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首页> 美国卫生研究院文献>Materials >Influence of Crimped Steel Fibre on Properties of Concrete Based on an Aggregate Mix of Waste and Natural Aggregates
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Influence of Crimped Steel Fibre on Properties of Concrete Based on an Aggregate Mix of Waste and Natural Aggregates

机译：基于废料和天然骨料混合料的卷曲钢纤维对混凝土性能的影响

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This research was inspired by the growing global shortage of natural aggregates. Different types of waste ceramics (apart from recycled concrete) are the most popular materials for the production of waste aggregates as possible substitutes for natural ones. The aim of this research was to analyse the efficiency of different aggregate mixes composed of waste and natural materials focusing on two waste ceramic aggregates, which were prepared concrete mixes based on specifically composed aggregates (blend of natural aggregate, porous and iron oxide-rich (red) waste ceramic aggregate, and dense, kaolin-based (white) waste ceramic aggregate). All aggregates were thoroughly tested before utilisation for concrete mix creation. Altogether, four blends of aggregates were prepared in order to prepare concrete mixes using a simplex experiment design. The mixes were then modified by adding various amounts of crimped steel fibre. Such properties of hardened steel fibre-reinforced concrete (SFRC) such as density, compressive strength, shear strength, ultrasound propagation velocity, dynamic modulus of elasticity, and limit of proportionality during flexural testing were of special interest. Tests were conducted according to European and Japanese standards. The achieved fibre-reinforced concretes were characterised by satisfactory strength characteristics, thereby enabling the substitution of traditional reinforcement. Strength classes according to the Model Code 2010 were assigned.
机译：这项研究的灵感来自全球日益增长的天然骨料短缺。不同种类的废陶瓷（除再生混凝土外）是生产废骨料的最流行材料，可以替代天然骨料。这项研究的目的是分析以两种废弃的陶瓷骨料为主要成分的由废料和天然材料组成的不同骨料混合料的效率，这两种水泥混合料是基于专门组成的骨料（天然骨料，多孔和富铁氧化物（红色）废陶瓷骨料和致密的高岭土基（白色）废陶瓷骨料）。在用于混凝土拌合料生产之前，对所有骨料进行了彻底的测试。总共准备了四种骨料掺合物，以便使用单纯实验设计制备混凝土掺合物。然后通过添加各种量的卷曲钢纤维来改性混合物。硬化钢纤维混凝土（SFRC）的这些特性，例如密度，抗压强度，抗剪强度，超声传播速度，动态弹性模量以及弯曲试验期间的比例极限，尤其令人关注。根据欧洲和日本标准进行测试。所获得的纤维增强混凝土的特征在于令人满意的强度特性，从而能够替代传统的增强材料。分配了根据标准代码2010的强度等级。

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