Investigation on the application of steel slag–fly ash–phosphogypsum solidified material as road base material

Shen, Weiguo; Zhou, Mingkai; Ma, Wei; Jin-qiang, HU; Cai, Zhi

doi:10.1016/j.jhazmat.2008.07.125

Cited by 225 publications

(79 citation statements)

References 15 publications

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“…Više znanstvenika je razvoj rane čvrstoće u smjesama s fosfogipsom pripisalo pojavi etringita [26,[63][64][65]. Zbog prisutnosti fosfogipsa, ubrzane su pucolanske reakcije [26,63,64].…”

Section: Mehanizam Stabilizacije Tla Vapnom Uz Dodatak Fosfogipsaunclassified

Utjecaj fosfogipsa na čvrstoću ekspanzivnog tla stabiliziranog vapnom

2014

JCE

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“…Više znanstvenika je razvoj rane čvrstoće u smjesama s fosfogipsom pripisalo pojavi etringita [26,[63][64][65]. Zbog prisutnosti fosfogipsa, ubrzane su pucolanske reakcije [26,63,64].…”

Section: Mehanizam Stabilizacije Tla Vapnom Uz Dodatak Fosfogipsaunclassified

Utjecaj fosfogipsa na čvrstoću ekspanzivnog tla stabiliziranog vapnom

2014

JCE

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“…Experience in many countries including the United States, Belgium, Japan, The Netherlands, Germany, and Saudi Arabia [4,5,[11][12][13] has referred that steel slag aggregates, when properly selected, processed, aged, and tested, can be used as granular base for roads in above-grade applications. Positive properties of steel slag include very high stability and good soundness.…”

Section: Granular Bases and Sub-basesmentioning

confidence: 99%

Recycling of Local Qatar?s Steel Slag and Gravel Deposits in Road Construction

Taha¹,

Şirin²,

Sadek³

2014

Int J Waste Resources

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Every year, the State of Qatar generates about 400,000 tons of steel slag and another 500,000 tons of gravel as a result of steel manufacturing and washing sand, respectively. The two materials (by-products) are not fully utilized to their best market values. At the same time, infrastructural renewal will take place in Qatar over the next ten years, and there will be a greater demand for aggregates and other construction materials as the country suffers from the availability of good aggregates. This paper presents results obtained on the use of steel slag, gravel and gabbro (control) in hot mix asphalt concrete (HMAC) paving mixtures and road bases and sub-bases. Tests were conducted in accordance with Qatar Construction Specifications (QCS-2010) and results were compared with QCS requirements for aggregates used in these applications. Based on the data obtained in this work, steel slag and gravel aggregates have a promising potential to be used in hot mix asphalt concrete paving mixtures on Qatar's roads, whether in asphalt base and asphalt wearing courses or as unbound aggregates in the base and sub-base pavement structure.

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“…It is caused by the possibility of application of certain amount of heavy metals (HM) along with phosphogypsum into ecosystems amplifying their migration in the soil environment by means of soil solution souring with phosphogypsum, getting into trophic chains, and increasing of anthropogenic pressure on ecosystems [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Modelling of the vertical migration process of phosphogypsum components in the soil profile

Chernysh¹,

Plyatsuk²,

Yakhnenko³

et al. 2017

JES

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Abstract. This paper focuses on the study of the process of vertical migration of phosphogypsum components according to the soil profile. The qualitative and quantitative identification of main biogenic elements (phosphorus, sulphur, calcium etc) and heavy metals in lysimetric solutions from various horizons while getting on the surface of soil solutions containing phosphogypsum components is carried out by means of designed laboratory and experimental complex. The mineral hard soil fraction is also analysed. According to the results of the X-ray diffractometrical researches, the carbonates with heavy metals in their structure, caused by the ion-exchange with Са2+, were found in the mineral structure of the illuvial horizon soil samples. The results of experimental modeling indicate significant changes in the chemical parameters of groundwater, which are obtained by passing water with phosphogypsum particles on a model soil profile, which makes it easy to track the input data. In the upper part of the profile after 1 000 hours and for the first speed of the infiltration process, the constant moisture level was 25,6%, after the second speed of infiltration, it rose to 29.1 %. Noted that the highest concentration of biogenic elements (calcium, sulfur, potassium) was found in lysimetric solutions obtained from the humus and eluvial horizons. In addition, it is determined that iron is present up to 5 %, nickel -within the range of 1-3 %, and copper -up to 1 %. It should be noted that the biochemical transformations of silicon influence the fractional distribution of heavy metals, which can be fixed by sorption-sedimentation mechanisms in silica, oligo and polysilicon compounds, as well as in crystalline lattice structures of clay minerals, quartz, etc. The model of soil and geochemical situation was formed according to the soil profile under the influence of the phosphogypsum within the three-dimensional surface, developed with the help of the stochastic reconstructions based on the images of the scan electron microscopes.

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Investigation on the application of steel slag–fly ash–phosphogypsum solidified material as road base material

Cited by 225 publications

References 15 publications

Utjecaj fosfogipsa na čvrstoću ekspanzivnog tla stabiliziranog vapnom

Utjecaj fosfogipsa na čvrstoću ekspanzivnog tla stabiliziranog vapnom

Recycling of Local Qatar?s Steel Slag and Gravel Deposits in Road Construction

Modelling of the vertical migration process of phosphogypsum components in the soil profile

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