Experimental study on the influence of mixing time on concrete performance under different mixing modes

Zhao, Wang; Yang, Jing; Zhao, Wenjun; Yang, Chi

doi:10.1515/secm-2021-0061

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…The distribution of the cementitious components in the concrete mixture was homogenized as a result of this operation. To keep the homogeneity of all mixtures approximately the same, the mixing time was considered based on the results proposed by Zhao et al [61]. Furthermore, the mixtures were made approximately within a month and a half and at approximately the same time every day to consider the temperature difference.…”

Section: Concrete Mixture Preparation and Specimen Preparationmentioning

confidence: 99%

Examination of the Physical–Mechanical Properties of Sustainable Self-Curing Concrete Using Crushed Ceramic, Volcanic Powder, and Polyethylene Glycol

Etman,

Elshikh,

Kaloop

et al. 2024

Sustainability

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This study investigates the properties of sustainable self-curing concrete (SSC) by adding volcanic powder (VP), crushed ceramic (CC), and polyethylene glycol 6000 (PEG). VP and CC are prepared from volcanic ash, as a natural pozzolanic material, and construction waste, respectively. PEG is used as an inner-curing agent. Twenty-six concrete mixtures are prepared using VP at 5%, 10%, 15%, and 20%, CC at 50%, and PEG at 1%, 1.5%, and 2% and tested after 7, 28, and 56 days. Mechanical, workability, and durability characteristics are evaluated using different tests. The bond and cohesion between aggregates and mortar are tested using a scanning electron microscope (SEM). The results show that the optimum replacement mix for enhancing strengths, by producing C-S-H, of the studied SSC is 10% VP and 1.5% PEG. This improved the compressive, tensile, and flexural strengths of SSC by 54.5%, 60.7%, and 34.9%, respectively, compared to a reference mix. Adding CC enhances the compressive strength of SSC by 41.6% and 11.5% and decreases chloride penetration by 10% and 9.1% compared to control mixes. PEG improves the mechanical, workability, and durability characteristics of SSC even with the addition of 1%. The obtained results reveal the possibility of using VP and CC in producing SSC.

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Section: Concrete Mixture Preparation and Specimen Preparationmentioning

confidence: 99%

Examination of the Physical–Mechanical Properties of Sustainable Self-Curing Concrete Using Crushed Ceramic, Volcanic Powder, and Polyethylene Glycol

Etman,

Elshikh,

Kaloop

et al. 2024

Sustainability

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“…In the scientific work [2], the authors studied the influence of the mixing time and methods used for mixing cement on the homogeneity and mechanical characteristics of concrete cement. For the effective homogenization of the concrete components, the geometric characteristics of the mixer are essential.…”

Section: Introductionmentioning

confidence: 99%

Modelling Wear Phenomena Specific to Mixer Blades in Concrete Production Plants

Petrescu,

Popovici,

Niță

et al. 2024

Applied Sciences

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In the cement concrete manufacturing industry, mixers are critical pieces of equipment that play an essential role. Mixers ensure, by mechanically mixing the materials that make up the concrete, the homogeneity of the mixture. Since the active elements of the mixer in the concrete industry—the mixing blades—come into permanent contact with the mineral aggregates in the mixture formed by water and cement, they are permanently subjected to a strong abrasive–erosive wear process. The authors of this article were concerned with the establishment of tribological models for studying the wear of mixing blades, in order to identify the influence of their constructive parameters on the wear intensity. A complex model (Kraghelsky–Nepomnyashchi model) was adopted for the study. The modeling results revealed that the wear intensity decreases with an increasing blade angle of attack and increases linearly with increasing speed, as well as with an increasing friction coefficient. The modeling results confirm that the wear intensity is lowest when the mixing blade is inclined at a 60° angle, while the highest value is recorded for 30°. By identifying the angle at which the greatest wear of blades occurs, interventions can be made in the design of a more durable mixer (with the optimal installation angle of the mixer blades), thus requiring fewer corrective maintenance interventions. Based on these findings, we conclude that the complex model used in the experiment can provide a convenient and efficient tool for the study of erosive–abrasive phenomena.

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“…Their experimental results show that the arrangement of various components (including coarse and fine aggregates, cement particles) of MFA concrete produced using vibration mixing process with high-frequency is more dense, and each phase is also uniform. Zhao et al [9] produced MFA concrete by vibration mixing technology, comparing the properties of common concrete and MFA concrete, these results showed that while vibration stirring was used, the slump and air content of concrete mixture increased by 9.8% and 38.8% respectively. The above achievements indicate that the properties of machine-made sand concrete can be enhanced by vibration mixing technology, and has further research value.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Vibration Mixing on the Compressive Strength of C30 Manufactured Sand Concrete

Ma,

Zhang,

Han

et al. 2023

Advances in Transdisciplinary Engineering

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In order to improve the engineering application performance of artificial-sand concrete, C30 concrete is used as the sample in this paper, and studies the performances of machine-made sand concrete under ordinary mixer and vibratory mixer through comparative tests. Under the same mixing ratio, the artificial-sand completely replaces the common river sand. The test results show that the slump, expansion and air content of the sand concrete made by the vibratory mixer increase compared with the ordinary mixing. The slump deviation coefficient and evacuation time deviation coefficient of concrete under vibratory mixing are reduced, and the workability of artificial-sand concrete of vibratory mixer is more stable. The 7 day and 28 day compressive strength of artificial-sand concrete by vibrating mixer is 9.3% and 14.8% higher than that of artificial-sand concrete by ordinary mixer, respectively, and the coefficient of variation is smaller. The results show that vibratory mixing is an excellent process that inhance the compressive strength of artificial-sand concrete, which has engineering application value.

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Experimental study on the influence of mixing time on concrete performance under different mixing modes

Cited by 8 publications

References 4 publications

Examination of the Physical–Mechanical Properties of Sustainable Self-Curing Concrete Using Crushed Ceramic, Volcanic Powder, and Polyethylene Glycol

Examination of the Physical–Mechanical Properties of Sustainable Self-Curing Concrete Using Crushed Ceramic, Volcanic Powder, and Polyethylene Glycol

Modelling Wear Phenomena Specific to Mixer Blades in Concrete Production Plants

Study on the Influence of Vibration Mixing on the Compressive Strength of C30 Manufactured Sand Concrete

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