Steel fibre-reinforced concrete - present and future in engineering construction

Johnston, Colin D.

doi:10.1016/0010-4361(82)90047-7

Cited by 19 publications

(6 citation statements)

References 2 publications

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“…Some of the water available in the mix will be used in the hydration process. According to Johnston (1982), in some applications such as shotcrete, particularly ones in which staining is aesthetically undesirable, a thin coating of plain shotcrete, applied monolithically on top of the fibrous shotcrete, has successfully overcome the rusting problem. Considering the curing time of 14 days involved in this study, rusting of steel fibres in this period is not expected.…”

Section: Resultsmentioning

confidence: 99%

Mechanical characteristics of soft clay treated with fibre and cement

Fatahi¹,

Khabbaz²

2012

Geosynthetics International

131

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In this study, the influence of three types of fibre-polypropylene, recycled carpet and steel-on the mechanical properties of cement-treated clay is investigated. Cement-treated clay specimens were prepared with cement contents of 5%, 10% and 15% by weight of dry soil, and cured for 14 days. To investigate and understand the influence of different fibre types and contents, three different percentages of fibre content were adopted. The results of unconfined compression tests on 90 cylindrical samples of cement-treated clay with varied cement and fibre contents are analysed to discern the relationships between these parameters and the key mechanical properties, including unconfined compressive strength and stiffness of treated soil. Furthermore, indirect tension test results of a further 90 treated soil samples have been used to determine the influence of fibre and cement content on the tensile strength of the treated soil. The fibre reinforcement increases the peak compressive strength. The addition of fibres increases the residual strength and changes the brittle behaviour of the cement-treated clay to that of a more ductile material. The tensile strength of the cement-treated clay is increased by adding carpet and steel fibres, but small quantities of polypropylene fibres do not influence the tensile strength.

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Section: Resultsmentioning

confidence: 99%

Mechanical characteristics of soft clay treated with fibre and cement

Fatahi¹,

Khabbaz²

2012

Geosynthetics International

131

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“…Ainsi, la presence des fibres est particulibrement inttressante face aux difftrents types de fissures, en agissant comme contrble de la fissuration (Ibukiyama et al 1989;Bagate et al 1985;Johnston 1982). Qu'il s'agisse de fissures de retrait ou de fissures rCflkchies de l'ancien pavage, les fibres effectuent la couture de part et d'autre des lbvres de ces fissures, ce qui assure un transfert de charge et contribue B l'unitt stmcturale de la chausste (Ibukiyama et al 1989) (fig.…”

Section: Les Resuflaqages En Bkton Renforck De Fibresunclassified

Les resurfaçages minces adhérents en béton renforcé de fibres comme méthode de réhabilitation des chaussées de béton

Chanvillard¹,

Aı̈tcin²

1990

Can. J. Civ. Eng.

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R e~u le 24 juillet 1989RCvision acceptee le 5 mars 1990La dCgradation rapide et progressive du r6seau de chaussCe en btton de ciment nCcessite des travaux de rthabilitation frCquents pour maintenir un niveau de service acceptable. Dans le cas des chaussCes presentant encore une capacitt structurale satisfaisante, il est possible de proceder uniquement A un resurfa~age pour corriger les dCfauts de surface. Plusieurs types de resurfa~age sont envisageables selon 1'adhCrence dCveloppCe A l'interface. Aujourd'hui encore, le dimensionnement et les choix techniques de rtalisation relbvent du plus pur empirisme. Cependant, des rksultats majeurs ont Ct C obtenus sur le comportement de ces resurfa~ages, notamment aux niveaux de la fissuration. Ainsi, dans le cas d'une interface adhtrente, nous savons que la reflexion des fissures des anciennes dalles A travers le resurfa~age est inkvitable. I1 faut donc effectuer une rCparation prtalable de ces fissures. Cependant, dans le cas des bCtons renforcCs de fibres d'acier, il est possible d'obtenir une stabilisation de la fissuration par l'effet de couture apportCe par les fibres. Une expkrience de chantier rCaliste sur l'autoroute 40 dans la banlieue de MontrCal a permis de suivre le comportement d'un resurfa~age mince adhkrent en bCton renforcC de fibres. Plus de 2 annCes aprbs la mise en service, l'effet positif des fibres sur I'intCgritC de la chausste est nettement mis en Cvidence.The progressive and rapid deterioration of cement concrete road systems makes frequent rehabilitation necessary if an acceptable level of service is to be maintained. When a road's structural capacity is still satisfactory, simple resurfacing to correct surface faults is an acceptable option. Several different types of resurfacing are possible, depending on adhesion deCeloped at the interface. Dimensioning and selection of application techniques are still today purely empirical matters. However, major discoveries have been made about the behaviour of overlays, especially regarding cracking. For example, reflection in the overlay of the cracks of the old pavement is inevitable with a bonded interface. The old cracks must, therefore, be repaired first. However, with steel fibre reinforced concrete, the knitting effect of the fibres will stabilize the cracks. Roadwork performed along autoroute 40 in the suburbs of Montreal provided an opportunity to monitor the behaviour of a thin bonded overlay of fibre-reinforced concrete. Examination of the road more than 2 years after it was recommissioned clearly indicated that the fibres had a positive effect on the condition of the road.

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“…The improved properties of FRCCs increased the use of such materials in structural engineering applications. The advantages of using fibres in structural applications also increased the research on SFRC about four decades ago (BRANDT, 2008;JOHNSTON, 1982;MINDESS, 2007;NAAMAN, 2000).…”

Section: Introductionmentioning

confidence: 99%

Surface corrosion in uncracked high performance steel fibre reinforced cementitious composites

Vieira¹,

Cavalaroc

Aguado

2021

JUTS

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High-performance steel fibre reinforced cementitious composites (HPSFRCCs) are usually produced with high contents of steel fibres. Therefore, more fibres are expected close to the surface. Despite the very dense matrix of these materials, the ingress of detrimental agents such as chlorides may occur. The objective of this work is to evaluate the mechanisms and effects of corrosion in HPSFRCCs specimens in terms of surface aspect. Eight mixes of HPSFRCCs with different fibre content (40, 80, 120 and 160 kg/m3), with and without chlorides added to the mixes were designed. Prismatic specimens were cast and exposed to two curing conditions: initially in wet room and then in climatic room. Surface aspect was assessed by visual analysis with the use of a classification criteria. Results showed that the chloride added to the mixes induced a damage related to the superficial aspect whereas the specimens without chlorides presented no sign of corrosion over time.

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Steel fibre-reinforced concrete - present and future in engineering construction

Cited by 19 publications

References 2 publications

Mechanical characteristics of soft clay treated with fibre and cement

Mechanical characteristics of soft clay treated with fibre and cement

Les resurfaçages minces adhérents en béton renforcé de fibres comme méthode de réhabilitation des chaussées de béton

Surface corrosion in uncracked high performance steel fibre reinforced cementitious composites

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