Annual Book Of Astm Standards

Improvement in concrete behavior with fly ash, silica-fume and coconut fibres

Engineered Cementitious Composites (ECC) have demonstrated superior mechanical and durability performance than conventional concrete. In the micromechanical reinforcing system of ECC, fibers play a pivotal role in establishing the ultrahigh tensile ductility and autogenous crack width control. This article reviews the state-of-the-art of discontinuous micro-fibers as intrinsic reinforcement of ECC regarding technical performance as well as environmental and economic impacts. Mechanical properties of ECC made with different micro-fibers, man-made or natural, and their embodied energy, emissions and material cost, are comprehensively surveyed. Further, studies on fiber hybridization are discussed regarding the combination of different types of fibers to form synergetic reinforcements that mitigate total material cost, and potentially enhance the composite performance. Recommendations on fiber selections are highlighted and directions for future research are suggested.

Discontinuous micro-fibers as intrinsic reinforcement for ductile Engineered Cementitious Composites (ECC)

Machine learning-based prediction for compressive and flexural strengths of steel fiber-reinforced concrete

A review of mechanical properties of fibre reinforced concrete at elevated temperatures

Use of glass and nylon fibers in concrete for controlling early age micro cracking in bridge decks

Efficiency of silica-fume content in plain and natural fiber reinforced concrete for concrete road

Recently, the addition of natural fibers to high strength concrete (HSC) has been of great interest in the field of construction materials. Compared to artificial fibers, natural fibers are cheap and locally available. Among all natural fibers, coconut fibers have the greatest known toughness. In this work, the mechanical properties of coconut fiber reinforced high strength concrete (CFR-HSC) are explored. Silica fume (10% by mass) and super plasticizer (1% by mass) are also added to the CFR-HSC. The influence of 25 mm-, 50 mm-, and 75 mm-long coconut fibers and 0.5%, 1%, 1.5%, and 2% contents by mass is investigated. The microstructure of CFR-HSC is studied using scanning electron microscopy (SEM). The experimental results revealed that CFR-HSC has improved compressive, splitting-tensile, and flexural strengths, and energy absorption and toughness indices compared to HSC. The overall best results are obtained for the CFR-HSC having 50 mm long coconut fibers with 1.5% content by cement mass.

https://www.mdpi.com/1996-1944/13/5/1075/pdf

Mehran Khan

Papers

Improvement in concrete behavior with fly ash, silica-fume and coconut fibres

Use of glass and nylon fibers in concrete for controlling early age micro cracking in bridge decks

Efficiency of silica-fume content in plain and natural fiber reinforced concrete for concrete road

Effect of Coconut Fiber Length and Content on Properties of High Strength Concrete.

Effect of super plasticizer on the properties of medium strength concrete prepared with coconut fiber