Durability properties of lightweight self-consolidating concrete developed with three types of aggregates

Lotfy, Abdurrahmaan; Hossain, Khandaker M. Anwar; Lachemi, Mohamed

doi:10.1016/j.conbuildmat.2015.12.118

Cited by 70 publications

(46 citation statements)

References 20 publications

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“…The dry density is measured after 28 days sealed curing and drying for 7 days at 90 o C to constant weight. As seen in Figure 6, the dry density of HSL-ECC ranges from 1240 kg/m 3 to 1270 kg/m 3 . The addition of GGBS shows a marginally decrease in the density of HSL-ECC in comparison with control mixture.…”

Section: Physical Properties Of Hsl-eccmentioning

confidence: 99%

“…The use of lightweight concrete in constructions can offer many advantages such as weight saving, thermal insulation, saving in steel reinforcement and reduction in overall cost, etc. To achieve lower density, the lightweight concrete is traditionally made by using lightweight aggregate with porous structure or introducing foam into matrix [3][4][5]. However, its mechanical properties are considerably lower than normal concrete as the lightweight DOI 10.21012/FC9.130 aggregate is usually weaker than cement matrix and normal aggregates.…”

Section: Introductionmentioning

confidence: 99%

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High Strength Lightweight Strain-Hardening Cementitious Composite Incorporating Cenosphere

Chen¹,

Li²,

Yang³

2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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High strength lightweight concrete was originally designed for potential structural applications. However, the brittle nature and higher permeability became the main drawbacks for further broad application. In this case, it is imperative to develop a special type of high strength strain hardening lightweight cementitious composite, offering higher ductility, lower permeability and considerable weight saving. Engineered cementitious composite (ECC) is a class of high performance fiber reinforced composite characterized by strain hardening behavior and tight crack width. In this study, the low density of below 1500 kg/m 3 was achieve by introduce lightweight fine aggregates of cenosphere obtained from coal-fired power station to fully replace silica sand generally used in ECC preparation. Binary and ternary binder systems (cement, silica fume and slag) were employed to tailor the matrix properties for obtaining higher strength of more than 50 MPa and lower permeability. Polymeric fibers having a good compatibility with matrix were used to implement strain hardening behavior and higher ductility. The permeability and thermal conductivity tests were conducted to evaluate the applicable performance of resulting lightweight cementitious composite. The correlation between mechanical, physical and thermal properties was build up to reveal the effect of cenosphere on the performances of high strength lightweight strain hardening cementitious composite. The single fiber pull out test and matrix fracture toughness test were conducted to reveal the micromechanical mechanism of strain hardening behavior of high strength lightweight composites.

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Section: Physical Properties Of Hsl-eccmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High Strength Lightweight Strain-Hardening Cementitious Composite Incorporating Cenosphere

Chen¹,

Li²,

Yang³

2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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“…More recently, new generation of high-performance concretes (HPCs) have been developed by incorporating different materials (such as fibres, supplementary cementing materials, industrial wastes and lightweight aggregates) with superior fresh state, mechanical and durability properties than normal concrete. Ultrahigh-strength concrete (UHSC), engineered cementitious composite (ECC), lightweight concrete (LWC), self-consolidating concrete (SCC) and crumb rubber concrete (CRC) are several HPCs recently being developed, and their structural performance was evaluated by the Ryerson University research team (Sherir et al 2018;Lotfy et al 2016;Hossain et al 2012aHossain et al , b, 2018Hassan et al 2012;Mohammed et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…In most cases, behaviour of columns infilled with SCC was similar to that of their NC-filled counterparts. Recent research at Ryerson University has developed SCCs with lightweight aggregates (such as slag, pumice, expanded shale and expanded clay) (Lotfy et al 2016). However, not much literature is available for quantifying the behaviour of SCC and lightweight SCC under steel tube confinement.…”

Section: Introductionmentioning

confidence: 99%

Confinement of six different concretes in CFST columns having different shapes and slenderness

Hossain

Chu

2019

Int J Adv Struct Eng

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This paper presents behaviour of normal concrete, ultrahigh-strength concrete, engineered cementitious composite, lightweight concrete, self-consolidating concrete and crumb rubber concrete under confinement. Forty-six circular, square and rectangular concrete-filled steel tube columns with varying slenderness are tested under axial compression. Failure modes, axial load-displacement responses and stress-strain characteristics are analysed as well as concrete confined strengths are determined based on experimental results and existing models. The performance of existing confined strength models is evaluated and modified to accommodate different types of high-performance concretes and column shapes. The modified model improves the prediction of confined concrete strength with a mean predicted-to-experimental ratio of 1.05 as shape and concrete type factors are introduced.

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“…The higher the moisture content within the concrete mixture, the higher the probability of the concrete been susceptible to spalling. For instance, when concrete is "green" meaning recently poured, it is more likely to spall because its water content is higher than concrete that has cured (Lotfy, et al, 2016). LWC is very porous and therefore will easily allow the evaporation of moisture as compared to NWC, which is denser.…”

Section: Spallingmentioning

confidence: 99%

Fire Resistance Quantification of Non-Loadbearing Masonry Walls –Numerical Study

Keelson¹

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The fire behaviour of masonry elements has promoted a great deal of interest in building construction. Non-loadbearing masonry walls for instance, have a considerable capacity, from the fire perspective, to isolate part of the building's interior from flames, heat and the effect of smoke. This research focuses on quantifying the fire resistance of non-loadbearing masonry walls subjected to elevated temperatures. Masonry walls constructed with different joint profiles, material properties as well as geometries have been considered. The fire resistance of the walls under each category has been analyzed using a finite element model and compared with full-scale experimental fire resistance tests, which has been conducted in an earlier project by another author. vi 2.14 Methods of Improving the Fire Resistance of Concrete Masonry-Insulating Materials 74 2.14.1 Categorization of insulating materials based on their chemical composition ..........

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Durability properties of lightweight self-consolidating concrete developed with three types of aggregates

Cited by 70 publications

References 20 publications

High Strength Lightweight Strain-Hardening Cementitious Composite Incorporating Cenosphere

High Strength Lightweight Strain-Hardening Cementitious Composite Incorporating Cenosphere

Confinement of six different concretes in CFST columns having different shapes and slenderness

Fire Resistance Quantification of Non-Loadbearing Masonry Walls –Numerical Study

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