Journal on Today's Ideas - Tomorrow's Technologies

Prakash Mallappa Munnoli1 , Tejashwini R. Pattar2 , Jyoti S. Garawad3  1,2,3S D M College of Engineering and Technology, Dharwad E-mail: munnolipm@gmail.com Abstract: Investigations were carried out on the changes in properties of concrete when steel slag is used in concrete in its normal form and after modifying its properties by infusing it with nano silica. The sand is replaced by steel slag and modified steel slag by 10%, 20% and 30% in M30 grade concrete. Tests results on compressive strength and workability of concrete revealed that, compressive strength of concrete cubes after 28 days increased by 25.4%, 26.4% and 45.2% for 10%, 20% and 30% respectively after replacing sand by steel slag. After modification of steel slag properties by infusing it with nano silica, the 28 days compressive strength was observed to be increased by 38.19%, 35.80% and 27.89% for 10%, 20% and 30% as compared to traditional concrete mix respectively after replacement. Infusing steel slag wit...

KEWAL, SANJAY K. SHARMA AND HIMMI GUPTA ME student (CTM) Department of Civil Engineering, NITTTR Chandigarh Professor & HOD, NITTTR Chandigarh 3 Assistant Professor NITTTR Chandigarh Email: Komalverma511@gmail.com Abstract:  Foundry sand is high quality silica sand with uniform physical characteristics. It is a byproduct of ferrous and nonferrous metal casting industries, where sand has been used for centuries as a molding material because of its thermal conductivity. Applications of foundry sand in Geopolymer Paver block, which is technically, sound, environmentally safe for sustainable development. In this study, partially replacement of fine aggregate in Geopolymer paver block by used foundry sand for determining the change in the compressive strength of paver blocks and cost of paver block. Partial replacement of fine aggregate in different percentage as like 0%, 20%, 40%, 60%,80% and 100%. The compressive strength has been determined at the end of 7, 14 and 28 da...

Damre Shraddha1 , Firake Hitali 1 , Dode Pradeep1 , and Shrikant Varpe2,*  Datta Meghe College of Engineering, Department of Civil Engineering, Mumbai University 2 Ambuja Cements Ltd, Mumbai, India *E-mail: shrikant.varpe@ambujacement.com Abstract: A common feature of sustainable buildings is that they drastically reduce emissions, material use and water use and with involvement of economic vitality, environmental, health, and social equity in it. As a whole, the study main concern is the environment and the construction and building technology to enhance natural world as well as building materials. In view to provide new knowledge to the contractors and developers on how to improve the construction industry methods and services by using coconut shells and to sustain good product performance and meet recycling goals, there is need to design a technical specification of concrete using coconut shell as aggregates that will meet the Indian standard requirements in order to help...

Sakshi Gupta  Assistant Professor, Civil Engineering Department, Dronacharya College of Engineering, Gurgaon, Haryana, India Email: ersakshigupta18@gmail.com Abstract: This paper reviews the recent developments and present state of the application of silica fume (micro-silica) and nano-silica for sustainable development of concrete industry. This would save not only the natural resources and energy but also protect the environment with the reduction of waste material. Limited work is done on use of nano-silica and microsilica in paste, mortar and concrete and whatever work is available is highly contradictory about their influence on mechanical strength development and durability properties. Various literatures have been reviewed to understand the influence of micro and nano-silica on fresh, hardened and microstructural properties of paste, cement mortar and concrete. Taking advantage of nanostructure and microstructure characterization tools and materials, the simultaneous...