A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A crack closure system for cementitious composite materials using knotted shape memory polymer (k-SMP) fibres
Abstract Formation of cracks represents one of the major causes of concrete deterioration, which can lead to durability and safety issues. In this work, a novel crack closure system is developed, using polyethylene terephthalate (PET) polymer fibres embedded in a mortar mix. The PET polymer has shape memory properties and shrinks upon thermal activation, if free to do so, or otherwise exerts shrinkage restraint forces. A single knot was manufactured at each end of the PET fibres to provide mechanical anchorage into the mortar matrix. Mortar samples with embedded knotted fibres were pre-cracked and subsequently placed in an oven to thermally activate the polymers and induce the shrinkage mechanism into the fibres. Crack closure was measured in the range 45–100%, depending on the geometry, dimension and distribution of the fibres, and the size of the initial crack.
A crack closure system for cementitious composite materials using knotted shape memory polymer (k-SMP) fibres
Abstract Formation of cracks represents one of the major causes of concrete deterioration, which can lead to durability and safety issues. In this work, a novel crack closure system is developed, using polyethylene terephthalate (PET) polymer fibres embedded in a mortar mix. The PET polymer has shape memory properties and shrinks upon thermal activation, if free to do so, or otherwise exerts shrinkage restraint forces. A single knot was manufactured at each end of the PET fibres to provide mechanical anchorage into the mortar matrix. Mortar samples with embedded knotted fibres were pre-cracked and subsequently placed in an oven to thermally activate the polymers and induce the shrinkage mechanism into the fibres. Crack closure was measured in the range 45–100%, depending on the geometry, dimension and distribution of the fibres, and the size of the initial crack.
A crack closure system for cementitious composite materials using knotted shape memory polymer (k-SMP) fibres
Maddalena, Riccardo (author) / Bonanno, Lorenzo (author) / Balzano, Brunella (author) / Tuinea-Bobe, Cristina (author) / Sweeney, John (author) / Mihai, Iulia (author)
2020-07-20
Article (Journal)
Electronic Resource
English
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