Geopolymer cement: the future of construction materials

Portland cement (PC) has an annual global production exceeding 4,000 million tonnes, a staggering 25-fold increase compared to its production in 2000. In response to this growing reliance on PC, a research team led by Ts. Dr. Warid Wazien Ahmad Zailani is pioneering the development of geopolymer cement as a sustainable alternative to traditional cement. This innovative research focuses on creating cement-free "green concrete" to reduce CO2 emissions, which currently account for approximately 5-8% of total global C02 emissions. Of these emissions, 50-60% originate from the calcination of limestone during PC production, with the remainder from burning fossil fuels. Geopolymer technology also addresses the issue of excessive industrial by-products such as fly ash and slag, which are often dumped in landfills across Malaysia. By combining fly ash, slag, and specific chemical precursors, a strong and highly durable binder can be produced. This binder achieves impressive strength of over 50 MPa within just one to three days, significantly faster than the 28 days required for Portland cement.