Effect of aggregate characteristics on properties of cemented sand and gravel

被引:0
|
作者
Guo, Lixia [1 ,2 ,3 ]
Wu, Zheng [1 ]
Zhong, Ling [1 ,2 ,3 ]
Luo, Yun [4 ]
机构
[1] North China Univ Water Resources & Elect Power, Sch Water Conservancy, Zhengzhou 450045, Peoples R China
[2] Henan Water Valley Res Inst, Zhengzhou 450046, Peoples R China
[3] Henan Key Lab Water Environm Simulat & Treatment, Zhengzhou 450002, Peoples R China
[4] XinYang Hydrol & Water Resources Survey Bur, Xinyang 464000, Peoples R China
基金
中国国家自然科学基金;
关键词
cemented sand and gravel; aggregate characteristics; freeze-thaw damage; destructive characteristics; CONCRETE; STRENGTH;
D O I
10.1515/secm-2022-0220
中图分类号
TB33 [复合材料];
学科分类号
摘要
To improve the stability of cemented sand and gravel (CSG) dam construction materials, artificial aggregates can be selected to replace missing natural aggregates, and aggregate grading optimization can be carried out to meet the needs of engineering applications. This article uses finite-element analysis software to explore the influence of aggregate characteristics on the performance and destruction characteristics of CSG materials through numerical simulation. The results show that (1) with the increase of circular natural sand gravel aggregates, the peak stress and elastic modulus of the sample increase, while the strength also increases. (2) Compared to circular aggregates, polygonal aggregates have more edges and corners, which exacerbate the deformation disharmony between mortar and aggregates; the phenomenon of stress concentration is more obvious, so under the same loading step, the degree of damage of polygonal aggregates is greater than that of circular aggregates. (3) After the freeze-thaw cycle test, the deterioration of parameters in the CSG resulted in more severe damage and strength loss of the crushed stone aggregate than the circular aggregate sample. This conclusion can provide a reference for the design of CSG mix ratio in engineering sites.
引用
收藏
页数:11
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