (2024) |
| بيانات النشر: | De Gruyter, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials |
| مصطلحات موضوعية: | coal gangue cement, maintenance environment, influence mechanism structure model, uniaxial compressive strength, grey correlation degree, Materials of engineering and construction. Mechanics of materials, TA401-492 |
| الوصف: | To investigate the impact of curing environments on the mechanical properties of coal gangue cementation (CGC), various curing methods were established, including standard bag curing, standard curing, natural sealing curing, natural curing, water curing, and varying curing ages. By examining the uniaxial compressive strength (UCS) and stress–strain relationship of CGC by applying axial loads, the influence mechanism was analyzed in terms of both physical and chemical reactions. Furthermore, a mechanistic structural model was established to illustrate the impact of the curing environment on the mechanical properties of CGC. The primary substances and reasons affecting the mechanical properties of CGC were analyzed through the use of scanning electron microscopy and X-ray diffraction techniques. Evaluation of influence factors on CGC mechanical properties by grey correlation degree. The findings indicate that curing temperature, humidity, and carbonization are the principal factors influencing the UCS. Maintaining constant temperature and humidity while isolating CO2 is conducive to improving the UCS. The hydration products, such as needle-like ettringite and white fibrous calcium silicate hydrogel, fill the internal voids of CGC and are the primary substances affecting UCS. The hydration products formed during standard curing and natural curing of CGC can undergo carbonation with CO2 to form CaCO3, which interacts with ettringite and hydrated calcium silicate to provide strength support for CGC. However, beyond a certain age, CO2 will progressively diminish the UCS; the larger the contact area and the longer the exposure time to the gel materials in CGC, the faster the UCS decreases. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2191-0359 2024-0007 |
| العلاقة: | https://doaj.org/toc/2191-0359Test |
| DOI: | 10.1515/secm-2024-0007 |
| الوصول الحر: | https://doaj.org/article/716fe0b598394dd8bb019542a6a76042Test |
| رقم الانضمام: | edsdoj.716fe0b598394dd8bb019542a6a76042 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 21910359 20240007 |
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| DOI: | 10.1515/secm-2024-0007 |