T. Jena ¹, K. C. Panda ¹

Affiliations
1 Department of Civil Engineering, ITER, Siksha ‘O’ Anusandhan University, Bhubaneswar - 751030, Odisha, IN

Abstract

This paper investigates the influence of using environmental by-product materials such as Silpozz and Fly Ash (FA) in concrete properties to resist saline water. The mix design is targeted for M30 grade concrete. Five concrete mixtures were designed to have the same degree of workability with water to cementitious material ratio of 0.43. The plain cement concrete samples made 0% replacement of FA and Silpozz with cement. The blended cement concrete samples made with 10% replacement of FA and 10%, 20%, 30%, and 40% replacement of silpozz with cement. Two set of samples (cube, cylinder and prism) have been prepared. One set of sample, after 28 days of Normal Water Curing (NWC) was being immersed in sea water for 7, 28 and 90 days and the other set of samples have been cured in normal water for 7, 28 and 90 days. The studied parameters include the compressive strength, flexural strength and split tensile strength of NWC and Sea Water Curing (SWC) samples after 28 days of NWC for 7, 28, and 90 days curing period. The acid soluble chloride and water soluble chloride contents were measured through the concrete samples of 28 days SWC after 28 days of NWC. The obtained test results indicated that the use of FA and Silpozz in concrete showed significant resistance to chloride penetration up to 10% replacement of FA and 30% replacement of Silpozz with cement. The carbonation depth of concrete samples for 90 days SWC after 28 days of NWC was measured. There is no significant change in depth of carbonation. The percentage increase in compressive strength for blended cement concrete in NWC is better than the samples in SWC after 28 days of NWC.

Keywords

Acid Soluble Chloride, Compressive Strength, Sea Water, Silpozz, Water Soluble Chloride

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M. Mishra ¹, K. C. Panda ²

Affiliations
1 Department of Civil Engineering, NIST, BPUT, Berhampur-761008, Odisha, IN
2 Department of Civil Engineering, ITER, Siksha ‘O’ Anusandhan University, Bhubaneswar-751030, Odisha, IN

Abstract

Now-a-days lot of waste material is generated owing to population growth and life style. With Enormous use of motor vehicles, the waste rubber tyre became a big environmental issue as it is not easily biodegradable. Hence, the research efforts are focussed to use this waste advantageously by understanding the performance and durability characteristics of rubberized concrete. The present study is carried out an experimental investigation on fresh and hardened properties of Self Compacting Concrete (SCC) containing waste tyre rubber. In Self Compacting Rubberized Concrete (SCRC), the replacement of aggregate is 0%, 5%, 10%, 15% and 20% with coarse rubber chips. The size of rubber chips are used in the present study is 5mm and 10mm. The total volume of rubber chips are replaced in coarse aggregate i.e. 40% from 5mm size and 60% from 10mm size. To obtain fresh properties in SCRC the slump, T500, J-Ring, V-Funnel, L-Box and U-Box tests are conducted whereas for hardened properties the Compressive, Flexural and Split Tensile tests are conducted. The grade of concrete used in the present study is M30, whereas for SCC, the mix design is carried out in trial basis. The fine aggregate quantity increased 34% and coarse aggregate quantity decreased 34% with Water Cement ratio (W/C) 0.375 and 0.4% of Super plasticizer. In this study, an attempt has been made to identify the fresh and hardened properties necessary for the design of concrete mix. The study demonstrates the potential use of rubber chips in concrete.

Keywords

Rubber Chips, Self Compacting Rubberized Concrete (SCRC), Super Plasticizer (SP), Workability

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