DURABILITAS LIGHTWEIGHT GEOPOLYMER CONCRETE TERHADAP LARUTAN HCL 5% DENGAN KONSENTRASI NAOH 14 M

RAMADHANTY, CINDY VIOLITA and Saloma, Saloma and Hanafiah, Hanafiah (2019) DURABILITAS LIGHTWEIGHT GEOPOLYMER CONCRETE TERHADAP LARUTAN HCL 5% DENGAN KONSENTRASI NAOH 14 M. Undergraduate thesis, Sriwijaya University.

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Abstract

Lightweight geopolymer concrete is an innovative concrete from a combination of environmentally friendly geopolymer concrete and lightweight concrete which has a specific gravity of less than 2,400 kg / m3. This concrete does not use Ordinary Portland Cement (OPC) but instead uses type F fly ash which has the same main composition as OPC namely silica and aluminum. Reducing the use of OPC aims to reduce the production of CO2 gas emissions which are the main contributors to global warming. The constituent materials of lightweight geopolymer concrete include type F fly ash as precursors, Na2SiO3 and NaOH 14 M as activators, fine aggregates in the form of sand as concrete fillers, superplaticizers, and foam. The use of foam helps in reducing the specific gravity of this concrete. The ratio used in this study is 1: 2 for activators and precursors, 1: 2 for precursors and fine aggregates, 2.5: 1 for Na2SiO3 and 14 M NaOH, 1:40 for foaming agents and water with a percentage of foam that is 50% of test object volume. The amount of platicizer used is 3% of the weight of the precursor. Treatment of the test object (curing) using an oven with a temperature of 60 ° C for 24 hours and then the specimen coated with plastic wrap for 28 days to achieve maximum compressive strength. The result of curing for 28 days is that the specimen has a compressive strength of 27.9 MPa with a specific gravity of 1,702.5 kg / m3. This research focuses on the durability of lightweight geopolymer concrete using 5% HCl acid solution under different conditions, which are left at room temperature, fully immersed in 5% HCl acid solution, and cyclic conditions. Tests carried out on days 28 and 56 with observations of changes in compressive strength, specific gravity, visual conditions, SEM (Scanning Electron Microscope), and XRD (X-Ray Diffraction). The results showed that the long duration and soaking conditions of acidic solutions, especially hydrochloric acid (HCl), affect lightweight geopolymer concrete.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	beton geopolimer ringan, durabilitas, geopolimer, dan serangan asam
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials > TA401.A327 Materials science
Divisions:	03-Faculty of Engineering > 22201-Civil Engineering (S1)
Depositing User:	Users 4295 not found.
Date Deposited:	14 Jan 2020 06:25
Last Modified:	14 Jan 2020 06:25
URI:	http://repository.unsri.ac.id/id/eprint/24035

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