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Showing papers in "International Journal of Sustainable Construction Engineering and Technology in 2018"


Journal ArticleDOI
TL;DR: In this paper, the authors verify the relationship between the supply chain performance (SCP) with three stakeholder management approaches, namely supplier relationship (SR), customer relationship (CR), and risk and reward sharing (RRS).
Abstract: Construction is dependent on accurate, timely and safe supply chain, otherwise whole project will be halted. Previously, it has found that most construction projects failed to complete on designated time that ultimately surges the cost as well. Although there are various approaches to deal with the situation, there is evidence that collaboration among stakeholders would reduce the risks and enhance the performance. Therefore, the aim of this study is to verify the relationship between the supply chain performance (SCP) with three stakeholder management approaches, namely supplier relationship (SR), customer relationship (CR), and risk and reward sharing (RRS). A total of 585 questionnaires were distributed using systematic probability sampling of listed construction organizations and only 258 responses were returned. The data were analyzed through the Smart PLS Software using two types of function i.e. PLS Algorithm and Bootstrapping. Based on the PLS Algorithm, the path coefficient results confirm that SR, CR, and RRS influence the SCP. It also has found that all three approaches have 56% of explaining power on SCP (R2 value = 0.560). The bootstrapping function revealed that the three hypotheses supported and this confirmed the hypotheses are true. This study enhances the relationship among stakeholders beyond the traditional collaboration to risk and reward sharing simultaneously. This integration will provide a competitive position as all members share their expertise that will ultimately improve the quality and lead time and enrich the flexibility. Thus, it can be concluded that long-term success is heavily dependent on relationships with the suppliers, customers, risk and reward sharing. This study will help construction managers to understand the importance of good relationships while doing strategic decision making.

20 citations


Journal ArticleDOI
TL;DR: In this article, the authors examined the perception of professionals on the impact of rework on the performance of both the project and the performing organization, and found that rework has a very high impact on project performance which results in projects over shooting their planned budget and planned duration.
Abstract: Rework has become a menace in the construction industry as it leads to undesired and unnecessary loss of efforts. It degrades project cost, quality and schedule performance, and it occurs at both the design and construction phases of construction projects. This study therefore examined the perception of construction professionals on the impact of rework on the performance of both the project and the performing organization. This was achieved by determining the most important effect of rework on project and organizational performance, and identifying variables in which the professionals view varies significantly. The study adopted a quantitative survey approach in which structured questionnaire was adopted as the research instrument. Mean item score was used in ranking the professionals perception of the effect of rework, and Kruskal-Wallis H test was used to identify the variables in which the professionals view varies. The study revealed that: rework has a very high impact of (MIS = 4.00) on project performance which results in projects over shooting their planned budget and planned duration, and degradation of project quality. Rework has a very high effect of (MIS = 4.04) on organizational performance leading to loss of profit/reduced profit, de-motivation of workers, and loss of future work/business. Disputes between contracted parties, design team dissatisfaction, de-motivation of workers and Fatigue are the factors in which the professionals’ view varied significantly. It was recommended that there is the need for the training of construction stakeholders on construction rework and other variables that cause projects to over shoot their budget, time and other resource.

15 citations


Journal ArticleDOI
TL;DR: In this paper, the authors present a survey on construction projects cost performance in Brazil with an analysis of cost overrun causes of the works based on the contractors' point of view after a literature review and field research, several causes were identified and evaluated by frequency, severity and importance through a questionnaire.
Abstract: This paper presents a survey on construction projects cost performance in Brazil with an analysis of cost overrun causes of the works based on the contractors’ point of view After a literature review and field research, several causes were identified and evaluated by frequency, severity, and importance through a questionnaire The field survey conducted included 11 directors, 17 project managers and 19 area managers of different construction companies Eighty-five causes of cost overrun were identified and classified in 11 departments with internal and external influences The research shows that 71% of the 238 contracts of the study have their costs exceeded, being 82% in amounts up to 25% of the initial agreement and 18% above 25% The most striking causes identified by the three parties were the change of scope, lack of design detail during budgeting, and high indirect cost in a period of low productivity

15 citations


Journal ArticleDOI
TL;DR: In this article, the authors used ground coal bottom ash (CBA) as a supplementary cementing material in concrete and found that the influence of CBA on concrete is obvious in density, water absorption, compressive and tensile strength.
Abstract: The coal based thermal power plant in Malaysia produces annually around 1.7 million tons of coal bottom ash (CBA) as a discarded material which poses great environmental problems. Hence, the objective of this study is to utilize ground CBA as a supplementary cementing material in concrete. The oven dried original CBA was grinded for 20hours to achieve required fineness. The mixture of concrete was prepared with CBA proportion of 10, 20 and 30% by weight of cement. For the evaluation of density, water absorption, compressive and tensile strength of concrete, 48 specimens were cast. The workability of fresh mix concrete was also evaluated, and it was found to be decreased as the quantity of CBA increased in the mixture. However, the compressive and splitting tensile strength of concrete was also reduced with the addition of ground CBA but with 10% replacement has attended the targeted compressive strength at the age of 28days. Besides that, it was also observed that the influence of CBA on concrete is obvious in density as well as in water absorption. The density of concrete gradually decreased due to addition of ground CBA, concrete containing 10% ground CBA was likely to be similar to that of control mix and the opposite performance was noticed in water absorption. Hence, experimental findings of this study indicated potentiality of ground CBA as supplementary cementing material in concrete construction which will reduces the environmental concern.

12 citations


Journal ArticleDOI
TL;DR: In this article, the use of Neem Seed Husk Ash (NSHA) as partial substitution for cement in concrete was investigated, and concrete was produced with 5, 10, 15, 20 and 25% by weight of NSHA substitution for ordinary Portland cement.
Abstract: The production of neem products from neem tree generates large quantity of waste annually. There is need to reduce environmental pollution resulting from neem seed covering. Therefore, the use of Neem Seed Husk Ash (NSHA) as partial substitution for cement in concrete was investigated. Neem seed husk was obtained from Bishop Smith Memorial College, Ilorin, Nigeria; sun – dried for 3 days and then calcined at 650o C. The calcined neem seed husk was ground and sieved using 200 μm sieve to obtain NSHA. Pozzolanicity test was conducted on NSHA to determine its chemical composition. Concrete was produced with 5, 10, 15, 20 and 25% by weight of NSHA substitution for ordinary Portland cement. Workability tests (slump and compacting factor) were performed on fresh concrete while compressive strength test was conducted on 150 mm cubes at ages 3, 7, 14, 21, 28, 56, 90 and 180 days for the hardened concrete. NSHA mainly comprises Al2O3, SiO2 and Fe2O3 with a combined percentage of 75.35%. The slump and compacting factors of NSHA concrete ranged from 5.50 mm to 10.00 mm and 0.91 to 0.95, respectively. The compressive strength at 180 days decreased from 26.9 N/mm2 to 19.4 N/mm2 as the NSHA content increased from 5% to 25%. Only 5% NSHA substitution is adequate to enjoy maximum benefit of strength gain.

6 citations


Journal ArticleDOI
TL;DR: In this article, the authors investigated the housing industry's key stakeholders' readiness factors with regards to the implementation of the green building concept and found that the most important competencies of the design team in designing green buildings are: knowledge relevant to green design; attention to green designing and construction details and offering suggestions to improve green design.
Abstract: The importance of having a sustainability agenda has stimulated greater interest for green construction. However, Malaysia is still moving at a slow pace in green building development as compared to other Asia Pacific countries. This paper focuses on investigating the housing industry’s key stakeholders’ readiness factors with regards to the implementation of the green building concept. The first aspect being the relative importance of the design teams’ competencies and commitment in designing green building projects; the second being the factors affecting developer’s decision to procure green buildings; and most importantly and thirdly, the readiness of the housing industry to implement green building development. A questionnaire survey data collection process was undertaken with ‘design consultants and architects’ for the first objective and ‘housing developers’ for the second and third objective. It was found that the most important competencies of the design team in designing green buildings are: knowledge relevant to green design; attention to green design and construction details and offering suggestions to improve green design. The key ‘commitment’ readiness factor identified is the commitment of the architect to produce green design. Whilst the key factors affecting clients’ decisions to procure green buildings are: experience on green buildings; clients’ knowledge on green buildings; commitment of client organizations to provide finance for green buildings; reliability and quality of specifications, and leadership skills and responsibility of constructor. Clearly, the readiness of the housing industry in the development of green buildings is not at a high level, with 41% of the respondents on average acknowledging that the readiness level of their companies is low.

6 citations


Journal ArticleDOI
TL;DR: In this article, the authors investigated the feasibility of improving the strength of recycled asphalt aggregate concrete in which reclaimed asphalt aggregate is used as a partial replacement of coarse aggregate at 30% and showed that this concrete has its potential to be used in pavement applications.
Abstract: The replacement of natural gravel aggregate with reclaimed asphalt as coarse aggregate would help in reduction of environmental and ecological effects. Researches were rarely performed by replacing fine aggregate in reclaimed asphalt pavement aggregate concrete. This project aims to investigate the feasibility of improving the strength of recycled asphalt aggregate concrete in which recycled asphalt aggregate is used as a partial replacement of coarse aggregate at 30%. Abrasion and attrition technique is used to modify or roughen the surface of RAP aggregates. Granite powder and copper slag are used as a partial replacement of sand at 5, 10, 15, 20 and 25% in Abrasion and attrition Treated Reclaimed Asphalt Pavement Aggregate Concrete (ABTRAPC). Thirty cubes, twenty cylinders and twenty beams of concrete with granite powder and thirty cubes, twenty cylinders and ten beams of concrete with copper slag were made and tested. The 7th and 28th day strengths were found out at these replacements. It was observed that the compressive strength, split tensile strength and flexural strength was found to be maximum at 15% replacement of sand by copper slag. The compressive strength was increased about 29.8% compared to ABTRAPC. Flexural strength similar to normal concrete and about 12.8% greater compared to ABTRAP concrete. The compressive strength and flexural strength was also increased to a maximum at 15% replacement of sand by granite powder and split tensile strength at 20% replacement of granite powder. The results showed that the potential of reclaimed asphalt aggregates as a partial replacement of coarse aggregates in concrete could be effectively enhanced with its a combination with granite powder or copper slag. The increase in compressive strength values and the increase in flexural strength values similar to normal concrete proved that this concrete has its potential to be used in pavement applications.

3 citations


Journal ArticleDOI
TL;DR: In this article, the authors present the findings of the assessment of sustainability in educational buildings in Nigeria from the stakeholders view point, which is a survey design approach was adopted and questionnaire was administered on construction participants in selected higher institutions.
Abstract: Building plays a vital role in the delivery of quality education. It is therefore necessary to provide not just buildings but sustainable ones, since educational buildings are meant to serve both the present generation and generations to come. This paper presents the findings of the assessment of sustainability in educational buildings in Nigeria from the stakeholders view point. A survey design approach was adopted and questionnaire was administered on construction participants in selected higher institutions. Data gathered were analyzed using percentage, relative importance index, and Kruskal-Walis H-test. The study revealed that sustainability in educational buildings in the country is on the average with the social dimension ranking a bit higher than the economic and environmental dimensions. There is also a significant divergence in the view of construction stakeholders as to the sustainability features of educational buildings. This divergence tends to affect the priority placed on sustainability as some critical sustainability features such as thermal, visual and acoustic comfort, needed for sustainable educational buildings were found to be very low. If this is to change, then more orientation of construction stakeholders as regards sustainability is needed. The study therefore recommends that educating construction participants, on the concept of sustainability is necessary in order to improve the understanding of sustainability among participants, and achieve sustainability in its holistic form. The study contributes to the body of knowledge as it brings to light the sustainability nature of educational buildings in the country from the stakeholders’ perspective; an aspect that has lacked research attention in the discussion of sustainable construction in the country. It is therefore believed that its findings will assist those responsible for the delivery of educational buildings across the country in delivering sustainable buildings for effective learning.

3 citations


Journal ArticleDOI
TL;DR: In this article, the authors presented a method for solving a contractor selection problem in an Indian housing development project using combination of analytic hierarchy process and zeros one integer linear programming for allocating housing construction works to contractors.
Abstract: The Indian construction industry forms an integral part of the economy and a conduit for a substantial part of its development investment, is poised for growth on account of urbanization, economic development and peoples rising expectations for improved quality of living. Housing construction is usually executed or coordinated by contractors who specialize in one type of construction such as residential or commercial building. The completion of housing projects within the projected time span has always been the most challenging task for the construction organizations and it is found that many construction projects have been unsuccessful in delivering the projects at time, cost and quality which the clients and their consultants had perceived before the starting of the project and thus, it is important for the management to efficiently design a plan of action to achieve the goals and requirements. To accomplish the requirements of construction planning, identifying and selection of an appropriate contractor for housing development is a crucial decision making process. The study presented a method for solving a contractor selection problem in an Indian housing development project using combination of analytic hierarchy process and zeros one integer linear programming for allocating housing construction works to contractors. The proposed integrated model will provide an encouraging result to select a contractor for a particular type of housing construction to fulfil the quality requirements and completion of project on time.

3 citations


Journal ArticleDOI
TL;DR: In this paper, a questionnaire survey was conducted with practitioners from contractor organizations and 111 valid responses were obtained, which indicated that only 50 influential factors were relevant in Malaysian construction project and these were categorised into 8 specific components namely: management, purchasing, expediting, transportation, site storage and condition, supplier, contractual and governmental interference.
Abstract: Construction projects are plagued with the issue of poor project performance such as low productivity, wastage, time overrun, compromised quality and cost overrun. Research literature reveals that this issue occurs partly due to ineffective materials management. Nonetheless, the effective management of materials seems like a viable solution to enhance the performance of any construction projects. Despite its importance, not much literature has explored the influential factors for effective management of materials. Since the identification of factors is an essential step to recommend any improvement efforts, thus, this paper examines the influential factors for effective materials management. A questionnaire survey was conducted with practitioners from contractor organisations and 111 valid responses were obtained. Data was analysed using exploratory factor analysis via the IBM SPSS version 21 software. Results indicate that only 50 influential factors were relevant in Malaysian construction project and these were categorised into 8 specific components namely: management, purchasing, expediting, transportation, site storage and condition, supplier, contractual and governmental interference. Summarily, findings reported in this paper constitute part of a questionnaire development process for a research project undertaken to develop an effective materials management model for better projects performance. Thus, the outcome of this study may assist practitioners in decision making process by understanding the identified influential factors that contribute to effective materials management.

2 citations


Journal ArticleDOI
TL;DR: In this paper, the authors evaluated factors influencing Saudi construction design management and suggested ways of improving the Saudi Construction Design Management management through the use of literature review, questionnaire and interview surveys, the study identified and assessed the factors influencing design management in Saudi Arabia.
Abstract: This study evaluates factors influencing Saudi construction design management. Through the use of literature review, questionnaire and interview surveys, the study identified and assessed the factors influencing design management in Saudi Arabia and suggested ways of improving the Saudi construction design management. The sample for the study was carefully selected with the use of purposive sampling technique. A total of one hundred and fifty questionnaires were administered online and of this number, fifty three respondents returned completed questionnaires. In addition, nine carefully sampled seasoned professionals were interviewed. Through the use of mean item score and content analysis for the interviews, the identified factors were assessed. The results obtained from descriptive analysis indicate that respondents ranked ‘effectiveness of communication channels and methods’ as the most important factor influencing design management in the study area. This was closely followed by ‘cultural differences’ and ‘deficient project documentations’. On ways to improve the Saudi construction design management, the respondents gave divergent views on the issue. Among the views expressed is that the government should ensure that the local consultants are well trained. The study recommends that the government should provide support for small and medium sized Saudi-based companies to integrate and collaborate with large foreign ones in order to work round the problem accruing from only foreign ones. This would further increase new innovative collaborative working.

Journal ArticleDOI
TL;DR: In this article, the roughness in the construction site surrounding condition and the pavement of the paths of the workzones makes a decrease in the efficiency in executive operation, which is one of the reasons for reducing the speed of operation and delay in that.
Abstract: The roughness in the construction site surrounding condition and the pavement of the paths of the workzones makes a decrease in the efficiency in executive operation. Increasing the rolling resistance due to the roughness, is one of the reasons for reducing the speed of operation and delay in that. In this study first, the fields of roughness appearance are recognized including inflation due to frost of subgrade and executive operations areas, then frost depth are calculated which is affected by the density conditions and moisture amount of workzone area’s surface. The different percentages of moisture 2, 5, 7, 15 and 20 and compaction ratio 100, 90, 75, 65 percent were considered in this study for density of workzones' top surface. Frost depth calculations are carried out in the US - Army method and by Pavem-Calc software. The results show that an increase in the density of 40 % is caused by a 25 % increase in frozen strain. Furthermore, the increase of 15 % of pavement moisture causes a 20 % increase in the frost depth and the increase of surface roughness. Statistical analyses were carried out to investigate the effectiveness of the research variables and the classification of results in the classification method of CART algorithm.