Hs. Najm et Ae. Naaman, PREDICTION MODEL FOR ELASTIC-MODULUS OF HIGH-PERFORMANCE FIBER-REINFORCED CEMENT-BASED COMPOSITES, ACI materials journal, 92(3), 1995, pp. 304-314
Citations number
33
Categorie Soggetti
Construcion & Building Technology","Material Science
An extensive evaluation of 17 existing analytical models predicting th
e elastic modulus of fiber reinforced composites showed that none of t
he models is adequate to account for two important factors that greatl
y influence elastic modulus of fiber reinforced cement-based composite
s. These two factors are bond and matrix porosity. Moreover; finite el
ement analysis of a composite unit cell revealed that elastic modulus
decreases with a decrease in fiber bonded length, and that fiber end c
onditions (with and without end stress transfer capability) are critic
al, especially for high fiber-to-matrix moduli ratios. To account for
the newly identified variables, namely, bond at the fiber-matrix inter
face and porosity of the matrix a semirational prediction model is pro
posed and shown to be in good agreement with experimental observations
on slurry infiltrated fiber concrete (SIFCON).