scholarly journals Potential of Stainless Steel Slag Waste in Manufacturing Self-Compacting Concrete

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2049
Author(s):  
Julia Rosales ◽  
Francisco Agrela ◽  
José Antonio Entrenas ◽  
Manuel Cabrera
Keyword(s):  
Stainless Steel ◽  
Construction Material ◽  
Steel Slag ◽  
Chemical Properties ◽  
Self Compacting Concrete ◽  
Stainless Steel Slag ◽  
Limestone Filler ◽  
Physical And Chemical ◽  
Slag Waste ◽  
And Chemical Properties

The volume of slags generated from the steel industry is a source of possible resources which is constantly increasing. Specifically, in the production of stainless steel, specific and singular slags with unique characteristics are obtained, which allows considering an approach aimed at their use in new recycling ways. This work shows the feasibility of using stainless steel slag as a substitute for limestone filler in the manufacture of self-compacting concrete. The influence of different treatments applied to slags on physical and chemical properties was studied. On the other hand, the mechanical behaviour, as well as the durability acquired in self-compacting concrete, has been analysed. Very encouraging results were obtained, since this research demonstrates the possible application of this stainless steel slag as a construction material, improving sustainability and promoting circular economy processes, which are achieved through the minimisation of the waste disposal and accumulation.

Characteristics and Treatment Technologies of Stainless Steel Slag

2011 ◽  
Vol 225-226 ◽  
pp. 812-815 ◽  
Author(s):  
Guo Jun Ma ◽  
Yi Fang ◽  
Hui Tang
Keyword(s):  
Stainless Steel ◽  
Steel Slag ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Stainless Steel Slag ◽  
Economic Profit ◽  
Treatment Processes ◽  
Treatment Technologies ◽  
Physical And Chemical ◽  
And Chemical Properties

The stainless steel slag contains chromium and iron as well as significant levels of heavy metals, such as Cr(VI). Therefore, to efficiently recovery the valuable components in the stainless steel slag has potential environment and economic profit. In this paper, the physical and chemical properties as well as the leaching properties of the stainless steel slag were summarized. In addition, the treatment processes which can recovery or utilize the valuables in the slag and other potential measures to reduce the environmental pollution of the stainless steel slag were also discussed.

ENHANCED ADHESION OF DIAMOND-LIKE CARBON COATINGS ON 316 STAINLESS STEEL

2000 ◽  
Vol 14 (07n08) ◽  
pp. 259-266 ◽  
Author(s):  
M. CHEN ◽  
J. GAO
Keyword(s):  
Stainless Steel ◽  
Chemical Properties ◽  
Diamond Like Carbon ◽  
Physical And Chemical Properties ◽  
Carbon Coatings ◽  
316 Stainless Steel ◽  
Dlc Coating ◽  
Intermediate Layers ◽  
Physical And Chemical ◽  
And Chemical Properties

Diamond-like carbon (DLC) has been a candidate prosthetic coating due to its excellent physical and chemical properties, and biocompatibility. However, the adhesion to a number of prosthetic materials is still an issue. Different techniques have been used to improve the adhesion of DLC on various substrates. In this paper, we report the fabrication of an adherent DLC coating on commercial 316 stainless steel by using pulsed laser deposition and a composition-graded intermediate layer. Intermediate layers with graded composition from stainless steel to DLC were obtained by designing an inlaid target. Raman spectrum analysis indicated that the grown DLC films are rich in sp3 bonds. The adhesion of the coatings as well as other properties of the intermediate layers are also discussed.

scholarly journals Physical and Chemical Properties of Waste Foundry Exhaust Sand for Use in Self-Compacting Concrete

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5629
Author(s):  
Maria Auxiliadora de Barros Martins ◽  
Lucas Ramon Roque da Silva ◽  
Maria Gabriela A. Ranieri ◽  
Regina Mambeli Barros ◽  
Valquíria Claret dos Santos ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Fine Sand ◽  
Economic Benefits ◽  
Hardened Concrete ◽  
Fine Aggregate ◽  
Physical And Chemical Properties ◽  
Self Compacting Concrete ◽  
X Ray ◽  
Physical And Chemical ◽  
And Chemical Properties

The reuse of waste in civil construction brings environmental and economic benefits. However, for these to be used in concrete, it is necessary a previous evaluation of their physical and chemical characteristics. Thus, this study aimed to characterize and analyze the waste foundry exhaust sand (WFES) for use in self-compacting concrete (SCC). Foundry exhaust sand originates from the manufacturing process of sand molds and during demolding of metal parts. It is a fine sand rich in silica in the form of quartz collected by baghouse filter. Characterization of WFES was conducted through laser granulometry, scanning electron microscopy (SEM) in the energy dispersive spectroscopy (EDS) mode, X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG) and derivative thermogravimetry (DTG) techniques. The waste was classified as non-hazardous and non-inert, with physical and chemical properties suitable for use in SCC composition, as fine aggregate or mineral addition. Five mixtures of SCC were developed, in order to determine the waste influence in both fresh and hardened concrete. The properties in the fresh state were reached. There was an increase in compressive strength and sulfate resistance, a decrease in water absorption of self-compacting concrete by incorporating WFES as 30% replacement.

scholarly journals Physical-Chemical Characteristics of South Aceh Marble and Its Suitability for Tiles Application

2020 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Lindawati Lindawati ◽  
Irwansyah Irwansyah ◽  
Nuzuli Fitriadi
Keyword(s):  
Water Absorption ◽  
Construction Material ◽  
Chemical Properties ◽  
Physicochemical Analysis ◽  
Building Stone ◽  
Test Results ◽  
Water Absorption Test ◽  
Natural Stones ◽  
Physical And Chemical ◽  
And Chemical Properties

Marble is a metamorphic rock that is widely distributed in the Earth�s continental layer. Regarding its antiquity and aesthetic appeal, it has been widely used as a construction material such as flooring tiles in buildings and monument. Physical and chemical properties of natural stones play an important role on deciding their application area as a building stone. This study reports the physicochemical analysis of marble stones from the Gunung Kerambil (GK), Alur Kering (AK) and Meukek (M) area in South Aceh District. Density, water absorption and chemical analyses of the marble samples were determined. Physical properties of samples were determined through laboratory measurements. Chemical characterizations were made using X-ray Fluorescence (XRF) method. Based on,water absorption test results, the marbles from South Aceh are applicable for tile application.

scholarly journals Performance of Self-compacting Concrete with Stainless Steel Slag Versus Fly Ash as Fillers: A Comparative Study

2021 ◽  
Author(s):  
Yeong-Nain Sheen ◽  
Duc-Hien Le ◽  
My Ngoc-Tra Lam
Keyword(s):  
Stainless Steel ◽  
Compressive Strength ◽  
Fly Ash ◽  
Setting Time ◽  
Steel Slag ◽  
Strength Loss ◽  
Comparative Investigation ◽  
Self Compacting Concrete ◽  
Stainless Steel Slag ◽  
Initial Setting Time

Recently, stainless steel slag -a byproduct of manufacturing stainless steel is accepted as a cementitious material, the chemical characteristics of which are highly variant. This study reuses two types of stainless steel reducing slag with specific surface area of 1766 cm2/g (S1) and 7970 cm2/g (S2) in developing self-compacting concrete (SCC). Particularly, two S2-blended SCCs incorporating with S1 and fly ash as fillers (calling as S-mix and F-mix) were prepared for a comparative investigation. In both SCCs, ordinary Portland cement was replaced by S2 with various ratios (from 0 % to 50 %, increment 10 %). Testing results show that in fresh state, the F-mix exhibits higher workability and longer initial setting time than those of S-mix. In hardened state, 10 % compressive strength loss was realized as increasing S2 content up to 30 % in the both SCCs; the strength of F-mix is up to 1.9 times of S-mix at the same rate of S2 replacement. Water absorption of the F-mix was below 3 %, suggested as a “good” quality concrete; whilst the S-mix could be longs to an “average” one. Resistivity and sulfate resistance of F-mix are considerably higher than those of S-mix. Moreover, based on the obtained data, compressive strength and electrical resistivity are correlated well with a logarithmic form.

scholarly journals Physical and Chemical Properties of the Slate Aggregate

2019 ◽  
Author(s):  
Petar Radanliev
Keyword(s):  
Case Studies ◽  
Construction Projects ◽  
Construction Material ◽  
Chemical Properties ◽  
Transportation Cost ◽  
Physical And Chemical Properties ◽  
Cost Of Transport ◽  
The Cost ◽  
Physical And Chemical ◽  
And Chemical Properties

The slate aggregate has long been perceived as a substandard, low quality waste material with its physical and chemical properties not being competitive with those of the primary aggregates. It is assumed that the slate aggregate particles are not strong, that is not durable and will not compact. This research aims to address those claims and review the available literature on the performance of the slate aggregate. The review inaugurates by analysing the physical, chemical and mechanical properties of slate, before expanding into a literature review of laboratory testing’s on the effect of moisture content on density, compaction and layer thickness of slate aggregate.The paper reviews case studies of construction projects in North Wales, where the slate aggregate has been used for general fill and road building for many years. Some of the case studies include the A55 coastal road and duelling of the A5 in Anglesey (WRAP, 2004), where slate aggregate was successfully used as sub-base. The paper also investigates why many civil engineers are reluctant to use the slate aggregate and regard the material as sub-standard, flaky aggregate. The research paper reviews the potential usages and various products the slate aggregate is suitable for and satisfies the requested standards. The final topic reviewed is the cost of transporting slate aggregate compared with the cost of transport for primary aggregate and the introduction of the Primary Aggregates Tax (Parliament of the United Kingdom, 2011). The last topic includes a critical analyses of the claims that the slate aggregate a commercially viable construction material despite its remote location (Woodward et al, 2004). The transportation cost and the supply chain complexities must be evaluated prior to considering the long-term sustainability of the product (Radanliev et al1-6, 2014, 2015, 2016).

scholarly journals Alkali-Activated Stainless Steel Slag as a Cementitious Material in the Manufacture of Self-Compacting Concrete

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3945
Author(s):  
Julia Rosales ◽  
Francisco Agrela ◽  
José Luis Díaz-López ◽  
Manuel Cabrera
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Fly Ash ◽  
Steel Slag ◽  
Cementitious Material ◽  
Self Compacting Concrete ◽  
Stainless Steel Slag ◽  
Alkali Activated ◽  
Activating Solution

This work develops the manufacture of self-compacting concrete (SCC) with 50% cement reduction. As an alternative binder to cement, the viability of using an alkali-activated combination of stainless steel slag (SSS) and fly ash (FA) has been demonstrated. SSS was processed applying three different treatments. Binders were manufactured mixing 35% SSS with 65% FA, as precursors, and a hydroxide activating solution. This binder was replaced by the 50% cement for the manufacture of SCC. The results obtained show good mechanical properties and durability. The study shows a reduction in the use of cement in the manufacture of SCC reusing two wastes.

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