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Equations for Mix Design of Structural Lightweight Concrete - Printable Version

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Equations for Mix Design of Structural Lightweight Concrete - odiclas - 08-02-2011


‪Equations for Mix Design of Structural Lightweight Concrete‬

Author: M. Abdullahi, H.M.A. Al-Mattarneh, B.S. Mohammed | Size: 55.8 KB | Format: PDF | Publisher: European Journal of Scientific Research | Year: 2009 | pages: 10 | ISBN: ISSN 1450-216X

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Equations for mix design of structural lightweight concrete are presented.
Conventionally, mix design of concrete is conducted using the tabular data and charts in
standards. This requires extra efforts of understanding the data in the code and
interpolations are often required when intermediate values are needed. The process is also
liable to human error as data may be erroneously taken by the mix designer. The tabular
data and graphs in ACI 211.2-98 are converted to equations. Various models were tried and
the best model that adequately represents the data was chosen based on the regression
coefficient and its predictive capability. The equations were used to solve some mix design
problems from reputable textural sources. The developed equations are capable of giving
material constituents for the first trial batch of structural lightweight concrete. These
equations can be used in place of the data in the code and would reduce the effort, time and
energy expended in the manual process of mix design of structural lightweight concrete.
The equations are also useful for mixture proportioning adjustment.

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