Effect of pozzolans on the performance of fiber-reinforced mortars

Gutiérrez, Ruby Mejía de; Díaz, L.N.; Delvasto, Silvio

doi:10.1016/j.cemconcomp.2004.09.010

Cited by 140 publications

(63 citation statements)

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“…El GRC fabricado con una adición de metacaolín se denomina Cem-FIL Star y muestra una mejora considerable de la resistencia a tracción y de la ductilidad en ensayos realizados sobre material envejecido mediante métodos acelerados. Estudios recientes afirman también que el humo de sílice y las cenizas volantes tienen una influencia positiva en el comportamiento de los morteros reforzados con fibras de vidrio (20,21).…”

Section: Introductionunclassified

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El efecto del humo de sílice y el metacaolín en el proceso de envejecimiento de los morteros de cemento reforzados con fibras de vidrio (GRC)

Enfedaque¹,

Paradela²,

Sánchez‐Gálvez³

2010

Mater. construcc.

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Section: Introductionunclassified

“…Cem-FIL Star, a metakaolin-containing GRC, exhibits much improved tensile strength and ductility in accelerated ageing tests. Other recent studies have proven that silica fume and fly ash also have a beneficial effect on the behaviour of glass-fibre reinforced concrete (20,21).…”

Section: Introductionmentioning

confidence: 99%

El efecto del humo de sílice y el metacaolín en el proceso de envejecimiento de los morteros de cemento reforzados con fibras de vidrio (GRC)

Enfedaque¹,

Paradela²,

Sánchez‐Gálvez³

2010

Mater. construcc.

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“…Also, the interfacial bond between fibers and cementitious composites and its effect on crack resistance and durability was studied. Densification within the fiber bundle and at the fiber/cement interface, caused by the precipitation and growth of cement hydration products, particularly calcium hydroxide (Ca(OH) 2 ) crystals appears to be the main reason for the strong interfacial bonds [10]. Dense interface can reduce the curvature through which a fiber bridges a crack, inducing higher stresses and thus an increased chance of failure.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, microor nanopozzolanic particles were incorporated as active substitutions of OPC to compensate the mechanical strength degradation by improving toughness and mechanical properties reducing the size and amount of defects in cementitious material leading to better performance. Varieties of fibrous materials had been used for improving toughness and tensile strength performance of cementitious surface compounds and concrete [8][9][10][11][12][13]. Such materials combined good thermal resistance with enough mechanical strength and very low manufacturing costs.…”

Section: Introductionmentioning

confidence: 99%

Using of Microsilica for Strength Improvement of Fiber Reinforced Cementitious Surface Compounds

Shebl

Khalil

Shoukry

2013

ISRN Materials Science

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This study represents an extension work to investigate the role of ultra fine sand (UFS) in enhancing the mechanical properties of fiber reinforced cementitious compounds. The micro-structural origins were identified by scanning electron microscope (SEM). About 50% of UFS had a diameter of less than 20 m. Ordinary Portland Cement (OPC) was partially substituted by UFS at 3, 5, 7 and 10% by weight of binder. It was found that as UFS loadings increase, the flexural, compressive, and tensile strengths increased up to about 5% UFS loading by 12.9, 15.7 and 30.1%, respectively, thereafter, a decrease in these properties was observed. This can be attributed to the pozzolanic effect besides the filling effect of UFS resulting in enhancing the interfacial bonds between the sand grains and hydration products that makes the paste more homogeneous and dense. The effect of both short natural and artificial fiber loadings on the structural performance of compounds was also studied. Loadings of 2%, by weight, of short natural date palm leaves' midribs fibers (DP) and artificial polypropylene fibers (PP) were added to the 5% UFS blended mix. An increase in both flexural and tensile strength was achieved, while a decrease in the compressive strength was observed.

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“…Introduction of discrete and discontinuous fiber in UHPC mix was done to ensure ductility and to improve concrete properties particularly tensile strength, abrasion resistance and energy absorbing capacity [11], [12]. The presence of fiber helped to refrain crack growth and propagation and to transfer load to the unaffected area [13].…”

Section: Introductionmentioning

confidence: 99%

Impact Performance of Low Cement Ultra-High-Performance Concrete

Azmee¹,

Nuruddin²

2017

WIT Transactions on Ecology and the Environment

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Technology advancement in concrete industry and expanding interest for high quality construction materials have prompted the development of Ultra-High-Performance Concrete (UHPC). Despite of many advantages gained using UHPC, however, conventional design of UHPC poses many concerns especially on sustainability issues. Producing UHPC, requires relatively high amount of cement content and in most cases, the compositions are not optimized causing an increase in materials and energy cost. Low cement UHPC was proposed to minimize the economic and environmental disadvantages of current UHPC by incorporating high volume of Fly Ash (FA) and Silica Fume (SF) as cement replacement materials and locally available coarse aggregates. An experimental program was carried out to evaluate the effect of combined FA and SF on mechanical and impact performance of low cement UHPC. Both hooked and straight steel fibers with aspect ratio of 83 and 100 were used respectively as the reinforcing material. An enhancement of 111% was observed in impact resistance of the fibrous concretes with an incorporation of both FA and SF replacing 50% of cement, as compared to specimen without any replacement.

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Effect of pozzolans on the performance of fiber-reinforced mortars

Cited by 140 publications

References 1 publication

El efecto del humo de sílice y el metacaolín en el proceso de envejecimiento de los morteros de cemento reforzados con fibras de vidrio (GRC)

El efecto del humo de sílice y el metacaolín en el proceso de envejecimiento de los morteros de cemento reforzados con fibras de vidrio (GRC)

Using of Microsilica for Strength Improvement of Fiber Reinforced Cementitious Surface Compounds

Impact Performance of Low Cement Ultra-High-Performance Concrete

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