Investigation on impact resistance foamed concrete reinforced by polypropylene fibre
Foamed Concrete (FC) needs high strength to prevent dynamic loading, thus it is important to enhance the ductility. Usage the Polypropylene Fibre (PF) examined its contribution in strength of FC on impact resistance. Microstructures were observed that air voids in matrix of FC produce micro-porous t...
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| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Published: |
2013
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/4789/ http://eprints.uthm.edu.my/4789/1/Investigation_on_Impact_Resistance_Foamed_Concrete.pdf |
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| Summary: | Foamed Concrete (FC) needs high strength to prevent dynamic loading, thus it is
important to enhance the ductility. Usage the Polypropylene Fibre (PF) examined its contribution in
strength of FC on impact resistance. Microstructures were observed that air voids in matrix of FC
produce micro-porous that reduce interfacial bonding into matrix and generate micro-crack that may
propagation crack growth. Presence of PF in admixture results fibrillation and reduces microcracks.
Tensile test was investigated that PF delays crack growth in matrix. In this investigation
impact test were conducted using an instrumented drop-weight impact tower. When impactor hits
the target surface in free surface condition causes compressive plastic wave transform to be tensile
wave. It was affected by tensile strength therefore local effect has not found spalling in crater field.
In addition influence of porous in matrix FC has ability to absorb the energy and it was not found
distal crack around surface area. Penetration depth results showed FC with PF subjected to impact
loading was lower than without FC. Presence of PF increases FC strength and local effect results
there was not impression of fragments around distal surface due to brittle crushing. |
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