Ultra high performance concrete using waste materials for high-rise buildings

Ultra High Performance Concrete (UHPC) is usually considered to be over 150 MPa in compressive strength and over 20 MPa for flexural strength. Therefore, UHPC offers considerable potential in forward-thinking designs for thinner/larger post-tensioned slabs and smaller/longer columns in the construction of high-rise buildings. This paper presents a number of experimental results on the mechanical properties of UHPC using different types of waste material, including fly ash, ground granulated blast furnace slag, and rice husk ash. The results show the potential of using these waste materials to produce UHPC, especially in developing countries such as Vietnam where the limited availability and high cost of silica fume constrains its application in the high strength concrete industry. This therefore also has potential for contributing to the sustainable development and economic prosperity of the concrete industry and wider construction sector in Vietnam and other developing countries.