Papers by YIBAS M . Tafes
Journal of Materials in Civil Engineering, Jan 31, 2024
Journal of Materials in Civil Engineering
Al-Qadisiyah Journal for Engineering Sciences, 2019
Know a day’s utilization of local accessible materials is an important stage for sustainable, eco... more Know a day’s utilization of local accessible materials is an important stage for sustainable, economic building material on the earth surface. Within them Brick is one of the commonly used construction material around Jimma town due to the availability of clay soil. But brick produced by small micros un-skill enterprises rather than by traditional method, its quantity was small and its quality was unsatisfactory, because it can easily break and it has high water absorbing conduct. The purpose of investigation was be to improving the properties of clay soil properties by using Literate soil for in the manufacturing of bricks for masonry units. In order to achieve this researches include, non-probability sampling techniques was be used to collect samples in Jimma area, then collected of samples prepared for different laboratory test and by partially replacing literate soil by 5%, 10%, 15% and 20% on a clay soil in order to get optimum property by different mix ration for different lab...
Journal of Materials in Civil Engineering, Mar 31, 2024
Journal of Materials in Civil Engineering
Construction and Building Materials
SSRN Electronic Journal, 2022
At the time of industrial development, production of large amounts of wastage required proper dis... more At the time of industrial development, production of large amounts of wastage required proper disposal. To reduce the disposal problem, utilization of wastage in construction works is a very important aspect. Reuse of industrial waste had gained high momentum for achieving sustainable waste management locally and globally. Keeping this in mind, a research carried out to assess the utilization of molasses, lime and molasses-lime for improving natural gravel for sub-base and base course construction from Jimma Jiren quarry site. The natural gravel from this quarry site is known to have a poor quality, since it did not satisfy the ERA standard specification for sub-base and base course construction. To use Jiren natural gravel as a sub-base or base course construction material, it is necessary to improve its engineering properties. The laboratory test matrix in each test plan included variations in additive type, additive content, and curing period. It was established 8% cane molasses ...
International Journal of Engineering Research and, 2018
The economic back ground of Ethiopian mostly dependent of agricultural products. So that in the t... more The economic back ground of Ethiopian mostly dependent of agricultural products. So that in the time of agricultural development production of large amount of wastes requires disposal. In order to reduce the disposal problem, utilization of waste in civil engineering works is very important aspect. Agricultural waste reuse has gained high momentum for achieving sustainable waste management in recent times. Keeping this view in mind this study has been carried out to assess utilization of coffee husk ash for improving expansive black cotton soil to utilize as a subgrade material for road construction. Hence experimental investigations have been made to study the suitability of coffee husk ash to improve properties of expansive soil. The important geo-technical properties test was Specific gravity, Liquid limit, Plastic limit, Plasticity index, dry density and California Bearing Ratio values. Expansive soil covers large portion of Ethiopia, covering nearly 40% surface area of the Country. Jimma town exhibits such kind of soil as a subgrade material. They are characterized by their nature of expansion or shrinkage upon changes in moisture content. According to ERA 2002 this type of soils is poor for subgrade construction. The laboratory work involved sieve analysis along with consistence test to classify the soil sample. The preliminary investigation of the soil shows that it belongs to A-7-5 class of soil in AASHTO and CH in USCS soil classification system. Soils under this class are generally of poor engineering use. Atterberg limits, compaction and CBR tests were used to evaluate properties of stabilized soil. The soil was stabilized with coffee husk ash in stepped concentration of 5%, 10%, 15%, 20%, and 25% by dry weight of the soil. Analysis of the results shows the addition of coffee husk ash improve the geotechnical properties of the expansive black cotton soil. The addition of Coffee husk ash reduces plasticity index, swelling and OMC with an increase in MDD and CBR with all increased coffee husk ash contents. The addition of 20% and 25% of coffee husk ash established an increased CBR value by 252% and 296% respectively, indicating the subgrade class falling under S3. From this study it was found out that coffee husk ash stabilized soil do meet the minimum requirement of ERA pavement manual specification for use as a sub-grade material in road construction. Agricultural waste like coffee husk Ash have significant potential to be used in place of conventional material for various road constructions and should be projected for future construction.
Civil and Environmental Engineering, 2019
Nowadays, the utilization of locally accessible materials is a crucial stage for sustainable, eco... more Nowadays, the utilization of locally accessible materials is a crucial stage for sustainable, economical building material on the earth’s surface. Within them, brick is one of the commonly used construction materials around Jimma town due to the availability of clayed soil. Nevertheless, brick produced by small micros unskilled enterprises rather than by traditional methods, its quantity was small, and its quality was unsatisfactory because it can easily break, and it has high water-absorbing conduct. The purpose of the investigation was to improve the properties of clayed soil properties by using laterite soil for the manufacturing of bricks for masonry units. In order to achieve this, research used non-probability sampling techniques to collect samples in Jimma area. Then, the collected samples prepared for different laboratory tests and by partially replacing literate soil by 5 %, 10 %, 15 % and 20 % on a clayed soil in order to get optimum property by different mix ratio for dif...
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Papers by YIBAS M . Tafes