Performance of underside shaped concrete blocks for pavement

This study presents an innovative concrete block pavement (CBP) of rectangular blocks with grooves and web on the underside of the underside shaped concrete block (USCB). This new concrete block concept intends to address known causes of failure for CBP due to vertical, horizontal and repetitive tra...

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Main Author:	Mohamed, Azman
Format:	Thesis
Language:	English
Published:	2014
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/77868/1/AzmanMohamedPFKA2014.pdf
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id	my-utm-ep.77868
record_format	uketd_dc
spelling	my-utm-ep.778682018-07-23T05:46:01Z Performance of underside shaped concrete blocks for pavement 2014-05 Mohamed, Azman TA Engineering (General). Civil engineering (General) This study presents an innovative concrete block pavement (CBP) of rectangular blocks with grooves and web on the underside of the underside shaped concrete block (USCB). This new concrete block concept intends to address known causes of failure for CBP due to vertical, horizontal and repetitive traffic loading. Interaction between CBP and underlying bedding sand layer may lead to significant pavement deformation due to vertical traffic loading. The USCB provides an additional underside mechanical interlocking, compared with traditional rectangular concrete block. Twelve USCB with different groove depths (15 mm, 25 mm, and 35 mm) and four different bottom shapes (Shell – Rectangular (Shell–R), Trench Groove – Triangular (TG–T), Trench Groove – 2 Rectangular (TG–2R), and Trench Groove – 3 Rectangular (TG–3R)) were prepared. These USCB were mechanically tested to investigate the effects of groove depth, groove volume, and groove shape on their mechanical properties. To investigate their interlocking performance, a series of push-in loading test, pull-out loading test, horizontal loading test, and accelerated trafficking test were conducted using the Highway Accelerated Loading Instrument (HALI). A control pavement and with only stretcher bond laying pattern was built to allow for comparisons. The results indicate that triangular grooves exhibit promising compressive strength while rectangular grooves performed better in flexural, with the increase up to 25 % respectively when compared to control block. The optimum USCB groove depth is found at 15 mm and the Shell USCB has the best mechanical properties and resilience under all conditions due to their unique shape. The function of the grooves and web as spike has enhanced the mechanical properties of USCB and improved the interlocking mechanism between CBP and its underlying bedding sand layer. The study shows that USCB is a highly potential concrete block that could enhance pavement performance. 2014-05 Thesis http://eprints.utm.my/id/eprint/77868/ http://eprints.utm.my/id/eprint/77868/1/AzmanMohamedPFKA2014.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:98456 phd doctoral Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Mohamed, Azman Performance of underside shaped concrete blocks for pavement
description	This study presents an innovative concrete block pavement (CBP) of rectangular blocks with grooves and web on the underside of the underside shaped concrete block (USCB). This new concrete block concept intends to address known causes of failure for CBP due to vertical, horizontal and repetitive traffic loading. Interaction between CBP and underlying bedding sand layer may lead to significant pavement deformation due to vertical traffic loading. The USCB provides an additional underside mechanical interlocking, compared with traditional rectangular concrete block. Twelve USCB with different groove depths (15 mm, 25 mm, and 35 mm) and four different bottom shapes (Shell – Rectangular (Shell–R), Trench Groove – Triangular (TG–T), Trench Groove – 2 Rectangular (TG–2R), and Trench Groove – 3 Rectangular (TG–3R)) were prepared. These USCB were mechanically tested to investigate the effects of groove depth, groove volume, and groove shape on their mechanical properties. To investigate their interlocking performance, a series of push-in loading test, pull-out loading test, horizontal loading test, and accelerated trafficking test were conducted using the Highway Accelerated Loading Instrument (HALI). A control pavement and with only stretcher bond laying pattern was built to allow for comparisons. The results indicate that triangular grooves exhibit promising compressive strength while rectangular grooves performed better in flexural, with the increase up to 25 % respectively when compared to control block. The optimum USCB groove depth is found at 15 mm and the Shell USCB has the best mechanical properties and resilience under all conditions due to their unique shape. The function of the grooves and web as spike has enhanced the mechanical properties of USCB and improved the interlocking mechanism between CBP and its underlying bedding sand layer. The study shows that USCB is a highly potential concrete block that could enhance pavement performance.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Mohamed, Azman
author_facet	Mohamed, Azman
author_sort	Mohamed, Azman
title	Performance of underside shaped concrete blocks for pavement
title_short	Performance of underside shaped concrete blocks for pavement
title_full	Performance of underside shaped concrete blocks for pavement
title_fullStr	Performance of underside shaped concrete blocks for pavement
title_full_unstemmed	Performance of underside shaped concrete blocks for pavement
title_sort	performance of underside shaped concrete blocks for pavement
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2014
url	http://eprints.utm.my/id/eprint/77868/1/AzmanMohamedPFKA2014.pdf
_version_	1747817850740932608

Performance of underside shaped concrete blocks for pavement

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