Study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder

Study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder

The geopolymer then has been introduced by Joseph Davidovits as a new binder to replace the OPC. The current limitation of geopolymer concrete, it only can be produce in precast concrete industries. Ibis case study is conducted to find a retarder that can slow the reaction of geopolymer so it can be...

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Main Author: Mohd Sobri, Ibrahim
Format: Undergraduates Project Papers
Language:English
Published: 2012
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://umpir.ump.edu.my/id/eprint/13476/
http://umpir.ump.edu.my/id/eprint/13476/
http://umpir.ump.edu.my/id/eprint/13476/1/MOHD%20SOBRI%20IBRAHIM.pdf
id ump-13476
recordtype eprints
spelling ump-134762016-08-24T03:11:48Z http://umpir.ump.edu.my/id/eprint/13476/ Study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder Mohd Sobri, Ibrahim TA Engineering (General). Civil engineering (General) The geopolymer then has been introduced by Joseph Davidovits as a new binder to replace the OPC. The current limitation of geopolymer concrete, it only can be produce in precast concrete industries. Ibis case study is conducted to find a retarder that can slow the reaction of geopolymer so it can be transferred from mixture plant and can be cast in situ at site. Natural based retarders that proposed to use in this case study are sucrose and citric acid. The percentage ofretarder were used are 0%, 1.5% and 2.5%. Not only focusing on that matter, this case study also investigating about the strength of 50mm x 50mm x 50mm cube that has been exposed to different type curing condition, ambient and oven ( 60°). Compressive tests (ASTM Cl 09M) were conducted after I day, 7 day, 28 day and 56 day. Furthermore, flow table test (ASTM Cl437) also were conducted to measure the flow ability of fresh geopolymer mortar. After that, porosity test (ASTM C642) also were conducted to hardened geopolymer mortar to find out the percentage of porosity of the cube. Lastly, fresh geopolymer paste will undergo vicat test (ASTM C191) to measure the setting time of the paste. Total sample consist 140 hardened mortar and 5 fresh geopolyrner paste sample for vicat test. The result of compressive strength between 1.5% sucrose and control sample has shown no significant different, so the strength is as good as control sample. More retarder added to the geopolymer mortar, more it will affected the compressive strength. Increasing citric acid will only accelerate the reaction of geopolymer paste. On the other hand, increasing of sucrose will retarded and slow the reaction of geopolymer paste. 2012 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/13476/1/MOHD%20SOBRI%20IBRAHIM.pdf Mohd Sobri, Ibrahim (2012) Study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder. Faculty of Civil Engineering & Earth Resources, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:76434&theme=UMP2
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Mohd Sobri, Ibrahim
Study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder
description The geopolymer then has been introduced by Joseph Davidovits as a new binder to replace the OPC. The current limitation of geopolymer concrete, it only can be produce in precast concrete industries. Ibis case study is conducted to find a retarder that can slow the reaction of geopolymer so it can be transferred from mixture plant and can be cast in situ at site. Natural based retarders that proposed to use in this case study are sucrose and citric acid. The percentage ofretarder were used are 0%, 1.5% and 2.5%. Not only focusing on that matter, this case study also investigating about the strength of 50mm x 50mm x 50mm cube that has been exposed to different type curing condition, ambient and oven ( 60°). Compressive tests (ASTM Cl 09M) were conducted after I day, 7 day, 28 day and 56 day. Furthermore, flow table test (ASTM Cl437) also were conducted to measure the flow ability of fresh geopolymer mortar. After that, porosity test (ASTM C642) also were conducted to hardened geopolymer mortar to find out the percentage of porosity of the cube. Lastly, fresh geopolymer paste will undergo vicat test (ASTM C191) to measure the setting time of the paste. Total sample consist 140 hardened mortar and 5 fresh geopolyrner paste sample for vicat test. The result of compressive strength between 1.5% sucrose and control sample has shown no significant different, so the strength is as good as control sample. More retarder added to the geopolymer mortar, more it will affected the compressive strength. Increasing citric acid will only accelerate the reaction of geopolymer paste. On the other hand, increasing of sucrose will retarded and slow the reaction of geopolymer paste.
format Undergraduates Project Papers
author Mohd Sobri, Ibrahim
author_facet Mohd Sobri, Ibrahim
author_sort Mohd Sobri, Ibrahim
title Study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder
title_short Study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder
title_full Study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder
title_fullStr Study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder
title_full_unstemmed Study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder
title_sort study of fly ash based geopolymer mortar : citric acid and sucrose as proposed natural based retarder
publishDate 2012
url http://umpir.ump.edu.my/id/eprint/13476/
http://umpir.ump.edu.my/id/eprint/13476/
http://umpir.ump.edu.my/id/eprint/13476/1/MOHD%20SOBRI%20IBRAHIM.pdf
first_indexed 2023-09-18T22:16:10Z
last_indexed 2023-09-18T22:16:10Z
_version_ 1777415351426875392

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