Suitability of Enset Fiber with Coffee Husk Ash as Soil Stabilizer
Issue:
Volume 11, Issue 1, January 2023
Pages:
1-8
Received:
21 December 2022
Accepted:
8 February 2023
Published:
24 February 2023
Abstract: Expansive soil is a problematic soil due to swelling and shrinkage behavior during moisture variation. Damage to shallow foundations like pavement and footings of residential houses occurred due to these soils. Different scholars deal with stabilizing expansive soils using different mechanisms. This study also evaluated the suitability of Enset fiber with coffee husk ash materials to improve the expansive property of soils found in Jimma town. Different geotechnical parameters were determined for virgin soil and coffee husk ash with virgin soil. After treating the natural soil with varying percentages of coffee husk ash (5%, 10%, 15%, and 20%), the optimum levels of coffee husk ash were determined. Different laboratory tests such as CBR value, compaction test, and Atterberg limits were determined using the optimum coffee husk ash with varying percentages of enset fiber (0.3%, 0.6%, 0.9%, and 1.2%). The study reveals that the addition of coffee husk ash to enset fiber significantly increases the shear strength of expansive soils. With the addition of 15% of coffee husk ash and 0.9% of enset fiber, all tested geotechnical parameters improved the expansive soils to be used as subgrade materials. The soil changed from highly swelled material to poorly swelled material. Therefore, it can be concluded that the reuse of agricultural waste of coffee husk ash with enset fiber is applicable for expansive soil stabilization since it can improve the engineering strength of expansive soils and it is an economic and environmentally friendly material.
Abstract: Expansive soil is a problematic soil due to swelling and shrinkage behavior during moisture variation. Damage to shallow foundations like pavement and footings of residential houses occurred due to these soils. Different scholars deal with stabilizing expansive soils using different mechanisms. This study also evaluated the suitability of Enset fib...
Show More
A Comparative Study on Urban Governance in a Global City Phenomena Using Paradigm Analysis and Urban Development Principles
Issue:
Volume 11, Issue 1, January 2023
Pages:
9-13
Received:
27 January 2023
Accepted:
20 February 2023
Published:
21 March 2023
Abstract: The Global City is a new paradigm in the development of cities in the globalization era. World cities are world cities that lead to the circulation of capital and information, and are only focused on cities in the northern regions of the world, so that the nature of urban development is more focused on macroeconomic expansion which is space to encourage everyone to make transactions in the open market. This global city offers a space for economic reflection, that the economy itself does not occur only in one region but covers the world region, where there is no subordinate relationship between first world cities and third world cities because it offers the interdependence of urban development, as already mentioned and proposed in the concept of the global city. Mumbai's growth into a Mega City is due to the booming population density which makes the area more crowded and looks slum by tourists. Mumbai itself, as the heart of India's economy, must improve to make it look clean and tidy. The traffic jams that occur can make city life stop. One of the cities in India which is considered as the largest slum area in Southeast Asia because of the weak electricity and limited water network. Cities that actually function in the national economy as collectors and redistribution of economic cycles, now have to face other cities around the world to compete with each other to achieve a massive economy for the economic development of the city. The implication that arises then is that cities no longer have to be oriented to the local or national world, but also to be oriented to the global.
Abstract: The Global City is a new paradigm in the development of cities in the globalization era. World cities are world cities that lead to the circulation of capital and information, and are only focused on cities in the northern regions of the world, so that the nature of urban development is more focused on macroeconomic expansion which is space to enco...
Show More
