K. Mahendran ¹, N. Arunachelam ¹

Affiliations
1 Professor and Research Scholar Rural Technology Centre, Gandhigram Rural Institute-Deemed University Gandhigram, Dindigul – 624302, Tamil Nadu, IN

Abstract

Background/Objectives: Recycling and utilization of industrial by-products in the construction industry significantly complements the sustainable technology and development. Geopolymer is a new generation binder material which forms an eco-friendly alternative for the conventional Portland cement binders. Methods/Statistical analysis: This paper aims to analyse the performance of copper slag as an alternative for fine aggregate in geopolymer concrete. The combination of sodium hydroxide solution of 14 moles concentration and sodium silicate are used as an alkaline activator. The ratio between alkaline liquid and fly ash ratio is 0.4 for all the mixtures. The oven temperature at 60˚C for a period of 24 hours and ambient curing conditions are considered. Each specimen tested on the compressive strength, water absorption and density of the concrete. Findings: The test results show that the compressive strength increases with the increase of the copper slag content and a marginal change is observed with the decrease in strength gain as there is increase in the copper slag content. Application/Improvements: These results, thereby substantiates the fact that the copper slag is an alternative material for sand.

Keywords

Compressive Strength, Copper Slag, Fly Ash, Geopolymer, Sodium Hydroxide, Sodium Silicate

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K. Mahendran ¹, N. P. Vignesh ¹

Affiliations
1 Rural Technology Centre, Gandhigram Rural Institute, Dindigul - 624302, Tamil Nadu, IN

Abstract

Background/Objectives: The present study investigates the use of hypo sludge with cement and molasses for the preparation of stabilized red mud blocks. Methods/Statistical Analysis: The Laboratory test results show that the physical and the mechanical properties of the red soil were assessed. The unconfined compressive strength, modulus of rupture, Ultrasonic Pulse Velocity (UPV) and water absorption tests were performed for this soil with and without hypo sludge, cement and molasses. Findings: It has been identified that 15% of Hypo Sludge with Cement and Molasses as additives provides optimum stabilization to the soil and it is proven with the help of unconfined compression test. Applications/Improvements: The results show that the hypo sludge can be effectively used in red soil for the preparation of mud blocks.

Keywords

Cement Stabilization, Hypo Sludge, Molasses Stabilization, Paper Waste Ash, Red Soil, Ultrasonic Pulse Velocity (UPV)

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