Cementitious materials with strain-hardening property and high tensile ductility are
promising materials on account of their mechanical and durability performances.
These materials require special ingredients which make it costly to be used in
conventional constructions. Hence, potential applications of Engineered
Cementitious Composites (ECC) generally focus on layered systems or repairs
which require the use of ECC together with another material. For it to be used
especially as a repair material, it should have sufficient dimensional compatibility
for preventing restrained shrinkage cracking. In this thesis, a strain-hardening fiberreinforced
cementitious composite, named Engineered Cementitious Composites,
was produced with local ingredients and their mechanical performance, dimensional
stability properties were investigated.
For investigating the effect of materials and mix proportions on mechanical
properties, compressive strength, flexural strength with mid-span beam deflections
and matrix fracture toughness tests were conducted. For determining the dimensional compatibility properties, autogenous, drying and restrained shrinkage
tests were conducted along with tensile creep tests. As a result it was shown that,
mechanical and dimensional stability properties are affected by the ingredients and
mix proportions. It was shown that especially autogenous shrinkage of mixtures was
relatively high which can cause early age cracking. In order to mitigate the adverse
effect of autogenous shrinkage, the effect of pre-soaked expanded perlite aggregate
replacement on mechanical, shrinkage and dimensional compatibility properties
was investigated. As a result it was found out that autogenous shrinkage can be
mitigated by the use of pre-soaked expanded perlite aggregate replacement.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12614713/index.pdf |
| Date | 01 September 2012 |
| Creators | Keskin, Suleyman Bahadir |
| Contributors | Yaman, Ismail Ozgur |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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