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- Title
高强超微外加剂对喷射混凝土力学性能及回弹率的影响研究.
- Authors
魏子程; 王 林; 贺鑫鑫; 王宏波
- Abstract
Ordinary shotcrete in the process of spraying rebound rate is high, large amount of dust, strength is not easy to reach the standard, especially in the water-rich area, these conditions are more serious, in shotcrete mixed with a high strength ultramicro admixture, used to improve the mechanical properties of shotcrete, reduce the rebound rate of shotcrete and dust. In this paper, high strength ultramicro admixture is applied to shotcrete and its effect on mechanical properties and rebound rate of shotcrete is studied. The experimental results showed that the high-strength ultramicro admixture could significantly improve the compressive strength and flexural strength of shotcrete. In C25 shotcrete, when the dosage of high-strength ultramicro admixture was 6%,the 28d compressive strength and flexural strength of shotcrete increased by 6.4% and 32%,respectively, compared with the group without high-strength ultramicro admixture. The average rebound of shotcrete with high strength and ultra-fine admixture in engineering application is only 7.3%,28% lower than that of ordinary shotcrete, and the highest bond strength is 2.29mpa, which is 3 ~ 4 times of that of ordinary shotcrete.
- Subjects
SHOTCRETE; BOND strengths; COMPRESSIVE strength; FLEXURAL strength
- Publication
Fly Ash Comprehensive Utilization, 2023, Vol 37, Issue 5, p82
- ISSN
1005-8249
- Publication type
Article
- DOI
10.19860/j.cnki.issn1005-8249.2023.05.014