Location
Grand Rapids, Michigan
Start Date
15-5-2024 10:30 AM
End Date
15-5-2024 11:00 AM
Description
While wet bottom ash has been used as a lightweight aggregate for a long time, Research on a dry bottom ash emitted from thermal power plants is insufficient. Dry bottom ash has the potential to be used as an excellent lightweight aggregate in the field of construction materials. This study was performed to verify the applicability of dry bottom ash as a fine aggregate in lightweight aggregate concrete. As a result of the study, it was found that the slump loss was not significant up to 75% of the dry bottom ash replacement rate, and the use of dry bottom ash did not affect the air content of lightweight aggregate concrete. The amount of concrete bleeding was less than 0.025 cm3/cm2 at 75% under of the replacement rate of dry bottom ash, and the compressive strength was 90% or more compared to the plane specimen up to 75% of the replacement rate. In addition, the dry shrinkage of concrete was similar to that of plane mixture, and it was confirmed that the elastic modulus did not decrease up to 50% of the dry bottom ash replacement rate. Therefore, it was confirmed that it is an effective method to use partially dry bottom ash as a fine aggregate of lightweight aggregate concrete.
Document Type
Event
Paper_A Study on the Applicability of Dry Bottom Ash as a Fine Aggregate for Lightweight Aggregate Concrete
Grand Rapids, Michigan
While wet bottom ash has been used as a lightweight aggregate for a long time, Research on a dry bottom ash emitted from thermal power plants is insufficient. Dry bottom ash has the potential to be used as an excellent lightweight aggregate in the field of construction materials. This study was performed to verify the applicability of dry bottom ash as a fine aggregate in lightweight aggregate concrete. As a result of the study, it was found that the slump loss was not significant up to 75% of the dry bottom ash replacement rate, and the use of dry bottom ash did not affect the air content of lightweight aggregate concrete. The amount of concrete bleeding was less than 0.025 cm3/cm2 at 75% under of the replacement rate of dry bottom ash, and the compressive strength was 90% or more compared to the plane specimen up to 75% of the replacement rate. In addition, the dry shrinkage of concrete was similar to that of plane mixture, and it was confirmed that the elastic modulus did not decrease up to 50% of the dry bottom ash replacement rate. Therefore, it was confirmed that it is an effective method to use partially dry bottom ash as a fine aggregate of lightweight aggregate concrete.
