Laboratory investigation and modeling of concrete pavements containing AOD steel slag

Gupta, Tanvi; Sachdeva, S. N.

doi:10.1016/j.cemconres.2019.105808

Cited by 26 publications

(6 citation statements)

References 33 publications

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“… The 28 d relative compressive strength of hardened paste with SS as an SCM [ 12 , 54 , 80 , 82 , 102 , 103 , 107 ]. The relative compressive strength is the ratio of the compressive strength of composite paste containing metallurgical slag to that of the plain cement paste.…”

Section: Microstructure Mechanical Properties and Durabilitymentioning

confidence: 99%

Adverse Effects of Using Metallurgical Slags as Supplementary Cementitious Materials and Aggregate: A Review

2022

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This paper discusses a sustainable way to prepare construction materials from metallurgical slags. Steel slag, copper slag, lead-zinc slag, and electric furnace ferronickel slag are the most common metallurgical slags that could be used as supplementary cementitious materials (SCMs) and aggregates. However, they have some adverse effects that could significantly limit their applications when used in cement-based materials. The setting time is significantly delayed when steel slag is utilized as an SCM. With the addition of 30% steel slag, the initial setting time and final setting time are delayed by approximately 60% and 40%, respectively. Because the specific gravity of metallurgical slags is 10–40% higher than that of natural aggregates, metallurgical slags tend to promote segregation when utilized as aggregates. Furthermore, some metallurgical slags deteriorate the microstructure of hardened pastes, resulting in higher porosity, lower mechanical properties, and decreased durability. In terms of safety, there are issues with the soundness of steel slag, the alkali-silica reaction involving cement and electric furnace ferronickel slag, and the environmental safety concerns, due to the leaching of heavy metals from copper slag and lead-zinc slag.

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Section: Microstructure Mechanical Properties and Durabilitymentioning

confidence: 99%

Adverse Effects of Using Metallurgical Slags as Supplementary Cementitious Materials and Aggregate: A Review

2022

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“…Here, the humidity characteristics of concrete is described by the relative humidity of concrete. The relation between volumetric moisture content (W v ) and humidity flux (F w ) can be given as follows [16,17]:…”

Section: Moisture Diffusion Modelmentioning

confidence: 99%

“…Apart from the influence of relative humidity and temperature on the humidity diffusion coefficient [16], the evolution of the microstructure at the early age will also affect the humidity diffusion. The effects of age and porosity were both taken into account for humidity diffusion coefficient [20].…”

Section: Modification Of Diffusion Coefficient Considering Coupled Ef...mentioning

confidence: 99%

Coupled Effects of Heat and Moisture of Early-Age Concrete

Wang¹,

Wang²,

Yang³

et al. 2021

Fluid Dynamics &Amp; Materials Processing

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In order to analyze the coupled influence of temperature and humidity on early-age concrete (including cement and copper tailings), a mathematical model is introduced on the basis of the Krstulovic-Dabic hydration reaction kinetic equations. In such a framework, the influence of hydration-released heat and water consumption are also taken into account. The results provided by such a model are verified by means of experiments and related sensor measurements. The research results show that this model can adequately predict the internal temperature and the humidity temporal evolution laws. KEYWORDSComposite cementitious materials; cement hydration; micro-structure; diffusion coefficient; coupled of heat and moisture Nomenclature A: empirical coefficient, m/h a: constant related to temperature B: empirical coefficient, m/h b: constant related to humidity C: specific heat capacity of concrete, J/(kg•°C) D: hydration degree, % D c : hydration degree of cement, % D 28 : hydration degree when cement is hydrated for 28 days, % E: activation energy of hydration, J/mol E s : diffusion activation energy, J/mol F w : humidity flux H: hydration relative humidity, % H s : relative humidity induced by self-drying of concrete, % H s-max : maximum relative humidity induced by self-drying of concrete, % H E : relative humidity of surrounding environment, % h: constant related to porosity K NG : rate constant of NG process K I : rate constant of I process K D : rate constant of D process This work is licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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“…Structures in the form of plates on an elastic foundation have found wide application as designs of rigid pavements. Rigid pavement [1][2][3][4][5][6] differ from flexible pavement [7][8][9][10] in existence of a concrete layer in a surface course. Such constructions perceive big loading.…”

Section: Introductionmentioning

confidence: 96%

Ways to Minimize Volume (Weight) and Increase the Bearing Capacity of Rigid Pavement

Kolesnikov¹,

Tolmacheva²

2019

Civ Eng J

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The objective of research is finding of a possibility economy of rigid pavement weight and volume of material. The subject of the research is a mathematical model of rigid pavement in the form of a multilayer structure on an elastic foundation. The method of a research consists in modeling the behavior of rigid pavement in the form of a set of equations. These equations reflect the change in the stress-strain state of such structures. The system of equations takes into account the geometric nonlinearity of the work of materials and makes it possible to investigate the influence of various parameters on the values of stresses and displacements. Critical force coefficient and stress of shells are calculated by Bubnov-Galerkin. The formation way of the elastic foundation allows modeling the spreading layers with various characteristics. Use of two-layer model allows considering of a surface course and base course of road pavement designing (for example concrete and crushed stone). The graphs show the patterns of change of the stress of rigid pavement when changing the characteristics. The form of rigid pavement allowing to maintain big loadings is exposed to improvement. Findings shows the possibility of optimizing the geometric parameters of the design and achieving the savings in weight and volume of the consumable material.

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Laboratory investigation and modeling of concrete pavements containing AOD steel slag

Cited by 26 publications

References 33 publications

Adverse Effects of Using Metallurgical Slags as Supplementary Cementitious Materials and Aggregate: A Review

Adverse Effects of Using Metallurgical Slags as Supplementary Cementitious Materials and Aggregate: A Review

Coupled Effects of Heat and Moisture of Early-Age Concrete

Ways to Minimize Volume (Weight) and Increase the Bearing Capacity of Rigid Pavement

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