In the quest to make construction materials more sustainable and durable, researchers have turned to innovative solutions, and a recent study from China is making waves in the industry. Lili Xue, a researcher from the College of Civil Engineering and Architecture at Jiaxing University, has been delving into the fascinating world of alkali-activated materials (AAMs) and their potential to revolutionize the energy sector.
Xue’s research, recently published in ‘Case Studies in Construction Materials’, focuses on the use of desulfurized gypsum (DSG) to mitigate the shrinkage problem in two typical alkali-activated materials: alkali-activated slag (AAS) and hybrid alkali-activated cement (HAC). Shrinkage is a significant issue in construction materials, leading to cracks and reduced durability, and finding effective solutions can have profound implications for the energy sector, where infrastructure longevity is paramount.
The study reveals that incorporating DSG into AAMs not only retards the hydration process but also reduces the formation of gel products, leading to a reduction in both autogenous and drying shrinkage. This is a game-changer, as it shows better efficiency than normal gypsum. “The higher Ca/Si of gel (amorphous C-A-S-H) phase and the higher crystalline/gel phases ratio in the DSG-AAM systems contributed to mitigating drying shrinkage,” Xue explains. This insight into the mechanisms underlying shrinkage opens up new possibilities for creating more robust and sustainable construction materials.
The research employed a suite of advanced analytical techniques, including MIP, 1H NMR, XRD, TG-DTG, and SEM-EDS, to gain a comprehensive understanding of the microstructure evolution in DSG-AAM systems. The findings suggest that the shift in gel pore and capillary pore size and distribution plays a crucial role in reducing shrinkage. This detailed analysis provides a roadmap for future developments in the field, paving the way for more durable and sustainable construction materials.
The implications of this research are vast. For the energy sector, where infrastructure often needs to withstand harsh conditions and maintain integrity over decades, the ability to reduce shrinkage in construction materials can lead to significant cost savings and enhanced safety. By mitigating the risk of cracks and other structural issues, these advanced materials can extend the lifespan of energy infrastructure, reducing the need for frequent repairs and replacements.
As the construction industry continues to evolve, the insights gained from Xue’s research could shape future developments in the field. The use of DSG in AAMs not only addresses a critical issue but also aligns with the growing demand for sustainable and eco-friendly construction solutions. The energy sector, in particular, stands to benefit from these advancements, as the integration of more durable and sustainable materials can lead to more resilient and efficient infrastructure.
The study, published in ‘Case Studies in Construction Materials’ (English translation of ‘Case Studies in Construction Materials’), highlights the potential of DSG in enhancing the performance of alkali-activated materials. As the industry looks to the future, the findings from Xue’s research could inspire new innovations and drive the adoption of more sustainable construction practices.
