Effect of fibers types on strength of lightweight foamed concrete

Abstract

Foamed concrete is known for its weak strength due to the high porosity caused by air bubbles. The focus of this research was on studying the most important structural feature, which is the compressive strength at 7 &28 days of reinforced foamed concrete with different types of single fibres, such as hooked-ends steel fibres, corrugated steel fibres and polypropylene fibres. in addition to, foamed concrete reinforced with hybrid fibres (using the combination of polypropylene with hooked-ends Steel Fibres) and (combination of polypropylene with corrugated fibres), The best results were obtained basically using hybrid fibres of 0.4% hooked-ends steel fibres with0.3Kg/m3 polypropylene fibre followed by using 0.4% corrugated steel fibres with 0.3Kg/m3 polypropylene fibre.

Effect of Using Glass Fiber Reinforced Polymer (GFRP) and Deformed Steel Bars on the Bonding Behavior of Lightweight Foamed Concrete

“…The compressive strength, splitting tensile strength, flexural strength and modulus of elasticity of FC were found to be enhanced by 20.0%, 90.8%, 130.6%, and 113.4%, respectively, compared to foamed concrete without fibers. This is because the fibers act as a connecting bridge inside the concrete which helps to restrict micro-and macro-cracks' formation [8,39,40]. In addition, fibers, especially PPF, bind with concrete via mechanical linking and interfacial interaction [41].…”

“…By incorporating foamed concrete in the construction sector, exploitation of natural resources, mainly the coarse aggregates can be sustainably monitored [6,7]. Additionally, some other advantages offered by the foamed concrete are (i) enhanced thermal insulation, consequently reducing the energy expenditure, (ii) consumption of harmful environmental wastes (such as silica fume, fly ash, and ground granulated blast-furnace slag (GGBS) [8,9]) with pozzolanic properties that can used as chemical binders, thereby reducing cement consumption and therefore high carbon emissions, (iii) ease in transportation of structural members due to its light weight, which reduces labor costs and therefore the cost of project [10].…”