复掺粉煤灰和硅粉抗冲磨混凝土配合比设计及抗裂性能
发布时间：2018-07-27 17:07
【摘要】：抗冲磨混凝土(Abrasion Resistant Concrete)的抗裂性在学术上研究得较少。研究认为针对高水头、高速挟沙水流,抗冲磨混凝土的抗裂性应作为主要耐久性指标。为此设计了一系列不同配合比的抗冲磨混凝土,以脆性系数、干缩率2种指标,探讨了粉煤灰和硅粉对抗冲磨混凝土抗裂性能的影响。结果表明:在掺20%FA、20%FA+(5%、8%、10%)SF的水泥胶凝材料浆体中,脆性系数与干缩率较小,水化产物以水化硅酸钙占主体,浆体结构致密,充分说明粉煤灰和硅粉可优化浆体结构,对提高抗冲磨混凝土的抗裂性有利。
[Abstract]:The cracking resistance of (Abrasion Resistant Concrete) has been studied less academically. It is considered that the crack resistance of anti-wear concrete should be regarded as the main durability index for high water head and high speed sand carrying flow. In this paper, a series of anti-wear concrete with different mix ratio were designed. The effects of fly ash and silica powder on the crack resistance of the concrete were discussed with two indexes of brittleness coefficient and dry shrinkage ratio. The results show that the brittleness coefficient and dry shrinkage rate of cement cementitious material with 20% 20% SF are small, the hydration products are mainly calcium silicate hydrate, and the slurry structure is dense. It fully shows that fly ash and silica powder can optimize the slurry structure. It is beneficial to improve the crack resistance of the anti-wear concrete.
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家大坝安全工程技术研究中心项目(2410100032)
【分类号】：TV431
本文编号：2148543
[Abstract]:The cracking resistance of (Abrasion Resistant Concrete) has been studied less academically. It is considered that the crack resistance of anti-wear concrete should be regarded as the main durability index for high water head and high speed sand carrying flow. In this paper, a series of anti-wear concrete with different mix ratio were designed. The effects of fly ash and silica powder on the crack resistance of the concrete were discussed with two indexes of brittleness coefficient and dry shrinkage ratio. The results show that the brittleness coefficient and dry shrinkage rate of cement cementitious material with 20% 20% SF are small, the hydration products are mainly calcium silicate hydrate, and the slurry structure is dense. It fully shows that fly ash and silica powder can optimize the slurry structure. It is beneficial to improve the crack resistance of the anti-wear concrete.
【作者单位】： 武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家大坝安全工程技术研究中心项目(2410100032)
【分类号】：TV431
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