Proportioning Design of Foamed Concrete Mixed with Recycled Micro-powder of Construction Waste

This paper presents a new kind of foamed concrete mixed with recycled micro-powder of construction waste which is helpful for saving resources, protecting the environment and achieving a sustainable development. An orthogonal experiment was designed to test the compressive strength of foamed concrete relatng to different factors, and the degree of influence were studied according to test result and range analysis of the factors. Using the efficacy coefficient method, the best mixture ratio was derived when both requirements of a quite light weight and a high strength were satisfied. XRD and SEM tests showed that the increase in compressive strength was due to the refinement of pores within the foamed concrete by the addition of recycled micronized powder.