Natt Makul is an associate professor at Phranakhon Rajabhat University. He received his Ph.D. in Civil Engineering from Thammasat University. His research interests include the microwave heating of cement-based materials, the utilization of waste materials as concrete materials, such as fly ash, rice husk ash, limestone powder, steel powder, foundry sand, and dry powder sludge ash, the behaviors of Portland cement-based materials, the microstructural characteristics of concrete, and the special testing and analysis of concrete structures.