Investigation of Mechanical and Thermal Performance of Nanoclay Modified Concrete for Energy Efficiency

Abstract

In recent years, the integration of Nanoclay (NC) into concrete has garnered significant global attention due to its potential added benefits and importance in the construction industry. However, the existing literature lacks sufficient experimental validation and empirical analysis pertaining to several unexplored key properties, such as thermal resistance, conductivity, diffusivity, and fire resistance. This study aims to address these knowledge gaps and contribute to the current body of literature by providing a comprehensive review of the advantageous effects of NC incorporation on the aforementioned properties of concrete. A thorough examination of available data was conducted, focusing on the mechanical and thermal characteristics of concrete after the inclusion of NC in the mix design. The findings of this critical review indicate that the incorporation of NC into concrete can reduce building energy consumption and enhance thermal insulation properties. Moreover, the integration of NC in concrete was found to improve various thermal features, including thermal stability, fire resistance, thermal performance, thermal behavior, resistance to thermal cracking, and resistance to thermal degradation. In addition, the inclusion of NC in concrete was observed to decrease thermal conductivity, thereby facilitating effective thermal insulation and resulting in lower energy consumption during heating and cooling periods. Simultaneously, the integration of NC was found to bolster the compressive, flexural, and tensile mechanical properties of concrete. Furthermore, the incorporation of NC into concrete materials has the potential to mitigate negative environmental impacts, such as pollution and poor air quality. This comprehensive review provides valuable insights into the benefits of NC integration in concrete, paving the way for further research and innovative applications in the construction industry.

Nanoclays as fillers for performance enhancement in building and construction industries: State of the art and future trends

“…The incorporation of nanoclay into concrete has gained worldwide recognition in recent years, owing to its immense potential advantages and its growing significance within the construction sector. The attention given to clay minerals is justified by their abundance, accessibility, effectiveness, and ecological properties and have a unique crystal structure, are recyclable, easy to use, and possess remarkable physicochemical properties such as specific surface, surface charge, and cation-exchange capacity [33].…”

“…Their precise distribution fills nano-sized voids in cement mortar, limiting micro-crack propagation and improving strength, workability, consistency, and water absorption [98]. The incorporation of nanoclay into concrete has several beneficial effects, including reducing building energy consumption, enhancing thermal insulation properties, improving thermal stability, fire resistance, thermal performance, behavior, resistance to cracking and degradation, and decreasing thermal conductivity, which leads to effective insulation and lower energy consumption during heating and cooling periods [33]. Nanoparticles contribute to the development of strength in cement-based materials by enhancing the hydration process of cement, resulting in the formation of calciumsilica-hydrate (C-S-H) and improved overall strength [99].…”