Experimental Investigation on Bond, Microstructure and Durability of Expired Hardened Cement Blended with Ground Granulated Blast Furnace Slag as Partial Replacement of Cement in High-Strength Concrete

Chofore, Ashenafi Tofu; Mitikie, Bahiru Bewket; Haile, Abenezer Tariku

doi:10.1186/s40069-022-00560-6

Cited by 10 publications

(4 citation statements)

References 18 publications

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“…The GGBS provided by Hoa Phat Dung Quoc Steel., JSC improves the workability of the concrete mixture due to its smooth surface [12]. Moreover, GGBS enhances the paste coating around fine aggregate particles, reducing internal friction between particles, thereby improving the workability of the concrete mixture [13]. This aids in the even dispersion of carbon black in the concrete mixture.…”

Section: Raw Materials and Specimen Preparationmentioning

confidence: 99%

Compression self-sensibility of the concrete using high content carbon black with various measurement conditions

Chi,

Lan,

Hai

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Self-sensing concrete (SSC) is a smart material created by dispersing a conductive filler into the concrete. This helps to increase the resistivity variation of concrete when the microstructure of the material changes under the effect of load. Thus, the stress, strain or damage of the concrete can be sensed by resistivity measurements of the concrete itself. This study aims to clarify the effects of parameters related to the measurement method on the self-sensibility of SSC. SSC specimens were prepared using carbon black with 7% volumetric content. A series of compression tests were conducted to investigate the relationship between the resistivity variation and the applied load of different test specimens in terms of excitation voltage, electrode distance and specimen size. The results show that the excitation voltage need to be large enough to generate a current of suitable stability when measuring the self-sensibility of SSC. The resistivity of all specimens decreased with increasing compressive load on the SSC specimen. The larger the specimen size and the smaller the electrode distance, the more pronounced the resistivity variation.

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Section: Raw Materials and Specimen Preparationmentioning

confidence: 99%

Compression self-sensibility of the concrete using high content carbon black with various measurement conditions

Chi,

Lan,

Hai

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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“…To address this issue, in addition to the preblending mentioned in Section 3.2, GGBS and superplasticizers were employed. The GGBS provided by Hoa Phat Dung Quoc Steel, JSC enhances the workability of the mortar mixture due to its smooth surface (Chofore et al 2022). Moreover, GGBS enhances the coating of paste around fine aggregate particles, reducing internal friction between particles and improving the workability of the concrete mixture (Xiang et al 2012; Feng et al 2022.…”

Section: Raw Materials and Mixture Designmentioning

confidence: 99%

Stress Self-sensitivity of Carbon Black-filled Mortar under Nondestructive Compression and the Effects of Electric Circuit and Specimen Dimensions

Chi,

Hai,

Lan

et al. 2023

ACT

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Cement-based materials with self-sensing capabilities have the potential to be used as compression load cells in various applications. This study aims (i) to clarify the change in resistivity in self-sensing mortar (SSM) under nondestructive compressive stress and the underlying mechanism of this change, (ii) to examine the effects of different conditions such as electric circuit and specimen dimension on this relationship. The study involved SSM specimens containing 7% carbon black powder with various parameters, including excitation voltage, intermediate resistor for the electric circuit, and electrode distance, dimensions of the cube SSM specimen. Additionally, scanning electron microscopy (SEM) observations were performed to investigate the dispersion of carbon black in the cementitious matrix. SEM observations reveal the agglomeration and dispersion of carbon black within the cementitious matrix, creating a conductive network in SSM. The measurement results showed the resistivity change was nonlinear but displayed nearly linear behavior within a specific range of compressive stress. The slope of this change increased with larger specimen cross-section, shorter electrode distance, and a smaller value for the intermediate resistor in the electric circuit. A regression analysis was conducted to predict the change in resistivity of SSM under nondestructive compressive stress, while taking these effects into account.

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“…Hence, 9.54% and 15.94% of enhancement in bond strength were recorded at 15% and 20%, respectively. On the other hand, the reduction in bond strength was recorded at 25% and 30% of expired hardened cement (EHC) blended with GGBS, with negative percent reductions of 0.82% and 2.99%, respectively [33].…”

Section: Bond Stress (Pullout)mentioning

confidence: 99%

“…As a result, in the mix with a 20% blend of EHC and GGBS, the extent of the void is lower as compared to the control mix, and this shows that the incorporation of blended EHC and GGBS in concrete fills the void between hydrated particles and helps for densification of the microstructure. This leads to a higher density in the concrete [33].…”

Section: Bond Stress (Pullout)mentioning

confidence: 99%

Mechanical and Microstructural Properties of Bamboo Fiber-Reinforced Concrete Containing a Blend of Waste Marble Powder and Waste Glass Powder

Gelanew,

Demiss

2023

Advances in Civil Engineering

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Using blended supplementary cementitious materials in the production of concrete has a contribution to make in reducing cement consumption, as well as having a negative environmental impact. The main objective of this study was to investigate the mechanical and microstructural properties of bamboo fiber-reinforced concrete containing a blend of waste marble powder (WMP) and waste glass powder (WGP) as a partial replacement for cement. To achieve these objectives, the physical and chemical properties of concrete ingredients were studied. The design mix was done as per the American Concrete Institute (ACI) mixing procedure by using 5%, 10%, 15%, and 20% blended WMP and WGP as a replacement for cement and 0.75% bamboo fiber as an addition. The mechanical tests were conducted after samples were cured for 7 and 28 days in water. The microstructural properties of the hardened concrete from three different mixes were also determined for the 28-day cured specimens. The study result indicated improvement in compressive strength, shear stress, and bond stress at M2 (10%), whereas maximum splitting tensile strength was achieved at M1 (5%). Moreover, scanning electron microscopy (SEM) showed a denser microstructure, whereas X-ray diffraction (XRD) illustrated portlandite, calcium aluminum silicate, quartz, and calcium silicate hydrate as common phases of the concrete structure. Eventually, the experimental finding implied that using a 10% blend of WMP and WGP as a partial replacement for cement and 0.75% bamboo fiber improves fresh and hardened concrete properties.

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Experimental Investigation on Bond, Microstructure and Durability of Expired Hardened Cement Blended with Ground Granulated Blast Furnace Slag as Partial Replacement of Cement in High-Strength Concrete

Cited by 10 publications

References 18 publications

Compression self-sensibility of the concrete using high content carbon black with various measurement conditions

Compression self-sensibility of the concrete using high content carbon black with various measurement conditions

Stress Self-sensitivity of Carbon Black-filled Mortar under Nondestructive Compression and the Effects of Electric Circuit and Specimen Dimensions

Mechanical and Microstructural Properties of Bamboo Fiber-Reinforced Concrete Containing a Blend of Waste Marble Powder and Waste Glass Powder

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