Title:
Practical Approach for Assessing Lightweight Aggregate Potential for Concrete Performance
Author(s):
Daniel Moreno, Patricia Martinez, and Mauricio Lopez
Publication:
Materials Journal
Volume:
111
Issue:
2
Appears on pages(s):
123-132
Keywords:
ceiling strength; compressive strength; density; low-density concrete, modulus of elasticity; strength model; two-phase models
DOI:
10.14359/51686720
Date:
3/1/2014
Abstract:
The properties and amount of lightweight aggregates used in a concrete mixture can significantly influence its mechanical properties
and density. Nevertheless, such influence cannot be accurately
described and used in practical application without an extensive
experimental work. A practical evaluation method for assessing
the influence of lightweight aggregate on concrete properties is
required to anticipate the performance of concrete in advance and
chose the most suitable lightweight aggregate for a certain structural
application.
In this paper, existing models are reviewed, generalized, and
validated to obtain a methodology for assessing the potential of
the lightweight aggregates to provide a specified concrete density,
modulus of elasticity, and compressive strength. A practical evaluation
methodology is proposed and validated with four different
lightweight aggregates, obtaining correlations between measured
and estimated density; modulus of elasticity; and compressive
strength of 93.4, 84.8, and 91.7%, respectively. Therefore, this
methodology allows practical and reliable comparison and selection
of lightweight aggregates based on only one trial mixture.