Abstract: In order to improve the recycling efficiency of ceramics, ceramic particles and ceramic powder were reused as aggregates and admixtures for ceramic-recycled concrete. By using test method of the orthogonal design and taking ceramic powder, ceramic particles, recycled fine aggregate, fly ash and silica fume as five factors, and setting further four levels for each factor, sixteen groups of mix proportion schemes are designed in this paper. Tests of compression and thermal conductivity are carried out respectively. The physical and mechanical parameters such as strength and thermal conductivity of the ceramic-recycled concrete are obtained therefore, and the optimal mix ratio is found as a result. The test results show that the best mix ratio is as follows: the mass fraction of ceramic powder is 10%, the mass fraction of ceramic particles is 20%, the mass fraction of recycled fine aggregate is 40%, the mass fraction of fly ash is 15%, and the mass fraction of silica fume is 5%.

Key words: ceramic recycled concrete, orthogonal experimental design, mix proportion, thermal conductivity