A Study on the Applicability of Dry Bottom Ash as a Fine Aggregate for Lightweight Aggregate Concrete.pdf

Sangchul Shin, Korea, Republic of - Eco-friendly Concrete Research Center, Kongju National University
Jinman Kim, Korea, Republic of - Department of Green Smart Architectural Engineering, Kongju National University

Description

A Study on the Applicability of Dry Bottom Ash as a Fine Aggregate for Lightweight Aggregate Concrete Authors Dr. Sangchul Shin - Korea, Republic of - Eco-friendly Concrete Research Center, Kongju National University Dr. Jinman Kim - Korea, Republic of - Department of Green Smart Architectural Engineering, Kongju National University Dr. Hoonsik Hong - Korea, Republic of - Korea Power plant Byproduct Recycling Association Abstract 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 ottom 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 mixure, 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.

 
May 15th, 10:30 AM May 15th, 11:00 AM

A Study on the Applicability of Dry Bottom Ash as a Fine Aggregate for Lightweight Aggregate Concrete.pdf

Grand Rapids, Michigan

A Study on the Applicability of Dry Bottom Ash as a Fine Aggregate for Lightweight Aggregate Concrete Authors Dr. Sangchul Shin - Korea, Republic of - Eco-friendly Concrete Research Center, Kongju National University Dr. Jinman Kim - Korea, Republic of - Department of Green Smart Architectural Engineering, Kongju National University Dr. Hoonsik Hong - Korea, Republic of - Korea Power plant Byproduct Recycling Association Abstract 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 ottom 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 mixure, 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.