KAJIAN KEKUATAN TEKAN DAN POROSITAS SERTA KARAKTERISASI PADA MORTAR GEOPOLIMER BERBASIS FLY ASH KELAS C

• Main Author: Nadya Anggraini, Astrid
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/40651
• Institution: Institut Teknologi Bandung

Nowadays, efforts to increase the use of fly ash as an alternative material for ordinary Portland cement (OPC) concrete has shown a significant result. Either geopolymer concrete or geopolymer mortar does not need Portland cement as a binder, but using the mixture of fly ash and the alkali activator solution. Moreover, the utilization of fly ash for geopolymer material will be more environmentally friendly because it reduces carbon dioxide emission in cement production, and the production cost is relatively lower than OPC concrete?s because of the use of byproduct material. This final project examines the effect of the use of fly ash class C to geopolymer mortar in terms of the compressive strength and the resulting porosity. Based on the literature, the enhancement of compressive strength and porosity is affected by the molarity of sodium hydroxide (NaOH), the amount of fly ash class C and sand as a fine aggregate, the amount of water glass which is dissolved to NaOH to form the alkali activator solution, and the curing temperature. The correlation between the compressive strength and porosity fromthe sample can be seen in the correlation graph. The high strength is resulted by the sample with the ratio mixture of H/NSA with NaOH solution 12 M in the amount of 61.45 MPa. The characterization of the sample is done to find out the geopolymer bonds on the sample, and the compound that is formed on the sample. Keywords : Geopolymer, Polimerisation reaction, Fly ash class C, Alkali activator solution, Mix design, Porosity, X-ray diffraction characterization, Fourier transform infrared spectroscopy characterization.