International Journal of Geomate 

About: International Journal of Geomate is an academic journal published by GEOMATE International Society. The journal publishes majorly in the area(s): Geology & Environmental science. It has an ISSN identifier of 2186-2982. Over the lifetime, 2113 publications have been published receiving 7578 citations. The journal is also known as: Geotechnique, construction materials and environment & geotechnique, construction materials and environment.

Image analysis techniques on evaluation of particle size distribution of gravel

Abstract: Particle size distribution of granular materials is usually evaluated by sieve analysis test. In this research, an image analysis technique using ImageJ is proposed to evaluate particle size distribution of gravels. On particular conditions, some differences of gradation curves determined by sieve analysis and image analysis were observed. Based on the results, several aspects related to image analyzing are discussed in the paper. They include appropriate evaluation of particle grain size in image analysis, minimization of shadow effects appeared in images, effects of number of particles adopted for sieve analysis and image analysis and so on. It was found that grain size in image analysis should be defined appropriately to compare the gradation curves by the two methods. Probably, due to light effects, it was also observed that black color sheets are better than white color sheets to place particles. This method can be used as an in-situ test method since this method needs only a camera and a computer.

Suitability evaluation of space utilization based on enviromental sustainability at the coastal area of bungus bay in padang city, indonesia

Abstract: This study aimed to evaluate the suitability of space utilization conducted in the coastal area ofBungus bay. The research was conducted through field survey with a spatial approach using GeographicInformation System (GIS) in order to know the suitability of area allocations which were served as a protectedzone, utilization zone, and special zone. The results showed that zone II covers an area of 232,9 ha with a scoreof 48,4 and zone II covers an area of 136,2 ha with a score of 23 was not-suitable served as utilization zone,and zone III covers an area of 539,9 ha with a score of 61 was suitable served as utilization zone. Managementalternative for not-suitable category in the protected zone at location 8 can be managed by the establishing ofcoast protection, establishing of stilt house, and the improvement of roads connected to the main road; On theutilization zone of location 11, location 12, location 18, and location 23 can be managed by relocating thesettlement as far as >100 m from the coast, establishing of coast protection, establishing of stilt house, andimproving roads connected to the main road; On the special zone of location 1 can be managed by relocatingthe distance limit of ship track and activity, making of settling ponds for waste discharging, and establishingstilt house; and on the special zone of location 25 can be managed by relocating the distance limit of ship trackand activity, making of settling ponds for waste discharging, and dust suppression (wetting) during coal loading,and unloading.

Enhancing the engineering properties of expansive soil using bagasse ash and hydrated lime

Abstract: The main objective of this paper is to investigate the influence of hydrated lime and bagasse ash on engineering properties of expansive soil obtained from an array of laboratory tests. Bagasse ash is a readily available waste by-product of the sugar-cane refining industry posing risks to environment. Bagasse ash is considered in this investigation in order to evaluate the potential benefits of its pozzolanic material for stabilisation of expansive soil. The preparation of stabilised soil specimens was conducted by changing the bagasse ash contents from 0 to 25% by dry weight of expansive soil along with an increase in hydrated lime. The bearing capacity and shrinkage properties of stabilised expansive soil were examined through a series of experimental tests including linear shrinkage and California bearing ratio (CBR) after various curing periods of 3, 7 and 28 days. The results reveal that the additions of hydrated lime and bagasse ash improved the strength and bearing capacity of stabilised expansive soil remarkably, and meanwhile significantly reduced the linear shrinkage of treated expansive soil. Hence, the application of hydrated lime and bagasse ash as reinforcing material can not only enhance the engineering properties of expansive soil, but also facilitate sustainable development by using sugarcane waste by-product to improve unusable clay material in road construction.

Microplastics ingestion by freshwater fish in the chi river, thailand

Abstract: Microplastic pollution mainly emanates from terrestrial sources but studies of plastic contamination in freshwater ecosystems remain limited. Consumption of freshwater fish is widespread throughout all regions of Southeast Asia. Contamination of microplastics in fish is an important issue which leads to human health risk. Common freshwater fish in the Chi River, Thailand were caught by local fishermen and investigated for abundance, size, color and shape of microplastics. Eight fish species were investigated. Results showed that 72.9% of the collected fish were polluted with microplastics at mean abundance of 1.760.97 particles per fish and was no significant difference of abundance between species. Percentage occurrence of microplastics was highest in omnivorous fish Puntioplites proctozysron (86.7%) with the most common size of microplastics ingested by fish at over 0.5 mm (47.5%), of which 56.9% were blue color and 86.9% were fiber shaped. Results revealed that fishing nets and fish cages were major sources of microplastic contaminants in the Chi River.

A Review of Electrokinetic Treatment Technique for Improving the Engineering Characteristics of Low Permeable Problematic Soils

Abstract: The use of electrokinetic (EK) treatment which is a comparatively new methodology is being investigated in some parts of the world as a viable in situ soil remediation and treatment method. The principles of EK treatment method involve applying a low direct current or a low potential gradient to electrodes inserted in the low permeable soils that cannot readily drained. The transportation of charged species across the soil involves several complex mechanisms such as electrolysis, electro-osmosis, electro-migration and electrophoresis. This technique can also be applied/enhanced by introducing desirable non-toxic chemical compounds such as lime or cement solutions to the soil by introducing them at the appropriate electrode. The combined effect of these processes together with various geochemical reactions alters the chemical composition of the soil porous medium and thereby alters the physicochemical properties of the soil. Although the technology has been approved to be practical in many laboratory bench scale experiments and small-scale pilot field tests, complicated features such as many electrochemical reactions and soil contaminant interactions are still not fully understood, therefore there is a need for further research to be conducted for a better understanding of physicochemical changes in problematic soils and efficiency of this newly developed technology.