Microstructure, electrical and mechanical properties of steel fibres reinforced cement mortars with partial metakaolin and limestone addition

Alvarez, Graciela Lopez; Nazari, Ali; Bagheri, Ali; Sanjayan, Jay; Lange, Christo de

doi:10.1016/j.conbuildmat.2016.12.170

Cited by 33 publications

(11 citation statements)

References 24 publications

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“…This indicates that calcined clay has the potential to show higher pozzolanic reactivity than FA. Increase in compressive strength of mortar blending at an early age was also observed by using metakaolin as SCM [48,58,59]. Furthermore, combination of limestone and metakaolin resulted in higher compressive strength compared to using typical OPC [58].…”

Section: Supplementary Cementitious Materials (Scm)mentioning

confidence: 74%

“…Increase in compressive strength of mortar blending at an early age was also observed by using metakaolin as SCM [48,58,59]. Furthermore, combination of limestone and metakaolin resulted in higher compressive strength compared to using typical OPC [58]. Avet et al stated that compressive strength of mortars containing different types of calcined clay appeared mainly dependent on the calcined kaolinite content irrespective to the other parameters [59].…”

Section: Supplementary Cementitious Materials (Scm)mentioning

confidence: 95%

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Natural Kenaf Fiber and LC3 Binder for Sustainable Fiber-Reinforced Cementitious Composite: A Review

Baghban

Mahjoub

2020

Applied Sciences

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Low impact on the environment and low cost are the key drivers for today’s technology uptake. There are many concerns for cement production in terms of negative environmental impact due to greenhouse gas (GHG) emission, deficiency of raw materials, as well as high energy consumption. Replacement of the cement by appropriate additives known as supplementary cementitious materials (SCMs) could result in reduction in GHG emission. Limestone-calcined clay cement (LC3) is a promising binder in the concrete sector for its improvements to environmental impact, durability, and mechanical properties. On the other hand, the advantages of fiber-reinforced concrete such as improved ductility, versatility, and durability have resulted in increasing demand for this type of concrete and introduction of new standards for considering the mechanical properties of fibers in structural design. Thus, using natural fibers instead of synthetic fibers can be another step toward the sustainability of the concrete industry, which is facing increasing demand for cement-based materials. This review studies the potential of natural Kenaf fiber-reinforced concrete containing LC3 binder as a step toward green cementitious composite. While studies show that energy consumption and GHG emission can be reduced and there is a significant potential to enhance mechanical and durability properties of concrete using this composition, adjustment of the mix design, assessing the long-term performance and standardization, are the next steps for the use of the material in practice.

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Section: Supplementary Cementitious Materials (Scm)mentioning

confidence: 74%

Section: Supplementary Cementitious Materials (Scm)mentioning

confidence: 95%

Natural Kenaf Fiber and LC3 Binder for Sustainable Fiber-Reinforced Cementitious Composite: A Review

Baghban

Mahjoub

2020

Applied Sciences

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“…The first phase of deflection corresponding to the panel remains un-cracked. The second phase describes the post-yielding phase [ 26 ]. The curves of load versus mid-span deflection of the tested ferrocement panels in this study resemble those stated in past investigations [ 27 , 28 , 29 , 30 , 31 ].…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Structural Behavior of Fibrous-Ferrocement Panel Subjected to Flexural and Impact Loads

et al. 2020

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Ferrocement panels, while offering various benefits, do not cover instances of low and moderated velocity impact. To address this problem and to enhance the impact strength against low-velocity impact, a fibrous ferrocement panel is proposed and investigated. This study aims to assess the flexural and low-velocity impact response of simply supported ferrocement panels reinforced with expanded wire mesh (EWM) and steel fibers. The experimental program covered 12 different ferrocement panel prototypes and was tested against a three-point flexural load and falling mass impact test. The ferrocement panel system comprises mortar reinforced with 1% and 2% dosage of steel fibers and an EWM arranged in 1, 2, and 3 layers. For mortar preparation, a water-cement (w/c) ratio of 0.4 was maintained and all panels were cured in water for 28 days. The primary endpoints of the investigation are first crack and ultimate load capacity, deflection corresponding to first crack and ultimate load, ductility index, flexural strength, crack width at ultimate load, a number of impacts needed to induce crack commencement and failure, ductility ratio, and failure mode. The finding revealed that the three-layers of EWM inclusion and steel fibers resulted in an additional impact resistance improvement at cracking and failure stages of ferrocement panels. With superior ultimate load capacity, flexural strength, crack resistance, impact resistance, and ductile response, as witnessed in the experiment program, ferrocement panel can be a positive choice for many construction applications subjected to repeated low-velocity impacts.

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“…Figure 3(d) shows the effect of metakaolin and limestone contents on the reaction degree of cement. When metakaolin and limestone are used to replace partial cement, the reaction degree of cement is improved due to the dilution effect and nucleation effect (the dilution effect is considered through parameter λ 2 in equation 1, and the nucleation effect is considered through equations (4) and (5)). Similar to the contents shown in Figure 3(d), Lam et al [25] also found that the addition of mineral admixtures can improve the reaction degree of cement.…”

Section: Verifications Of Proposed Modelsmentioning

confidence: 99%

“…Vance et al [4] found that the synergetic effect of limestone and MK incorporation can improve early-age properties and maintain late-age properties of concrete. Alvarez et al [5] presented that combined mixtures of limestone and MK enhance compressive strength compared with 100% Portland cement concrete. Ramezanianpour and Hooton [6] presented that carboaluminate hydrates are formed for cement-limestone-MK ternary blends, and there is an optimum level of limestone in terms of the maximum strength and minimum porosity.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Hydration and Optimal Strength Combinations of Cement-Limestone-Metakaolin Ternary Composite

Wang

2019

Advances in Materials Science and Engineering

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Metakaolin (MK) is an aluminosilicate pozzolan material and can contribute to property development of concrete due to the pozzolanic reaction. Limestone (LS) powder presents the dilution effect, nucleation effect, and chemical effect on hydration of cement. When metakaolin and limestone are used together, due to the additional chemical reaction between the aluminum phase in MK and limestone, the synergetic benefit can be achieved. This study presents a hydration model for cement-limestone-metakaolin ternary blends. Individual reactions of cement, metakaolin, and limestone are simulated separately, and the interactions among cement hydration, limestone reaction, and metakaolin reaction are considered through the contents of calcium hydroxide and capillary water. The hydration model considers the pozzolanic reaction of metakaolin, chemical and physics effects of limestone, and synergetic effect between metakaolin and limestone. Furthermore, the gel-space ratio of hydrating concrete is calculated using reaction degrees of binders and concrete mixtures. The strength development of ternary blends is evaluated using the gel-space ratio. Based on parameter analysis, the synergetic effect on strength development is shown and the optimal combinations of cement-limestone-metakaolin ternary blends are determined.

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Microstructure, electrical and mechanical properties of steel fibres reinforced cement mortars with partial metakaolin and limestone addition

Cited by 33 publications

References 24 publications

Natural Kenaf Fiber and LC3 Binder for Sustainable Fiber-Reinforced Cementitious Composite: A Review

Natural Kenaf Fiber and LC3 Binder for Sustainable Fiber-Reinforced Cementitious Composite: A Review

Structural Behavior of Fibrous-Ferrocement Panel Subjected to Flexural and Impact Loads

Analysis of Hydration and Optimal Strength Combinations of Cement-Limestone-Metakaolin Ternary Composite

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