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Study of silica gel as self-healing agent in ordinary portland cement (OPC) mortar exposed to extremely high temperatures

The study was conducted to investigate the effect of silica gel on the behaviour of Ordinary Portland Cement (OPC) mortar as self-healing material after exposed to extremely high temperature. An attempt has been made to define whether the spherical silica gel can carry out the healing mechanisms aft...

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Main Author: Lim, Syh Ho
Format: Undergraduates Project Papers
Language:English
Published: 2015
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://umpir.ump.edu.my/id/eprint/12094/1/FKKSA%20-%20LIM%20SYH%20HO%20%28CD9274%29.pdf
http://umpir.ump.edu.my/id/eprint/12094/
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spelling my.ump.umpir.120942022-01-18T14:54:12Z http://umpir.ump.edu.my/id/eprint/12094/ Study of silica gel as self-healing agent in ordinary portland cement (OPC) mortar exposed to extremely high temperatures Lim, Syh Ho TA Engineering (General). Civil engineering (General) The study was conducted to investigate the effect of silica gel on the behaviour of Ordinary Portland Cement (OPC) mortar as self-healing material after exposed to extremely high temperature. An attempt has been made to define whether the spherical silica gel can carry out the healing mechanisms after put into the furnace and burn under extremely high temperature (500˚C, 600˚C and 700˚C). Three same dosages of silica gel (1% by weight of OPC) in the mortar mix were applied. There were other three sets of mortar mix without silica gel that were prepared to act as control specimen. Mortar properties after 3 days, 28 days, and exposure to extremely high temperature were conducted to study the compressive strength and its porosity. In order to determine its mechanical properties, 45 cubes (50 mm) with silica gel and another 45 cubes (50 mm) without silica gel were cast. All cubes specimens were tested until failure in compression machine. Based on the experimental results, silica gel will start to be activated after reacted with water (for day 3), which had almost similar strength with control cubes. However, in elevated temperature exposure, the compressive strength of cubes with silica gel is not influenced by the silica gel contribution once the temperature was elevated beyond 500 ˚C. The expansion of silica gel was believed to lead to the crack occurrence and decreased the strength of mortar cube. The percentage of porosity for OPC mortar with silica gel are much higher than the control cubes, means that it is more permeable than those control cubes due to the expansion development of the silica gel as the crack observed on mortar’s surface was happened at the interfacial transition zone between silica gel and cement matrix. Conclusively, the results revealed that silica gel only give significant effect to the compressive strength at day 3 and at 500˚C heating temperature 2015-06 Undergraduates Project Papers NonPeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/12094/1/FKKSA%20-%20LIM%20SYH%20HO%20%28CD9274%29.pdf Lim, Syh Ho (2015) Study of silica gel as self-healing agent in ordinary portland cement (OPC) mortar exposed to extremely high temperatures. Faculty of Civil Engineering & Earth Resources, Universiti Malaysia Pahang.
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Lim, Syh Ho
Study of silica gel as self-healing agent in ordinary portland cement (OPC) mortar exposed to extremely high temperatures
description The study was conducted to investigate the effect of silica gel on the behaviour of Ordinary Portland Cement (OPC) mortar as self-healing material after exposed to extremely high temperature. An attempt has been made to define whether the spherical silica gel can carry out the healing mechanisms after put into the furnace and burn under extremely high temperature (500˚C, 600˚C and 700˚C). Three same dosages of silica gel (1% by weight of OPC) in the mortar mix were applied. There were other three sets of mortar mix without silica gel that were prepared to act as control specimen. Mortar properties after 3 days, 28 days, and exposure to extremely high temperature were conducted to study the compressive strength and its porosity. In order to determine its mechanical properties, 45 cubes (50 mm) with silica gel and another 45 cubes (50 mm) without silica gel were cast. All cubes specimens were tested until failure in compression machine. Based on the experimental results, silica gel will start to be activated after reacted with water (for day 3), which had almost similar strength with control cubes. However, in elevated temperature exposure, the compressive strength of cubes with silica gel is not influenced by the silica gel contribution once the temperature was elevated beyond 500 ˚C. The expansion of silica gel was believed to lead to the crack occurrence and decreased the strength of mortar cube. The percentage of porosity for OPC mortar with silica gel are much higher than the control cubes, means that it is more permeable than those control cubes due to the expansion development of the silica gel as the crack observed on mortar’s surface was happened at the interfacial transition zone between silica gel and cement matrix. Conclusively, the results revealed that silica gel only give significant effect to the compressive strength at day 3 and at 500˚C heating temperature
format Undergraduates Project Papers
author Lim, Syh Ho
author_facet Lim, Syh Ho
author_sort Lim, Syh Ho
title Study of silica gel as self-healing agent in ordinary portland cement (OPC) mortar exposed to extremely high temperatures
title_short Study of silica gel as self-healing agent in ordinary portland cement (OPC) mortar exposed to extremely high temperatures
title_full Study of silica gel as self-healing agent in ordinary portland cement (OPC) mortar exposed to extremely high temperatures
title_fullStr Study of silica gel as self-healing agent in ordinary portland cement (OPC) mortar exposed to extremely high temperatures
title_full_unstemmed Study of silica gel as self-healing agent in ordinary portland cement (OPC) mortar exposed to extremely high temperatures
title_sort study of silica gel as self-healing agent in ordinary portland cement (opc) mortar exposed to extremely high temperatures
publishDate 2015
url http://umpir.ump.edu.my/id/eprint/12094/1/FKKSA%20-%20LIM%20SYH%20HO%20%28CD9274%29.pdf
http://umpir.ump.edu.my/id/eprint/12094/
_version_ 1724073454767964160
score 13.211869

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