IARJSET ISSN (Online) 2393-8021 ISSN (Print) 2394-1588 International Advanced Research Journal in Science, Engineering and Technology Vol. 7, Issue 4, April 2020 Copyright to IARJSET DOI 10.17148/IARJSET.2020.7408 46 Utilization of Silica Fume in Cement Concrete Paving Block Mr.S.Gunasekar, M.E., (Ph.D) 1 , Shivani G 2 , Anbu Selvan D 3 , Shabarinathan D 4 Assistant Professor, Department of Civil Engineering, K.S.Rangasamy College of Technology, Tiruchengode 1 Bachelor of Engineering, Department of Civil Engineering, K.S.Rangasamy College of Technology, Tiruchengode 2-4 Abstract: Silica fume is a by-product of electric arc furnace reduction of quartz into silicon and ferrosilicon alloy used in the electronics industry. This is composed mainly by silicon and this by-product can be used as a mineral admixture in mortar and concrete. This waste product is already causing serious environmental pollution which calls for urgent way of handling the waste. In this paper, silica fume has been chemically and physically characterized, in order to evaluate the possibility of their use in industry. Samples of varied amount of silica fume mix with cement at 0, 5, 10, 15, 20, 25&30 % respectively. Aging times were 28 days for compression strength. Keywords: Interlocking concrete block pavement (ICBP), Silicon, SUDs I. INTRODUCTION Interlocking Concrete Block Pavement (ICBP) has been extensively used in many countries for quite some time as a specialized problem -solving technique for providing pavement in areas where conventional type of construction are less durable due to many operational and environmental constraints. ICBP technology have been introduced in India in construction, a decade ago for specific requirement namely footpaths, parking areas etc. but now being adopted extensively in different uses where the conventional construction of pavement using bituminous mix or cement concrete technology is not feasible or desirable .In this project , attempt has been made to reduce the proportion of cement and fine aggregate by adding the silica fume and crusher powder in various proportions.Silica fume is a by- product of ferro silica alloy are produced in electric furnace. Concrete containing silica fume can have very high strength and have high durability .Chukwudi Onyeakpa in this paper , a dual mould interlocking block machine with compaction effort was effectively constructed for interlocking block production. Silica fume is also known as micro silica, is an amorphous polymorph of silicon dioxide, silica. It is an ultrafine powder collected as an by- product of the silicon ferrosilicon alloy production and consists of spherical particles with an average particle diameter of 150 nm. These improvements stem from both the mechanical improvement resulting from addition of a very fine powder to the cement paste mix as well as from the pozzolanic reactions between the silica fume and free calcium hydroxide in the paste. Vireen Limbachiya has discussed that a study successfully reduced the cement content of concrete paving block by 40%. Sustainable urban drainage system (SUDs) is used for growing application of concrete paver block). K. Shyam Prakash had said, the mechanical properties and elastic modulus are improved by replacement of quarry dust. 100% replacement of sand with quarry dust gives better results in terms of compressive strength studies .The environmental effects and waste can be significantly reduced. M.Nishanth premhar The Effect of silica fume (SF) various strength properties of replacement of cement, coarse aggregate. 10% of cement weight replaced by silica fume. Result shows that 30% of silica fume in paver block attain its maximum compressive strength. Effects of silica fume on different properties of fresh and hardened concrete include: • Workability: With the addition of silica fume, the slump loss with time is directly proportional to increase in the silica fume content due to the introduction of large surface area in the concrete mix by its addition. Although the slump decreases, the mix remains highly cohesive. • Segregation and bleeding: Silica fume reduces bleeding significantly because the free water is consumed in wetting of the large surface area of the silica fume and hence the free water left in the mix for bleeding also decreases. Silica fume also blocks the pores in the fresh concrete so water within the concrete is not allowed to come to the surface. II. SILICA FUME Silica fume is a by-product in the carbothermic reduction of high-purity quartz with carbonaceous materials like coal, coke, wood-chips, in electric arc furnaces in the production of silicon and ferrosilicon alloys.
Utilization of Silica Fume in Cement Concrete Paving Block
Apr 26, 2023
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