The performance of polyurethane grout to stabilise hemic peat
Peat has always considered as a challenging ground for any form of construction due to its engineering characteristics such as high short-term settlement, prolonged long�term post construction settlement and high natural moisture content exceedingly more than 100%. Numerous construction material...
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my-uthm-ep.9082021-09-09T02:39:21Z The performance of polyurethane grout to stabilise hemic peat 2020-07 Abdurahman, Mohamad Niizar TH Building construction Peat has always considered as a challenging ground for any form of construction due to its engineering characteristics such as high short-term settlement, prolonged long�term post construction settlement and high natural moisture content exceedingly more than 100%. Numerous construction materials and methods have been developed in recent years for sustainable construction on peat. The polyurethane (PU) grouting as an option is similar to the cement base grouting application widely used for ground improvement. However, the PU grouting is a strong lightweight material with very short curing time. The Parit Nipah hemic peat has high natural moisture content (> 500%) with high initial void ratio (6.72-10.11) and compression index, cc between 3.17 to 4.57. Optimum mixing ratio for PU of 1:2 (polyol:isocyanate) was established to be used for PU grouting based on its compressive strength (>200 kPa) and curing time (<7 minutes). Numerical analysis was conducted by using PLAXIS 3D Foundation software to determine the boundary for laboratory and field models, as well to determine the grouting depth for PU. The depth of grouting for laboratory scale models were determined at 100 mm and 200 mm, while for the field scale models was at 1 m and 2 m deep. The settlement for natural and treated peat under embankment constructed in stages were monitored. The results of laboratory physical scale models and field models displayed similar settlement pattern. The PU grouted peat showed improvement in term of ground settlement compared to natural peat. PU grouting managed to reduce the settlement of peat up to 30% compared to natural peat. For the PU grouted peat, the increment in term of depth of grouting displayed better settlement improvement. Results showed that PU grouting has good potential to reduce the settlement of hemic peat. 2020-07 Thesis http://eprints.uthm.edu.my/908/ http://eprints.uthm.edu.my/908/1/24p%20MOHAMAD%20NIIZAR%20ABDURAHMAN.pdf text en public http://eprints.uthm.edu.my/908/2/MOHAMAD%20NIIZAR%20ABDURAHMAN%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/908/3/MOHAMAD%20NIIZAR%20ABDURAHMAN%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Awam dan Alam Bina |
| institution |
Universiti Tun Hussein Onn Malaysia |
| collection |
UTHM Institutional Repository |
| language |
English English English |
| topic |
TH Building construction |
| spellingShingle |
TH Building construction Abdurahman, Mohamad Niizar The performance of polyurethane grout to stabilise hemic peat |
| description |
Peat has always considered as a challenging ground for any form of construction due
to its engineering characteristics such as high short-term settlement, prolonged long�term post construction settlement and high natural moisture content exceedingly more
than 100%. Numerous construction materials and methods have been developed in
recent years for sustainable construction on peat. The polyurethane (PU) grouting as
an option is similar to the cement base grouting application widely used for ground
improvement. However, the PU grouting is a strong lightweight material with very
short curing time. The Parit Nipah hemic peat has high natural moisture content (>
500%) with high initial void ratio (6.72-10.11) and compression index, cc between 3.17
to 4.57. Optimum mixing ratio for PU of 1:2 (polyol:isocyanate) was established to be
used for PU grouting based on its compressive strength (>200 kPa) and curing time
(<7 minutes). Numerical analysis was conducted by using PLAXIS 3D Foundation
software to determine the boundary for laboratory and field models, as well to
determine the grouting depth for PU. The depth of grouting for laboratory scale models
were determined at 100 mm and 200 mm, while for the field scale models was at 1 m
and 2 m deep. The settlement for natural and treated peat under embankment
constructed in stages were monitored. The results of laboratory physical scale models
and field models displayed similar settlement pattern. The PU grouted peat showed
improvement in term of ground settlement compared to natural peat. PU grouting
managed to reduce the settlement of peat up to 30% compared to natural peat. For the
PU grouted peat, the increment in term of depth of grouting displayed better settlement
improvement. Results showed that PU grouting has good potential to reduce the
settlement of hemic peat. |
| format |
Thesis |
| qualification_name |
Doctor of Philosophy (PhD.) |
| qualification_level |
Doctorate |
| author |
Abdurahman, Mohamad Niizar |
| author_facet |
Abdurahman, Mohamad Niizar |
| author_sort |
Abdurahman, Mohamad Niizar |
| title |
The performance of polyurethane grout to stabilise hemic peat |
| title_short |
The performance of polyurethane grout to stabilise hemic peat |
| title_full |
The performance of polyurethane grout to stabilise hemic peat |
| title_fullStr |
The performance of polyurethane grout to stabilise hemic peat |
| title_full_unstemmed |
The performance of polyurethane grout to stabilise hemic peat |
| title_sort |
performance of polyurethane grout to stabilise hemic peat |
| granting_institution |
Universiti Tun Hussein Onn Malaysia |
| granting_department |
Fakulti Kejuruteraan Awam dan Alam Bina |
| publishDate |
2020 |
| url |
http://eprints.uthm.edu.my/908/1/24p%20MOHAMAD%20NIIZAR%20ABDURAHMAN.pdf http://eprints.uthm.edu.my/908/2/MOHAMAD%20NIIZAR%20ABDURAHMAN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/908/3/MOHAMAD%20NIIZAR%20ABDURAHMAN%20WATERMARK.pdf |
| _version_ |
1747830711115579392 |