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Fibre reinforced concrete with a combination of polyolefin and steel-hooked fibres

机译：纤维增强混凝土，结合聚烯烃和钢钩纤维

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Self-compacting polyolefin fibre reinforced concrete has shown high performance in both fresh and hardened state. Post-cracking behaviour provides significant residual strengths especially for large deformations. For small deformations, flexural residual strength could be enhanced with a small amount of steel hooked fibres, obtaining a hybrid fibre-reinforced concrete well suited for structural use. Four types of conventional fibre-reinforced concrete with steel and polyolefin fibres were produced on the basis of the same self-compacting concrete also manufactured as reference. These concrete mixtures were manufactured separately with the same fibre contents being subsequently used for two more hybrid mixtures. Flexural and uniaxial fracture tests were performed in addition to the assessment of fresh and mechanical properties. The research showed both synergies (with the two types of fibres working together in the fracture processes) and an improvement of the orientation and distribution of the fibres on the fracture surface. (C) 2017 Elsevier Ltd. All rights reserved.
机译：自密实的聚烯烃纤维增强混凝土在新鲜和硬化状态下均显示出高性能。裂纹后行为提供了显着的残余强度，尤其是对于大变形而言。对于较小的变形，可以用少量的钢钩纤维来增强弯曲残余强度，从而获得一种非常适合于结构用途的混合纤维增强混凝土。基于相同的自密实混凝土（也作为参考制造）生产了四种类型的具有钢和聚烯烃纤维的常规纤维增强混凝土。这些混凝土混合物是分别制造的，具有相同的纤维含量，随后又用于另外两种混合混合物。除了评估新鲜和机械性能外，还进行了弯曲和单轴断裂试验。研究显示了两种协同作用（两种类型的纤维在断裂过程中协同工作）以及纤维在断裂表面上的定向和分布的改善。 （C）2017 Elsevier Ltd.保留所有权利。

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