Assessment of Mechanical Properties of High Strength Concrete (Hsc) After Exposure to High Temperature

Drzymała, T.; Jackiewicz-Rek, W.; Gałaj, Jerzy; Šukys, Ritoldas

doi:10.3846/jcem.2018.457

Cited by 26 publications

(19 citation statements)

References 15 publications

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“…Studies on the fire performance of concrete have shown that, compared to building materials such as steel and wool, concrete demonstrates the best fire resistance [131]. The addition of reinforcements further increases the thermal stability of the concrete.…”

Section: Fire Propertiesmentioning

confidence: 99%

Biochar-Added Cementitious Materials—A Review on Mechanical, Thermal, and Environmental Properties

Mensah

Vigneshwaran

Narayanan³

et al. 2021

Sustainability

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The enhanced carbon footprint of the construction sector has created the need for CO2 emission control and mitigation. CO2 emissions in the construction sector are influenced by a variety of factors, including raw material preparation, cement production, and, most notably, the construction process. Thus, using biobased constituents in cement could reduce CO2 emissions. However, biobased constituents can degrade and have a negative impact on cement performance. Recently, carbonised biomass known as biochar has been found to be an effective partial replacement for cement. Various studies have reported improved mechanical strength and thermal properties with the inclusion of biochar in concrete. To comprehend the properties of biochar-added cementitious materials, the properties of biochar and their effect on concrete need to be examined. This review provides a critical examination of the mechanical and thermal properties of biochar and biochar-added cementitious materials. The study also covers biochar’s life cycle assessment and economic benefits. Overall, the purpose of this review article is to provide a means for researchers in the relevant field to gain a deeper understanding of the innate properties of biochar imparted into biochar-added cementitious materials for property enhancement and reduction of CO2 emissions.

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Section: Fire Propertiesmentioning

confidence: 99%

Biochar-Added Cementitious Materials—A Review on Mechanical, Thermal, and Environmental Properties

Mensah

Vigneshwaran

Narayanan³

et al. 2021

Sustainability

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“…It can be found almost anywhere in human existence. However, due to their brittle characteristics, concrete structures are prone to damage, especially cracks, under the influence of harsh environments, external loads, or fire [ 2 , 3 , 4 , 5 ]. The appearance and expansion of cracks can have a negative impact on the mechanical properties and durability of cement-based materials [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Electromagnetic-Induced Rupture Microcapsules for Self-Repairing Mortars

Zhuang

et al. 2022

Materials

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Cement-based materials are susceptible to internal cracks during service, leading to a reduction in their durability. Microcapsules can effectively self-repair cracks in cement-based materials. In this study, novel electromagnetic-induced rupture microcapsules (DWMs) were prepared by using the melt dispersion method with Fe3O4 nano-particles/polyethylene wax as the shell and epoxy resin as the repairing agent. The core fraction, compactness, particle size distribution, morphology, and chemical structure of DWMs were characterized. DWMs were subsequently incorporated into the mortar to measure the pore size distribution, compressive strength recovery, and maximum amplitudes of the pre-damaged mortar after self-repairing. DWMs were also evaluated for their ability to self-repair cracks on mortar surfaces. The results showed that the core fraction, remaining weight (30 days), and mean size of DWMs were 72.5%, 97.6 g, and 220 μm, respectively. SEM showed that the DWMs were regular spherical with a rough surface and could form a good bond with cement matrix. FTIR indicated that the epoxy resin was successfully encapsulated in the Fe3O4 nano-particles/polyethylene wax. After 15 days of self-repairing, the harmful pore ratio, compressive strength recovery, and maximum amplitude of the pre-damaged mortars were 48.97%, 91.9%, and 24.03 mV, respectively. The mortar with an initial crack width of 0.4–0.5 mm was self-repaired within 7 days. This indicated that the incorporation of DWMs can improve the self-repair ability of the mortar. This work is expected to provide new insights to address the mechanism of microcapsule rupture in self-repairing cement-based materials.

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“…Moreover, improved fracture toughness, impact resistance, ductility, tensile and bending capacity are leading to an increase in applications of polypropylene FRC [7,16,17]. Polypropylene fibres also increase thermal stability and improve the properties of concrete samples exposed to elevated temperatures [18][19][20]. Fibres are divided into two categories by their size, specifically, micro and macro fibres.…”

Section: Introductionmentioning

confidence: 99%

Axial Stress-Strain Performance of Recycled Aggregate Concrete Reinforced with Macro-Polypropylene Fibres

Munir

Kazmi

et al. 2021

Sustainability

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The addition of macro-polypropylene fibres improves the stress-strain performance of natural aggregate concrete (NAC). However, limited studies focus on the stress-strain performance of macro-polypropylene fibre-reinforced recycled aggregate concrete (RAC). Considering the variability of coarse recycled aggregates (CRA), more studies are needed to investigate the stress-strain performance of macro-polypropylene fibre-reinforced RAC. In this study, a new type of 48 mm long BarChip macro-polypropylene fibre with a continuously embossed surface texture is used to produce BarChip fibre-reinforced NAC (BFNAC) and RAC (BFRAC). The stress-strain performance of BFNAC and BFRAC is studied for varying dosages of BarChip fibres. Results show that the increase in energy dissipation capacity (i.e., area under the curve), peak stress, and peak strain of samples is observed with an increase in fibre dosage, indicating the positive effect of fibre addition on the stress-strain performance of concrete. The strength enhancement due to the addition of fibres is higher for BFRAC samples than BFNAC samples. The reduction in peak stress, ultimate strain, toughness and specific toughness of concrete samples due to the utilisation of CRA also reduces with the addition of fibres. Hence, the negative effect of CRA on the properties of concrete samples can be minimised by adding BarChip macro-polypropylene fibres. The applicability of the stress-strain model previously developed for macro-synthetic and steel fibre-reinforced NAC and RAC to BFNAC and BFRAC is also examined.

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Assessment of Mechanical Properties of High Strength Concrete (Hsc) After Exposure to High Temperature

Cited by 26 publications

References 15 publications

Biochar-Added Cementitious Materials—A Review on Mechanical, Thermal, and Environmental Properties

Biochar-Added Cementitious Materials—A Review on Mechanical, Thermal, and Environmental Properties

Preparation and Characterization of Electromagnetic-Induced Rupture Microcapsules for Self-Repairing Mortars

Axial Stress-Strain Performance of Recycled Aggregate Concrete Reinforced with Macro-Polypropylene Fibres

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