The use of copper slag as a pozzolanic material for a partial substitute for ordinary Portland cement and its effects on the hydration reactions and properties of mortar and concrete have been reported in several publications (Al-Jabri et al., 2006, Taha et al., 2007, Malhotra, 1993, Tixier et al., 1997, Ariño and Mobasher, 1999, Douglas and Mainwaring, …
The slump value decreased from 180 mm to 60 mm with steel slag usage and concrete density increased by 10.2%. With the increment in the applied load, the slags in the concrete collapsed and the compressive strength decreased from 50.3 MPa to 40.5 MPa. The use of slag has improved fire resistance.
The recycling of steel slag has significant engineering, economic, and environmental benefits, and SSA concrete has been demonstrated as an efficient …
GGBS (Ground Granulated Blast-furnace Slag) is a cementitious material whose main use is in concrete and is a by-product from the blast-furnaces used to make iron. Blast-furnaces operate at temperatures of about 1,500°C and are fed with a carefully controlled mixture of iron ore, coke and limestone. The iron ore is reduced to iron and the ...
The discussed study concerns the recovery of steelmaking slag (SS), produced by a local steel plant, to make this by-product a raw material for portland cement clinker production. A lab study looks at this slag's influence on the raw meal reaction capacity and technological parameters (temperature and burning time).
Companies are exploring other ways to break the take-make-dispose production model by using waste for alternatives to clinker — for example, slag from …
In order to lower the environmental impact of the steel industry and ensure its economic sustainability, there have been significant studies finding the ways to recycle …
Slag Recyclers And Cement Makers. Slag Cement an overview | ScienceDirect Topics. Slag Cement. Slag cements are resistant to sea water only with an addition of >60% slag if the OPC is a nonmarine,160 The compressive strength of cements after 6months, 1year and 3years in sea water were measured by Miyairi et al. From: Lea''s Chemistry of …
The utilization of steel slag in China has undergone three stages, which are illustrated in Fig. 3. The first stage is the disposal stage, which occurred from the 1950s to the 1970s; in this stage, only a small part of the available slag was used for cement. The remaining slag was discharged into the environment and used to
Abstract. The valorization of industrial wastes plays a significant aspect in decreasing the environmental pollution. The discussed study concerns the recovery of …
Copper slag becomes substitute in concrete. pcm_admin 07/01/2010, 12:00 am. The vast amount of copper slag, a by-product obtained during smelting and refining of copper, was for many years …
The electrical resistivity of CF reinforced cement mortars was lower if steel slag aggregates (from industrial slag recycling) were used. Percolation threshold was reached at lower levels of CF content if limestone fine aggregates (percolation threshold approx. at 1.1 vol%) were substituted by slag particles (lower than 0.97 vol%).
But slag itself has value, and technologies have emerged to recycle and reuse reprocessed, granulated slag in different building materials, such as cement, brick, concrete aggregates, wall materials, …
3.3. Physical properties. The typical copper slag is generally black or dark brown in colour and its density is in the range of 3.2 – 4.5 g/cm 3, mainly depending on the content of Fe (Sarfo et al., 2017b).The average true density of copper slag is approximately 3.8 g/cm 3, which is denser than the ordinary natural aggregates (Shi et al., 2008). ...
GGBS is a finely powdered iron slag by-product of the steel-making industry. The mechanical characteristics of M40 grade concrete with partially replaced cement of 30%, 40%, and 50% by GGBS are examined in this study. All mix design specifications and material test data are carried out per IS codes, for a curing time of 7, 14, and 28 days ...
The transformation of steelmaking slag into a strong structural material through high gravity carbonation (Chang et al., 2012). Now known as the carbstone method (Quaghebeur et al., 2015), it consists of three steps: pre-treatment, shaping and curing. The BOS slag is first homogenized into a powder and then mixed with the appropriate …
Ways to Recycle and Reuse Concrete. slag recyclers and cement makers. slag recyclers and cement makers Recycled sacks are used by plantation and agro-chemical industries which buy sacks at about INR5 or 6/bag Conclusion Globally woven polypropylene cement sacks are recycled and are … اقرأ أكثر
Steel slag is largely used in road construction, cement production, internal recycling, civil engineering, and agriculture in Japan, Europe, the United States, and China. According to data from the Nippon Slag Association (2016), steel slag production in Japan reached about 14.1 million tons in 2016, and the utilization rate was 98.4%.
Heidelberg Materials manufactures a variety of cement, including slag cement. Slag cement enhances the traditional concrete benefits of strength and durability while …
Copper smelting slag is a solution of molten oxides created during the copper smelting and refining process, and about 1.5 million tons of copper slag are generated annually in Korea. The oxides in copper smelting slag include ferrous (FeO), ferric oxide (Fe2O3), silica (SiO2 from flux), alumina (AI2O3), calcia (CaO) and magnesia …
Waste recycling and reuse is an important component of sustainability. Extensive research is being conducted to address this issue by incorporating industrial by-product such as steel slag, copper slag, fly ash, ferro-chrome slag, and so on into the construction industry. Steel slag, which is mostly calcium carbonate, is created as a by …
The objective of this investigation is to produce concrete by replacing fine aggregate and coarse aggregate with copper slag and steel slag. After 7, 28 and 56 …
This was accomplished by partial replacement of cement with large volumes of fly ash or blast furnace slag and by using recycled concrete aggregate. Five basic concrete mixes were considered. These were: (1) conventional mix with no material substitutions, (2) 50% replacement of cement with fly ash, (3) 50% replacement of …
CONCLUSION The utilisation of copper slag in concrete provides additional environmental as well as technical benefits for all related industries. ... pp. 1115-1120, 2008. Caliskan, S., Behnood, A., Recycling copper slag as coarse aggregate: hardened properties of concrete, Proceedings of seventh international conference on concrete technology ...
slag recyclers and cement makers. NewsCasting ILMC. Aug 06, 2022. Ramcar, Inc. is the largest integrated manufacturer of leadacid storage batteries in the Philippines and Southeast Asia, with subsidiary companies engaged in the manufacture of pure refined lead, low maintenance and no maintenance lead alloys, lead oxide, battery …
Steel slag is a solid waste produced in crude steel smelting, and a typical management option is stockpiling in slag disposal yards. Over the years, the massive …
Carbonation treatment was introduced in the recycling of concrete wastes in recent years. Recycled concrete wastes after carbonation treatment exhibited a significant improvement in reducing water demand, densifying microstructure, and promoting mechanical behaviour (see Table 1).Zhan et al. found the hydrated cement in …
The substitution of the cement by slag provides two clear advantages; the first one is the use of a waste that must be managed in a landfill, and the second one, …
BOS Slag. Process. When molten iron (referred to as "hot metal") from the blast furnace is to be converted into steel, the main tasks are the removal of carbon, silicon and phosphorus. The LD (Linz-Donawitz) process is by far the most widely used, and takes its name from the towns where it was developed.
The substitution of the cement by slag provides two clear advantages; the first one is the use of a waste that must be managed in a landfill, and the second one, ... Thivya J. Effect of copper slag, iron slag and recycled concrete aggregate on the mechanical properties of concrete. Resour. Policy. 2017; 53:219–225. doi: ...
In short, the cement industry is one of the "hard-to-abate" sectors — those that face the biggest challenges in reducing carbon dioxide, directly or indirectly. Production of 10 tonnes of ...
During the blast furnace process limestone (CaCO 3) flux is added, to collect the waste products produced: silica (SiO 2), phosphorus pentoxide (P 2 O 5), calcium sulfide (CaS), magnesia (MgO) and alumina (Al 2 O 3).This forms blast furnace (BF) slag, which floats on top of the surface of the hot metal (Peters, 1982).The blast furnace is …
Slag cement, originally known as granulated blast-furnace slag, begins with the production of iron. The heart of the process is the blast furnace that refines iron ore into iron. The ingredients are heated to nearly 1500 degrees Centigrade to form two components: iron and molten slag. The iron is used to produce steel, and the molten slag is ...
1. Based on different steelmaking processes: Blast furnace slag: Further divided into granulated blast furnace slag and air-cooled blast furnace slag. Steelmaking …
These slags are recycled to the smelting furnace where their oxide is sulfidised to Cu 2 S. Oxidised copper may be present in the form of CuO, CuSO 4, CuO·CuSO 4 or CuO·Fe 2 O 3. ... From mortar strength tests with cement/slag/water ratio of 1/2/0.55 the ball milled slag gave higher strength. The effects of several kinds of slag …
2.1. The Process of Producing Recycled Aggregates (RA), Recycled Cement Mortar (RCM), and Fly–Ash Slag (FAS) The preparation of cement composites, due to the two types of waste used (fly–ash slag and concrete rubble), was based on two main types of treatment: (1) the process of producing recycled coarse aggregate (RCA) and recycled …
The utilization of solid waste is the challenge for the civil and environmental engineers to utilize the waste from different industry to excel the sustainable development, and in the same time, it is matching with the cost concern of the present materials. Copper slag is a by-product obtained during smelting and refining of copper. The waste copper …
Alabi & Mahachi [103] observed the chloride ion penetration of geopolymer recycled concrete (GPRC) incorporating cupola slag aggregates and revealed that geopolymers blended recycled concrete with 30% cupola slag aggregates and 70% granite have a stronger resistance to the penetration of chloride ions compared to all the …
