Comparison between the effects of superfine steel slag and superfine phosphorus slag on the long-term performances and durability of concrete

Hu, Jin

doi:10.1007/s10973-017-6107-9

Cited by 70 publications

(32 citation statements)

References 40 publications

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“…is result is consistent with previous studies [21,23]. It is noteworthy that although the cumulative pore volumes of hardened pastes PS1 and PS2 are higher than that of hardened paste PC, the proportions of pores larger than 50 nm in hardened pastes PS1 and PS2 are close to that of hardened paste PC, which may be attributed to the high hydration degree of steel slag powder.…”

Section: Pore Structuressupporting

confidence: 92%

“…Additionally, the nonevaporable water content of the hardened paste containing fine steel slag powder is close to that of hardened plain cement paste at late ages [20,21]. Due to the negative influence of steel slag powder on the compressive strength, the chloride-ion penetration resistance, carbonation resistance, and sulfateattack resistance of concrete, the cement replacement ratio should not be very high [21][22][23].…”

Section: Introductionmentioning

confidence: 87%

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Applications of Steel Slag Powder and Steel Slag Aggregate in Ultra‐High Performance Concrete

Liu

Guo

2018

Advances in Civil Engineering

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e applications of steel slag powder and steel slag aggregate in ultra-high performance concrete (UHPC) were investigated by determining the fluidity, nonevaporable water content, and pore structure of paste and the compressive strength of concrete and by observing the morphologies of hardened paste and the concrete fracture surface. e results show that the fluidity of the paste containing steel slag is higher. e nonevaporable water content of the hardened paste containing steel slag powder is close to that of the control sample at late ages. Both steel slag powder and steel slag aggregate react and connect tightly to gels and hardened paste, respectively. When the cement replacement ratio is no more than 10%, the proportion of pores larger than 50 nm in the hardened paste containing steel slag powder is close to that of the control sample, and the UHPC containing steel slag powder can display satisfactory compressive strengths. e UHPC containing steel slag aggregate demonstrates higher compressive strengths.

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Section: Pore Structuressupporting

confidence: 92%

Section: Introductionmentioning

confidence: 87%

Applications of Steel Slag Powder and Steel Slag Aggregate in Ultra‐High Performance Concrete

Liu

Guo

2018

Advances in Civil Engineering

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“…e cumulative heat releases of O100, O50B50, B75D10G15, B78D10G12, B81D10G9, and B80D20 mixes were 301.4 J/g (100%), 211.7 J/g (70.2%), 109.4 J/g (36.3%), 97.9 J/g (32.5%), 82.3 J/g (27.3%), and 69.1 J/g (22.9%), respectively. us, the alkali-activated system with BFS, DS, and G can be useful in lowering the hydration heat when applying mass concrete because its hydration heat is relatively lower compared to that of O100 mix [28,40,41]. Figure 6 shows the XRD patterns of O100, O50B50, B80D20, and B75D10G15 samples after 28 days.…”

Section: Heat Of Hydrationmentioning

confidence: 99%

Compressive Strength and Microstructure Properties of Alkali-Activated Systems with Blast Furnace Slag, Desulfurization Slag, and Gypsum

Cho

Koo²,

Choi

2018

Advances in Civil Engineering

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This study investigates the effect of desulfurization slag (DS) and gypsum (G) on the compressive strength and microstructure properties of blast furnace slag-(BFS-) based alkali-activated systems. DS is produced in a Kambara reactor process of molten iron produced in a steel production process. DS contains CaO, SiO2, Fe2O3, and SO3 and is composed of Ca(OH)2 and 2CaO·SiO2 as main compounds. In this investigation, the weight of BFS was replaced by DS at 5, 10, 15, 20, 25, and 30%. In addition, G was also applied at 9, 12, and 15% by weight of BFS to improve the compressive strength of the alkali-activated system with BFS and DS. According to this investigation, the compressive strength of the alkali-activated mixes with BFS and DS ranged from 14.9 MPa (B95D5) to 19.8 MPa (B90D10) after 91 days. However, the 28 days compressive strength of the alkali-activated mixes with BFS, DS, and G reached 39.1 MPa, 45.2 MPa, and 48.4 MPa, respectively, which were approximately 78.8 to 97.5% of that of O100 mix (49.6 MPa). The main hydrates of the BFS-DS (B80D20) binder sample were Ca(OH)2, CaCO3, and low-crystalline calcium silicate hydrates, while the main hydration product of BFS-DS-G (B75D10G15) binder was found as ettringite. The use of BFS-DS-G binders would result in the value-added utilization of steel slag and provide an environmentally friendly construction material, and contribute to a reduction of CO2 in the cement industry.

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“…Extensive research has been devoted to the properties of mortars or concretes with SS incorporated, and the results indicate that SS is advantageous in terms of the mechanical strength and durability of the hardened mortars and concretes [13][14][15][16][17][18][19][20][21]. Tsakiridis et al [8] found that SS cement consisting of 10.5 % SS in the raw meal showed comparable properties to the reference sample in terms of the setting time and compressive strength.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Steel Slag With Variable Particle Size Distribution on the Workability and Mechanical Properties of Concrete

Zang¹

2018

Ceramics - Silikaty

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The present research investigated the influence of steel slag (SS) with variable particle size on the workability and mechanical properties of concrete. Different SS size ranges (0-15 μm, 15-30 μm, 30-45 μm and 45-80 μm) were obtained by sieving and then were characterised by a laser particle size analyser and a scanning electron microscope (SEM). The slump, compressive strength, pore structures and thermal analysis were used to evaluate the effect of the SS particle size on cement and concrete properties. The experimental results showed that finer SS (0-15 μm and 15-30 μm) resulted in negative effects on the workability, while 30-45 μm and 45-80 μm SS particles presented completely opposite results. Both of these effects were more apparent as the steel slag replacement ratio was increased up to 30 wt. %. Concrete samples with 0-15 μm and 45-80 μm SS particles presented comparable 7-and 28-day compressive strength to the control concrete when their replacement ratios were less than 10 wt. %. Moreover, the concrete samples with 45-80 μm SS particles at 5 % dosage developed the highest compressive strengths at 7 and 28 days, which were 2 % and 5 % higher than the control sample, respectively. The pore structure results indicated that a composition of 5 % 45-80 μm SS particles was advantageous for refining the pore structures of cement paste, further contributing to the 28-day compressive strength development of concrete.

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Comparison between the effects of superfine steel slag and superfine phosphorus slag on the long-term performances and durability of concrete

Cited by 70 publications

References 40 publications

Applications of Steel Slag Powder and Steel Slag Aggregate in Ultra‐High Performance Concrete

Applications of Steel Slag Powder and Steel Slag Aggregate in Ultra‐High Performance Concrete

Compressive Strength and Microstructure Properties of Alkali-Activated Systems with Blast Furnace Slag, Desulfurization Slag, and Gypsum

The Influence of Steel Slag With Variable Particle Size Distribution on the Workability and Mechanical Properties of Concrete

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