Sugarcane bagasse ash (SCBA) has been reported to be beneficial as cement replacement
due to the pozzolanic and the filler effect. The SCBA from a high-efficiency (high
temperature) co-generation boiler does not contain significant amorphous silica rather it
contains α-quartz generated by phase transitions during combustion. The high combustion
temperatures appear to deactivate the silica, and lime-SCBA pastes show little or no
pozzolanic activity present, except at a 5% replacement. Compressive strength testing of the …

Bagasse ashes from high efficiency co-generation boilers have dominant filler effect in
concrete from a greatly reduced pozzolanic activity because of quartz polymorph phase
changes to α-quartz, rather than the often-reported α-cristobalite for bagasse derived silica.
Sugar cane bagasse ash used as filler in concretes provided substantial improvements to
compressive strengths at up to≈ 20%. These combined filler effect and limited pozzolanic
activity improved the acid resistance as measured by both mass loss and compressive …