Appraisal of Construction Cost Overruns In The Public And Private Sectors In Nigeria
Nwabueze Michael Anosike and Emmanuel Ojo Fatoye
The construction industry is a highly dynamic sector and an important player in the development of any nation. Hence it is essential to ensure that the construction projects are completed successfully in time, within budget and with expected quality. This research aims to compare the trend of cost overruns in the public and private construction projects using Lagos State, Nigeria as a case study. The objective is to provide knowledge that will enhance effective project delivery in both public and private sectors. The study was carried out using the cross-sectional design and adopted the quantitative research method. A questionnaire was administered to 130 sampled professionals and clients out of which 92 respondents duly completed and returned, representing 71% response rate for the analysis.The study revealed that cost overruns in the public sector projects were 19.14% on average and 19.63% in the private sector. TheT-test results revealed that there was no significant difference in the mean values of percentage of cost overruns in the public and private sector projects respectively. Some of the most important causes of cost overruns in the public and private sectors are additional work, poor project management, contract administration, inflation and high interest rates on construction materials. As a measure against cost overruns, this study advocates the need for properly defined project scope from inception.
Cost overrun; Public Sector; Construction; Projects; Nigeria
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Research Articles
A Case Study On Implementing NAVFAC P-405 At Indian Construction Sites For Estimating Time And Cost Overruns
Safeer Ali Abbas Ali , Arun C. and Krishnamurthy K
Delays and cost overruns should be drastically reduced at construction sites. It requires investigation in the current practice with regard to the planning stage. This paper gives an introduction to the US Naval handbook for planning and estimation, NAVFAC P-405; discusses its merits and explains the need for extrapolating its current use, from a private code of US navy, to a global audience of construction practitioners.The term 'platform independence' in provisions of code is introduced. It is seen that this particular code is a platform independence-compatible code, paving the way for its extended use worldwide. Further, a method to calculate overruns in a single activity using NAVFAC-405 is explained with a live example from a site. A study of an Indian construction site is done and data regarding time/cost overruns are calculated based on this code. It is expected that implementing this code would bring uniformity and standardize overruns, paving the way for proposing proper mitigation measures for overruns, which are a long overdue in the construction industry
Carbon Footprint And Clean Development Mechanism (CDM) Framework For Bus Rapid Transit System Project In Western India
Debasis Sarkar , Sukanta K Dash and Rohit Vaghasiya
Infrastructure projects like Bus-Rapid-Transit-System (BRTS) would have been made more sustainable and environment-friendly by adopting the Clean Development Mechanism (CDM) which has been focused in this work.The proposed methodology leading to a CDM framework has been formulated by computing carbon footprint of the BRTS in a city in India. Emission reduction by using the alternative fuel like biodiesel has been proposed. Further, the use of more energy-consuming materials like cement and steel needs to be minimized.The use of flyash as part replacement of cement is recommended which would result in about 35 % reduction in CO2 emission. It is computed that 9763.55 tonnes of the reduced clinker would result in about 4559.55 tonnes of CO reduction. The reduced CO emission would result in about 2455.18 CER which 2 2 would qualify as a CDM project during the project extension phase. Also, it has been observed that the use of biodiesel to operate BRTS can reduce the CO emission by about 42% per year. As a 2 policy matter, it is strongly supported that the Annex-1 countries should transfer technology for vehicle re-engineering leading to the improved fuel economy
Clean development mechanism, Bus rapid transit system, Carbon footprint, Emission reduction, Alternative fuel, CDM Policy
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Research Articles
Stabilized Laterite Soil Bricks
Shanmuka K. N. , Manjunath K. and Prahallada, M. C.
In this experimental investigation an attempt has been made to study the suitability of fly ash, cement and sand in the preparation of stabilized laterite-soil bricks. Hence, the required number of bricks were compressed with different proportions of material such as, 77% Laterite soil + 15% sand + 5% fly ash + 3% cement; 75% Laterite soil + 15% sand + 5% fly ash + 5% cement, and 73% Laterite soil + 15% sand + 5% fly ash + 7% cement. The bricks were compressed using the hydraulic press paver block and brick making machine, and tested as per the Indian standard specification. The results of dry compressive strength, wet compressive strength and water absorption were tabulated. Based on the obtained test results stabilized laterite soil bricks are more stable than the traditional burnt bricks, resist higher compressive loads and having less water absorbing capacity.
Stabilized laterite soil bricks, Sand, Fly ash, ordinary port land cement, Dry compressive strength, Wet compressive strength, Water absorption
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Research Articles
Auditing Of Road Signs And Markings In The Majestic Area Of Bangalore City
N. Ramesh Babu and Harish M
Road signs and markings are important for proper guidance and safe movement of traffic. The road signs should be designed as per the IRC standards and should be provided at the right place. In some of the locations of Bangalore city, even though the road signs have been provided, they do not comply with the IRC standards. A simple audit has been done in one of the central parts of Bangalore city to find out whether the road signs have been provided at the right place, and the road markings done.
Research & Publications Department 