Strength and fracture properties of asbestos-cement mortar composites

Y. W. Mai

doi:10.1007/BF00688413

Strength and fracture properties of asbestos-cement mortar composites

Y. W. Mai

Research output: Journal article publication › Journal article › Academic research › peer-review

33 Citations (Scopus)

Abstract

The strength and fracture properties of random asbestos fibre-reinforced cement mortar composites are reported in this paper. The fibre content varies between 5% and 20% by weight. Both the ultimate tensile strength (σ_t) and the modulus of rupture (σ_b) increase with increasing fibre-volume fraction. These results are shown to agree satisfactorily with the law of mixtures modified for randomly oriented short fibre-reinforced composites. The critical stress intensity factor (K_c) and the specific work of fracture (R) have been determined using three-point bend edge-notched beams and grooved double-cantilever-beam (DCB) specimens. There is generally good agreement between these two physical quantities estimated from the two testpiece geometries. It is shown that the fibre pull-out mechanism is dominant in the fracture of asbestos cements and that the specific work of fracture can be reasonably well predicted by considering the energies absorbed in both the pull-out and the fibre/matrix interfacial debonding processes.

Original language	English
Pages (from-to)	2091-2102
Number of pages	12
Journal	Journal of Materials Science
Volume	14
Issue number	9
DOIs	https://doi.org/10.1007/BF00688413
Publication status	Published - Sept 1979
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Materials Science (miscellaneous)
General Materials Science
Mechanics of Materials
Mechanical Engineering
Polymers and Plastics

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10.1007/BF00688413

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AB - The strength and fracture properties of random asbestos fibre-reinforced cement mortar composites are reported in this paper. The fibre content varies between 5% and 20% by weight. Both the ultimate tensile strength (σt) and the modulus of rupture (σb) increase with increasing fibre-volume fraction. These results are shown to agree satisfactorily with the law of mixtures modified for randomly oriented short fibre-reinforced composites. The critical stress intensity factor (Kc) and the specific work of fracture (R) have been determined using three-point bend edge-notched beams and grooved double-cantilever-beam (DCB) specimens. There is generally good agreement between these two physical quantities estimated from the two testpiece geometries. It is shown that the fibre pull-out mechanism is dominant in the fracture of asbestos cements and that the specific work of fracture can be reasonably well predicted by considering the energies absorbed in both the pull-out and the fibre/matrix interfacial debonding processes.

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Strength and fracture properties of asbestos-cement mortar composites

Abstract

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