Ayman Raouf - Academia.edu (original) (raw)

Papers by Ayman Raouf

International Conference on Sustainable Infrastructure 2019, 2019

Buildings, 2021

Design quality considers the extent to which the owner’s requirements are accurately synthesized ... more Design quality considers the extent to which the owner’s requirements are accurately synthesized into conformance specifications and drawings for the construction team to execute. Expected superior performance and sustainability of a green building require diligence in design to ensure its specifications are accurately stipulated. Several studies reported mismatches between expected and actual performances in green buildings that were attributed to poor design. This study thus revisits the design process and proposes a framework to map the quality activities in the project brief and design stages using the integration definition for function modeling (IDEFO) process. Semi-structured interviews and a focus group validated the framework and revealed issues in the current design practice that cause insufficient design solutions. Additionally, project delivery systems were discussed, with conditions for improving their suitability. This research contribution elucidates recommended quali...

Buildings, 2020

The quality performance of a green building will have an overarching effect on its objectives bec... more The quality performance of a green building will have an overarching effect on its objectives because of the high compliance needed to achieve superior performance expectations. Achieving sustainability objectives is challenging and requires the collaboration of diverse professionals that resume unique responsibilities. In this study, the different managerial practitioners involved in green-building projects were investigated in terms of their awareness levels regarding the quality performance measures, their perceived abilities to influence quality failure consequences, the degree to which the cost-of-quality (CoQ) of components can be evaluated, and the effect the sustainability traits have on the quality performance. Accordingly, a survey approach was adopted, and the results were analyzed using Pearson’s chi-squared (χ2) test, the relative importance index (RII), Mann–Whitney U-Test, and Student’s T-test. According to the results, the priorities of the different managerial types...

Energy Reports, 2019

The major environmental and economic burdens occurring from the high-energy consumption of buildi... more The major environmental and economic burdens occurring from the high-energy consumption of buildings led to energy performance being a critical aspect for green building rating systems. Building energy codes play an important role for such performances through establishing the baseline requirements to meet the rating system needs. Building information modeling (BIM) was used to model a concrete masonry unit (CMU) block wall with various insulation thicknesses assigned various insulation layer thicknesses depending on the insulation material property. Multiple scenarios were created in compliance with several energy codes and its different versions. The scenarios modeled were then analyzed using Life Cycle Assessment (LCA) to calibrate environmental performance of different energy codes used as baseline codes for different green building rating systems. The results indicate the differences between the various green building rating systems according to respective energy baseline codes and their versions adopted. Tendencies towards more efficient with less environmentally harmful buildings were observed. Comparing the different codes with the direct impact on the green building rating systems shows that rapid development in energy codes surpassed the impact resulted from adopting the green building rating systems. The amount of reduction in environmental impact was significantly and tangible due to change in the energy code. c

Journal of Construction Engineering and Management, 2019

AbstractThis paper presents an overview of the most recent works on project delivery systems, wit... more AbstractThis paper presents an overview of the most recent works on project delivery systems, with a particular interest in green buildings. The review focuses on current and prior studies that cri...

Architectural Engineering and Design Management, 2018

The advent of building information modelling (BIM) is revolutionising the conventional practices ... more The advent of building information modelling (BIM) is revolutionising the conventional practices of the construction industry and has reinforced the impact of the design process on the building project's overall life cycle. The industry is also moving towards sustainability through owners being committed to having green rated buildings and infrastructure. However, green buildings and their rating systems face several obstacles and shortcomings that hinder their sustainability. Several studies have considered BIM for sustainability aspects, but these were not connected directly with such obstacles. This paper is a literature review that links the obstacles and shortcomings faced in green buildings and their associated rating systems with the potential capabilities of BIM. The limitations of BIM in the green building industry was also addressed. The main obstacles and shortcomings faced are high upfront costs and delays, design complexities and documentation requirements, superior performance enhancement requirements, and skewness towards environmental sustainability. The paper was written from a realisation that a more consolidated future research direction is needed in academic studies that address the quest for sustainability though BIM. Findings indicate future areas of BIM technology research include fully automating BIM-rating system integration, collaboration and intellectual property issues, and the unaccommodating contractual approaches for multiple party involvement needed in a BIM platform.

International Journal of Civil Engineering, 2017

International Journal of Construction Management, 2020

Quality performance in construction is the degree of compliance with the specifications against w... more Quality performance in construction is the degree of compliance with the specifications against which the work was executed. Green buildings extend the compliance to sustainability-related aspects to ensure that the energy and water consumption is conserved, promote a healthy indoor environmental quality and reducing the detrimental impacts of the construction activities on the environment. The operational stage reflects the construction workmanship and the effectiveness of the design solution to achieve the sustainability requirements through the overall building performance. Procedures for maintenance and overhauling extend the longevity of buildings. Green buildings exhibit underperformance caused by inadequate construction practices and a lack of understanding of the operations and maintenance practices. This research serves to tackle this problem through a comprehensive and forward-looking framework to depict construction-and operation-related quality activities through an integrated definition for the function modeling (IDEF0) process model. Semi-structured interviews and a focus group validate the framework's suitability and its implementation offered revelations from industry practitioners on the factors affecting quality procedures from assigned metrics, liaison of staff from different project lifecycle stages, green building technologies, commissioning and retro-commissioning and impact of project delivery systems adopted especially in isolating operational liaison. The contributions of this work reinforce the impact of quality on the sustainability objectives that a green building is envisioned to serve, and through capturing the pre-, during, and post-construction lifecycle, the compliance and performance quality aspects are combined in a more integrated manner.

International Conference on Sustainable Infrastructure 2019

Energy piles offer a promising and eco-friendly technique to heat or cool buildings. Energy piles... more Energy piles offer a promising and eco-friendly technique to heat or cool buildings. Energy piles can be exploited as ground heat exchangers of a ground source heat pump system. In such application, the energy pile and its surrounding soil are subjected to temperature changes that could significantly affect the pile-soil interaction behaviour. The aim of this paper is to review the current state of knowledge on the design of energy piles in terms of the geostructural and heat exchanger functions. Furthermore, a conceptual understanding of the potential temperature effects on the mechanical behaviour of piles is proposed in this paper. Based on this conceptual understanding as well as the reported thermo-hydro-mechanical behaviour of saturated clays in the literature, the challenging geotechnical aspects facing the energy pile design are highlighted, and further research efforts to refine them are recommended. Ayman M.I. Raouf BE (Hons)