Strength properties and thermal conductivity of concrete with the addition of expanded perlite filled with aerogel

In this study, expanded perlite filled with aerogel is used as a new material as the aggregate in concrete. Graded and non-graded expanded perlite filled with aerogel are added into concrete separately. The natural aggregate is partially replaced by the new material, and both the mechanical strength and the thermal conductivity of the concrete decreased when the new material's content increased. When the aggregate content and the water-cement ratio are the same, the mechanical strength and the thermal conductivity of the non-graded material concrete is larger than for the graded material. The water-cement ratios of 0.5 and 0.7 are applied to explore the influence of the water-cement ratio on the properties of the new concrete material. The role of aerogel in complexes is analysed, and the results show that the concrete with a 100% volume content of graded expanded perlite filled with aerogel has a thermal conductivity of 0.098 W/(m K) and compressive strength of 3.71 MPa.