Utilization of micro copper slag in SCC subjected to high temperature

Afshoon, Iman; Sharifi, Yasser

doi:10.1016/j.jobe.2019.101128

Cited by 24 publications

(15 citation statements)

References 48 publications

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“…Excessive CS can instead cause increased free water in the mixture and increased pores, resulting in reduced freeze–thaw resistance of CBMs. Afshoon and Sharifi [ 106 ] investigated the high-temperature behavior of self-compacting concrete after adding CS. When CS was used to replace 5% cement, self-compacting concrete performed best at all temperatures.…”

Section: Durabilitymentioning

confidence: 99%

A Review of the Influence of Copper Slag on the Properties of Cement-Based Materials

Jin

Chen

2022

Materials

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Global copper slag (CS) emissions reached 57.2 million tons in 2021. Despite the increasing reuse of CS, the treatment of CS is still dominated by landfill so far, which not only occupies land resources but also causes damage to the environment. The application of CS to cement-based materials (CBMs) is one of the main approaches to its comprehensive utilization and has important economic and social implications. This article reviews the physicochemical properties, activity excitation, and heavy metal leaching properties of CS and summarizes the effect of CS on the working properties, mechanical properties, and durability of CBMs. At the end of the article, the existing problems in the research are analyzed, and the development trend is proposed, which provides technical guidance and reference for further research and application of CS in CBMs in the future.

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Section: Durabilitymentioning

confidence: 99%

A Review of the Influence of Copper Slag on the Properties of Cement-Based Materials

Jin

Chen

2022

Materials

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“…Authors has suggested 5% GCS is best and needs more studies on durabilities of concrete specimens. Cement replacing with GCS causes decline in STS at high temperature (Afshoon and Sharifi, 2019). It is observed that compressive strength of cement mortars (CM) increases as the CS quantity increases and slightly decreases beyond 50% CS content.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous studies have been carried out to investigate the effect of CS on concrete specimens, for example studying the effect of CS in cement mortar and concrete (Madheswaran et al, 2014 andAl Jabri (2006), the effect of ground CS as binding material in SCC subjected to high temperature (Afshoon and Sharifi, 2019), CS as fine aggregate in high performance concrete (Al Jabri, 2006), performance of high strength concrete with CS as fine aggregate (Al- Jabri et al, 2009) and mechanical properties and durability of concrete with water cooled CS aggregate (Maria, 2017). However, there is lack of data on performance of concrete made with CS as fine aggregates after exposure to elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

Post-thermal properties of Portland cement concrete made with copper slag as fine aggregates

Suresh¹,

Manjunatha²

2021

JSFE

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Purpose The purpose of this paper is to investigate the effect of elevated temperature on mechanical and physical properties of concrete specimens obtained by substituting the river sand with copper slag (CS) at proportions of 25%, 50%, 75% and 100%. The specimens were heated in an electric furnace up to 100, 200, 300, 400, 500 and 600 C and kept at these temperatures for 2 h duration. After the specimens were cooled in the furnace, mass loss, ultrasonic pulse velocity (UPV), compressive strength, split tensile strength (STS), flexural strength (FS) and modulus of elasticity (MOE) values were determined. No spalling occurred in the specimens after subjected to elevated temperature. The surface cracks were observed only in specimens exposed to 600 C. The maximum reduction in compressive strength and STS at 600C is 50.3% and 36.39% for referral mix (NC), 18% and 16% for specimens with 100% CS (MCS4). The reduction in MOE of specimens is observed to be high as copper slag content increases with increasing temperature. Scanning electron microscopy (SEM) studies are carried out to examine the changes in micro-structures of specimens after exposed to elevated temperatures. Design/methodology/approach After casting of concrete specimens, it is cured for 28 days. After attainment of 28 days age, the concrete specimens is taken out from the curing tank and allowed to dry for 2 days to remove any moisture content in the specimens to prevent explosive spalling during the time of heating. The prepared concrete specimen is subjected to temperatures of 100°C, 200°C, 300°C, 400°C, 500°C and 600°C up to 2 h duration. The physical test, mechanical test and SEM studies are carried out after cooling of specimens to room temperature (RT). The quality of concrete specimens is measured by conducting UPV test after cooling to RT. Findings The post-thermal strength properties of concrete specimens with copper slag contents are higher than referral mix concrete. The reduction of MOE of concrete specimens is more with incremental in copper slag content with increase in temperatures. Furthermore, the quality of concrete specimens is ranging from “good to medium” up to 500C temperatures based on UPV test. Originality/value In this research work, the natural sand is fully replaced with copper slag materials in the concrete mixes. The post-thermal strength properties like residual compressive strength, residual STS, residual FS and residual MOE is higher than referral mix after subjected to elevated temperature conditions. Higher density and toughness properties of copper slag materials will contribute to concrete strength. The effect of elevated temperature is more on MOE of concrete specimens having higher copper slag contents when comparing to specimens compressive strength.

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“…The SCC is a special type of concrete that settles in the mold without the need for operator and vibration through its own weight. SCC was first applied in Japan in the 1980s, in order to reduce costs and improve the quality of the concrete industry [21,[28][29][30][31][32]. Although, the materials used in the mix are the same both SCC and conventional concrete, the mixing and the composition are different from each other.…”

mentioning

confidence: 99%

“…Withal, the increase of cement usage, which increased the cement production, also, endangers the environment with huge amount of carbondioxide (CO 2 ) emission. Furthermore, the cement production consumes energy between 110 and 120 kW [28,33,34]. A more environment friendly cement type is necessary to use in concrete technology.…”

mentioning

confidence: 99%

High Temperature Performance of Self-Compacting Concrete Containing Boron Active Belite Cement

Aydın

Öz

Gök

et al. 2021

Architecture, Civil Engineering, Environment

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Concrete generally consists of cement, water and aggregate. The cement constitutes about 30% of concrete by volume. Therefore, the varying cement composition plays a crucial role in the behavior of concrete. Since the reinforced concrete (RC) structures could be exposed to very different climatic conditions, as a result of geographic location and altitude, it is important to evaluate the performance of cement based composites [1][2][3]. Cement is widely used in concrete applications such as: bridges, dams, cohesionless soil grouting, cement-based mortar, drainage channels, and foundation planning and tunnels as well as RC structures. The binding ability of cement provided a compact system between coarse and fine aggregates in the concrete mix [4][5][6][7]. The cementbased materials (such as fly ash, silica fume, polymers, blast furnace slag, and etc.) have been used to improve the characteristic properties of cementing system. Besides, the water/binder and curing time significantly affect the rheological and mechanical properties of the composite [6][7][8][9][10][11]. Temperature variation causes major problems for cement, mortar, and concrete due to the accelerated hydration of conventional cements and the rapid evaporation of mixing water. High tem-

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Utilization of micro copper slag in SCC subjected to high temperature

Cited by 24 publications

References 48 publications

A Review of the Influence of Copper Slag on the Properties of Cement-Based Materials

A Review of the Influence of Copper Slag on the Properties of Cement-Based Materials

Post-thermal properties of Portland cement concrete made with copper slag as fine aggregates

High Temperature Performance of Self-Compacting Concrete Containing Boron Active Belite Cement

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