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G. Reddy Babu ¹, H. Sudarsana Rao ², I. V. Ramana Reddy ³

Affiliations
1 Department of Civil Engineering, SKIT, Srikalahasti-517 640, A.P, IN
2 J.N.T.U. College of Engineering, Anantapur, A.P., IN
3 Department of Civil Engineering, S.V.U. College of Engineering, Tirupati, A.P, IN

Abstract

The feasibility of treated industrial wastewater as mixing water and effect of its constituents on cement mortar was experimentally evaluated. Cement mortar specimens were cast using deionised water (DW), tap water (TW), treated paint industry wastewater (TPIWW), and presence of zinc (Zn), lead (Pb), copper (Cu), cadmium (Cd), nickel (Ni), iron (Fe) and chromium (Cr). The results, when compared with the results of reference specimen made with DW, showed that TPIWW significantly and TW insignificantly increased the setting times and were made indistinguishable strength variations. Compressive and flexural strength increased as the concentration of metals increased, when compared with reference specimens. Therefore, TPIWW is found to be suitable for mixing water in cement mortar with no adverse effects and metal ions are positively interacted with cement mortar.

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G. Reddy Babu ¹, M. Srimurali ¹, M. Vijaya Sekhar Reddy ¹, I. V. Ramana Reddy ¹

Affiliations
1 Department of Civil Engineering, S. V. U. College of Engineering, S. V. University, Tirupati-517 502, Andhra Pradesh, IN

Abstract

Textile effluents pose considerable impact on soil and water due to indiscriminate discharge of partially/untreated effluent. Development of effective treatment technology for colour removal is difficult, since dyes are continually being upgraded to suit market demands. This investigation aims at feasibility of sorption for colour removal of spent orange dye effluent using powdered activated carbon (PAC). Experimental results show that the colour removal efficiency is maximum (93%) at pH 2 for a dose of 1.5 g/L of PAC.

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M. Vijaya Sekhar Reddy ¹, I. V. Ramana Reddy ², K. Madan Mohan Reddy ¹, N. Krishna Murthy ³, T. Venumadhav ⁴

Affiliations
1 Department of Civil Engineering, Sri kalahasteeswara Institute of Technology, Srikalahasti, AP, IN
2 Department of Civil Engineering, Sri Venkateswara University College of Engineering, Tirupati, AP, IN
3 Engineering Department, Yogi Vemana University, Kadapa, AP, IN
4 Department of Civil Engineering, Audi Sankara College of Engineering, Gudur, AP, IN

Abstract

This paper presents the evaluation of mechanical properties of binary blended concrete. Binary blended concrete have been developed by the individual replacement of Supplementary Cementing Materials (SCM's) like Fly-ash, Silica fume and Metakaoline. The results of binary blended concrete are compared with those of control concrete. The main purpose of this investigation is to develop confidence among user agencies in India to use mineral and chemical admixtures in a desirable proportion in most of the construction works. The paper presents experimental studies conducted on M₃₀ grade of concrete using SCMs and chemical admixtures in various proportions. The cubes and cylindrical specimens after de-moulding were stored in curing tanks and on removal of cubes and cylinders from water the compressive strength and split tensile strength were conducted at 7days, 28days, 90 days and 180 days. The test results were compared with individual percentage replacements of SCMs for M₃₀ grade concrete with and without chemical admixture.

Keywords

Supplementary Cementing Materials (SCMs), Binary Blended Concrete, Compressive Strength, Split Tensile Strength, Flyash (FA), Silica Fume (SF), Metakaoline.

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M. Vijaya Sekhar Reddy ¹, I. V. Ramana Reddy ², K. Madan Mohan Reddy ¹, C. M. Ravi Kumar ³, K. Chandra Sekhar Reddy ⁴

Affiliations
1 Department of Civil Engineering, Srikalahasteeswara Institute of Technology, Srikalahasti, AP, IN
2 Department of Civil Engineering, Sri Venkateswara University College of Engineering, Tirupati, AP, IN
3 Department of Civil Engineering, VTUBTDC, Davanagere, Karnataka, IN
4 Department of Civil Engineering, Siddharth Institute of Engineering & Technology, Puttur, Chittoor, A.P, IN

Abstract

In today's competitive environment it is becoming important to reduce the construction cost in one or other way. Now a day's OPC is widely used and it is the costly ingredients in the production of concrete. However many countries have severe shortage of cement although there requirements are vast. The manufacture of OPC is expensive and skill intensive process, besides polluting the environment heavily production is associated with the emission of carbon dioxide which is a significant source of global warming. Pozzolanic materials are widely used in concrete and mortars for various reasons particularly for reducing the amount of cement required for making concrete and mortar which lead to a reduction in construction cost. This paper presents the results of study under taken to investigate the feasibility of using Supplementary Cementing Materials (SCMs) as partial replacements of cement. The effects of replacing cement by these SCMs on compressive strength, split tensile strength are evaluated in this work. Both compressive and spilt tensile strength is evaluated at 7days, 28 days, 90 days and 180 days.

Keywords

Supplementary Cementing Materials (SCMs), Compressive Strength, Split Tensile Strength, Flyash (FA), Silica Fume (SF), Metakaoline.

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