Evaluation of Mechanical and Durability Properties of GGBS-Based High-Performance Concrete

Abstract

This is to study the possibility of improving conventional M40 concrete to high-performance one by adding 20% GGBS and a superplasticizer and to study whether addition of just one of the two to M40-level concrete is indeed enough to sustain M60 level as well as better durability. Methods Two concrete mixtures were formulated; a control M40 mix and an M40 mix with GGBS 20%. Both mixes were tested under standard laboratory test procedures in order to measure mechanical properties, stiffness, permeability and resistance to chemical attack. . Findings: The GGBS-modified concrete showed the same advance in the mechanical performance (strength and stiffness) and significant improvement in the durability properties. This was shown by a decrease in water permeability, chloride penetration, and acid and sulphate resistance. The findings reveal that a more dense and compact cementitious mix has been formed in comparison with the traditional mix. Novelty: The paper has shown that relative low replacement of 20 percent GGBS not including silica fume or complex tertiary supplementary cementitious systems is adequate to make M40 concrete a high-performance material. This method provides the feasible and cost-efficient route to the performance of M60 in construction.