A nondestructive method for measuring the fractal dimension of foam concrete surface
The surface fractal dimension of foam concrete is an important parameter that determines the mechanical and ther-mal properties of foam concrete.In this study,the relationship between the fractal dimension of foam concrete and the thermal conductivity was established,and this relationship was verified by the measured values of thermal conductivity in different litera-tures.Using this relationship,the thermal conductivity of foam concrete with different water binder ratio was measured,and then the fractal dimension was calculated.It was found that the fractal dimension of foam concrete was basically between 2.70～2.85,and in-creased first and then decreased with the increase of water binder ratio.The test results were basically consistent with the data obtained by box counting method.Compared with other methods,the method of measuring the fractal dimension of foam concrete surface by thermal conductivity method is simple and easy to operate,does not need to slice and sample the concrete,and will not cause damage to the concrete structure.
万方数据
维普
