Performance of steel slag aggregate in asphalt mixtures in a hot desert climate

Hassan, Khaled; Attia, Mohamed; Reid, Murray; Al-Kuwari, Mohammed

doi:10.1016/j.cscm.2021.e00534

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…The chemical constituent of the waste material was analysed using X-Ray Diffraction Analysis (XRD). The mineral constituent of steel slag is dominated by iron and magnesium oxides, which accounts for its hardness and increased density, which agrees with the research of Hassan et al (2021). In the case of crushed glass, silica is the most dominant.…”

Section: Index Propertiessupporting

confidence: 88%

“…Several waste materials are now used as substitutes for highway materials. The use of steel slag (Ahmedzade and W Sengoz 2009;Crisman et al, 2019;Hassan et al, 2021), waste glass has been studied by various authors. In countries such as Germany, slag applications particularly in pavement construction and concrete exceeds 75% of total slag produced (Huang et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Performance of Glass and Steel Slag Mixtures as a Partial Replacement for Fine Aggregate in Asphalt Concrete

Ogunsanya¹,

Aluko²,

Ogundipe³

2022

FUOYEJET

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Solid waste management is a significant challenge particularly in developing countries for example Nigeria. The waste disposal technique is inadequate as negative effects from improper solid waste dumping can be easily visible in the environment. Recycling and reuse of wasteas aggregate in asphalt production may be an economic way to reduce these problems. This research evaluates the viability of crushed waste glass combined with steel slag (GSS) as fine aggregate in asphalt wearing courses. The Marshall mix method was used in production and evaluation of samples. GSS mixtures in the ratio 70:30 (steel slag: glass) were substituted for fine aggregate at varying percentages of 0 to 50 %. This mix ratio was adopted so that the glass content does not exceed 10%.Five samples of GSS content (10%, 20%, 30%, 40%and 50%) were prepared and their Marsha lstability,Voids in Mineral Aggregates, Voids filled with Bitumen and bulk density were evaluated and compared to nominal asphalt mix. While a 10% GSS replacement in modified asphalt resulted in a greater peak stability value of 16.21 kN compared to the standard mix peak stability value of 12.68kN. The 20% GSS replacement resulted in a lower flow value and a significantly higher Marshall quotient of 5.11KN/MM was recorded at 20% replacement, making it preferable. As a result, a 20% replacement is advised for heavily trafficked highways, whereas up to 30% replacement is permissible on lightly traveled roads.

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Section: Index Propertiessupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Performance of Glass and Steel Slag Mixtures as a Partial Replacement for Fine Aggregate in Asphalt Concrete

Ogunsanya¹,

Aluko²,

Ogundipe³

2022

FUOYEJET

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“…The expansion rates of BG and PG are relatively close, and both are around 1%. The volume expansion of steel slag varies from 0.5 to 3.5% in the present research; it can be found that the expansion rates of XG, PG, and BG are at a low level, while the volume expansion rate of WG is relatively high [53,54].…”

Section: Volume Expansionmentioning

confidence: 53%

Research on the Properties of Steel Slag with Different Preparation Processes

Liu,

Zhang,

et al. 2024

Materials

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To promote the resource utilization of steel slag and improve the production process of steel slag in steelmaking plants, this research studied the characteristics of three different processed steel slags from four steelmaking plants. The physical and mechanical characteristics and volume stability of steel slags were analyzed through density, water absorption, and expansion tests. The main mineral phases, morphological characteristics, and thermal stability of the original steel slag and the steel slag after the expansion test are analyzed with X-ray diffractometer (XRD), scanning electron microscope (SEM), and thermogravimetric analysis (TG) tests. The results show that the composition of steel slag produced by different processes is similar. The main active substances of other processed steel slags are dicalcium silicate (C2S), tricalcium silicate (C3S), CaO, and MgO. After the expansion test, the main chemical products of steel slag are CaCO3, MgCO3, and calcium silicate hydrate (C-S-H). Noticeable mineral crystals appeared on the surface of the steel slag after the expansion test, presenting tetrahedral or cigar-like protrusions. The drum slag had the highest density and water stability. The drum slag had the lowest porosity and the densest microstructure surface, compared with steel slags that other methods produce. The thermal stability of steel slag treated by the hot splashing method was relatively higher than that of steel slag treated by the other two methods.

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“…Test results compared with QCS requirements are shown in Table 6. After monitoring the trial sections and testing of the extracted samples, the study concluded that steel slag can be used as coarse aggregate (5-20 mm) to replace gabbro in asphalt base mixes; however, the Ministry of Environment has limited the use to a maximum of 20% in asphalt base courses and in non-structural ancillary concrete such as soakaways, manholes and cable covers (Hassan et al, 2017). Paving operations of asphalt mix with 20% steel slag are shown in Figure 4.…”

Section: Steel Slagmentioning

confidence: 99%

Utilization of Recycled Materials in Infrastructure Projects: Ashghal Approach

Elhussein,

Al-Mansoori

2023

The International Conference on Civil Infrastructure and Construction

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As a result of numerous infrastructure projects which have taken place in Qatar in the last decade, there has been an unprecedented increase in demand for construction materials. In addition, the huge program of infrastructure development has led to production of massive quantities of construction waste. Consequently, the Public Works Authority of Qatar (Ashghal) launched an initiative to use recycled materials in projects in line with Qatar National Vision 2030 and Qatar National Development Strategy 2018 - 2022. A roadmap was developed in 2018 considering the available resources and experiences. Recyclable materials which can be used in Ashghal projects were identified. Excavation waste, demolition waste, Reclaimed Asphalt Pavement (RAP), Wadi Aggregate, Crumb Rubber and Steel Slag were selected for reuse. Controlled logistic areas to store, manage and process recyclable materials were established. Moreover, guidelines and prequalification procedures were developed for both materials sources and recycled materials producers. Testing programs were carried out on these materials to identify their basic characteristics. Laboratory trials and field trials were carried out at selected projects. Field trials were monitored and assessed using the local construction specifications QCS 2014. Based on lab and field trials, customized specifications were developed for the utilization of the selected recyclable materials in Ashghal projects. These specifications establish the baseline for construction using the selected recycled materials and determine the criteria and methods needed for quality control. Furthermore, Key Performance Indicators (KPIs), were established for Ashghal project departments to monitor their performance in relation to recycling. Ashghal's phenomenal performance in utilization of recycled materials in the last three years is presented.

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Performance of steel slag aggregate in asphalt mixtures in a hot desert climate

Cited by 9 publications

References 9 publications

Performance of Glass and Steel Slag Mixtures as a Partial Replacement for Fine Aggregate in Asphalt Concrete

Performance of Glass and Steel Slag Mixtures as a Partial Replacement for Fine Aggregate in Asphalt Concrete

Research on the Properties of Steel Slag with Different Preparation Processes

Utilization of Recycled Materials in Infrastructure Projects: Ashghal Approach

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