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Full-Text Articles in Engineering

Effect Of Fly Ash Fortification In The Manufacture Process Of Making Concrete Towards Characteristics Of Concrete In Sulfuric Acid Solution, Asep Handaya Saputra, Muhammad Shohibi, Masatoshi Kubouchi Dec 2015

Effect Of Fly Ash Fortification In The Manufacture Process Of Making Concrete Towards Characteristics Of Concrete In Sulfuric Acid Solution, Asep Handaya Saputra, Muhammad Shohibi, Masatoshi Kubouchi

Makara Journal of Technology

Fly ash is a silica or alumino silica material that can be used as a constituent of cement in the concrete manufacturing process. Utilization of fly ash aims to improve durability and minimize the reduction of concrete’s compressive strength exposed to an acidic environment, which can be achieved through the pozzolanic reaction of fly ash with Ca(OH)2 within concrete. The reduced content of Ca(OH)2 through pozzolanic reaction will minimize the tendency of ettringite formation (compounds that cause deterioration and decrease the compressive strength of concrete). In order to determine the relation between fly ash replenishment ...


The Feasibility Of Using Washed Municipal Solid Waste Incinerator Bottom Ash In Compressed Mortar Paving Units, Wen-Ten Kuo, Chih-Chien Liu, Chun-Ya Shu Jun 2015

The Feasibility Of Using Washed Municipal Solid Waste Incinerator Bottom Ash In Compressed Mortar Paving Units, Wen-Ten Kuo, Chih-Chien Liu, Chun-Ya Shu

Journal of Marine Science and Technology

This study replaced natural fine aggregate with a fine aggregate of washed municipal solid waste incinerator bottom ash (WMSWIBS) in the production of compressed mortar paving units to explore the feasibility of using WMSWIBS in this application. Cement-aggregate ratios (c/a) of 0.1, 0.2, 0.3, 0.4, and 0.5 and water-cement ratios (w/c) of 0.20, 0.25, and 0.30 were selected. The results yielded a specific gravity of 2.21, aggregate absorption of 9.6%, and a fineness modulus of 3.2. The WMSWIBS's toxicity characteristic leaching procedure (TCLP) values were much ...


Factorial Design Approach In Proportioning Prestressed Self-Compacting Concrete, Wu-Jian Long, Kamal Khayat, Guillaume Lemieux, Feng Xing, Wei-Lun Wang Mar 2015

Factorial Design Approach In Proportioning Prestressed Self-Compacting Concrete, Wu-Jian Long, Kamal Khayat, Guillaume Lemieux, Feng Xing, Wei-Lun Wang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

In order to model the effect of mixture parameters and material properties on the hardened properties of, prestressed self-compacting concrete (SCC), and also to investigate the extensions of the statistical models, a factorial design was employed to identify the relative significance of these primary parameters and their interactions in terms of the mechanical and visco-elastic properties of SCC. In addition to the 16 fractional factorial mixtures evaluated in the modeled region of -1 to +1, eight axial mixtures were prepared at extreme values of -2 and +2 with the other variables maintained at the central points. Four replicate central mixtures ...


Supplementary Cementitious Materials Origin From Agricultural Wastes - A Review Jan 2015

Supplementary Cementitious Materials Origin From Agricultural Wastes - A Review

Faculty of Engineering University of Malaya

Concrete is heavily used as a construction material in modern society. With the growth in urbanization and industrialization, the demand for concrete is increasing day by-days. Therefore, raw materials and natural resources are required in large quantities for concrete production worldwide. At the same time, a considerable quantity of agricultural waste and other types of solid material disposal are posing serious environmental issues. To minimize and reduce the negative impact of the concrete industry through the explosive usage of raw materials, the use of agricultural wastes as supplementary cementitious materials, the source of which are both reliable and suitable for ...


Utilisation Of Iron Ore Tailings As Aggregates In Concrete, Francis Atta Kuranchie, Sanjay Kumar Shukla, Daryoush Habibi, Alireza Mohyeddin Jan 2015

Utilisation Of Iron Ore Tailings As Aggregates In Concrete, Francis Atta Kuranchie, Sanjay Kumar Shukla, Daryoush Habibi, Alireza Mohyeddin

Research outputs 2014 to 2021

Sustainable handling of iron ore tailings is of prime concern to all stakeholders who are into iron ore mining. This study seeks to add value to the tailings by utilising them as a replacement for aggregates in concrete. A concrete mix of grade 40 MPa was prepared in the laboratory with water–cement ratio of 0.5. The concrete were cured for 1, 2, 3, 7, 14 and 28 days. The properties of the concrete such as workability, durability, density, compressive strength and indirect tensile strength were tested. A controlled mix of concrete was also prepared in similar way using ...