The Effect of Using Linear Low Density Polyethylene (LLDPE) Powder and Rice Husk Asn on Compressive Strength and Intital Setting Time of Alkaline-Activated Mortar

Abstract

Fly Ash, Rice Husk Ash and Linear Low Density Polyethylene (LLDPE) Plastic Waste also contribute to environmental problems. Starting from the problem of CO2 emissions to ecosystem damage due to the accumulation of waste on the earth’s surface. Therefore, this study focuses on the use of Fly Ash, Rice husk ash and LLDPE Powder as a mixture of Alkaline-Activated Mortar. In this study, Fly Ash as a Pozzolanic Material mixed with Alkaline Activator Solution serves as a binder for Mortar. Rice husk ash is used as a substitute material for Fly ash while LLDPE powder functions as a substitute material for sand. The percentage of LLDPE powder used in the mortar mixture is from 0 to 15% of the total weight of the mixture. While the percentage of rice husk ash used in the mixture is 7%, Alkali Activator Solution 27% and Sand ranging from 24.5 to 39.5%. There are six variations of the mortar specimen (AAMP1, AAMP2, AAMP3, AAMP4, AAMP5, AAMP6). Initial setting time testing is done on binder mortar. The mortar compressive strength test was carried out at the age of 7 days after curing the oven at temperatures of 40°C and 60°C. From the test results obtained the highest compressive strength of 11.3 MPa on the AAMP6 test object with a curing temperature of 60°C where the percentage of LLDPE powder on the specimen is 15%. The core of the longest setting time is in the AAMP6 Alkaline-Activated Mortar binder variation, which is 180 minutes. The mortar compressive strength test was carried out at the age of 7 days after curing the oven at temperatures of 40°C and 60°C. From the test results obtained the highest compressive strength of 11.3 MPa on the AAMP6 test object with a curing temperature of 60°C where the percentage of LLDPE powder on the specimen is 15%. The core of the longest setting time is in the AAMP6 Alkaline-Activated Mortar binder variation, which is 180 minutes. The mortar compressive strength test was carried out at the age of 7 days after curing the oven at temperatures of 40°C and 60°C. From the test results obtained the highest compressive strength of 11.3 MPa on the AAMP6 test object with a curing temperature of 60°C where the percentage of LLDPE powder on the specimen is 15%. The core of the longest setting time is in the AAMP6 Alkaline-Activated Mortar binder variation, which is 180 minutes.