Compressive stress-strain model and residual strength of self-compacting concrete containing recycled ceramic aggregate after exposure to fire

Alizadeh, Seyed Mehrdad Mousavi; Rezaeian, Abbas; Rasoolan, Iraj; Tahmouresi, Behzad

doi:10.1016/j.jobe.2021.102206

Cited by 19 publications

(8 citation statements)

References 49 publications

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“…According to the literature, the durability of SCC or SCM based on the RBS is not well explored up to now [32,[42][43][44]. Therefore, this study intends to fill this gap and evaluates the feasibility of using RBS in SCM.…”

Section: Freeze-thaw Resistancementioning

confidence: 99%

Performance and durability of self-compacting mortar with recycled sand from crushed brick

Zhao¹,

Duan²,

Hubert³

et al. 2022

Journal of Building Engineering

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Section: Freeze-thaw Resistancementioning

confidence: 99%

Performance and durability of self-compacting mortar with recycled sand from crushed brick

Zhao¹,

Duan²,

Hubert³

et al. 2022

Journal of Building Engineering

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“…12,13 Concrete is a heterogeneous composite and multiphase material in which cementitious paste is used as a binder. 14 The bond between concrete components (especially between aggregates and cementitious matrix) can greatly impact the mechanical properties of concrete. [15][16][17] Researchers showed that the interface between the cementitious paste and the aggregate known as the interfacial transition zone (ITZ) is the weakest part of the concrete, which can have negative effects on the mechanical properties and durability of the concrete.…”

Section: Introductionmentioning

confidence: 99%

“…Concrete is a heterogeneous composite and multiphase material in which cementitious paste is used as a binder 14 . The bond between concrete components (especially between aggregates and cementitious matrix) can greatly impact the mechanical properties of concrete 15–17 .…”

Section: Introductionmentioning

confidence: 99%

Effect of pre‐coating lightweight aggregates on the self‐compacting concrete

Vahabi

Tahmouresi

Mosavi

et al. 2021

Structural Concrete

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The porous lightweight aggregates adversely affect fresh properties of concrete, including slump and disruption of pumping concrete. Besides, this type of concrete is very susceptible to shrinkage cracking. In this study, two types of lightweight aggregates were used with a combination of two types of coating, including hydrophobic polymers ‐polyvinyl acetate and styrene‐butadiene rubber coatings. The coatings were applied in single and double layers. For the fresh concrete, the fresh properties of concrete, including slump flow, T50, flow time, and L‐Box were evaluated and for the hardened concrete, compressive strength, flexural strength, tensile strength, water absorption and shrinkage was studied. It was seen that the slump flow of coated lightweight aggregates increased by 10%, and also coating process reduced the water absorption of the aggregates up to 82%. The compressive strength increased by up to 21% for the coated aggregates. Scanning electron microscopy was also used to investigate the microstructure of the mortar‐aggregate interface. Microstructural images showed a uniform and dense interfacial zone of cementitious matrix‐aggregate for coated lightweight aggregates. Moreover, an improvement of 50–150 μm in the interfacial zone's thickness was seen for coated aggregates compared to uncoated aggregates.

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“…A major risk to structures during their lifetime is fire. Drastic physicochemical changes occur in concrete as a result of fire [5][6][7], which lead to concrete degradation and deterioration. As a result, strength loss, cracking, and spalling occur in concrete.…”

Section: Introductionmentioning

confidence: 99%

“…Thermal material features with significant effects on the thermal performance of concrete structures include the thermal conductivity, expansion, and diffusivity, as well as the specific heat. Moreover, important mechanical features in this regard include the strength, elastic modulus, and deformation, in that they considerably affect the thermal performance of structural systems [5,6,8,9].…”

Section: Introductionmentioning

confidence: 99%

Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures

2021

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One commonly used cement type for thermal applications is CAC containing 38–40% alumina, although the postheated behavior of this cement subjected to elevated temperature has not been studied yet. Here, through extensive experimentation, the postheated mineralogical and physicochemical features of calcium aluminate cement concrete (CACC) were examined via DTA/TGA, X-ray diffraction (XRD), and scanning electron microscopy (SEM) imaging and the variation in the concrete physical features and the compressive strength deterioration with temperature rise were examined through ultrasonic pulse velocity (UPV) values. In addition, other mechanical features that were addressed were the residual tensile strength and elastic modulus. According to the XRD test results, with the temperature rise, the dehydration of the C3AH6 structure occurred, which, in turn, led to the crystallization of the monocalcium dialuminate (CA2) and alumina (Al2O3) structures. The SEM images indicated specific variations in morphology that corresponded to concrete deterioration due to heat.

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Compressive stress-strain model and residual strength of self-compacting concrete containing recycled ceramic aggregate after exposure to fire

Cited by 19 publications

References 49 publications

Performance and durability of self-compacting mortar with recycled sand from crushed brick

Performance and durability of self-compacting mortar with recycled sand from crushed brick

Effect of pre‐coating lightweight aggregates on the self‐compacting concrete

Physicochemical, Mineralogical, and Mechanical Properties of Calcium Aluminate Cement Concrete Exposed to Elevated Temperatures

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