Abstract
This study studied the utilization of Bagasse-Rice Husk-Wood Ash (BRWA) as an additive for improving the strength and durability of coarse Fly Ash (FA) concrete. The ground BRWA was used as an additive for maintaining the consistent slump of FA concrete. The strength, chloride permeability and corrosion resistance were investigated. The chloride permeability of concrete was evaluated using the measurement of coulomb charge as per ASTM C1202 and the corrosion resistance was detected using the Accelerated Corrosion test by Impressed Voltage (ACTIV). The test indicated that the incorporation of ground BRWA as an additive in FA concrete improved potentially both the strength and corrosion resistance, particularly the concrete containing up to 40% FA. While the 60% FA concrete with ground BRWA additive improved significantly in strength, the resistance to corrosion was insignificantly improved. The results showed that the use of ground BRWA as an additive was one approach for its utilization in concrete beyond use as pozzolan. The increase in the use of BRWA in concrete could reduce costs and minimize the environmental problems as well.
Highlights
This study studied the utilization of Bagasse-Rice Husk-Wood Ash (BRWA) as an additive for improving the strength and durability of coarse Fly Ash (FA) concrete
The test indicated that the incorporation of ground BRWA as an additive in FA concrete improved potentially both the strength and corrosion resistance, the concrete containing up to 40% FA
The results showed that the use of ground BRWA as an additive was one approach for its utilization in concrete beyond use as pozzolan
Summary
This results in a higher water reinforced steel corrosion in concrete structures. The low development of strength at an early age is a disadvantage of FA blended cement concrete, especially the cement replacements with a high amount of FA and/or coarse FA (Naik and Ramme, 1990; Gopalan, 1993; Erdogdu and Turker, 1998; Paya et al, 1995; Lia and Wu, 2005) In recent decades, their disadvantages have been improved by using ternary blended cement, which is combination of Portland Cement (PC), FA and other supplementary cementitious materials, namely, Silica Fume (SF), Rice Husk Ash (RHA), or Metakaolin (MK). The use of ternary blended PC, FA and MK, or PC, FA and RHA results in an increase in strength and durability of the concrete (Wei et al, 2007; Shi et al, 2011; Mehta, 1988; Isaia, 1999; Bhanumathidas and Mehta, 2001)
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