Strength Prediction Models Of Groundnut Husk Ash (GHA) Concrete (original) (raw)

American Journal of Civil and Structural Engineering, 2014

Abstract

ABSTRACT This paper presents the findings of an investigation on the strengths of concrete containing Groundnut Husk Ash (GHA) and strength prediction models of the concrete. The GHA used was obtained by controlled burning of groundnut husk to a temperature of 600 o C and sieved through 75 µm sieve after allowing cooling. The compressive, splitting tensile and flexural strengths of GHA-Concrete grade 20 were investigated at replacement levels of 0, 5, 10, 20, 30 and 40 %, respectively, at curing ages of 3, 7, 28, 60 and 90 days in accordance with standard procedures. The strengths of GHA-Concrete were also modeled using Minitab statistical software to establish regression models. The result of the investigations showed that the compressive, splitting tensile and flexural strengths of concrete decreased with increase in GHA content. However 10 % replacement with GHA was considered as optimum for structural concrete. The regression models of GHA-Concrete for compressive, splitting tensile and flexural strengths were developed with R 2 values of 0.934, 0.905 and 0.910, respectively and are considered to be good for prediction of concrete strengths.

Austine Uche hasn't uploaded this paper.

Let Austine know you want this paper to be uploaded.

Ask for this paper to be uploaded.