Abstract:
The cement industry, notorious for its significant contribution to global greenhouse gas
emissions, has drawn increasing attention in recent years due to its environmental impact. As
we strive to combat climate change, one crucial area of focus is improving the thermal
performance of buildings, which not only reduces energy consumption but also enhances
thermal comfort for occupants. Among the various components of a building's thermal
envelope, roof slabs stand out as key contributors to heat transfer, accounting for a substantial
50-60% of overall heat exchange. Addressing this thermal challenge necessitates innovative
solutions, and one such solution that has gained attention is the use of Rice Husk Ash (RHA)
as a sustainable material to augment thermal insulation in roof slabs. This approach aligns with
the broader goal of sustainable construction practices and the reduction of greenhouse gas
emissions by employing controlled waste disposal techniques that transform waste materials
into timely-needed sustainable building materials. The core concept behind this novel approach
involves the manipulation of the material's microstructure. To achieve low thermal
conductivity, the RHA is employed to induce a pore structure within the material. This pore
structure acts as a barrier to heat transfer, significantly enhancing the insulation properties of
the roof slabs. Simultaneously, the gaps and voids within the microstructure of the material are
filled with non-conductive Waste Brick Powder (WBP). This dual-purpose protection not only
improves the thermal performance of the roof but also contributes to enhanced waterproofing
abilities. The benefits of this innovative product are impressive, particularly when compared
to existing alternatives available in the market. In a comparative analysis, this new material
demonstrated a remarkable 69.5% reduction in thermal conductivity, making it an effective
solution for minimising heat transfer through roof slabs. Moreover, it exhibited an outstanding
89% improvement in its waterproofing abilities, which is crucial for maintaining the structural
integrity of buildings and ensuring the comfort of occupants. This groundbreaking
development represents a significant stride towards sustainable construction practices. By
harnessing waste materials like RHA and WBP, we not only reduce the environmental footprint
of construction but also produce materials that enhance energy efficiency and comfort within
buildings. As we continue to address the pressing challenges of climate change, solutions like
these offer a glimmer of hope for a more sustainable and environmentally friendly future in the
construction industry. In conclusion, the integration of Rice Husk Ash and Waste Brick Powder
in roof slab construction is a pioneering approach that holds great promise for reducing
greenhouse gas emissions, improving thermal comfort, and advancing sustainable construction
practices. This innovation not only contributes to energy-efficient building design but also
underscores the importance of repurposing waste materials to create valuable and
environmentally responsible building materials.