Development of a Mixer for Concrete Production
Daniyan Ilesanmi A.,
Aderoba Adeyemi A.,
Jimmy Daniel N.,
Rominiyi Oluwashina L.,
Adewumi Deborah F.
Issue:
Volume 2, Issue 3, June 2017
Pages:
20-24
Received:
3 June 2017
Accepted:
10 July 2017
Published:
9 August 2017
Abstract: In an attempt to improve the production of concrete and make its mixing easy, a 700 mm × 530 mm drum size of a concrete mixing machine was designed and fabricated. The machine parts were made of mild steel, because of its availability and versatile machinability. The efficiency was examined using cement, sand and coarse aggregate with water was added to the dry mix to form a paste and then thoroughly mixed by the machine. The machine is capable of mixing concrete of 50 kg and the mixing time was found to be relatively equal to the time of mixing using the conventional concrete mixer. When the mixing was performed manually, results obtained indicated that the developed concrete mixer is highly efficient in operation with shorter processing time and higher processing capacity as opposed to the manual method, hence, the fabricated machine can be used for batch production of concrete for improved and effective mixing operations in construction sites.
Abstract: In an attempt to improve the production of concrete and make its mixing easy, a 700 mm × 530 mm drum size of a concrete mixing machine was designed and fabricated. The machine parts were made of mild steel, because of its availability and versatile machinability. The efficiency was examined using cement, sand and coarse aggregate with water was add...
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Measuring High Surface Temperature in Concentrated Solar Radiation Environments
Jesús Ballestrín,
María-Isabel Roldán
Issue:
Volume 2, Issue 3, June 2017
Pages:
25-35
Received:
7 March 2017
Accepted:
22 March 2017
Published:
15 October 2017
Abstract: Surface temperature is a highly desired but difficult measurement especially in concentrated solar context. In this work a method for surface temperature measurement based on contact sensors is presented. In the case of materials with high thermal conductivity, contact sensors positioned in the back of the material sample and very close to the surface is the most accurate way to measure surface temperature. Computational Fluid Dynamics simulations have shown the truth of this statement. The higher thermal conductivity of the material, the lower the uncertainty in the measurement of surface temperature using this methodology. This measurement procedure has been applied to AISI 310S steel samples in the Plataforma Solar de Almería vertical axis solar furnace SF5 confirming the validity of the simulations.
Abstract: Surface temperature is a highly desired but difficult measurement especially in concentrated solar context. In this work a method for surface temperature measurement based on contact sensors is presented. In the case of materials with high thermal conductivity, contact sensors positioned in the back of the material sample and very close to the surf...
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