Research Proposal
RESEARCH PROPOSAL
THE STUDY ON DI-POTASSIUM HYDROGEN PHOSPHATE AND SODIUM NITRATE AS ALTERNATIVE ADMIXTURES IN FLY ASH BASED GEOPOLYMER.
By:
NOR HANIM BINTI KHIYON
Supervisor’s Name :
DR ANDRI KUSBIANTORO
1.0 INTRODUCTION
Geopolymer paste is created by combining fly ash, which contains alumino-silicate source, with a strong alkaline solution. Geopolymer concrete has significant advantages over standard concretes such as resistance to corrosion and fire, high compressive and tensile strengths and also less shrinkage. The development of geopolymer concrete is an important step towards the production of environmental friendly concretes. The purpose is apparently to reduce the carbon dioxide emission resulting from the production of Ordinary Portland Cement (OPC). The production of geopolymer concrete mostly relies on the curing time, curing temperature and the mixture composition of the chosen solid and also liquid components.
This study is concentrating on the investigation of alternative admixture proportions towards the compressive strength and setting time performance of fly ash based geopolymer binder. In general, the performance of fly ash based geopolymer binder is significantly affected by the rheological properties at the fresh state. Therefore, basic characteristic of these admixtures will indicate whether the admixture will be applicable as a retarder or accelerator in the production of fly ash based geopolymer binder.
1.1 PROBLEM STATEMENT
Fly ash based geopolymer binder is known for its low viscosity other than short setting time. This rapid formation of geopolymer framework will contribute to the early strength development; however workability performance will be significantly reduced. Therefore, with the addition of these chemical reagents to the geopolymer binder, it will help in identifying the suitable admixtures and also its dosage in order to increase the compressive strength and setting time
THE STUDY ON DI-POTASSIUM HYDROGEN PHOSPHATE AND SODIUM NITRATE AS ALTERNATIVE ADMIXTURES IN FLY ASH BASED GEOPOLYMER.
By:
NOR HANIM BINTI KHIYON
Supervisor’s Name :
DR ANDRI KUSBIANTORO
1.0 INTRODUCTION
Geopolymer paste is created by combining fly ash, which contains alumino-silicate source, with a strong alkaline solution. Geopolymer concrete has significant advantages over standard concretes such as resistance to corrosion and fire, high compressive and tensile strengths and also less shrinkage. The development of geopolymer concrete is an important step towards the production of environmental friendly concretes. The purpose is apparently to reduce the carbon dioxide emission resulting from the production of Ordinary Portland Cement (OPC). The production of geopolymer concrete mostly relies on the curing time, curing temperature and the mixture composition of the chosen solid and also liquid components.
This study is concentrating on the investigation of alternative admixture proportions towards the compressive strength and setting time performance of fly ash based geopolymer binder. In general, the performance of fly ash based geopolymer binder is significantly affected by the rheological properties at the fresh state. Therefore, basic characteristic of these admixtures will indicate whether the admixture will be applicable as a retarder or accelerator in the production of fly ash based geopolymer binder.
1.1 PROBLEM STATEMENT
Fly ash based geopolymer binder is known for its low viscosity other than short setting time. This rapid formation of geopolymer framework will contribute to the early strength development; however workability performance will be significantly reduced. Therefore, with the addition of these chemical reagents to the geopolymer binder, it will help in identifying the suitable admixtures and also its dosage in order to increase the compressive strength and setting time
References: i. R. Meij and H. te Winkel. (2001). "Health aspects of coal fly ash." University of Kentucky. [Online Research Paper]. Available: http://www.flyash.info/2001/keynote/21meij.pdf ii. Z. Li and Y. Zhang. "DEVELOPMENT OF SUSTAINABLE CEMENTITIOUS MATERIALS." Hong Kong University of Science and Technology. [Online]. Available: http://constructionz.com/articles/development-of-sustainable-cementitious-materials.html iii. D. Hopey. (2011, February 2). “Report says fly ash sites leak chromium into water.” Pittsburgh Post-Gazette. [Online Article]. Available: http://www.post-gazette.com/pg/11033/1122250-455.stm iv. D. Hardjito, S. Wallah, D. Sumajouw, and B. Rangan. (2004, December). "On the Development of Fly Ash-Based Geopolymer Concrete." ACI Materials Journal. [Online Research Paper]. Available: http://fportfolio.petra.ac.id/user_files/10-002/On%20the%20Development%20of%20Fly%20Ash-based%20Geopolymer%20Concrete.pdf