Structural lightweight aggregate concrete is an important and versatile material,
which offers a range of technical, economic and environmental-enhancing and
preserving advantages and is designed to become a dominant material in the new
millennium. For structural application of lightweight concrete, the density is often
more important than the strength. A decreased density for the same strength level
reduces the self-weight, foundation size and construction costs. Structural
lightweight aggregate concrete generally used to reduce dead weight of structure as
well as to reduce the risk of earthquake damages to a structure because the
earthquake forces that will influence the civil engineering structures are proportional
to the mass of those structures.
In this study, structural lightweight aggregate concrete was designed with the use of
natural perlite aggregate that will provide an advantage of reducing dead weight of
structure and to obtain a more economical structural lightweight concrete by the use
of perlite powder as a replacement of the cement. Six mixes were produced with
different cement content and with or without perlite powder. Six mixes divided into
two groups according to their cement content. First group had a cement content of
300 kg/m3 and second group had cement content of 500 kg/m3 / also the water/cement
ratios of groups were 0.49 and 0.35 respectively. Moreover, each group had three
sub-mixes with 0%, 20% and 35% of perlite powder as cement replacement.
According to results of experimental study, it was concluded that natural perlite
aggregate can be used in the production of structural lightweight aggregate concrete.
Based on the strength and density results of experimental work, it is possible to
produce lightweight concrete with 20 MPa-40 MPa cylindrical compressive strength
by using natural perlite aggregate. Also, the use of perlite powder, which will
provide economy, can reduce dead weight further and increase performance.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12607728/index.pdf |
| Date | 01 September 2006 |
| Creators | Asik, Mesut |
| Contributors | Turanli, Lutfullah |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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