Effect of Material Constituents on Mechanical and Fracture Mechanics Properties of Ultra-High-Performance Concrete

Ibrahim, Mustapha; Farhat, Maen; Issa, Mohsen A.; Hasse, Jessica Amanda

doi:10.14359/51689717

Cited by 40 publications

(25 citation statements)

References 17 publications

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“…This may be due to the difference between the maximum aggregate size of silica sand (0.5 mm) and that of sand from the fluorite mine (0.3 mm) since, especially in cement-rich concrete. The smaller the maximum particle size, the greater the compressive strength of the concrete [27][28][29]. These increases in the compressive strength of concrete are in line with the results obtained by Zegardlo, [11] who obtained an increase in strength of 24.7% when using ceramic waste as an alternative to natural aggregate.…”

Section: Compressive Strengthsupporting

confidence: 87%

Use of Mining Waste to Produce Ultra-High-Performance Fibre-Reinforced Concrete

et al. 2020

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This research work analyses the influence of the use of by-products from a fluorite mine to replace the fine fraction of natural aggregates, on the properties of Ultra-High-Performance Fibre-Reinforced Concrete (UHPFRC). Replacing natural aggregates for different kinds of wastes is becoming common in concrete manufacturing and there are a number of studies into the use of waste from the construction sector in UHPFRC. However, there is very little work concerning the use of waste from the mining industry. Furthermore, most of the existing studies focus on granite wastes. So, using mining sand waste is an innovative alternative to replace natural aggregates in the manufacture of UHPFRC. The substitutions in this study are of 50%, 70% and 100% by volume of 0–0.5 mm natural silica sand. The results obtained show that the variations in the properties of consistency, compressive strength, modulus of elasticity and tensile strength, among others, are acceptable for substitutions of up to 70%. Therefore, fluorite mining sand waste is proved to be a viable alternative in the manufacturing of UHPFRC.

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Section: Compressive Strengthsupporting

confidence: 87%

Use of Mining Waste to Produce Ultra-High-Performance Fibre-Reinforced Concrete

et al. 2020

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“…Test results showed that, compressive strength of 200 MPa can be reached with low cement by using high-volume class C fly ash (Yiğiter et al, 2012). The use of Class C fly ash with up to 20% replacement of cement by weight was found to be beneficial in increasing the compressive strength at later age (28 and 90 days) (Ibrahim et al, 2017). In addition to mechanical and durability properties, fly ash was introduced as a supplemental cementitious material to enhance flowability of the mixture during the mixing stage and large-scale casting (Aghdasi et al, 2016).…”

Section: Introductionmentioning

confidence: 96%

Properties of ultra-high-performance concrete

Hasnat¹,

Kian²,

Ghafoori³

2019

Sustainable Construction Materials and Technologies (SCMT)

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In recent years, ultra-high-performance concrete (UHPC) has attracted interest from the research community because of its excellent physical, mechanical, and durability properties. However, due to very high production cost, its application in civil infrastructures has been thus far limited. In this context, an experimental investigation was conducted to produce lower cost UHPC utilizing locally available traditional fine aggregates. In order to obtain the maximum packing density and minimum matrix porosity, uniquely size graded manufactured fine aggregate was produced. Silica fume, industrial and natural pozzolans were used at different replacement levels of cement content. Flow properties, dimensional stability, and compressive and tensile strengths at different ages of the studied UHPCs were evaluated. More than 120 MPa compressive strength was attained using locally available fine aggregate. Fly ash seemed to be more effective than the natural pozzolan in producing higher compressive and tensile strengths. Incorporation of silica fume had positive impact on strength development of the studied UHPCs. However, silica fume increased the drying shrinkage of concrete.

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“…The term of HVFA concrete was first introduced by Malhotra at Canada Center for Mineral and Energy Technology (CANMET), Ottawa with a definition that fly ash (FA) replacement above 50% cement content addresses aforementioned issues [7]. FA levels of around 15-20 wt.% of binder in structural concrete have become accepted worldwide in regular practice, even in some recent attempts to apply in producing UHPC [8,9]. HVFA concrete (HVFAC), defined as FA replacement above 50%, partly addresses this issue.…”

Section: Introductionmentioning

confidence: 99%

Mix design of high-volume fly ash ultra high performance concrete

Tuấn

Dong

Thanh³

et al. 2021

STCE

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The addition of supplementary cementitious materials (SCMs) to replace cement, especially with a high volume (> 50%), is an effective way to reduce the environmental impact due to the CO2 emissions generated in the production of ultra-high performance concrete (UHPC). Unfortunately, no official guidelines of UHPC using a high volume of SCMs have been published up to now. This paper proposes a new method of mix design for UHPC using high volume fly ash (HVFA), that is referred to the particle packing optimization of the Compressive Packing Model proposed by F. de Larrard. This proposed method also considers the heat treatment curing duration to maximize the compressive strength of HVFA UHPC. The experimental results using this proposed mix design method show that the optimum fly ash content of 50 wt.% of binder can be used to produce HVFA UHPC with a compressive strength of over 120 MPa and 150 MPa under standard curing and heat treatment, respectively. Moreover, the embodied CO2 emissions of UHPC reduces 56.4% with addition of 50% FA.

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Effect of Material Constituents on Mechanical and Fracture Mechanics Properties of Ultra-High-Performance Concrete

Cited by 40 publications

References 17 publications

Use of Mining Waste to Produce Ultra-High-Performance Fibre-Reinforced Concrete

Use of Mining Waste to Produce Ultra-High-Performance Fibre-Reinforced Concrete

Properties of ultra-high-performance concrete

Mix design of high-volume fly ash ultra high performance concrete

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