Attractive Factors of Public Private Partnership (PPP) for Road Projects in Ethiopia
Issue:
Volume 4, Issue 3, June 2019
Pages:
59-68
Received:
12 June 2019
Accepted:
10 July 2019
Published:
23 July 2019
Abstract: The private sector has long been involved in delivering public sector projects in Ethiopia but its role limited as consultant and contractor for the government. Over recent years, the interest in adopting Public Private Partnership (PPP) has increased internationally. Many research outcomes have presented positive reasons for the governments and the private sector to welcome this form of long term contract arrangement, rather than continue involving in the traditional procurement methods. This paper aims to explore the attractive factors for PPP implementation in the Ethiopian road sector. A questionnaire survey was conducted in Ethiopia and survey respondents were invited to rate their perceptions on the importance of seventeen different attractive factors identified. The results show that the five important attractive factors for pursuing PPP in the Ethiopian road sector are: ‘solve the problem of public sector budget restraint’, ‘facilitate creative and innovative approaches’, ‘save time in delivering the project’, ‘improve maintainability’ and ‘enhance government integrated solution capacity’. The research outputs contribute to the limited knowledge on PPP practices in Ethiopia by providing empirical evidence on the conditions that are attractive to the introduction of PPP in the road sector.
Abstract: The private sector has long been involved in delivering public sector projects in Ethiopia but its role limited as consultant and contractor for the government. Over recent years, the interest in adopting Public Private Partnership (PPP) has increased internationally. Many research outcomes have presented positive reasons for the governments and th...
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Effect of Retarder Usage on Concrete Characteristic
Panennungi Tayeb,
Mithen Lullulangi,
Onesimus Sampebua’
Issue:
Volume 4, Issue 3, June 2019
Pages:
69-72
Received:
16 June 2019
Accepted:
26 July 2019
Published:
10 August 2019
Abstract: This research is experimental research aimed at to investigate the effect in using retarder onto concrete workability and compressive strength. The sample will be made of concrete cube with uniform size is 15 cm x 15 cm x 15 cm. the total amounts of cube are 96 pieces, each 32 samples for each data groups into 0%, 1%, 2% and 4%, the sample are then kept fresh with various time, 0 minute, 10 minutes, 15 minutes and 20 minutes. The fresh sample’s feasibility and compressive strength will be examined at 7, 14, and 28 days concrete. The result shows workability concrete changing in case retarder addition. The higher retarder concentrations cause either increased slump value or easy-made concrete. The longer fresh concrete are storage will result in decreased in slump value or the concrete is viscous. In concrete with age 7, 14, 28 days, the highest pressure strength is 2%. Additions in 4% retarders are significantly degraded pressure strength. Concrete storage up to 20 minutes does not give significant concrete pressure strength.
Abstract: This research is experimental research aimed at to investigate the effect in using retarder onto concrete workability and compressive strength. The sample will be made of concrete cube with uniform size is 15 cm x 15 cm x 15 cm. the total amounts of cube are 96 pieces, each 32 samples for each data groups into 0%, 1%, 2% and 4%, the sample are then...
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