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Comparative Analysis of Non-Destructive Strength of Water Cured and Air Cured Concrete
Onungwe Ishmael,
Sarogoro Samuel,
George Abednego,
Akpan Paul
Issue:
Volume 3, Issue 6, November 2015
Pages:
194-198
Received:
15 October 2015
Accepted:
23 October 2015
Published:
16 November 2015
Abstract: Non-destructive strength comparative analysis was carried out on water cured and air cured concrete cube samples. The investigation was for a period of 7, 14, 21 and 28 days. The concrete cube samples were designed using a mix ratio of 1:2:4 and water cement ratio of 0.55 with batching done in weight. The results reveal a substantial strength gain in the water cured samples to that of the air cured, having taking an average results of four cubes for each group of the samples tested for, using a Schmidt rebound hammer. The 28 day age concrete cube gave a strength difference of 5.1 N/mm2 between the water cured and air cured samples in favor of strength gain of the water cured cubes, thereby pointing to the significant of curing in terms of concrete strength development.
Abstract: Non-destructive strength comparative analysis was carried out on water cured and air cured concrete cube samples. The investigation was for a period of 7, 14, 21 and 28 days. The concrete cube samples were designed using a mix ratio of 1:2:4 and water cement ratio of 0.55 with batching done in weight. The results reveal a substantial strength gain ...
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Effects of Road Improvement on Safety: A Case Study of Nairobi-Thika Superhighway
Chelugo Nicholas Chepchieng,
Abiero Gariy,
Mwatela Josphat K. Z.
Issue:
Volume 3, Issue 6, November 2015
Pages:
199-206
Received:
10 September 2015
Accepted:
4 October 2015
Published:
11 January 2016
Abstract: Road safety is one of the main transportation problems in developing countries. The major goal of the transportation system is to enhance mobility and road traffic accidents are unwanted by-products which have to be minimized while achieving the primary goal. Road safety engineers are faced with the challenge of addressing safety issues within the three major traffic safety pillars: human, vehicle, and infrastructure.All three aspects must be part of a traffic safety plan and dealt with subject to budget limitations. The project involved redesigns of all intersections and increment in the road lanes to enhance capacity and improve safety. The research study aimed to review the occurrences of crashes on the improved Thika-Nairobi superhighway in three phases; before, during and after construction. This research sought to assess the role of incorporation of different safety measures in road projects in Kenya and is anticipated to improve public awareness on the use of road safety provisions with the aim of reducing road traffic accidents and subsequent casualties. The approach used to realize this study involved gathering data from traffic police stations, conducting interviews to get the opinions of road users on safety and making observations on the turning movements of vehicles and pedestrians. The interactions were explored, analysed and modelled using Chi-squared distribution. These were then used to identify accident black spots and assess the effectiveness of road safety measures installed in the new super highway. This study revealed that the large number of accidents occurred in the years before and at the start of construction, reduced during construction and increased again after completion. The primary type of accidents along the highway is vehicle to pedestrian and vehicle to vehicle. Githurai 45, Safari park and G.S.U were established to be black spots. The most efficient road facility was found to be foot paths, and foot bridges.
Abstract: Road safety is one of the main transportation problems in developing countries. The major goal of the transportation system is to enhance mobility and road traffic accidents are unwanted by-products which have to be minimized while achieving the primary goal. Road safety engineers are faced with the challenge of addressing safety issues within the ...
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Use of Debris Program of Civil Construction Waste Management in Containment Residential Erosion Geovanni Braga in Anapolis in the State of Goiás
Welvis Furtado da Silva,
Ernane Rosa Martins
Issue:
Volume 3, Issue 6, November 2015
Pages:
207-216
Received:
26 January 2016
Published:
27 January 2016
Abstract: The gullies can cause great damage to the environment and also the very human environment, as one of the main consequences of this erosion is the major loss of soil mass. This work aims to present the use of debris originating from demolition in construction to contain the degraded area that causes environmental impact at Residential Geovanni Braga by the Municipal Works, Urban Services and Property Annapolis City Hall in the State of Goiás in the year of 2015. The methodology of the proposed study is theoretical, / literature, practical / field work / case study and qualitative and quantitative descriptive. Adopted the use of discarded materials such as: debris of construction material, tires, wood and shackles for sewage or storm water. As a result it was found that the techniques used in the treatment of erosion was rapid, extremely efficient and extremely cost-effective when compared to traditional methods, pleasing the residents' association and improving the aesthetics of the place before degraded.
Abstract: The gullies can cause great damage to the environment and also the very human environment, as one of the main consequences of this erosion is the major loss of soil mass. This work aims to present the use of debris originating from demolition in construction to contain the degraded area that causes environmental impact at Residential Geovanni Braga...
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