Investigation of Rheological Behavior of Self-Compacting and High Performance Composite Concretes

Bispo, Rodrigo Andraus; Vicente, Gabriela Oliveira; Júnior, Gean Pereira da Silva; Benjamim, Daniel Ukuessunga; Alcântara, Marco Antônio de Morais

doi:10.1590/1980-5373-mr-2021-0264

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…The formulation of selfconsolidating concrete (SCC) necessitates careful consideration to mitigate issues such as segregation, excessive bleed water, and the sedimentation of the coarse particles [27,36,37]. The resistance of SCC to frost and frost-thawing compounds can be enhanced through the incorporation of air entrainment [38,39].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Self-Compacting Concrete with Use of Artificial Aggregate and Partial Replacement of Cement by Fly Ash

Patil,

Jayale,

Arunachalam

et al. 2024

Buildings

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Artificial aggregate (AF), i.e., silico manganese (SiMn) slag aggregate, is a byproduct of ferromanganese and silico manganese alloy production. The utilization of industrial waste and industrial byproducts in construction has increased the aim of conserving natural resources to nurture a pollution-free environment. The current study examines the performance of the use of artificial aggregate (AF) and partial replacement of cement with fly ash (FA). The properties of fresh concrete, as well as the compressive and flexural strength and split tensile strength of concrete were evaluated. Seven mix proportions were prepared for M30-grade concrete. The first was a control mix (with 0% AF and FA), three other mixes contained varying amounts of AF (20%, 40%, and 60%) as a partial replacement of CA with AF. The average compressive strength of the control SCC was found to be 32.87 MPa (megapascals) at the age of 28 days, and after replacing 20% natural aggregate with artificial aggregate, the compressive strength increased by 8.27%, whereas for 40% and 60% replacement, it decreased by 4.46% and 12.55%, respectively. Further investigation was performed on the optimum value obtained by replacing 20% of CA with AF. At this percentage, cement was replaced by FA at (15%, 25%, and 35%) where at 15%, the average compressive strength increased by 7.41%, whereas for 25% and 35% replacement, it decreased by 7.47% and 17.19%, respectively. For SCAF20 and SCF15, all strengths were at maximum due to the increase in its density. The findings show that the development of advanced construction materials is environmentally sustainable.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of Self-Compacting Concrete with Use of Artificial Aggregate and Partial Replacement of Cement by Fly Ash

Patil,

Jayale,

Arunachalam

et al. 2024

Buildings

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“…Many researchers have launched a series of experimental studies on the flowability of SCC and the casting process of steel shell-immersed tube tunnels. For example, Wang [19] studied the working performance of SCC with different mineral admixtures and examined the influence of concrete casting speed and the number of outlets on the compactness of the chamber; Rodrigo Andraus [20] studied the effects of admixtures on the flowability of SCC; and R. Zerbino [21] investigated the effects of external factors (like concrete temperature and environmental exposure conditions) on the flow properties of SCC and determined the yield stress and plastic viscosity of different types of SCC. However, casting these large volumes of concrete is difficult to complete during the experimental conditions and is a significant waste of manpower and resources.…”

Section: Introductionmentioning

confidence: 99%

Casting Simulation of Large-Volume Fluid Cementitious Materials: Effect of Material Properties and Casting Parameters

Wang,

Song,

et al. 2023

Materials

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The increasing pressure of traffic congestion on socio-economic development has made the construction of cross-water transportation ever more crucial. The immersed tunnel method is among the most extensively employed. However, a critical challenge of the immersed tunnel technique is to ensure the compactness and stability of concrete during the casting process. Conventional laboratory methods face challenges in achieving large-volume concrete casting, resulting in the notable waste of human and material resources. Hence, this study employs a simulation approach to investigate the casting parameters and the fresh properties of concrete, exploring their impacts on concrete stability and compactness. The results indicate that when the surface tension of concrete exceeds 0.03 N/m, and the yield stress and plastic viscosity are 50 Pa and 50 Pa·s, respectively, the concrete exhibits excellent casting compactness. A design incorporating three large and six small outlets, paired with a casting speed of 3 cm/s, achieves superior compactness. Additionally, when the yield stress of concrete exceeds 3 Pa, there is no segregation of aggregates. In cases where segregation occurs, the thixotropic property of the cement paste contributes to a significant reduction in the velocity of aggregate segregation.

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“…Porous structure of AABFC concrete in one's turn is caused by technological factors such as consistency of fresh concrete, form (state) of alkaline component, curing conditions, etc. The modern requirements to consistency fresh concretes are governed by practice [51][52][53][54][55]. Consistency of fresh concrete is regulated by surfactants.…”

Section: Introductionmentioning

confidence: 99%

Sustainable performance of alkali-activated blast furnace cement concrete with high freeze-thaw resistance

Krivenko,

Rudenko,

Konstantynovskyi

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The application of blast furnace cements with minor clinker constituent is an actual task due to their conformity with modern tendencies of sustainable development. The alkali metal compounds were proposed to increase activity of CEM III/C. The aim of the research was to investigate the effects of technological factors on porous structure of alkali-activated blast furnace cement concrete (further, AABFC concrete) to ensure its sustainable performance by criterium of freeze-thaw resistance in NaCl solution. The effects of fresh concrete consistency, aggregate state of alkaline component and curing conditions on sustainability of AABFC concrete were investigated. Increasing of fresh concrete consistency from class S1 up to class S4 due to chemical plasticization as well as application of alkaline component in dry form, in contrast to liquid form, ensures negative changes in porous structure of AABFC concrete. These changes cause decreasing of freeze-thaw resistance from mark F500 down to F200. It was revealed that hardening of plasticized AABFC concrete under normal conditions (t = 20±2 ° C, RH = 95±5%), compared with hardening in water or under steam curing (t = 85±5 ° C), ensures more effective porous structure which causes maintained freeze-thaw resistance of F300 in contrast to F200 and F250 agreeable.

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Investigation of Rheological Behavior of Self-Compacting and High Performance Composite Concretes

Cited by 4 publications

References 7 publications

Performance Analysis of Self-Compacting Concrete with Use of Artificial Aggregate and Partial Replacement of Cement by Fly Ash

Performance Analysis of Self-Compacting Concrete with Use of Artificial Aggregate and Partial Replacement of Cement by Fly Ash

Casting Simulation of Large-Volume Fluid Cementitious Materials: Effect of Material Properties and Casting Parameters

Sustainable performance of alkali-activated blast furnace cement concrete with high freeze-thaw resistance

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