Design, processing and properties of fly ash-based lightweight geopolymer using foaming agent for brick application

Lightweight concrete reduces the overall self-weight of the structures resulting in the reduction of the foundation size, cost, and other specification. However, the conventional lightweight concrete production causes several environmental impacts and produce low mechanical properties, so there is...

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Format:	Thesis
Language:	English
Subjects:	Fly Ash Polymerization Polymer-impregnated concrete Lightweight concrete Bricks Geopolymer
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78806/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78806/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78806/3/Wan%20Mastura.pdf
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spelling	my-unimap-788062023-05-23T08:59:04Z Design, processing and properties of fly ash-based lightweight geopolymer using foaming agent for brick application Kamarudin, Hussin, Brig. Jen. Datuk Prof. Emeritus Dr. Lightweight concrete reduces the overall self-weight of the structures resulting in the reduction of the foundation size, cost, and other specification. However, the conventional lightweight concrete production causes several environmental impacts and produce low mechanical properties, so there is a clear need of searching and replacing for more efficient and durable alternatives beyond the limitations of the conventional lightweight concrete. Geopolymer represents a great opportunity to ensure greater sustainability in the construction industry especially for the use of industrial waste such as fly ash. This research focuses on the preparation of fly ash-based lightweight geopolymer using superplasticizer as foaming agent. The superplasticizer (Polyoxyethylene alkyether sulfate) was prepared using pre-formed method by combination with water and air pressure. The effects of geopolymeric synthesis parameters such as the NaOH concentration (6 M, 8 M, 10 M, 12 M and 14 M), ratio of foaming agent to water (1/10, 1/20, 1/30 and 1/40) by volume, ratio of foam to geopolymer paste (0.5, 1.0, 1.5 and 2.0) by volume, curing temperature (40 °C, 60 °C, 80 °C and 100 °C) and curing time (6, 12, 24 and 48) hours on the lightweight geopolymer paste that affect the mechanical and microstructure properties were studied in detailed. The compressive strength, water absorption, density, were studied to determine the mechanical properties of lightweight geopolymer. The thermal insulation properties was investigated through the effects of thermal conductivity, thermal diffusivity, and specific heat of lightweight geopolymer at different ageing time (3, 7, 28, 60 and 90) days. The microstructure properties of lightweight geopolymer were tested by using Scanning Electron Microscope. The results indicated that the lightweight geopolymer have an optimum NaOH concentration of 12 M, with highest compressive strength of 15.2 MPa at 7 days, an optimum ratio of foaming agent to water (1/10) and ratio of foam to geopolymer paste (1.0) with highest strength of 16.6 MPa (7 days), optimum curing temperature (80 °C) and curing time (24 hours) showed the highest strength and lowest density of 15.6 MPa and 1400 kg/m3, respectively. The thermal conductivity and thermal diffusivity of lightweight geopolymer are substantially lower with value of 0.63 W/mK to 0.83 W/mk and 0.26 mm2/s to 0.35 mm2/s, respectively. A potential new lightweight construction material can be produced by using low cost of foaming agent and easy to process for addition to geopolymer paste. The fly ash-based lightweight geopolymer produced in this work exhibit compressive strength in accordance to the standard for masonry lightweight applications at considerably lower curing temperature (80 °C). Universiti Malaysia Perlis (UniMAP) Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/78806 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78806/4/license.txt 8a4605be74aa9ea9d79846c1fba20a33 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78806/1/Page%201-24.pdf 744eeefadb8cd51639d5d43ef2d2d7fe http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78806/2/Full%20text.pdf 5d7823ae386b56b07e03c7ede9faacfb http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78806/3/Wan%20Mastura.pdf 64015ee986d31a0d422f2f8a440f36a2 Universiti Malaysia Perlis (UniMAP) Fly Ash Polymerization Polymer-impregnated concrete Lightweight concrete Bricks Geopolymer School of Materials Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Kamarudin, Hussin, Brig. Jen. Datuk Prof. Emeritus Dr.
topic	Fly Ash Polymerization Polymer-impregnated concrete Lightweight concrete Bricks Geopolymer
spellingShingle	Fly Ash Polymerization Polymer-impregnated concrete Lightweight concrete Bricks Geopolymer Design, processing and properties of fly ash-based lightweight geopolymer using foaming agent for brick application
description	Lightweight concrete reduces the overall self-weight of the structures resulting in the reduction of the foundation size, cost, and other specification. However, the conventional lightweight concrete production causes several environmental impacts and produce low mechanical properties, so there is a clear need of searching and replacing for more efficient and durable alternatives beyond the limitations of the conventional lightweight concrete. Geopolymer represents a great opportunity to ensure greater sustainability in the construction industry especially for the use of industrial waste such as fly ash. This research focuses on the preparation of fly ash-based lightweight geopolymer using superplasticizer as foaming agent. The superplasticizer (Polyoxyethylene alkyether sulfate) was prepared using pre-formed method by combination with water and air pressure. The effects of geopolymeric synthesis parameters such as the NaOH concentration (6 M, 8 M, 10 M, 12 M and 14 M), ratio of foaming agent to water (1/10, 1/20, 1/30 and 1/40) by volume, ratio of foam to geopolymer paste (0.5, 1.0, 1.5 and 2.0) by volume, curing temperature (40 °C, 60 °C, 80 °C and 100 °C) and curing time (6, 12, 24 and 48) hours on the lightweight geopolymer paste that affect the mechanical and microstructure properties were studied in detailed. The compressive strength, water absorption, density, were studied to determine the mechanical properties of lightweight geopolymer. The thermal insulation properties was investigated through the effects of thermal conductivity, thermal diffusivity, and specific heat of lightweight geopolymer at different ageing time (3, 7, 28, 60 and 90) days. The microstructure properties of lightweight geopolymer were tested by using Scanning Electron Microscope. The results indicated that the lightweight geopolymer have an optimum NaOH concentration of 12 M, with highest compressive strength of 15.2 MPa at 7 days, an optimum ratio of foaming agent to water (1/10) and ratio of foam to geopolymer paste (1.0) with highest strength of 16.6 MPa (7 days), optimum curing temperature (80 °C) and curing time (24 hours) showed the highest strength and lowest density of 15.6 MPa and 1400 kg/m3, respectively. The thermal conductivity and thermal diffusivity of lightweight geopolymer are substantially lower with value of 0.63 W/mK to 0.83 W/mk and 0.26 mm2/s to 0.35 mm2/s, respectively. A potential new lightweight construction material can be produced by using low cost of foaming agent and easy to process for addition to geopolymer paste. The fly ash-based lightweight geopolymer produced in this work exhibit compressive strength in accordance to the standard for masonry lightweight applications at considerably lower curing temperature (80 °C).
format	Thesis
title	Design, processing and properties of fly ash-based lightweight geopolymer using foaming agent for brick application
title_short	Design, processing and properties of fly ash-based lightweight geopolymer using foaming agent for brick application
title_full	Design, processing and properties of fly ash-based lightweight geopolymer using foaming agent for brick application
title_fullStr	Design, processing and properties of fly ash-based lightweight geopolymer using foaming agent for brick application
title_full_unstemmed	Design, processing and properties of fly ash-based lightweight geopolymer using foaming agent for brick application
title_sort	design, processing and properties of fly ash-based lightweight geopolymer using foaming agent for brick application
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Materials Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78806/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78806/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/78806/3/Wan%20Mastura.pdf
_version_	1776104289942372352

Design, processing and properties of fly ash-based lightweight geopolymer using foaming agent for brick application

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