2019
DOI: 10.1016/j.heliyon.2019.e02081
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Properties of SCC containing pozzolans, Wollastonite micro fiber, and recycled aggregates

Abstract: Self compacting concretes (SCC) containing higher volumes of pozzolanic materials possess compressive strengths up to 30MPa. Fibers like steel, polypropylene, and carbon fibers are added in small volumes ranging from 0.25-2% v/v of concrete to increase the strength (>40MPa) of such concretes as higher volumes of fiber cause balling effect on account of inhomogeneity, thereby reducing the strength and workability. Hence higher volume of cement substitution either with mineral admixtures or fibers, or with both,… Show more

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Cited by 19 publications
(6 citation statements)
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“…Self-compacting concrete is like any ordinary concrete known to be of low tensile strength and impact performance. However, including fibers would enhance these properties significantly [15,16,17,18,19,20,24]. Yet, as the use of fibers has its advantages in improving the strength and structural performance, it also has the disadvantage of adversely affecting the workability of concrete mixtures.…”
Section: Introductionmentioning
confidence: 99%
“…Self-compacting concrete is like any ordinary concrete known to be of low tensile strength and impact performance. However, including fibers would enhance these properties significantly [15,16,17,18,19,20,24]. Yet, as the use of fibers has its advantages in improving the strength and structural performance, it also has the disadvantage of adversely affecting the workability of concrete mixtures.…”
Section: Introductionmentioning
confidence: 99%
“…In addition, its durability properties enhanced with the usage of wollastonite. In the study where the combination of wollastonite, fly ash and microsilica was studied, the use of almost equal amounts of wollastonite, fly ash and microsilica instead of about 30% cement had a positive effect on mechanical strength and durability properties [ 56 ]. Although it is advantageous to self-compacting concrete without requiring labor, a porous structure that could occur may cause durability problems.…”
Section: Self-compacting Concretementioning
confidence: 99%
“…Higher WF dosing can significantly contribute to the 28 days flexural strength of the mixture, which may be attributed to the low matrix strength and weak fibers-matrix bonding due to insufficient hydration of the cement in the early age. With the extension of the curing age, the degree of hydration of the cement goes up and the pozzolanic reaction occurs between the fly ash and Ca(OH)2 in the hydration products, and the matrix strength becomes higher and the bonding force between fibers and matrix is greater [13]. When the exterior is subjected to ultimate load, the fibers is damaged by slip-fracture.…”
Section: Flexural Strengthmentioning
confidence: 99%