EFFECT OF PARTIAL REPLACEMENT OF CEMENT WITH SILICA
FUME ON THE STRENGTH AND DURABILITY CHARACTERISTICS
OF HIGH PERFORMANCE CONCRETE
29th Our World in Concrete and Structures (OWICs) - 2004
K. Perumal*, Sri Ramakrishna Mission Vidyalaya Polytechnic College, India
R. Sundararajan, Government College of Technology, India
High performance concrete (HPC), strength and durability, silica fume (SF),
replacement of cement, Superplasticizer, water-binder ratio
Maintenance, repair and rehabilitation of existing cement concrete structures involve a lot of
problem leading to significant expenditure. In the recent past, there has been considerable attention
for improving the properties of concrete with respect to strength and durability, especially in aggressive environments .High performance concrete (HPC) appears to be better choice for a strong and durable structure. Suitable addition of mineral admixtures such as silica fume (SF), ground granulated blast furnace slag and fly ash in concrete improves the strength and durability of concrete due to considerable improvement in the microstructure of concrete composites, e specially at the transition zone Very few studies have been reported in India on the use of SF for development of HPC and also durability characteristics of these mixes have not been reported . In order to make a quantitative assessment of different cement replacement levels with SF on the strength and durability properties for M60, M70 and M11 0 grades of HPC trial mixes and to arrive at the maximum levels of replacementof cement with SF, investigations were taken .
This paper reports on the performance of HPC trial mixes having different replacement levels of
cement with SF. The strength and durability characteristics of these mixes are compared with the
mixes without SF. Compressive strengths of 60 MPa, 70 MPa and 110 MPa at 28days were obtained
by using 10 percent replacement of cement with SF. The results also show that the SF concretes
possess superior durability properties.