Cement and concrete are the largest manufactured product on Earth, which are the backbone of our modern built structure. The production of cement is characterized with high energy consumption and CO2 emission, which accounts for 8% of the total carbon emissions around the world. Therefore, reducing CO2 emissions and increasing materials efficiency throughout the cement value chain has become a major issue for the sustainable development. Globally, developing low-carbon and sustainable cement and concrete has been also the urgent task of the industry recently.
Calcined clay-based cementitious materials have been a focus of research in the field of low-carbon cementitious materials in recent years. Taking the most typical Limestone Calcined Clay Cement (LC3) as an example, compared to Portland cement, the clinker content of LC3 can be reduced up to 50% by adding limestone and calcined clay. LC3 also shows outstanding mechanical and durability properties, showcasing significant potential for widespread replacement of traditional Portland cement. Currently, LC3 has gradually gained popularity and application in regions such as Latin America and South Asia.
The International Conference on Calcined Clay for Sustainable Concrete (ICCCSC) which has been held in Switzerland (Lausanne, 2015), Cuba (La Havana, 2017), India (New Delhi, 2019), and Switzerland (Lausanne, 2022) has become an important academic event for low-carbon sustainable cement concrete. The 4th ICCCSC will be held in Nanjing, to focus on low-carbon sustainable cement production, performance, environmental efficiency as well as other topics to be presented in seminars. It is expected to further promote the development of low-carbon cement and concrete materials in the world and the cooperation among countries, which will contribute to the large-scale application of low-carbon cement concrete and the sustainable development of human society.