In: Civil Engineering
Please answer all 4 questions. Thank you!
1) What are the 2 primary differences between FRP and FRC re: stress-strain behavior of components?
2) What types of glass fiber are best to use in FRC?
3) How does cement matrix bond to fibers versus bonding to aggregate re: interface zone?
4) Which of the types of bonding (elastic bonding, frictional bonding, mechanically bonding) between fibers and cementitious matrix is most important for glass fibers and for steel fibers?
Composite Fibre Reinforced Concrete (FRC) -
Fibre Reinforced Polymer (FRP)
Best glass fibres to be used in FRC:
Initial interface between fibre and matrix is loose and porous. As matrix hydrates, interface becomes denser and the spaces get filled with various hydration product like calcium hydroxide crystals.
The stress is transferred from matrix to fibres in two ways:
Frictional bonding dominates the stress strain behaviour of fibre reinforced concrete. Thus frictional bonding is of main interest.
"Construction Materials: Their Nature and Behaviour, Fifth Edition" by Marios Soutsos, Peter Domone
"Concrete Construction Engineering Handbook" by Edward G. Nawy