The heat transfer coefficient of new construction – Brick masonry with fly ash blocks

•A new energy-saving structure is put forward.•Heat transfer performance of four specimens was tested.•The change of material coefficient of thermal conductivity was considered.•An actual value calculation method of the heat transfer coefficient was proposed.

This paper presents a study of the heat transfer characteristics of new construction - brick masonry with fly ash blocks. Four forms of wall samples were tested to evaluate their heat transfer performance. Based on the mechanism of the thermal conductivity of clay bricks, RCB (recycled concrete bricks) and fly ash blocks, an actual value calculation method for determining the heat transfer coefficient suitable for engineering design was proposed. By analyzing and comparing the experimental values with the theoretical and actual values of the test samples, the proposed method was proved to be reasonably correct; it used RCB instead of ordinary clay bricks and a composite wall with fly ash blocks showed an enhanced insulation effect. New construction of brick masonry with fly ash blocks not only is good for the environment, but also provides good thermal insulation.