The Conference Proceedings will be published with an ISSN and ISBN, indexed in Scopus and Google Scholar, and archived permanently in Portico. The 6th International conference on Structural Engineering and Concrete Technology (ICSECT 2021) aims to become the leading annual conference in fields related to structural engineering and concrete technology. The goal of this civil engineering conference 2021 is to gather scholars from all over the world to present advances in the relevant fields and to foster an environment conducive to exchanging ideas and information. This conference will also provide an ideal environment to develop new collaborations and meet experts on the fundamentals, applications, and products of the mentioned fields. ICSECT 2021 is an acronym for International Conference on Structural Engineering and Concrete Technology. Topics for ICSECT’2021 include, but are not limited, to the following: Buildings Energy Management Building Optimal Design Civil Engineering Composites and Construction Concrete Products and Specifications Construction Materials Green Design Marine Structures Modelling and Simulation New Technologies in Structural Design and Construction Seismic Control Unground Structures