International Journal of Engineering Research

K. Hari Kishan ¹, N. Vidyasagar Lal ¹, Sateesh Konni ²

Affiliations
1 Dept. of Civil Engineering, Gokul College of Engineering, JNTU Kakinada, AP, IN
2 Dept. of Civil Engineering, SVCET, JNTU Kakinada, AP, IN

Abstract

Utilization of industrial waste products as supplementary cementitious materials (SCM) in concrete making is very important aspect in view of economical, environmental and technical reasons. As these supplementary cementitious materials have different chemical and mineralogical composition, their effect on micro structural properties and strength performance vary considerably. While producing paper, various wastes come out from the various processes in paper industries. The preliminary waste from paper industry is named as hypo sludge. In this study the material obtained from the paper industry waste (hypo sludge) is admixed with Portland cement at different replacement levels. The properties of concrete investigated include compressive strength, split tensile strength, flexural strength, sorptivity and acid effect keeping optimum percentage of hypo sludge supposedly supplementary cementitious material (SCM). In this work, M20 grade was developed using IS method of mix design. Specimens of dimensions of 150 x 300mm cylinders for split tensile strength and dimensions of 100 x 100 x 500mm prisms for flexure strength and 150*150*150mm cubes were cast, with and without hypo sludge and tested under axial compression to justify the compressive strength for 7 and 28 days. Standard cubes were immersed in 5%HCL, 5%H₂SO₄ for inspecting the durability properties. The Sorptivity test has also been conducted. It is concluded that hypo sludge concrete had better mechanical properties and durability properties compared to normal concrete. Test results indicate that the use of hypo sludge in concrete has improved the performance of concrete from strength as well as durability aspects. The split tensile strength is less in hypo sludge concrete compared to normal concrete.

Keywords

Hypo Sludge, Concrete, M₂₀ Grade Concrete, Cubes, Cylinders, Prisms, Durability.

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M. Pavan Kumar ¹, Sateesh Konni ²

Affiliations
1 Dept. of Civil Engineering, SVP College of Engineering, Andhra University, AP, IN
2 Dept. of Civil Engineering, SVCET, JNTU-K, AP, IN

Abstract

Major structural collapses occur when a building is under the action of Dynamic Loads which includes both Earthquake and Wind loads. In these modern days, most of the structures are involved with architectural importance and it is highly impossible to plan with regular shapes. These irregularities are responsible for structural collapse of buildings under the action of dynamic loads. Hence, extensive research is required for achieving ultimate performance even with a poor configuration. In the present work, “Effect Of Vertical Irregularities of RC framed Structures by Using Non-Linear Static Analysis”, considering four types of 10-Storied 3-D frames (i.e., a symmetrical elevation configuration throughout its height and three other frames with unsymmetrical vertical configuration starting from sixth floor, placed at corner, at the center and at edge of the plan respectively) it is focused to study their response using Non-Linear Static Analysis. From the studied results of the analysis of four frames, it is observed that in the regular frame, there is no tensional effect in the frame because of symmetry. The response for vertically irregular buildings is different for the columns which are located in the plane perpendicular to the action of force. This is due to the tensional rotation in the structure.

Keywords

Earthquake, Response, Non-Linear, Vertical.

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