Universiti Tun Hussein Onn Malaysia
FACULTY OF CIVIL ENGINEERING AND ENVIRONMENTAL
This study mainly discussed the grouting technique and the formation of grouted sand samples which is used for further study and analysis. However, this study presented the results of experimental investigation carried out on grouting in... more
This study mainly discussed the grouting technique and the formation of grouted sand samples which is used for further study and analysis. However, this study presented the results of experimental investigation carried out on grouting in order to study the behavior of sand after grouting. Shear strength of the soil before and after grouting was studied for different water cement ratios of grout mixes. It was found that the strength of sand increased after injecting the cement. This study also explains on the formation of grouted samples in order to form samples which are suitable for further testing. The effect of cement grouts on the shear strength and shear strength of sand were investigated. Grouting setup equipment was developed and simulated for the purpose of conducting grouting by injecting cement grout into sand samples and compressive strength test were also conducted on these grouted samples. This study also discussed the development of grouted sand strength with respect to the water cement ratio. The results of the various investigations conclusively proved that grouting can be used as an effective way to improve the strength characteristics significantly and can also contribute to the stabilization of sand.
- by ياسر راجح جميل
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Use of lignite in power generation has led to increasing environmental problems associated not only with gaseous emissions but also with the disposal of ash residues. In particular, use of low quality coal with high ash content results in... more
Use of lignite in power generation has led to increasing environmental problems associated not only with gaseous emissions but also with the disposal of ash residues. In particular, use of low quality coal with high ash content results in huge quantities of bottom ash to be disposed of. The main problem related to bottom ash disposal is leaching and release of contaminants constitute. Due to the stricter environmental regulations, the leaching characteristics of bottom ash obtained from thermal power plant were studied to assess their safe disposal. The mobility of metals from bottom ash was tested using acidic leach liquor (H 2 SO 4 ), alkaline leaching solution (NaOH) and distilled water under different conditions (liquid:solid ratio, number of leaching stages and pH) at room temperature. The results obtained were evaluated with a toxicity characteristic leaching procedure according to the Bulgarian regulation leaching test. It was found that the concentration of various metals in leachates depends on their chemical nature, in association with mineral phases of ash. The results showed that the extraction of metals from bottom ash depends on the leaching medium, liquid:solid ratio and number of leaching stages. The results give a possibility for classification of the waste and for assessment the potential use of some components.
- by Farhana Faid
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Traffic accidents are considered as an unplanned and unfortunate event which is a serious concern to the community as well as the authority. An accident-counter measure can reduce the rate of road accidents by initially identifying... more
Traffic accidents are considered as an unplanned and unfortunate event which is a serious concern to the community as well as the authority. An accident-counter measure can reduce the rate of road accidents by initially identifying critical locations. The total of road accidents along FT 024 between 2009 and 2012 is 907 cases. Road accidents during the same period range between 24 % and 26 % each year. These accidents killed 34 people and injuring another 101 people. This research aims to identify factors that may contribute to the cause of accidents and to study the effects of speed, volume and road geometry on road accidents. In this study, the locations labelled as km 1, km 2, km 4, km 8, km 5 and km 14 of Federal Route FT 024 Yong Peng – Parit Sulong were selected as the study-case sections based on Accident Point Weightage of ranking, in which each location has different road characteristics. Speed study was carried out at selected road sections to evaluate the influence of speed upon road accidents; and traffic volume count was conducted at the same selected road sections to determine the existing condition of the route. Besides, road geometry observations and measurements were also conducted at selected sections, they were also studied to evaluate influence of road designs upon road accidents. The extracted data were analyzed by using regression analysis on different variables to evaluate the relationship between accident Weightage point and other dependent variables that were considered to have considerable effects upon road accidents such as mean speed, volume, shoulder width, lane width and access point. P value below 0.05 was considered as statistically significant. After conducting data analysis, this study showed that the number of road accidents increases with the increment of speed and access point. On the other hand, volume has no strong relationship to road accidents which means that it may not have an effect on accidents. Moreover, based on the assumptions made by the researchers and project supervisors, road safety index development is important for the selected road sections along FT 024 to improve the road conditions in terms of safety and also to propose improvements at the selected locations in order to reduce accident rate.
Public transport is one of the facilities available in Malaysia. Overwhelming demand from the community has demanded public transport as an alternative for some people to do their daily activities. The increasing of Malaysian population... more
Public transport is one of the facilities available in Malaysia. Overwhelming demand from the community has demanded public transport as an alternative for some people to do their daily activities. The increasing of Malaysian population brought many problems to the environment especially traffic congestion problem. The Government spends a lot of money to overcome this problem [10]. Public transport has been upgraded to ensure user comfort. Most people in the city are more interested in using railway transport as traffic congestion and travel time accuracy is better than other public transport [1, 5]. To influence public demand, the facilities available at the train station should be complete [3, 5]. The choice of location for the study are Batu Gajah station (station 1) and Kluang station (station 2) for rural services while Bandar Tasik Selatan station (station 3) and KL Central station (station 4) for urban services. The results of this study showed that, based on data and information obtained from field survey work and the feedback questionnaires from users, basic facilities at railway stations surveyed for urban and rural services can be identified and listed. An analysis of the status of the facilities at railway stations can be established through the safety of passengers and observations in the field. The facilities available at the urban service station are more complete than in rural service station. Facilities at railway station should be improved to attract people using the facilities.