A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Abstract Three kinds of different geometric (cross-section) polypropylene fibers were used to investigate their effects on plastic shrinkage cracking of cement mortars. The test results showed that polypropylene fiber made in drawingwire technique with circular cross-section (abbreviated as DW-PP fiber) had a more pronounced effect on the resistance to plasticshrinkage cracking than the polypropylene fiber made in a fibrillated film technique with rectangular cross-section (abbreviated as FF-PP fiber). Polypropylene fiber with Y-shape cross-section had a little more effective than that of DW-PP fiber. For the three kinds of polypropylene fibers, the plastic shrinkage cracking resistance for cement mortar increased with fiber addition changing from 0.05% to 0.15%. It was observed that there was almost no plastic shrinkage cracking even when the volume fraction of DW-PP fiber was as low as 0.10%. The mechanism of the resistance effect of different geometric polypropylene fibers on the plastic shrinkage cracking of cement mortars is discussed.
Résumé Cet article présente l'influence des fibres de polypropylène aux différentes formes géometriques sur la fissuration sous retrait plastique du mortier de ciment. Les résultats expérimentaux indiquent que la largeur de fissure et la valeur pondérée de fissuration globale des mortiers de ciment diminuent clairement lorsque l'on incorpore un certain volume de fibres de polypropylène. Dans la résistance à la fissuration sous retrait plastique du mortier, la fibre fabriquée par le tirage de fil est plus forte que celle des fibres fibrillées, mais elle est un peu moins forte que la fibre en forme d'Y. En fonction du volume de fibres, la résistance à la fissuration sous retrait plastique des mortiers fibrés en volume de 0,05% à 0,15% augmente. La fissuration du mortier incorporé en volume de 0,10% de fibres, fabriquées par le tirage de fil, a disparu en substance. L'article présente enfin la recherche sur le mécanisme permettant d'atténuer la fissuration des mortiers par la fibre de polypropylène en différentes formes.
Abstract Three kinds of different geometric (cross-section) polypropylene fibers were used to investigate their effects on plastic shrinkage cracking of cement mortars. The test results showed that polypropylene fiber made in drawingwire technique with circular cross-section (abbreviated as DW-PP fiber) had a more pronounced effect on the resistance to plasticshrinkage cracking than the polypropylene fiber made in a fibrillated film technique with rectangular cross-section (abbreviated as FF-PP fiber). Polypropylene fiber with Y-shape cross-section had a little more effective than that of DW-PP fiber. For the three kinds of polypropylene fibers, the plastic shrinkage cracking resistance for cement mortar increased with fiber addition changing from 0.05% to 0.15%. It was observed that there was almost no plastic shrinkage cracking even when the volume fraction of DW-PP fiber was as low as 0.10%. The mechanism of the resistance effect of different geometric polypropylene fibers on the plastic shrinkage cracking of cement mortars is discussed.
Résumé Cet article présente l'influence des fibres de polypropylène aux différentes formes géometriques sur la fissuration sous retrait plastique du mortier de ciment. Les résultats expérimentaux indiquent que la largeur de fissure et la valeur pondérée de fissuration globale des mortiers de ciment diminuent clairement lorsque l'on incorpore un certain volume de fibres de polypropylène. Dans la résistance à la fissuration sous retrait plastique du mortier, la fibre fabriquée par le tirage de fil est plus forte que celle des fibres fibrillées, mais elle est un peu moins forte que la fibre en forme d'Y. En fonction du volume de fibres, la résistance à la fissuration sous retrait plastique des mortiers fibrés en volume de 0,05% à 0,15% augmente. La fissuration du mortier incorporé en volume de 0,10% de fibres, fabriquées par le tirage de fil, a disparu en substance. L'article présente enfin la recherche sur le mécanisme permettant d'atténuer la fissuration des mortiers par la fibre de polypropylène en différentes formes.
Effect of different geometric polypropylene fibers on plastic shrinkage cracking of cement mortars
Materials and Structures ; 35 ; 165-169
2002-04-01
5 pages
Article (Journal)
Electronic Resource
English
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