EFFECTS OF PERMEABILITY REDUCING ADMIXTURE ON THE PROPERTIES OF BINARY CEMENTITIOUS MATRIX CONCRETE

📄 Project Abstract

Conventional concrete is porous and the network of pores allow the passage of harmful substances through the concrete internal structure thereby causing damage to the internal structure of the concrete and which resulted in consequential loss of concrete durability. Efforts have been made to protect concrete but problem still exist such as in adequate protection and high cost of protection in view of the drawbacks this research work investigates effects of permeability reducing admixture on thedurability properties of binary cementitious matrix concrete.A total of 342 sample specimens of 100mmx100mmx100mm cubes were cast with the following connotations, 100% cement, 2% PRA, 10% C S A, 15% C S A, 2% PRA + 10% C S A and 2% PRA + 15% C S A, The permeability reducing admixture was purchased from Market, The coconut shell was pre ashed in an open air for one hour and was allowed to cool then calcined at temperature of 8000C in a kiln for 4hours and was allowed to cool to room temperature be...