Effects of raw domestic sewage on mechanical properties of concrete incorpporated with carying proportions of fly ash

Ratnoji, Shilpa S and Kanavalli, Shashank and Mallapur, Praveen S and Prakash, K B (2016) Effects of raw domestic sewage on mechanical properties of concrete incorpporated with carying proportions of fly ash. In: International Conference of Earth Science and Engineering, 17/06/2016, Nehru Institute of Technology, Coimbatore, INDIA.

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Abstract

Concrete is major component of construction sector. Construction sector also includes domestic raw sewage facilities. In domestic raw sewage treatment concrete is used in most of the components starting from collection, transportation, treatment and disposal. During its service life in domestic raw sewage facilities, concrete is subjected to various detrimental conditions. Concrete in domestic raw sewage is subjected to severe sulphate and acid attack. It is important to study the mechanical properties of concrete subjected to domestic raw sewage in order to minimize the sulphate and acid attack on concrete. In order to improve the performance of concrete it is preferred to use fly ash as mineral admixture. Class F fly ash conforming to IS 3812 (part 1) is used with varying proportions from 0 – 40% in replacement of cement with 5% incremation(0,5,10,15,20,25,30,35,40) i.e.,9 mixes to evaluate optimum dosage. Mix design of M30 concrete conforming to ANNEX B (Clause 6) of IS:10262:2009 was prepared. Specimens were casted for 9 different mixes of concrete to test compressive strength, split tensile strength and flexural strength. One set is cured in normal water for 28 days and then tested. One set of all 9 different mixes is cured in normal water for 28 days and then immersed completely in domestic raw sewage for 90 days and tested for above mentioned tests. One set of normal concrete mix is cured in normal water for 28 days and kept for curing in normal water 90 days more and then tested. The results obtained show that the performance of concrete with 35% fly ash showed the best result in all the three tests

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: fly ash, mix design, domestic raw sewage, compressive strength, split tensile strength, flexural strength
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 13 Jan 2017 13:38
Last Modified: 13 Jan 2017 13:38
URI: http://eprints.manipal.edu/id/eprint/148106

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