Use of Municipal Solid Waste Incineration Bottom Ash and Rice Husk Ash as Blended Cement

Abstract

The issue related to disposing the waste material from the industries becomes one of a major problem to the environmental, economic, and social issue. However, natural resources consume worldwide, while at the same time increased amount and type of waste material has resulted in a waste disposal crisis with a growing consumer population. In this project, Municipal Solid Waste Incineration (MSWI) by-product which is bottom ash and rice husk ash were used as blended cement. This research paper is prepared to investigate the utilization of municipal solid waste incineration bottom ash in blended cement and designed for the strength of 15 MPa at 28 days will be evaluated for its early-stage properties. Rice husk ash is used to reduce the amount of cement in mortar and it helps to increase the durability of mortar while keeping up consistent workability. The percentage of replacement in cement is by 0% (control), (5% rice husk ash + 10% bottom ash), (10% rice husk ash + 10% bottom ash), and (15% rice husk ash + 10% bottom ash) The result of this research indicates that 5% of replacement of rice husk ash with 10% of bottom ash shows highest compressive strength with 17.79 MPa with density 2080 kg/mɜ and water absorption of 5.18% at 28 days. This study proved that the addition of bottom ash can increase the durability, workability, and strength of mortar containing rice husk ash as a replacement for cement.