It is a very good research topic. It is actually a 2-in-1 research topic.

This topic is surely suitable for a MSc research, combining the issues of sustainability and enviroment in the built environment. While implementing it, the following environmental-sustainability aspects can be considered and co-evaluated:

-bioclimatic architecture principles,

-passive and low-energy systems in the construction industry focusing on maintaining thermal indoors comfort,

-nearly zero-energy buildings (nZEBs) conceptualization, ensuring the facilitation of acceptable mechanical heating and cooling conditions, through designing high performance building envelopes,

-building energy management system (BEMS) conceptualization, based on high efficiency energy systems that can be effectively managed and sized.

-thermal insulation, water-repellent and hydric properties of the waterproof coatings, as well as localized exploitation of building materials,

All aspects above are regulated, controlled and monitored under local environmental and construction directives, regulations, and laws, which should be differentiated from place to place and from time to time, even at the same places. Therefore, one or two case studies they should be co-presented and co-evaluated in terms of "existing buildings construction for an optimized environmental sustainability".

From my point of view, the utilization of plastic-glass waste in the construction industry is a very booming topic as it participates in achieving one or more sustainable development principles in the construction industry. It can produce more sustainable construction materials and constitute an efficient thermal mass for both passive cooling and heating systems when the bottles are filled with water. I recommend the following papers as examples:

1- A Passive Solar Heating Experiment Utilizing Plastic Water Bottles As Thermal Mass. info:4JKxeziix3IJ:scholar.google.com

2- Utilization of Waste Plastic and Waste Glass Together as Fine and Coarse Aggregate in Concrete. Doi: 10.23918/eajse.v6i2p1

I also believe that this might be a fruitful master of science topic. However, it can only be considered as a convenient research, if aspects such as fire safety are considered.

Dear Ewald Kuoribo

It is a great and much sought-after research topic considering the current issues related with managing the glass wastes. Wish you all the best