jailcd2020104: Fundamental study on Coal Gasification Slag as a Fine Aggregate for concrete

Abstract

Coal Gasification Slag (CGS) is one of by-product from the Integrated Gasification Combined Cycle (IGCC) plant. Recently, the development of IGCC is progressing, and it is said that IGCC will increase remarkably within 15 or 20 years. For this reason, it is expected that the total amount of CGS will also increase significantly. However, there is few researches on CGS as a fine aggregate for concrete. In this study, therefore, fundamental experiment to obtain the necessary data for effective use of CGS are carried out. First, aggregate test to investigate the basic physical properties of CGS are conducted. As a result, it was confirmed that it would be sufficiently applicable as fine aggregate for concrete. Next, mortar and concrete tests to investigate the properties of concrete. From these test the following major results were obtained: 1)As the replacement ratio of CGS was increasing, the air content was gradually decreasing and the bleeding was gradually increasing. 2)The compressive strength of the concrete using CGS was equal to or large than that of not using CGS. 3)The drying shrinkage rate of the concrete using CGS was smaller than that of not using CGS.