- Volume 11, Number 2 (2023)
CONCRETE INNOVATIONS: PERFORMANCE ASSESSMENT OF LIGHTWEIGHT MIXTURES FEATURING POLYETHYLENE TEREPHTHALATE WASTE
Farida Hanum Zulfikar
Concrete is the most widely utilized building material in civil engineering structures, with its normal variant consisting of natural coarse aggregates, making it heavy and susceptible to seismic effects. To address these issues and promote sustainability, lightweight concrete has emerged as a viable alternative. Lightweight concrete not only reduces the dead load of buildings, leading to cost savings and increased flexibility but also improves seismic response, enables longer spans, and reduces the ratio of reinforcement to foundation materials. However, the production of normal concrete using natural aggregates poses significant environmental concerns and depletes precious natural resources. To mitigate these impacts...
WASTE-WISE CONSTRUCTION: AN EXPLORATION OF CRUSHED CLINKER BRICK AS A SUSTAINABLE COARSE AGGREGATE IN CONCRETE MIXES
Satoshi Hiroshi Suzuki, Yuki Emi Tanaka
The particle size distribution of aggregates plays a crucial role in determining the properties of concrete. Traditionally, sieves have been used to measure aggregate gradation, wherein the percentage of material passing through each sieve is calculated. A well-optimized gradation ensures maximum concrete density, resulting in enhanced compressive strength—the fundamental mechanical property for evaluating concrete quality. Although other concrete parameters like tensile and flexural strength rely on compressive strength, the proportion of aggregates used in concrete (70-80%) underlines their significant influence. Notably, the particle size distribution of aggregates has been found to substantially impact concrete compressive strength, with larger coarse aggregates...
THE EVOLUTION OF BENISHANGUL GUMUZ: NAVIGATING GOVERNANCE, ECONOMICS, AND IDENTITY DYNAMICS (1991-2018)
Rahel Mulugeta Tadesse
The Mätäkäl Region in Western Ethiopia is a significant geographical area characterized by diverse topography and agro-ecological zones. This study aims to provide an extensive analysis of the region's landscape, climate, and agricultural potential. The Mätäkäl Zone, located in the northwestern part of Ethiopia, shares its borders with the Republic of Sudan to the north of the Blue Nile, Gondar to the north, Wälläga and Asossa to the south, and the former province of Gojjam to the east. The region's topography consists of 74% flat plains, 16% hilly and plateaus, 6% valleys, and 4% mountainous areas. Moreover, it is divided...