Investigation of the Use of Electrical Furnace Slag as a Replacement of High Strength Concrete Aggregate
Marwan Dhafer Majeed AL-Jawdah;
Abstract
Steel slag is an industrial by-product obtained from steel manufacturing processes. Steel slag occupies approximately 15% from total produced steel. Types of slag, properties and chemical compositions depend on the type of furnace and impurity levels of required steel production.
The average world production of cured steel was cumulated from January to July 2017. It was approximately one billion tons according to (World Steel Association website), therefore; approximately 150 million tons are the average of world production of steel slag. These huge quantities of heavy byproducts are considered a huge environmental problem.
Coarse and fine aggregates occupy approximately 75% of the total concrete volume. Thus, the availability of good quality’s natural aggregate becomes difficult because the required quantity begin to dissipate. Therefore, looking for alternative sources of aggregate becomes very important.
The current research investigates the effect of replacing fine and coarse natural aggregate of high strength concrete by fine and coarse Electrical Arc Furnace Slag (EAFS) with different percentages. The main aim of this work is to use one of the local EAFS in Egypt in order to produce heavyweight high strength concrete. Besides the physical and mechanical properties, some of the durability aspects and gamma radiation resistance of the produced concrete are monitored and investigated herein.
Four groups of mixes have been prepared to study the effect of replacing natural fine and coarse aggregate with EAFS on the unit weight, consistency, compressive strength, splitting strength, flexural strength, absorption, permeability, chloride penetration, sulfate resistance and gamma radiation resistance of the produced heavyweight high strength concrete. In the first group, coarse aggregates were replaced by coarse EAFS with the proportions of (25%, 50%, 75% and 100%). In the second group, fine aggregates were replaced by fine EAFS with the proportions of (25%, 50%, 75% and 100%). In the third group, both the fine and coarse aggregates were replaced by fine and coarse EAFS with the proportions of (50% and 100%). In the fourth group, hematite was used as a replacement for the natural coarse aggregate with a percentage of 40% with/without 30% of coarse EAFS.
The results indicated that the compressive strength was improved by 47%, the flexural strength was improved by 20% and the split tensile strength was improved by 63% in the optimum mix (mixture of 100% replacement with coarse and fine EAFS). Also, water absorption, water penetration resistance and rapid chloride penetration resistance were improved with and increased ratio of steel slag in the concrete and rapid chloride penetration resistance; and sulfate attack resistance were improved by increasing the proportions of
The average world production of cured steel was cumulated from January to July 2017. It was approximately one billion tons according to (World Steel Association website), therefore; approximately 150 million tons are the average of world production of steel slag. These huge quantities of heavy byproducts are considered a huge environmental problem.
Coarse and fine aggregates occupy approximately 75% of the total concrete volume. Thus, the availability of good quality’s natural aggregate becomes difficult because the required quantity begin to dissipate. Therefore, looking for alternative sources of aggregate becomes very important.
The current research investigates the effect of replacing fine and coarse natural aggregate of high strength concrete by fine and coarse Electrical Arc Furnace Slag (EAFS) with different percentages. The main aim of this work is to use one of the local EAFS in Egypt in order to produce heavyweight high strength concrete. Besides the physical and mechanical properties, some of the durability aspects and gamma radiation resistance of the produced concrete are monitored and investigated herein.
Four groups of mixes have been prepared to study the effect of replacing natural fine and coarse aggregate with EAFS on the unit weight, consistency, compressive strength, splitting strength, flexural strength, absorption, permeability, chloride penetration, sulfate resistance and gamma radiation resistance of the produced heavyweight high strength concrete. In the first group, coarse aggregates were replaced by coarse EAFS with the proportions of (25%, 50%, 75% and 100%). In the second group, fine aggregates were replaced by fine EAFS with the proportions of (25%, 50%, 75% and 100%). In the third group, both the fine and coarse aggregates were replaced by fine and coarse EAFS with the proportions of (50% and 100%). In the fourth group, hematite was used as a replacement for the natural coarse aggregate with a percentage of 40% with/without 30% of coarse EAFS.
The results indicated that the compressive strength was improved by 47%, the flexural strength was improved by 20% and the split tensile strength was improved by 63% in the optimum mix (mixture of 100% replacement with coarse and fine EAFS). Also, water absorption, water penetration resistance and rapid chloride penetration resistance were improved with and increased ratio of steel slag in the concrete and rapid chloride penetration resistance; and sulfate attack resistance were improved by increasing the proportions of
Other data
| Title | Investigation of the Use of Electrical Furnace Slag as a Replacement of High Strength Concrete Aggregate | Other Titles | استخدام خبث الحديد الناتج من افران القوس الكهربي كبديل للركام في الخرسانة عالية المقاومة | Authors | Marwan Dhafer Majeed AL-Jawdah | Issue Date | 2017 |
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