Influence of classified steel slag with particle sizes smaller than 20 μm on the properties of cement and concrete

Wang, Qiang; Mengxiao, Shi; Yang, Jinlong

doi:10.1016/j.conbuildmat.2016.07.042

Cited by 111 publications

(31 citation statements)

References 28 publications

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“…e early autogenous shrinkage and adiabatic temperature rise of the concrete containing steel slag powder are also lower than those of concrete without steel slag powder [18,19]. 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].…”

Section: Introductionmentioning

confidence: 97%

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: Introductionmentioning

confidence: 97%

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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“…It is believed that stainless steel slag poses its activity at early ages, while its activity decreases gradually at later ages [22]. An opposite trend was observed for carbon steel slag, where its promoting e ect on cement appears at late ages [12,23]. It can be concluded that blended cement containing CS has higher strength gain rate than that containing SS, especially at later ages.…”

Section: Strengthmentioning

confidence: 97%

Comparison of Hydration Properties of Cement‐Carbon Steel Slag and Cement‐Stainless Steel Slag Blended Binder

Fathy

Guo

et al. 2018

Advances in Materials Science and Engineering

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This article investigates the effect of carbon steel slag (CS) and stainless steel slag (SS) on the hydration of cement (OPC). Two slags were used to replace cement at a replacement ratio of 15% (CS15 and SS15) and 30% (CS30 and SS30), respectively, by binder weight. Test results demonstrated that the hydration rate of OPC-CS binder is similar to that of OPC-SS binder at 3 days but higher than the latter at later ages. The negative effect of steel slag (CS) on the strength of cement mortar can be neglected when its replacement ratio does not exceed 15%. X-ray diffraction (XRD) and thermogravimetry (TG) show that the incorporation of SS tends to decrease calcium hydroxide (CH) content more than the incorporation of CS in the cement matrix. BSE (backscattered electron)/EDX (energy-dispersive X-ray spectroscopy) analyses estimate the average Si/Ca ratio of CS30 and SS30 at 90 days to be 0.41(Ca/Si = 2.44) and 0.45(Ca/Si = 2.22), respectively, compared to 0.43 (Ca/Si = 2.33) for pure cement.

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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%

“…Many studies are limited to various properties of cementitious materials that incorporate SS, while limited research is focused on investigating the influence of SS with variable particle size distribution from the same SS source on the properties of the cement or concrete. Wang et al [20] investigated the effects of a fine steel slag (FSS) (< 20 μm) and a coarse steel slag (CSS) (> 20 μm) on the properties of the cement and concrete. The authors found that an FSS within a 20 % replacement level showed negligible influences on the compressive strength, drying shrinkage and permeability of concrete at 28 days.…”

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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Influence of classified steel slag with particle sizes smaller than 20 μm on the properties of cement and concrete

Cited by 111 publications

References 28 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

Comparison of Hydration Properties of Cement‐Carbon Steel Slag and Cement‐Stainless Steel Slag Blended Binder

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

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