论文成果
Effect of bauxite aggregate in cement composites on mechanical properties and resistance against high-velocity projectile impact
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发表刊物：
Cement and Concrete Composites
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关键字：
Bauxite; Granite; Strength; Elastic modulus; Hardness; Projectile impact; Concrete; UHPC
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摘要：
This paper investigates the effect of the bauxite sand and coarse aggregate on the quasi-static mechanical properties and resistance against high-velocity projectile impact of cement composites with 28-day compressive strengths from 34.2 to 197.2 MPa, in comparison to that of the siliceous sand and granite coarse aggregate. Mechanical properties investigated include compressive strength, elastic modulus, compressive stress-strain behavior, splitting tensile strength, and effective hardness index. Impact resistance was evaluated using 8.0-mm-diameter, 7.8-g-mass, conical-nosed projectiles at velocities of approximately 400 m/s. The results indicate that the bauxite sand and coarse aggregate are beneficial for enhancing mechanical properties and impact resistance of cement composites compared to the siliceous sand and granite coarse aggregate. The concrete incorporating both bauxite sand and coarse aggregate exhibits compressive strength of about 200 MPa and elastic modulus of about 105 GPa at 28 days under ambient curing conditions, and better impact resistance than a granite rock specimen. This study will provide insights into the development of advanced cement composites with superior mechanical properties and impact resistance for protective structures.
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全部作者：
Min-Hong Zhang
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第一作者：
Fengling Zhang
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论文类型：
期刊论文
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通讯作者：
Leong Hien Poh
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学科门类：
工学
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一级学科：
土木工程
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文献类型：
J
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卷号：
118
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页面范围：
103915
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是否译文：
否
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发表时间：
2021-04-01
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收录刊物：
SCI
上一条：Ultra-high performance concrete subjected to high-velocity projectile impact: implementation of K&C model with consideration of failure surfaces and dynamic increase factors
下一条：Engineering high-performance cementitious matrices for improved projectile impact resistance with silane, micro fibrillated cellulose and fine calcined bauxite aggregate
