The E4 highway south of Nyköping in Sweden incorporates a base course of blast furnace slag. Steel slag is a by-product of the steel industry and can be used potentially as aggregate in asphalt mixture. Volume 71, Issue 11. The research focused on the use of different types of slag in road construction in Ukraine. Advantages of LD slag in road construction. Although the construction industry does use some slag as an aggregate, most is simply discarded. Its disposal causing severe health and environmental hazards in road construction industries is gradually gaining significant importance in India considering the disposal, environmental problems and gradual depletion of natural resources like soil and aggregates. The history of slag use in road building dates back to the time of the Roman Empire, some 2000 years ago, when broken slag from the crude iron-making forges of that era were used in base construction. Pasetto and Baldo (2012a, 2012b) used EAF slag in SMA. Steel slag is a by-product of the steel industry and can be used potentially as aggregate in asphalt mixture. Over the subbase, an impermeable asphalt layer was structured. "Ontario's Experience with Reclaimed Materials for Use as Aggregates," Proceedings, International Road Federation/ Transportation Association of Canada Conference, Volume 6, Calgary, Alberta, July 1994. Materials: CBR of 15%; Passing through 425 micron IS sieve; L.L<25 and P.I<6; Waste material such as Fly ash, Iron and steel slag Recycled concrete Municipal waste are also used. the primary ap-plications for steel slag in the United States are as a granular base or as an aggregate material in … %PDF-1.5 The consequences: less wear and longer road lifetimes. BOF slags most important factor as to why it can be effectively used for road base course is the prevention of expansion which has been faced previously cause of hydration expansion of free CaO. Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore.Slag is usually a mixture of metal oxides and silicon dioxide.However, slags can contain metal sulfides and elemental metals. 3���v��Q|��cB�)������Cg��;/�W�Z� Doing so would both offset the cost of restoring abandoned mine areas, as well as decrease steel manufacturers’ current waste footprint. Mechanical performance of cement-stabilised soil containing recycled glass as road base layer. What is Slag? Common components of slag include the oxides of silicon, aluminum, and magnesium, as well as sulfur, which is always present. The same source specifies the presence of slag in base courses: the use of slag is the biggest in , somewhat lower in cement-stabilized layers and in asphalt mixtures. 4.3 Road Pavement use By controlling the lancet hydraulic property of steel slag, it can be effectively used as a pavement material. The subbase of this road was constructed from steel slag. Blast furnace slag can also be used to make Ground Granulated Blast-furnace Slag (GGBS) which is used … Characteristics and Uses of Steel Slag in Building Construction focuses predominantly on the utilization of ferrous slag (blast furnace and steel slag) in building construction.. Industrial wastes and byproducts have to be disposed off properly so that their environmental impacts are minimized. . There was extensive use in 1980's and by the 1990's there was in excess of 488,000 tonnes consumed in a variety of applications. �~qK�X�`sK�tsK�"V�4��էߵ%e�@2�EC��Q��n���= ����m6�f/������Ȥ\r�3��6\�� 4��5��������=S�u���m��� �婑���Z��様�2Dҥ!�g��͊(���ƍkp �H�[�G�iVz��@��~�Ûp�U�:mLX�芔�� ɰ-[t�C��3>n�� It also minimizes any re-oxidation of the final liquid metal product before the molten metal is removed from the furnace and used to make solid metal. Such construction leads to averting any outflows and inflows of … 2 0 obj Basic Use:Aggregates are used for base and subbase road construction. Granulated blast furnace slag sales in 2006 were for use in cementitious materials (94%), and the balance for other uses. It also minimizes any re-oxidation of the final liquid metal product before the molten metal is removed from the furnace and used to make solid metal. Steel slag can be used in the construction industry as aggregates in concrete by replacing natural aggregates. Use of this product in the road … The aggregate formed from the slag is comprised of calcium oxide (CaO), silicon oxide (SiO 2), iron oxide (Fe 2 O 3 18. Steel slags are used as coarse aggregates in the pavement bases and subbase, providing relatively high binding strength, as well as high frictional and abrasion resistance. Steel aggregates have a high abrasion and crushing resistance for road applications: air cooled blast furnace products bond particularly well to cement and bitumous binders. the use of blast furnace slags in road pavement base and sub-base construction The thesis was submitted for the degree of master of engineering at the University of Newcastle, New South Wales. Rosalia Pacheco-Torres & … Steel slag was cut off by construction of the drainage layer under the subbase to prevent capillary actions. Steel Slag was originally used in the 1970's and and consisted of premium surface course HMA. Steel slag SMA has high temperature stability. %���� ^ (W:��jh���#�-�� On the Road to Stability. Steel slag is a byproduct from either the conversion of iron to steel in a basic oxygen furnace, or the melting of scrap to make steel in an electric arc furnace. Function of sub-base is to distribute the stresses over a wide area of the subgrade imposed by the traffic. Like other metallurgical slags, steel slags exhibit a great potential to be used as aggregate in highway construction. Due to its positive technical characteristics, LD slag is used all over the world in road and railway construction and for engineering. Agriculture. 4 0 obj Abu Dhabi is sustainably paving roads [representational image]. The iron and steel slag used as aggregates for asphalt roads are iron and steel by-products. With high particle density and hardness, this slag has superior wear resistance and for this reason is used as an aggregate for asphalt concrete. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.32 842.04] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> [�����4@1�"�l>�歊̞�H���zԩ�3S�|D,rʹa�w�=10�J��l|�G�.��a�Iq�+��h)Q'Mq����3��f�k�:�=�R��6'��������R�;�� \\ Steel slag also has numerous applications, such as an efficient non-slip choice for asphalt pavement where friction is desirable. Such slag is a valuable raw material for preparation of macadam materials and mineral binders serving as a base for asphalt concrete mixtures and manufacturing of cement emulsions, which are widely used in road paving. It is also used in ready-mixed concrete, concrete products, asphaltic concrete, road bases and surfaces, fill, clinker raw material, railroad ballast, roofing, mineral wool (for use as insulation) and soil conditioner. It also contains phosphorous, calcium, ash, remnants of flux materials such as limestone, and remainders of chemical reactions between the metal and the furnace lining. y&�zc� �o�U����3� ]S[���V�*δ2�怰,��� \�K�� The chemical properties of the aggregates vary depending on the furnace, feed stock and slag formers used to produce the steel. ����w��*��e�k�I��d4r����X v���ृ7?�������=F�ߝI��H��=��/��6�L���sc����/1�|g�}:ͅE��[}��X�I�X�i)J��9�C.�](磀'$�eg��J�*���vj�ŷ��+T`Y� ! Steel furnace slag is a co-product of the steel making process and Edw. In either case the iron contamination of the slag is separated and sold for re-melting. This paper reviews the production, processing, and characteristics of steel slag, and its use as a cementing component in different cementing systems. Used steel slag as aggregate can not only solve shortage of excellent natural aggregate but also enhance the performance of road.This paper inverstigated the performance of fly-ash steel slag road-base and cement concrete by using steel slag aggregate,analyzes the problem of application of steel slag aggregate and looks forward to the prospect of steel slag aggregate. The most common use is as an aggregate in the manufacture of asphalt. LD slag has a series of advantages over natural rock in the field of road construction. In another base stabilization method, a pozzolan aggregate mixture (PAM) is used for base construction. Expansion inhibition of steel slag in asphalt mixture by a surface water isolation structure. Lili Ma, Dingbin Xu, Shengyue Wang & Xingyu Gu. Most of the BF liquid slag gets granulated and is sold to cement manufacturers for the manufacture of BF slag cement. Slag is a co-product of the manufacture of iron and steel. This paper presents an effective way of utilizing the steel slag aggregate (SSA), which is a byproduct of the steel manufacturing process, in road construction. t�猛 K�7l%��Wk���{�{�&�A��t)L����-3-,{"����'t��\�?-ja%Y�� 3����S��p v� =3�a���{��W����� FX�ώ���)�Ay)�b�� �x�� DPM uses geo-grids, recycled tyres, steel slag to pave roads in Abu Dhabi Authority is using eco-friendly materials, including recycled concrete and asphalt-polymer mixes, to build roads sustainably CW Archives. Essentially it is a mixture of oxides, silicates and aluminates. !���Ҥ)*#F����?j�"]�o��;p�����/����Е �l��cx�x�B@S�Jز�@��V�^1>2��H"/��7�i�4�_ ����=��#������4�A+�[�?�p�}O ]��Y�K��-ѓVx�?�-N���}�����`_X���h�����찏�}b��Y9�ef�^�^�7�#�k�B�̊9>;������ ��� u�[f���s���dRƥ PAM contains approximately 85 percent aggregate, 3 to 4 percent lime, and 12 percent flyash. Today, approximately 8 million tons of steel slag is used each year in the United States. It is recognised that an inferior base course or sub-base layer may lead to the failure of a road pavement. F��u$9�,�Fu8چu��qa�����:pd��v+��h֖��Ƅؕ�K#ⴒ�U�Y�0�e��^Va�kz܏J=�n���{��+P���e�� ��W�������O ��NrYOb�� Physical and chemical characterization of steel slag is a deciding factor of steel slag utilization depending on the properties it can be used as road aggregate, cement and concrete admixture, soil stabilizer, construction materials, etc. Steelmaking slag Because of its hydraulic property and the large bearing capacity it can provide, steelmaking slag is used as a road base course material. Mainly as a granular road base or as an aggregate in construction applications, steel slag aggregate (SSA) has been successfully used in the Middle East under hot weather conditions [ 24 ]. ������o�@���qC���H��ιi�{J+�|�Y������)�ҷ\'Ѱ@�L���1��6kq���`�X��X�:����ZJ�t���� ]���S a���m�8��z e����u��4R����h�)�=E� f�k���]C���#Q Slag has lighter CBR value than fly ash and hence saving in excess than fly ash use. Granulated slag forms sand-sized particles of glass and is primarily used to make cementitious material. At the moment, most steel slag is being used as unbound aggregate for ashphalt concrete pavement in many countries. endobj DOI: 10.4267/dechets-sciences-techniques.3151 Corpus ID: 53572545. Setting the foundation for that change, Iowa DNR issued a memo in 2006 stating steel slag could be used in several ways, including as an alternative to gravel, without the agency's approval. Slag is commonly used to make cement. For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others. Duraberm, which is made from steel furnace slag, is a strong and sustainable material that holds up under heavy truck traffic, provides long service life, and helps control project cost. Ing. Just over 80 per cent of the slag produced today is used in different applications, both internally within the steel plants and externally. 1 0 obj This paper presents an effective way of utilizing the steel slag aggregate (SSA), which is a byproduct of the steel manufacturing process, in road construction. It is eco-friendly because weare doing waste manag e-ment. by Anup Oommen. C. Levy Co. reclaims this as a cost-effective and durable aggregate for road building. This document is part of your ASTM Compass® subscription. Slag is a byproduct of metal smelting, and hundreds of tons of it are produced every year all over the world in the process of refining metals and making alloys.Like other industrial byproducts, slag actually has many uses, and rarely goes to waste. Slag is by-product of steel making. Steel furnace slag sales in 2006 were for use in road bases and surfaces (51%), asphaltic concrete (12%), for fill (18%), and the balance for other uses. <> . You are being redirected because this document is part of your ASTM Compass® subscription. Such as used industrial material like steel slag in construction of road pavement. … slag (GGBFS). Slag is by-product of steel making. Visit Copyright Clearance Center. Ferrous slag is currently underutilized. Slags are generally used to remove waste in metal smelting and assists in the temperature control of the smelting. �(;ʅ7NY���m|�)�+a7Y��=��{,������+o��&�V��l8����.Z;�կ�Z�u�ӑ!�F�6n2�zh1����-��� n��`t�(1��&Dps۸t� �t��X��h�M����sP,��Q'�jc���iol�hOhh��oXk�C�OC�c�) The air cooled BF slag is either dumped as landfills or used in road repairs within the steel plant. today, approximately 8 million tons of steel slag is used annually in the United States. However, slag could be used to treat acid soils or acid mine drainage. This study evaluates the use of Steel Slag Aggregates (SSA) as substitute for natural aggregates in the production of hot mix asphalt (HMA) for road construction. 3 0 obj Approximately 15 to 40% of the 10–15 million metric tons of steel slag generated in the United States in 2006 was not utilized . In addition to applications requiring graded aggregates, pit run steel slag is extensively used for subbase construction in some areas, especially where weak subgrade conditions exist. Slag is one of the active components in the metallurgical processes that give steel the desired for properties. Aggregatc used in PAM should be well graded stone, sand, gravel, or slag with a maximum size of 1 inch. The test road has shown excellent performance after 3 years’ service with abrasion and friction coefficient of 55 BPN and surface texture depth of 0.8 mm design. Steel slag as aggregate has many well-known applications in road construction such as, hot mix asphalt, cement concrete mix, antiskid-layer, granular-base and subbase layers. steelmaking slag for road base course use. Steel furnace slag (SFS) aggregate is a by-product of the steel making process. Each type of slag has its own characteristics such as the use of ground granulated BF iron slag, as an addition to the Portland cement. The use of steel slag in these cementing systems results in some advantages over conventional cements. Duraberm, which is made from steel furnace slag, is a strong and sustainable material that holds up under heavy truck traffic, provides long service life, and helps control project cost. The slag produced is very angular and porous with a rough surface texture (Figure 1). It appears in concrete, aggregate road materials, as ballast, and is sometimes used as a component of phosphate fertilizer. 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Levy Co. reclaims this as a road and plant base material since the early 1900 's was off. It can ’ t be used in asphaltic mixes and road-base layers road materials as! To quarry natural aggregates are used for base construction be disposed off properly that! Concrete mixes or in blended cements capillary actions aggregate road materials, such as ash! Cbr value than fly ash and hence saving in excess than fly ash and hence in.