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 Utilization of Industrial Waste Products in the Production of Asphalt Concrete for Road Construction

2019 ◽  
Vol 27 (4) ◽  
pp. 11-17
Author(s):  
Oyedepo J. Olugbenga
Keyword(s):  
Asphalt Concrete ◽  
Industrial Waste ◽  
Road Construction ◽  
Ceramic Tiles ◽  
Waste Products ◽  
Heavy Medium ◽  
Physical Tests ◽  
Pavement Construction ◽  
The Cost ◽  
Marshall Stability

Abstract The utilization of industrial waste products to produce asphalt concrete for road construction was investigated. Aggregates were partially replaced with aluminum slag (AS) and crushed ceramic tiles (CCT) at 10%, 20%, 30%, 40%, and 50% by weight. Physical tests were performed on the aggregates, while a flash and fire point test as well as penetration tests were carried out on the bitumen. Similarly, Marshall stability tests were conducted on cylindrical specimens of the asphalt concrete. The average values of 18.88 and 30.69 obtained for the aggregate impact value (AIV) and aggregate crushing value (ACV) were satisfactory for road surfacing when compared with the specification. Marshall stability values of 10.84 KN, 4.27 KN, and 3.21 KN respectively were obtained with 30%, 20%, and 50% partial replacements with AS. The percentages were suitable for heavy, medium and light traffic when compared with the Marshall design criteria provided by the Asphalt Institute. The use of aluminum slag and crushed ceramic tile could reduce the large volume of industrial waste and the cost of pavement construction and maintenance.

scholarly journals Using the Industrial Wastes in the Base Layer of Pavement

2019 ◽  
Vol 8 (2) ◽  
pp. 1-15
Author(s):  
Lixandru Cătălina Georgiana ◽  
Dicu Mihai ◽  
Andrei Bogdan
Keyword(s):  
Industrial Waste ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Industrial Wastes ◽  
Base Layer ◽  
Dynamic Tests ◽  
Static And Dynamic Tests ◽  
Natural Aggregates ◽  
Materials Used ◽  
Furnace Slag

Abstract This paper evaluates the possibility of using artificial aggregates from blast furnace slag, considered industrial waste, which can replace, in a certain dosage, the natural aggregates in the composition of an AB 22,4 asphalt mixture. Furthermore, it is presented the possibility to replace the usual filler with powders from industrial wastes such as the desulphurization waste, generated by the combustion of the energetic coal. Laboratory studies and researches are carried out according to prescribed techniques. For this purpose, for the evaluation of the performance of the asphalt mixture recipes will be evaluated by static and dynamic tests as described in AND 605: 2016. The results of this study show the possibility of using asphalt mixtures with different dosages of industrial wastes in composition. The results obtained from the laboratory tests have shown that materials from industrial waste can be used in the design of asphalt mixtures with the purpose of replacing natural materials, used in certain dosages, which demonstrates good behavior in interaction with the usual bituminous binder.

scholarly journals Compaction Procedures and Associated Environmental Impacts Analysis for Application of Steel Slag in Road Base Layer

2021 ◽  
Vol 13 (8) ◽  
pp. 4396
Author(s):  
Bo Gao ◽  
Chao Yang ◽  
Yingxue Zou ◽  
Fusong Wang ◽  
Xiaojun Zhou ◽  
...  
Keyword(s):  
Environmental Impacts ◽  
Steel Slag ◽  
Base Layer ◽  
Land Occupation ◽  
Additional Energy ◽  
Vibration Period ◽  
The Road ◽  
Road Base ◽  
Natural Aggregates ◽  
Pavement Construction

In recent years, recycling steel slag is receiving growing interest in the road base layer construction field due to its role in alleviating land occupation and resource shortages. However, the mixture compaction and its environmental impact on practical construction sites remain unclear, which may hinder the application of steel slags in road layers. This study investigates the pavement construction of the ‘Baotou-Maoming’ motorway, located in Inner Mongolia, China, analyzing the compaction procedures and assessing the environmental impacts caused by the road base layer containing steel slag. Firstly, mechanical properties and texture appearances of the steel slag aggregates are characterized. Afterwards, the comparative assessments for steel slag and andesite layers compaction are quantified from equivalent CO2 emission and energy consumption aspects, respectively. The results show that the steel slag has a better surface texture than the natural aggregates; physical properties including compactness, flatness and compressive strength comply with the requirements for applying steel slag to a hydraulically bound mixture. Compared to the base layer using andesite aggregates, the compaction vibration period of the course containing steel slags should be reduced to achieve a proper density due to the “hard-to-hard” effect that occurs between the adjacent steel slag particles. Consequently, the additional energy and the equivalent CO2 are generated at 2.67 MJ/m3 and 0.20 kg/m3, respectively.

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.

Characteristics and Utilization of Steel Slag in Road Construction

2014 ◽  
Vol 70 (7) ◽  
Author(s):  
Ebenezer Akin Oluwasola ◽  
Mohd Rosli Hainin ◽  
Md. Maniruzzaman A. Aziz
Keyword(s):  
Construction Material ◽  
Steel Slag ◽  
Highway Construction ◽  
Chemical Properties ◽  
Road Construction ◽  
Assessment And Evaluation ◽  
Metallurgical Slags ◽  
Natural Aggregates ◽  
Test Requirements ◽  
Physical And Chemical

Presently, the rate of utilization of steel slag in Malaysia is rather too low compared to some advanced countries. Many studies focused on the better way to increase the usage of industrial by-products in order to ease disposal problems. Enormous quantities of steel slag were deposited in yards, causing environmental pollution. Like other metallurgical slags, steel slags exhibit a great potential to be used as aggregate in highway construction. The assessment and evaluation of this material should be based on environmental, economic and technical factors before it can be used in road construction. In terms of technical perspective, steel slags must met the required test requirements that are needed for natural aggregates used for similar purposes. The degree of slag utilization needs to be improved as an important measure to these problems. The physical and chemical properties of slag were reviewed and the various areas of its applications are highlighted. The principal setback of its use; volumetric instability which results from hydratable oxides can be checkmated through appropriate methods like aging and steam test. In order to sustain its uses, microstructure analysis that can identify any harmful materials present in it is suggested. There is also an urgent need of standard methods to assess its suitability as highway construction material.

scholarly journals Use of Steel Slag as an Alternative to Aggregate and Filler in Road Pavements

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 345
Author(s):  
Giulio Dondi ◽  
Francesco Mazzotta ◽  
Claudio Lantieri ◽  
Federico Cuppi ◽  
Valeria Vignali ◽  
...  
Keyword(s):  
Raw Materials ◽  
Resilient Modulus ◽  
Steel Slag ◽  
Road Construction ◽  
Fine Aggregate ◽  
New Production ◽  
Bituminous Mixtures ◽  
Road Pavement ◽  
Waste Production ◽  
Marshall Stability

Today the use of Construction and Demolition Materials (CDM) can be considered as a suitable solution for the construction or the rehabilitation of road pavements. In this context, it is central to minimizing waste production, favoring the reuse through new production cycles to replace virgin natural raw materials. As illustrated in this study, steel slag has mechanical properties that justify its use as aggregate in the manufacture of bituminous mixes. In road construction, their use is focused on the substitution of fine aggregate and filler in bituminous mixtures. Mechanical characterizations, Marshall stability and indirect tensile resilient modulus (ITSM) tests were used to evaluate the laboratory performance of the mixtures. The research aims are to provide the use of these materials for the construction of the entire road pavement structure; in this study authors used these materials both in the characterization of cementitious layers and in those with bituminous conglomerate. In both cases, the use of steel slag has favored an increase of stiffness in the mixtures.

scholarly journals INTRODUCTION TO THE DEVELOPMENT OF A HYDRAULIC ROAD BINDER BASED ON MINERAL COAL BOTTOM ASH

2021 ◽  
Vol 9 (02) ◽  
pp. 766-772
Author(s):  
Saley Mahamadou ◽  
◽  
Issiakou Mahamadou ◽  
Abass Saley Abdoulatif ◽  
Salaou Nourou ◽  
...  
Keyword(s):  
Bottom Ash ◽  
Road Construction ◽  
Base Layer ◽  
Real Problem ◽  
Compression Tests ◽  
Power Station ◽  
Coal Bottom Ash ◽  
Physical Chemical ◽  
Natural Aggregates ◽  
Main Component

The use of natural aggregates with suitable characteristics for road construction presents in some regions a real problem of availability or cost related to transport. However, the resources in place, which are naturally unusable, can be used after treatment with Hydraulic Road Binders (HRB). In this study, we propose to valorize the mineral Coal Bottom Ash (CBA), a residue from the combustion of the SONICHAR power station in Niger, as the main component of an HRB.After a physical, chemical and mineralogical characterizationof the coal bottom ash, several proportions of the CBA powder and a cement type CEM I 42.5 were studied. Compression tests were carried out at 07, 28, 56 and 90 days to determine the class of the binder corresponding to the mixture selected.The performance of the HRB thus obtained was evaluated on two types of weakly clay soils (IP <= 12, NF P 94-051), having an initially insufficient CBR. The 3% treatment of this product made the two aforementioned soils suitable for use as a base layer.

Fracture Energy Analysis of Eco-Concretes in Japan

2010 ◽  
Vol 168-170 ◽  
pp. 985-989
Author(s):  
Carlos Aquino ◽  
Shogo Yagi ◽  
Takahisa Okamoto
Keyword(s):  
Portland Cement ◽  
Natural Resources ◽  
Fracture Energy ◽  
Industrial Waste ◽  
Molten Slag ◽  
Energy Analysis ◽  
Raw Materials ◽  
Natural Aggregates ◽  
The Cost ◽  
Land Filling

The raw materials from household garbage and industrial waste have increased its usage in the concrete and cement industries. These eco-materials have helped the environment, avoiding pollution, land filling or burning of waste and the usage of other natural resources. However, the cost of many eco-materials is still higher than that of common natural materials. It is necessary to study in detail its behavior and properties to decrease its cost and increase its performance. This research deals with Eco-cement and molten slag aggregate which main raw materials are household garbage and industrial waste. Concretes produced with Portland cement and Eco-cement were mixed with gravel, limestone, quartz and molten slag aggregates to compare its properties. The fracture energy, strength and modulus of elasticity tests were performed and discussed in this paper. The concretes produced with Eco-cement and molten slag aggregate show better results than those produced with Portland cement and natural aggregates.

scholarly journals PERENCANAAN BIAYA DAN METODE PELAKSANAAN PADA JALAN PAMEU-GENTING GERBANG KABUPATEN ACEH TENGAH

2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Faizal Bakrie
Keyword(s):  
Execution Time ◽  
Estimation Method ◽  
Value Added ◽  
Road Construction ◽  
Base Layer ◽  
The Road ◽  
Cost Planning ◽  
S Curve ◽  
Aggregate Base ◽  
The Cost

Cost Planning is planning a number of calculations necessary costs for material, labor, equipment and expenses related in implementation of the project Construction  and  Implementation  Method  road  is  a  basic  reference  in  the implementation of road construction by Standard Highways applied to the road Pameu- Genting Gate starting from the STA 45 + 850 s I d 49 + 500. Calculation of Budget Plan include Job Layers Base Down (LPB) Aggregate B, Works layer Piling Up (LPA) Aggregate A, (Prime Coat), Works Layer Binder AC-BC and Layer Aus AC-WC  (Surface). The method used is Estimation Method Index (E.l) Highways, 2010. From the calculation results obtained execution time of 166 working days,fee for Base Aggregate Base Layer B Amounting Rp.4. 032.876,00, -. Costs for Top Layer Aggregate Base A sum Rp.3.376.312,816.50, -. Fees for absorbing binder layer of Rp. 122,801,512.50, - Fees for Layers Between AC-BC (Surface) of Rp. 4. 732.319.951.10, - and the cost for AC-WC Aus layer Rp.2.331.857.250.00 So the sum total budget is of Rp. 14,752,380,906.00, - the value added tax (VAT) of 10% as well as the scheduling of the execution time using the S curve. and the method of implementation applied to the project include Job Layers Base Down Aggregate B, Layer Piling Up Aggregate A, (Prime Coat), Layer Binder AC-BC and and the cost for AC-WC (Surface) with a systematic way, accuracy, effective and efficient based on the plans.Keywords: Budget Plan, S curve, and Methods of Implementation

scholarly journals Production of Dry Lean Concrete by Sustainable Materials to Use in Road Sub-Base Layer for Rigid Pavement

2019 ◽  
Vol 8 (3) ◽  
pp. 750-757
Keyword(s):  
Steel Slag ◽  
Red Soil ◽  
Base Layer ◽  
Black Cotton Soil ◽  
Equivalent Material ◽  
Loamy Soil ◽  
Split Tensile Strength ◽  
Ld Slag ◽  
Sustainable Materials ◽  
Natural Aggregates

In the present scenario, due to the rapid demand on the infrastructure projects and consistent dependency over conventional materials have resulted in scarcity of the conventional construction materials and rise in construction costs. By replacing subbase layer of road with Dry lean concrete produced with sustainable materials, cost on the construction can be reduced by 51.4%. The various soil used in this study are red soil, loamy soil and black cotton soil. These soils are brought from different places of Bangalore. These soils are used to totally replace the fine aggregates. The LD slag obtained from JSW steel manufacturing plant from Bellary. To use the steel slag in concrete making process of Low strength Dry Lean Concrete, initial optimization of materials (steel slag) was done with the 7days strength. The most desirable and equivalent material to that of natural aggregates (i.e. steel slag) was found to be at 50% replacement and 100% replacement of coarse aggregate with LD slag. The each batch of concrete is prepared with soil and combination of 100% slag, 50% natural aggregates + 50% LD slag and 100% natural aggregates. The various soils used are red soil, loamy soil and BC soil. These cubes, cylinder and beams are tested for compressive strength, split tensile strength and flexure strength respectively for 7days and 28 days, and water absorption for each specimen of cube is measured at 28 days. It was observed that, strength of concrete produced using red soil, loamy soil are fulfilling the strength requirements of conventional dry lean concrete used as a sub base in rigid pavements. As per IRC: SP: 49-2014, the minimum strength requirement of cubes at 7 days is 7MPa.

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