Informatics Publishing Limited

B. Siva Konda Reddy ¹, Vaishali G. Ghorpade ², H. Sudarsana Rao ²

Affiliations
1 Dept. of Civil Engg., JNTUH College of Engineering, Hyderabad, A.P, IN
2 Dept. of Civil Engg., JNTUA College of Engineering, Anantapur, A.P., IN

Abstract

It is expected that in the near future, the civil engineering community will have to produce structures in harmony with the concept of sustainable development through the use of high-performance materials with low environmental impact that are produced at a reasonable cost. Magnetic water concrete, synthesized from the normal materials used for manufacturing of concrete, provides one route towards this objective. This paper presents the effect of addition of magnetic water on workability, strength and mechanical properties of concrete tested show-encouraging results, and one can easily replace normal water with magnetic water by which quantity of cement used in any concrete mix reduces and can be made as new Eco-friendly construction material for future decades.

Keywords

Magnetic Water (MW), Structure of MW, North & South Poles, Workability, Strength, Stiffness

Full Text

   

Vaishali G. Ghorpade ¹, H. Sudarsana Rao ¹, V. Ravindra ²

Affiliations
1 Department of Civil Engineering, JNTU College of Engineering, Anantapur-515 002, A.P., IN
2 Department of Civil Engineering, JNTU College of Engineering, Kakinada, A.P, IN

Abstract

Fly ash is one of the residues generated in combustion of coal. Fly ash is generally captured from the chimneys of power generation facilities. Fly ash includes substantial amounts of silica (SiO₂), both amorphous and crystalline, and lime (CaO). Fly ash is commonly used to supplement Portland cement in concrete production, where it can bring both technological and economic benefits. Increased awareness of environmental hazards, steep rising prices of building materials, non-availability of space to stock the fly ash and other such factors have generated interest among the researchers to work on the gainful utilization of fly ash as an alternate building material with potential for replacing cement partially in constructions. Fly ash utilization in concrete not only reduces the cost due to cement savings but also contribute to reduced carbon-dioxide emissions contributing to environmental protection. It is well established by now that the concrete structures exposed to acidic environments deteriorated much faster when compared to their counterparts in non-aggressive environments. High-Performance-Concrete (HPC) is a new generation concrete which has the potential to perform well in aggressive environments. This paper presents the details of an experimental investigation planned to utilize fly ash in production of HPC. Acid attack tests have been conducted to measure the durability of HPC. This investigation is undertaken to study and define a better HPC mix containing locally available fly ash which can sustain in chloride and sulphate environments. The investigation examines the progressive deterioration of concrete mixtures containing various combinations of fly ash based HPC mixes exposed to sulphate and chloride solutions.

Keywords

Fly Ash, High Performance Concrete (HPC), Portland Cement, Acidic Environment.

Full Text

   

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.

Full Text

   

Vaishali G. Ghorpade ¹, H. Sudarsana Rao ¹

Affiliations
1 Department of Civil Engineering, Jawaharlal Nehru Technological University, Anantapur-515 002, A.P., IN

Abstract

Utilization of recycled aggregates in the production of concrete is now given lot of emphasis as it is viewed as an effective waste management practice, which can substantially contribute for the reduction of environmental deterioration. At the same time this is a cost effective technology saving natural resources. Recycled Aggregate Concrete (RAC) is now being used in many sectors of the construction industry. Though, lot of research has been reported on RAC, very little information is available about the effect of using recycled aggregate in the production of Fibre Reinforced Concrete (FRC). This paper presents the results of experimentation conducted to evaluate the strength and permeability characteristics of FRC produced with recycled coarse and fine aggregates. Three types of fibres viz., steel, glass and polypropylene were used in the production of FRC. Compressive, tensile, flexural and shear strengths of Fibre Reinforced Recycled Aggregate Concrete (FRRAC) have been evaluated from the experimentation. Chloride ion permeability has been determined as measure of permeability of FRRAC. The results of the study show that recycled coarse and fine aggregates can be successfully used in production of fibre reinforced concrete.

Keywords

Recycled Aggregate, Fibre Reinforced Concrete, Chloride Ion Permeability, Glass Fibres, Poly Propylene Fibres, Steel Fibres.

Full Text