- Tytuł:
- Analysis on the influence factor of low-strength wet shotcrete in frigid mining area
- Autorzy:
-
Sun, Wei
Shengyou, Zhang
Feng, Xinglong
Hou, Kepeng - Powiązania:
- https://bibliotekanauki.pl/articles/219132.pdf
- Data publikacji:
- 2020
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
temperatura
beton natryskowy
obszar górniczy
kopalnia
wet shotcrete
frigid area
Fishbone Diagram
temperature
low strength - Opis:
- Wet shotcrete technology is being gradually used in roadway support in frigid mining areas. Thus, problems such as low strength, fragility, and high repair rate have also emerged. This study focuses on low strength, cracking, and other problems in the wet shotcrete support of a mine. It introduced the fishbone diagram to investigate the effects of temperature, cement content, and water-cement ratio (W/C) on the strength of the shotcrete layer. The microscopic morphology of wet shotcrete based on scanning electron microscopy (SEM) is observed. Results demonstrated that temperature was the main influencing factor of wet shotcrete in frigid mining areas. When the curing temperature was lower than 10°C, the early strength of wet shotcrete dropped significantly. Temperatures above 15°C were favorable for later gain in strength. W/C was of a complementary relationship with strength development at different ages. Temperature was the essential factor that influenced the microscopic morphology of wet shotcrete. Furthermore, internal initial porosity and aggregate interface bonding strength had a direct effect on macro-mechanical properties of wet shotcrete.
- Źródło:
-
Archives of Mining Sciences; 2020, 65, 2; 285-298
0860-7001 - Pojawia się w:
- Archives of Mining Sciences
- Dostawca treści:
- Biblioteka Nauki
Artykuł