1995
DOI: 10.1007/bf02473191
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Matrix design for pseudo-strain-hardening fibre reinforced cementitious composites

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Cited by 417 publications
(214 citation statements)
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“…And the deformation of ECC2 cured under all conditions is higher than ECC1, which may be explained that SAPs act as artificial flaws to trigger initiative crack easily occurred in matrix, which can help ECC specimens to realize pseudo strain-hardening performance [15]. From Fig.3 (a) and (b), it can be observed that the deformability of ECC2 is relatively well after incorporating SAPs.…”
Section: Four Point Bending Testmentioning
confidence: 90%
“…And the deformation of ECC2 cured under all conditions is higher than ECC1, which may be explained that SAPs act as artificial flaws to trigger initiative crack easily occurred in matrix, which can help ECC specimens to realize pseudo strain-hardening performance [15]. From Fig.3 (a) and (b), it can be observed that the deformability of ECC2 is relatively well after incorporating SAPs.…”
Section: Four Point Bending Testmentioning
confidence: 90%
“…The standards do not specify a measure of stress intensity factor of cementing materials. However, the method stated by ASTM E399: LinearElastic Plane-Strain Fracture Toughness K IC of Metallic Materials was found to be applicable to the cement matrix [22,23] and was therefore used throughout the study. Matrix specimens were kept in plastic bags at 95 ± 5 % RH, 23 ± 2°C and toughness tests were performed at the end of 7 and 28 days by using four beams on each date.…”
Section: Specimen Preparation and Testingmentioning
confidence: 99%
“…Therefore, when LWA volume increases, higher number of weak LWA particles are available in the path of crack, resulting in smoother cracking path and less energy needed for cracking, and then lower values of fracture toughness. Since higher matrix toughness could be detrimental to achieving the desired mechanical properties, and reducing the tendency to develop multiple-cracking [22], the use of LWA in ECC production should be helpful for achieving strainhardening behavior.…”
Section: Fracture Toughnessmentioning
confidence: 99%
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“…Esse comportamento, denominado "strain-hardening", é apresentado de forma simplificada na curva (a) da Figura 1, e se caracteriza pelo surgimento de múl-tiplas fissuras na matriz. Mesmo utilizando fibra polimérica, comportamento similar foi obtido por Li et al (1995), em um compósito denominado ECC ("Engineered Cementitious Composites"), que apresenta um pequeno aumento da resistên-cia após a primeira fissura, e somente após atingir grandes deformações, em um comportamento denominado pelos autores de "pseudo strain hardening" e representado pela curva (b) da Figura 1. Comportamento similar foi obtido recentemente em compósitos reforçados com fibras curtas de sisal (Ferreira, 2012) após a utilização de matrizes de cimento com reologia adequada.…”
Section: Introductionunclassified