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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Influence of Mineral Admixtures on Properties of Fiber Reinforced Dry-Mix Shotcrete
Author(s): V. Bindiganavile and N. Banthiaq
Publication: Special Publication
Appears on pages(s): 931-950
Keywords: carbon black; fly ash; metakaolin; rebound; shotcrete;
silica fume; steel fibers; toughness
Abstract:Both material and fiber rebound in dry-mix shotcrete are high, and the use of an appropriate mineral admixture is known to alleviate the problem. However, the exact influence of the admixture particle size, gradation and shape on the rebound and the ultimate mechanical properties of shotcrete are poorly understood. This study is divided into two parts: in the first part, the effectiveness of four mineral admixtures-fly ash, silica fume, high reactivity metakaolin (HRM) and carbon black-with varying particle size gradations and shapes was investigated from a rebound reduction point of view. In the second part, HRM and silica fume were compared on the basis of hardened mechanical properties with special emphasis on flexural toughness in the presence of fiber reinforcement.
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