Transport and M
Transport and Mechanical Properties of Silica Fume Lightweight Aggregate Concrete
Majid Matouq Assas
Civil Engineering Department, College of Engineering & Islamic Architecture, Umm al Qura University, Makkah, KSA.firstname.lastname@example.org
Abstract: This paper describes the use of scoria, a natural lightweight aggregate in concrete. The purpose of this paper is to study the performance of a structural Light weight aggregate concrete up to 28 days in terms of permeability and compressive strength concrete. The concrete mixes contained silica fume at 10% replaced by weight of cementitious materials. Variables, which were taken into consideration, were the percentage of sand as a partial replacement for lightweight fine aggregate (0, 25, 50 and 75% by weight). The effect of sand replacement is considerable in terms of densities, strength-to-density ratio and chloride ion permeability. It was found that when the sand content in increased in the mixes, both the density and compressive strength were increased in value up to 30% and 27%, respectively. The resistance of scoria lightweight aggregate concrete to chloride ion penetration was increased when the silica fume was utilized in the mix. As per the assessment parameters, all the lightweight concrete containing silica fume exhibited much lower corrosion rates when compared to normal weight aggregate concrete.
[Majid Matouq Assas. Transport and Mechanical Properties of Silica Fume Lightweight Aggregate Concrete Life Sci J 2012;9(1):628-635]. (ISSN: 1097-8135). http://www.lifesciencesite.com. 92
Keywords: Compressive strength; Lightweight aggregate; Permeability; Concrete; Silica fume. Full Text 92