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

2014 ◽  
Vol 04 (04) ◽  
Author(s):  
Ramzi Taha Okan Sirin ◽  
Husam Sadek
Keyword(s):  
Steel Slag ◽  
Road Construction

Skidding Characteristics of Pavement Surfaces Incorporating Steel Slag Aggregates

1996 ◽  
Vol 1545 (1) ◽  
pp. 35-40 ◽  
Author(s):  
A. F. Stock ◽  
Colin M. Ibberson ◽  
I. F. Taylor
Keyword(s):  
Steel Industry ◽  
Steel Slag ◽  
Road Construction ◽  
Specimen Preparation ◽  
Skid Resistance ◽  
Performance Measurements ◽  
Performance Expectations ◽  
The Past ◽  
Set Up

Steel slag, a by-product of the steel industry, has been used in road construction in South Yorkshire and its environs for the past 60 years. Local highway engineers have anecdotal evidence of good long-term antiskid performance from road surfacings that incorporate steel slag aggregate, and these materials have remained popular with users. In view of the move toward performance measurements for paving materials, a systematic study of the performance of paving materials incorporating slag has been set up as a combined industry-university project with the assistance of the Teaching Company Directorate. The evaluation of the skid resistance characteristics of steel slag aggregates and the skidding characteristics of pavement surfaces incorporating steel slag aggregate are reported. The research program developed a modified specimen preparation procedure that significantly reduced the scatter in polished stone value (PSV) results. The field data showed that all steel slag surfaces provided good long-term skid resistance and that the 14-mm chippings exceed the performance expectations of rock chippings with similar PSVs.

Environmental impacts of steel slag reused in road construction: A crystallographic and molecular (XANES) approach

2007 ◽  
Vol 139 (3) ◽  
pp. 537-542 ◽  
Author(s):  
Perrine Chaurand ◽  
Jerome Rose ◽  
Valérie Briois ◽  
Luca Olivi ◽  
Jean-Louis Hazemann ◽  
...  
Keyword(s):  
Environmental Impacts ◽  
Steel Slag ◽  
Road Construction

scholarly journals Steel Slag as an Aggregate Replacement in Malaysian Hot Mix Asphalt

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Mohd Rosli Hainin ◽  
Nur Izzi Md. Yusoff ◽  
Mohd Fahmi Mohammad Sabri ◽  
Mohd Azizi Abdul Aziz ◽  
Mohd Anwar Sahul Hameed ◽  
...  
Keyword(s):  
Steel Industry ◽  
Resilient Modulus ◽  
Steel Slag ◽  
Road Construction ◽  
Design System ◽  
High Demand ◽  
Asphalt Mixes ◽  
Alternative Materials ◽  
Crushed Aggregate ◽  
Pavement Construction

As natural aggregate sources are becoming depleted due to high demand in road construction and the amount of disposed waste material keeps increasing, researchers are exploring the use of alternative materials which could preserve natural sources and save the environment. In this study, steel slag was used as an aggregate replacement in conventional dense graded asphalt mixes (ACW14 and ACB28). Steel slag was selected due to its characteristics, which are almost similar to conventional aggregates, and the fact that it is easily obtainable as a by-product of the steel industry. The same gradations of mixtures were produced using normal crushed aggregate as control samples. The Marshall mix design system was used for sample preparation in accordance with Malaysian specifications. Samples of asphaltic concrete were subjected to the resilient modulus test, creep test and rutting test. Samples made from steel slag show significantly better results than conventional aggregate. Therefore, utilization of steel slag will reduce land fill, save natural resources and improve the strength of pavement to sustain a higher volume of vehicles. This will shift the gear in sustainable pavement construction, which is most desirable in today’s energy deficient world.

Steel slag quality control for road construction aggregates and its environmental impact: Case study of Vietnamese steel industry – Leaching of heavy metals from steel making slag

2021 ◽  
Author(s):  
Lan Huong Nguyen ◽  
Tien Dung Nguyen ◽  
Thi Viet Nga Tran ◽  
Duc Luong Nguyen ◽  
Hoai Son Tran ◽  
...  
Keyword(s):  
Quality Control ◽  
Steel Slag ◽  
Road Construction ◽  
Basic Oxygen Furnace ◽  
Test Methods ◽  
Leaching Test ◽  
Operation Condition ◽  
Steel Making ◽  
Slag Treatment ◽  
Current Utilization

Abstract Steel slag is an industrial by product of steel manufacturing processes and has been widely used in countries like Japan, United States, and European Union nations. However, the current utilization of steel slag in Vietnam is very low mainly because of lack of quality control of slag treatment and chances for reuse of treated steel slag. This paper presents the current steel slag production status and its potential to use as road construction aggregates in consideration of environmental and quality control issues. The basic oxygen furnace (BOF) and electric arc furnace (EAF) slag samples were collected from the seven large steel making factories of Vietnam and brought back to evaluate leaching amount from the slags. The batch leaching test methods were performed at laboratory using the leaching test of steel slag roadbed material in Japan (JIS K 0058 − 1) and Toxicity Characteristic Leaching Procedure (EPA method 1311) widely adopted in Vietnam. The results show that pH level and parameters such as T-Cr, Ni, Cu, Pb, As, Mn differ from the two test methods. The EPA 1311 seems too harsh to evaluate the environmental impacts because in the operation condition of the road, acidic liquid is absent. It is concluded that JIS test, which uses fresh water with gentle mixing not to degradation in size while leaching, is suitable for the evaluation, for the environmental assessment in service of the slag aggregate for roadbed.

scholarly journals Comprehensive Analysis of Steel Slag as Aggregate for Road Construction: Experimental Testing and Environmental Impact Assessment

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3587
Author(s):  
Marina Díaz-Piloneta ◽  
Marta Terrados-Cristos ◽  
Jose Valeriano Álvarez-Cabal ◽  
Eliseo Vergara-González
Keyword(s):  
Coarse Aggregate ◽  
Raw Materials ◽  
Experimental Testing ◽  
Steel Slag ◽  
Reduction Rate ◽  
Road Construction ◽  
Comprehensive Analysis ◽  
Point Of View ◽  
Technical Performance ◽  
Bof Slag

Blast Oxygen Furnace (BOF) slag represents one of the largest waste fractions from steelmaking. Therefore, slag valorisation technologies are of high importance regarding the use of slag as a secondary resource, both in the steel sector and in other sectors, such as the construction or cement industries. The main issue regarding the use of BOF slag is its volumetric instability in the presence of water; this hampers its use in sectors and requires a stabilisation pre-treatment. These treatments are also cost-inefficient and cause other environmental issues. This paper analyses the use of untreated BOF slag from a technical and environmental point of view, suggesting it as an alternative to natural aggregates in road surface layers and asphalt pavements. A comprehensive analysis of the requirements to be met by raw materials used in asphalt mixes was performed, and a pilot test was carried out with two different mixtures: one mix with limestone as coarse aggregate and another with 15% BOF slag. Furthermore, the global warming impacts derived from each mix with different aggregates were measured by Life Cycle Analysis (LCA), and a transport sensitivity analysis was also performed. The results show how the utilization of BOF slag as coarse aggregate in road construction improves the technical performance of asphalt mixtures (Marshall Quotient 4.9 vs. 6.6). Moreover, the introduction of BOF slag into the asphalt mix as a coarse aggregate, instead of limestone, causes a carbon emissions reduction rate of more than 14%.

scholarly journals THE EFFECT OF LONG-TERM STORAGE OF ELECTRIC STEEL SMELTING SLAGS IN DUMPS ON THEIR PROPERTIES

2020 ◽  
pp. 32-39
Author(s):  
Aleksey Pogromskiy ◽  
Tat'yana Anikanova
Keyword(s):  
Raw Materials ◽  
Steel Slag ◽  
Physical And Mechanical Properties ◽  
Road Construction ◽  
Mineral Resources ◽  
Mineralogical Composition ◽  
Electric Steel ◽  
Steel Smelting ◽  
Current Output ◽  
Main Component

construction, repair and reconstruction of roads require high costs of mineral raw materials in the form of sand, gravel, mineral powder. However, its reserves on the territory of our country are distributed unevenly, which causes significant transportation costs for the delivery of mineral resources to construction sites. In addition, mineral resources are inevitably reduced over time, which requires extensive involvement in the construction of roads of non-traditional types of raw materials, as well as industrial waste. The paper presents the results of studies of the properties of electric steel slag, the current output and stored in the dumps for several years. The main component of electric steel-smelting slags, both fresh and dumped, lying in dumps for about 20 years, is shannonite or γ-modification of calcium orthosilicate C2S. It has been established that the mineralogical composition of the Oskol Electrometallurgical Combine's slag is represented by hematite, wuistite, calcite, periclase, and also portlandite, formed during quenching of lime. Analysis of diffractograms of slags of different shelf life shows that in the initial periods of slag storage in the dumps there is a final quenching of lime and its carbonization with the formation of calcite. The results of the determination of the granulometric composition of the slag of different storage periods showed a decrease with time of the number of fine fractions and an increase in large fractions. It is established that when using electric steel-smelting slags in the construction and repair of highways, it is necessary to take into account changes in the physical and mechanical properties of materials. The processes that take place during the maintenance of slags in dumps determine the suitability of the use of slag mineral materials in road construction.

scholarly journals REPLACEMENT OF NATURAL AGGREGATES USED IN ROAD STRUCTURES WITH STEEL SLAG

2021 ◽  
Vol XXVIII (2) ◽  
pp. 120-124
Author(s):  
Ion Chiricuta ◽  
Keyword(s):  
Natural Environment ◽  
Industrial Waste ◽  
Steel Slag ◽  
Road Construction ◽  
Base Layer ◽  
Flow Index ◽  
Natural Aggregates ◽  
The Cost ◽  
Marshall Stability ◽  
Modern Technologies

This work facilitates the application of modern technologies for road construction, by using steel slag instead of natural stone aggregates. This procedure will result in a significant decrease in the cost of works (slag, being an industrial waste, is much cheaper than natural aggregate). In the same time, the use of slag aggregates can result in protection of the environment, by eliminating slag storage spaces and by preserving the natural environment (extraction of natural aggregates may disturb groundwater and intensify erosion etc). Marshall stability, flow index and bulk density were determined for both kinds of aggregates, in order to find if the steel slag can safely replace the natural aggregates. By comparing the experimental results obtained for the two kinds of aggregates, it was confirmed the possibility of successfully using of steel slag as a substitute for natural aggregates in the base layer of a road structure.

scholarly journals Mechanical properties of steel slag replaced mineral aggregate for road base/sub-base application based Vietnam and Japan standard

2021 ◽  
Author(s):  
Dang Tung Dang ◽  
Manh Tuan Nguyen ◽  
Tan Phong Nguyen ◽  
Tomoo Isawa ◽  
Yasutaka Ta ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Steel Slag ◽  
Road Construction ◽  
Test Method ◽  
Base Layer ◽  
Steelmaking Slag ◽  
Mineral Aggregate ◽  
Iron And Steel ◽  
Volume Stability ◽  
Road Pavement

AbstractSteelmaking slag is one of the most massive industrial by-products generated during steelmaking processes. This paper presents the current steelmaking slag production status and its potential to use as mineral aggregates in base/sub-base layer of road pavement. The mechanical properties of steelmaking slag were confirmed by the test method specified in Vietnam specification. The volume stability test of the slag was conducted based on JIS A 5015-2018 (Japanese Industrial Standard: Iron and steel slag for road construction). From the results, it was confirmed that steelmaking slag can satisfy all the mechanical requirements specified in Vietnam specification and the requirements regarding stability specified in JIS A 5015-2018. In addition, it was found that the elastic modulus of steelmaking slag applied as a base or sub-base layer in pavement was higher than that of the conventional graded aggregate made from mineral aggregate. Therefore, the thickness of pavement can be reduced by using steelmaking slag, and the construction cost can be lower.

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