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In this study, optimization of wood ash and fly ash by varying 0-100% of both in GPC were carried out by testing the concrete for compressive strength. From the previous literatures it could be noted that, GPC had a less brittleness and energy absorbent. To improve the brittleness and energy absorption capacity polypropylene fibre were added by 0, 0.5, 1, 1.5, and 2 % of volume fraction. Further, effects on addition of polypropylene of the optimized wood ash-fly ash based Geopolymer were studied. In this study, the mechanical properties such as compressive strength, tensile strength, flexural strength of geopolymer concrete were investigated. The results showed that, 30% replacement of wood ash increased the compressive strength by 12.2% than the conventional mix. Further, addition of 1 % of PP fibre had also increased the compressive strength, tensile strength, flexural strength by 3.7%, 15.6% and 5.13% respectively.

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Bio-Medical Waste Ash (BMWA) in Geopolymer Concrete (GPC) has been studied for its potential use as a substitute for Ground Granulated Blast Furnace Slag (GGBS). The raw materials were determined to have physical and chemical characteristics. Bio-medical waste ash was used for GGBS at 0%, 1%, 2%, 3%, 4%, 5% 6%, 7%, 8%, 9% and 10% by weight replacement. The mixing proportion of the GGBS, M-Sand, and Alkaline solution is 1:2.21:3.48, respectively. A compressive strength test was performed for all of the specimens. Results showed that up to 10 % of BMWA replacement for GGBS had higher compressive strength than a standard mix (0 % BMWA). Use 7 % BMWA after 28 days of curing, the maximum compressive strength of 39.8 N / mm2 was achieved. After 28 days of curing, specimens prepared using 13 M NaOH yielded a better compressive strength than the normal mix. At 28 days of curing time, the average compressive strength of 40.12 N / mm2 was reached.

This work examines the significance of using phase change material (PCM) in the construction works for conservation of energy. The objective of using PCMs is that the materials help in enhancing thermal performance of buildings as these have the advantage of high storage density with small temperature swing. Among various types of PCM, rice bran distilled fatty acid -grade A (RBDFA), which is a nonparaffin type was selected considering its thermal and physical parameters, particularly its melting point that falls between human comfort temperature range. Two types of investigations, numerical and experimental, were followed in the methodology to identify the thermal performance of building during PCM usage. The results indicated that inclusion of RBDFA in construction gives positive effect in maintaining less temperature variation at indoor. Practical application: Phase change materials are substances capable of storing or releasing thermal energy as latent heat. Phase change material has wide applications in many fields, such as building envelope design to reduce ventilating and air-conditioning (HVAC) energy consumption in buildings, solar energy utilization, waste heat recovery, thermo-regulated smart textiles, and active and passive cooling of electronic devices.

This research work aims at investigating the structural properties of hybrid fiber reinforced geopolymer concrete specimens such as load-deflection behaviour, stiffness, ductility, toughness index. In this research work, effort has been made towards reducing the brittleness of geopolymer concrete by the addition of glass (high modulus) and polypropylene (low modulus) fibers inside GGBS based geopolymer concrete made of M-sand. The glass and polypropylene fibers were added in various proportions such as 1/0, 0.75/0.25, 0.5/0.5, 0.25/0.75,0/1. The research work recorded enhancement of structural properties of geopolymer concrete under ambient curing. This work paved way for the utilization of fibers inside geopolymer concrete and replace cement concrete in all facets.