Effect of Waste Foundry Sand as Partial Replacement of Sand on Acid Resistance of Binary Blended Concrete using Metakaolin
- April 14, 2018
- Posted by: RSIS
- Category: Civil Engineering
International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue IV, April 2018 | ISSN 2321–2705
Syed Jawwad Ahmed1, Mohd Nazim Raza2
1,2Department of Civil Engineering, MJCET, Hyderabad, India
Abstract: Metal foundries use large amounts of sand as part of the metal casting process. Waste Foundry sand is a waste material. The degradation of concrete sewer pipes by sulphuric acid attack is also a problem of global scope. The idea is to minimise this degradation while keeping it as economic as possible. In an effort to use the WFS in large volume, research has being carried out for its possible large scale utilization in making concrete as partial replacement of fine aggregate. The present work is focussed on the study of the effect of various percentages of WFS on durability (namely acid attack) of M30 grade concrete. To find the best combination of waste foundry sand and metakaolin to resist the sulphuric acid attack. Mix M10W10(Metakaolin 10%,waste foundry sand 10%) showed best resistance to acid attack. The decrease in compressive strength too was not drastic when compared to other mixes.
Keywords: waste foundry sand, metakaolin, sulphuric acid, compressive strength, M30 grade concrete
I. INTRODUCTION
Foundry sand is high quality silica sand with uniform physical characteristics. It is a by-product of ferrous and nonferrous metal casting industries. Sand has been used for centuries as a moulding material because of its thermal conductivity. It is a by- product from the production of both ferrous and nonferrous metal castings. The physical and chemical characteristics of foundry sand will depend in great part on the type of casting process and the industry sector from which it originates. In modern foundry practice, sand is typically recycled and reused through many production cycles. Industry estimates that approximately 100 million tons of sand are used in production annually of that 6 – 10 million tons are discarded annually and are available to be recycled into other products and in industry. In India, approximately 2 million tons of waste foundry sand is produced yearly.
