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Cement plays a significant part in concrete, and with the increasing demand for concrete, cement output varies day by day, allowing production to carbon dioxide emissions. As well as marble processing creates stone slurry and solid discards. These are often dumped irresponsibly on open land, polluting the soil. This improper disposal of marble waste is a major environmental concern. This study aims to propose a sustainable solution for reusing this waste material as a concrete additive.

A total of 135 concrete cubes of size 150 × 150 × 150 mm, 54 concrete cylinders of size 150 mm dia. and 300 mm height and 54 concrete beams of size 150 × 150 × 700 mm were cast. The replacement was 0%, 2.5%, 5%, 7.5%, 10%, 12.5%, 15%, 17.5% and 20% by weight of cement with marble dust to create M30 concrete with a water-cement ratio of 0.45. The test was performed to find the compressive strength (CS), flexural strength (FS) and split tensile strength. Also, durability tests like rapid chloride penetration test (RCPT), acid attack, ultrasonic pulse velocity (UPV) and water permeability test were performed.

After 7 and 28 days of curing, it was found that replacing 5% of cement with marble powder led to an initial strength improvement of up to 25% for both curing periods. However, further increases in marble dust resulted in an inconsistent decrease in strength for all the mixtures. Also, durability properties like acid attack test, water permeability test and RCPT, showed good performance at the optimum percentage of waste marble powder (WMP) as cement replacement. The microscopic analysis revealed a denser pore structure at lower WMP replacement levels, likely due to the powder filling in gaps.

This study reveals that by substituting 5% (optimum) of cement with WMP, there was CS improvement up to 8.4% and 17% for both 7 and 28 days of curing. WMP is typically finer than cement particles and fills the voids in the concrete more effectively, resulting best performance at optimum percentage against RCPT, UPV, acid attack and water permeability.

After completion of the case study, students will be able to recall the fundamental concepts of group arrival and the check-in process within the hotel industry; explain the various operational procedures used to enhance a smooth group check-in in hotels; use the steps defined in group check-in procedure to improve service efficiency in hotel operations; and examine and evaluate the optimal solution for a smooth group check-in for hotels.

“The Big Fat Indian Wedding” delves into the challenges faced by Hotel Plaza Blu, a business hotel in Pune, Maharashtra, in 2023. A big wedding group was arriving at the hotel, which comprised almost 350 adults and 120 children. Mr Parag Patil, the front office manager, had done all the preparations for group arrival but just one hour before the arrival Mr Suresh Menon, the group coordinator, came and informed that 150 additional guests would be arriving, as the other hotel, where arrangements for these guests were made, had a major electricity generator breakdown and the hotel was in complete blackout. Patil had the challenge of formulating an action plan to achieve a smooth group check-in with the last-minute changes.

Executive development programmes and graduate-level courses in non-profit hospitality and tourism management might benefit from this case study. The operational management courses in the BBA, UG management programmes might all benefit from using this case study.

Teaching notes are available for educators only.

CSS 9: Operations and Logistics.