Content area
Full Text
ABSTRACT
The present trend in the concrete technology is of increasing the strength and durability of concrete to meet the demands of modern construction world. These factors can be achieved in concrete by adding various blending materials with cement or separately to concrete. The materials suitable for blending are ground granulated blast furnace slag, silica fume, fly ash super plasticizers etc., The experimental investigations have been made to study the suitability of the use of mineral and chemical admixtures from the industry for the replacement in concrete in order to reduce the environmental problems. This experimental investigation is aimed to utilize such mineral and chemical admixtures as a partial replacement for cement in concrete. M30 grade concrete is taken for investigation. The cement is replaced by fly ash, ground granulated blast furnace slag from 10% to 50 % with an increment of 10%, and silica fume 10%.The chemical admixture super plasticizer is used at 0.5% by weight of replacement of cement in order to improve the properties of fresh concrete. The strength and durability properties studied of hardened concrete include compressive strength of cube and cylinder, split tensile strength of cylinder, flexural strength of prism and stress strain behavior of cylinder and durability tests such as water absorption, sulphate attack and chloride attack for various percentage of replacement of cement by fly ash, silica fume, ground granulated blast furnace slag, super plasticizers etc., have been studied. The results are compared with that of the conventional concrete. Based on the results of the experimental study some important conclusions have been drawn.
KEYWORDS- Compressive strength, flexural strength, GGBS, Recron 3s fiber, Split tensile strength.
I. INTRODUCTION
A concrete structure is said to be durable if it withstand the condition for which it has been designed without deterioration, over a period year's .Deterioration is an inherent process from any material and concrete is no exception to this. Therefore it would be unrealistic to expect any concrete structure to maintain its "as new" condition without suitable maintenance. The present trend in the concrete technology is of increasing the strength and durability of concrete to meet the demand of modern construction world. These factors can be achieved in concrete by adding various blending materials with cement or separately to...