Effect of fiber length and surface characteristics on the mechanical properties of cementitious composites

Georgiou, Antroula; Pantazopoulou, Stavroula J.

doi:10.1016/j.conbuildmat.2016.09.009

Cited by 40 publications

(26 citation statements)

References 6 publications

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“…On the one hand, due to good flowability of the PVA-ECC before the initial set [18], the continuous disturbance of vibration during this period might induce a certain degree of bleeding for the PVA-ECC slurry. On the other hand, due to the hydrophilic characteristics of PVA fibers [19], the bleeding process might be accompanied by the floatation of the PVA fibers, resulting in a different distribution density for PVA fibers along the transverse section. Therefore, the tensile performance of PVA-ECC may be affected by these two possible effects before the initial set.…”

Section: Introductionmentioning

confidence: 99%

Effects of Vehicle-Induced Vibrations on the Tensile Performance of Early-Age PVA-ECC

et al. 2019

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Polyvinyl alcohol-engineering cementitious composites (PVA-ECCs) have been widely applied in bridge deck repairing or widening, and a common practice is that a portion of the bridge is left open to traffic while the closed portion is constructed, which exposes the early-age PVA-ECC to vehicle-induced vibrations. However, whether vehicle-induced vibrations affect the performance of early-age PVA-ECC remains unknown. The purpose of this study was to conduct laboratory test programs to investigate to what extent vehicle-induced vibrations soon after installation affects the tensile performance of the PVA-ECC. A self-improved device was used to simulate the vehicle-induced vibrations, and after vibrating with the designed variables, both a uniaxial tensile test and a grey correlation analysis were performed. The results indicated that the effects of vehicle-induced vibrations on the tensile performance of early-age PVA-ECCs were significant, and they generally tended to be negative. In particular, for all of the vibrated PVA-ECC specimens, the most negative effects occurred when vibration occurred during the period between the initial set and the final set. We concluded that although vehicle-induced vibrations during the setting periods had no substantial effects on the inherent strain-hardening characteristics of PVA-ECCs, the effects should not be ignored.

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Section: Introductionmentioning

confidence: 99%

Effects of Vehicle-Induced Vibrations on the Tensile Performance of Early-Age PVA-ECC

et al. 2019

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“…The effects of these fibers on cement have been intensively studied. Many researchers [18][19][20][21][22][23][24] reported an increase in the compressive and flexural strength when adding fibers to cement composites. Valeria and Nardinocchi [18], for example, observed a reduction in the drying shrinkage upon adding fiber to cement composites.…”

Section: Introductionmentioning

confidence: 99%

Engineering Properties of Basalt Fiber-Reinforced Bottom Ash Cement Paste Composites

2020

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Extinction of natural resources builds up pressure on governments to invest in research to find more sustainable resources within the construction sector. Earlier studies on mortar and concrete show that bottom ash and basalt fiber are independently alternative binders in the concrete sector. This study aims to use bottom ash and basalt fiber blends as alternative novel-based composites in pure cement paste. The strength and durability properties of two different percentages of bottom ash (40% and 50%) and three volume fractions of basalt fiber (0.3%, 0.75%, and 1.5%) were used at three curing periods (7, 28, and 56 days). In order to measure the physical properties of the basalt-reinforced bottom ash cement paste composites flowability, dry unit weight, porosity, and water absorption measurements at 7, 28, and 56 days of curing were performed. Furthermore, the mechanical properties of composites were determined by unconfined compressive strength and flexural strength tests. Finally, to assess the durability, sulfate-resistance and seawater-resistance tests have been performed on composites at 28 and 56 days of curing. Results showed that the addition of basalt fiber improves the physical, mechanical, and chemical stability properties of paste up to a limiting basalt fiber addition (0.3% volume fraction) where, above, an adverse effect has been monitored. It is clear that observed results can lead to the development of sustainability strategies in the concrete industry by utilizing bottom ash and basalt fiber as an alternative binder.

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“…On the one hand, due to good flowability of the PVA-ECC before the initial set [18], the continuous disturbance of vibration at this period might induce a certain degree of bleeding for the PVA-ECC slurry. On the other hand, due to the hydrophilic characteristics of PVA fibers [19], the bleeding process might be accompanied by the floatation of the PVA fibers, resulting in a different distribution density for PVA fibers along the transverse section. Therefore, the tensile performance of PVA-ECC may be affected by the two possible effects before the initial set.…”

Section: Introductionmentioning

confidence: 99%

Effects of Vehicle-Induced Vibrations on the Tensile Performance of Early Age PVA-ECC

Zhang¹,

Yan²,

Wang³

et al. 2019

Preprint

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Polyvinyl alcohol-engineering cementitious composites (PVA-ECC) has been widely applied in bridge deck repairing or widening, the common practice for doing this is that a portion of a bridge is left open to traffic while the closed portion is constructed, which expose the early age PVA-ECC to the vehicle-induced vibrations. However, whether vehicle-induced vibrations affect the tensile performance of early age PVA-ECC remains unknow. The purpose of this study was to conduct laboratory test programs on how much vehicle-induced vibrations during early ages affected the tensile performance of PVA-ECC. A self-improved device was used to simulate the vehicle-induced vibrations, and after vibrating with the designed variables, both a uniaxial tensile test and a grey correlation analysis were performed. The results indicated that: the effects of vehicle-induced vibrations on the tensile performance of early age PVA-ECC were significant, and they generally tended to be negative in this investigation. In particular, for all of the vibrated PVA-ECC specimens, the most negative age when vibrated occurred during the period between the initial set and the final set. We concluded that although vehicle-induced vibrations during the setting periods had no substantial effects on the inherent strain-hardening characteristics of PVA-ECC, the effects should not be ignored.

show abstract

Effect of fiber length and surface characteristics on the mechanical properties of cementitious composites

Cited by 40 publications

References 6 publications

Effects of Vehicle-Induced Vibrations on the Tensile Performance of Early-Age PVA-ECC

Effects of Vehicle-Induced Vibrations on the Tensile Performance of Early-Age PVA-ECC

Engineering Properties of Basalt Fiber-Reinforced Bottom Ash Cement Paste Composites

Effects of Vehicle-Induced Vibrations on the Tensile Performance of Early Age PVA-ECC

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