ORCID Profile
0000-0001-5531-8065
Current Organisation
UNSW@ADFA
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Publisher: MDPI AG
Date: 26-05-2023
DOI: 10.3390/MA16113993
Abstract: The construction industry is facing increased demand for adopting sustainable ‘green’ building materials to minimise the carbon footprint of the infrastructure sector to meet the United Nations 2030 Sustainability Goals. Natural bio-composite materials such as timber and bamboo have been widely used in construction for centuries. Hemp has also been used in different forms in the construction sector for decades for its thermal and acoustic insulation capability owing to its moisture buffering capacity and thermal conductivity. The current research aims to explore the possible application of hydrophilic hemp shives for assisting the internal curing of concrete materials as a biodegradable alternative to currently used chemical products. The properties of hemp have been assessed based on their water absorption and desorption properties associated with their characteristic sizes. It was observed that, in addition to its excellent moisture absorption capacity, hemp released most of its absorbed moisture into the surroundings under a high relative humidity ( %) the best outcome was observed for smaller hemp particles ( .36 mm). Furthermore, when compared to typical internal curing agents such as lightweight aggregates, hemp showed a similar behaviour in releasing its absorbed moisture to the surroundings indicating its potential application as a natural internal curing agent for concrete materials. An estimate of the volume of hemp shives required to provide a similar curing response to traditional internal curing techniques has been proposed.
Publisher: Elsevier BV
Date: 04-2011
Publisher: Informa UK Limited
Date: 26-06-2022
Publisher: Informa UK Limited
Date: 28-07-2022
Publisher: Japan Association for Wind Engineering
Date: 2006
Publisher: Elsevier BV
Date: 08-2020
Publisher: International Association for Bridge and Structural Engineering (IABSE)
Date: 2012
DOI: 10.2749/222137912805111096
Abstract: Post-tensioned composite steel-concrete slabs represent an economical form of construction for flooring systems. These consist of thin-walled profiled steel sheeting, post-tensioning strands, concrete and non-prestressed reinforcement. The particularity of this structural solution relies on the ability of the profiled steel sheeting to act as permanent formwork and, once the concrete has hardened, as external reinforcement. Unlike the case of steel reinforcing bars, which are cast in the concrete, the sheeting does not benefit from being totally embedded in the concrete. For this reason, the structural response significantly depends upon the interaction between the profiled steel sheeting and the concrete. In this context, this paper presents the experimental results of two series of tests carried out on six simply-supported post-tensioned composite s les at both service and ultimate conditions. The s les considered in this study have been cast using Stramit Condeck HP® and Stramit PrimeForm® steel decks. Standard material property tests are carried out on the concrete, steel decking and steel prestressing strands to determine their respective properties. Two analytical models were derived as part of this project to predict the response of the slabs at ultimate and service conditions, respectively. The former one is based on a rigid-plastic analysis and accounts for the partial shear connection behaviour of the composite slab system. The particularity of the long-term model relies on its ability to capture the non-uniform shrinkage profile produced by the lack of moisture egress from the underside of the slab due to the presence of the steel decking. Comparisons between the numerical and experimental results are carried out and briefly discussed. Further comparisons with experimental results are required to properly validate the adequacy of the proposed analytical models.
Publisher: Elsevier BV
Date: 2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: Thomas Telford Ltd.
Date: 09-2012
Abstract: Composite steel–concrete solutions are commonly used in Australia for floor building applications. In these situations secondary beams are usually connected to primary beams or columns by means of composite web side plate connections, also known as fin or single plate joints, with the slab continuous at the connection. The rigidity of this arrangement can lead to extensive cracking at the joint and to significant compressive forces in the web side plate connection, which can compromise one of the design limit states. In this context, this paper focuses on serviceability limit state and presents the results of two sets of experiments aimed at investigating how the time-dependent behaviour of the concrete affects the response of such joints. The first set included six simply supported specimens subjected to a sustained negative moment with the connection placed at their mid-span. These were used to study the behaviour of the negative moment region of a continuous floor beam in isolation. The second set consisted of a full-scale two-span continuous composite beam with the joint specified at the internal support. The long-term response of these composite members was monitored measuring the changes in deflection, end rotation, strain and slip occurring over time. Design considerations are provided at the end of the paper and it is envisaged that these new experimental data will be useful for the validation and benchmarking of analytical and numerical models.
Publisher: Elsevier BV
Date: 03-2018
Publisher: Elsevier BV
Date: 12-2019
Publisher: Elsevier BV
Date: 11-2017
Publisher: Elsevier BV
Date: 04-2020
Publisher: Elsevier BV
Date: 10-2018
Publisher: Elsevier BV
Date: 2011
Publisher: Elsevier BV
Date: 04-2017
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 09-2013
Publisher: Elsevier BV
Date: 03-2011
Publisher: Elsevier BV
Date: 10-2013
Publisher: Elsevier BV
Date: 05-2020
Publisher: Informa UK Limited
Date: 23-09-2022
Publisher: Elsevier BV
Date: 04-2018
Publisher: Elsevier BV
Date: 10-2011
Publisher: Springer Science and Business Media LLC
Date: 06-2015
No related grants have been discovered for Safat Al-Deen.