The Experimental Research And Numerical Simulation Of Foam Concrete Water Absorption And Cooling Performance

Foam concrete (also known as the bubble concrete, referred to as FC) is evolved from the thinking, that as early as 1975 in the United States Aldrish and Mitchell made the air directly into the cement, so as to reduce the density of the cement slurry [26]. In 1978, Yamada S in the United States successfully tests to produce foam cement for oil spring work, for the first time in 1979 in its application of the well.At present, due to its good light, thermal insulation performance, foam concrete promotes very fast in China and widely used in roofing, non-load-bearing walls, pipes of the heat insulation layer and so on.On the other hand, in the methods for addressing the urban heat island effect and roof-high-temperature in the summer, the green roof and water-bearing sand have a better cooling effect, but there are some shortcomings such as expensive, inconvenient maintenance and so on, which restricts their promotion into the project. With cheap and easy to maintain the advantage, both in the previous study and the feasibility of the experimental analysis in this study, FC has also been reflected in its cooling performance with good potential.In this paper, for such a feature of FC, the relationship of the water absorption and cooling performance shall be found, by the way of the cooling performance of experimental research with different water-absorbing abilities, to feed different needs for FC in the projects, and to provide a reference to the proposal. The coupled heat and water transport course in FC of the experiments in the research shall be simulated by the porous medium coupled heat and mass transfer model, so the correctness of the results will be verified in theory. In the simulation, as some FC parameters inconvenient to get, many times using the simplex methods mean taking similar fitting in a certain assumption, and the results are compared with the actual comparison of experimental data, to verify the accuracy of this method and the results. But before that in this article, the relationship between the porosity and water absorption capability of FC is studied through the experimental method in advance, so that it lays a good foundation to study the water-absorption and cooling capability by a very good control of water-absorption.In the verification of the correctness of the numerical model, taking into account the reality of the roof not only constituted by a layer of FC, in order to make the results of research projects closer to reality, in this paper the situation with the cushion underside the roof is also discussed.In order to facilitate the cooling process simulation applications in real engineering project, in the final of this study, a simple interface is designed especially for the procedure, and a summary of the experimental data is used to introduce its using process. A simple engineering need has been reached preliminarily.