The Experiment Research Of The Non-autoclaved Fly-ash Light Wall Material

With the implement of the laws of the saving-energy on the national construction, the building materials play an extraordinary important role in the process of carrying out this plan. In regard to the wall materials, the present autoclaved fly-ash aerated concrete is a noticeable one because of its outstanding merits such as light weight, using waste, heat preservation and saving energy. But the present autoclaved fly-ash aerated concrete can preserve heat only by micropore in its body, and the effect of this kind of wall material is often bad; in order to decrease its weight and to strengthen the performance of heat preservation, its micropore percentage will be increased, while its intensity will be weaken. On the other hand, the present autoclaved fly-ash aerated concrete was produced in the condition of autoclaved. The process is complex and it will use a lot of energy. These are the checks in its applying. In order to achieve the target of the future wall material, it is necessary to research and manufacture a new type non-autoclaved light quality wall material.In this paper, the effects of fly ash, cement, lime, gesso, inflated pearlite, w/c ratio and additional agent on non-autoclaved fly ash light quality wall material were studied by experiments in the technology of non-autoclaved conditions. It concluded that the inflated pearlite and fly ash are main factors that affect the property of non-autoclaved fly ash light quality wall material by orthogonal experiment results. And the amount of inflated pearlite affect observably the 28th intensity of pressure of non-autoclaved fly ash light quality wall material, the amount of fly ash affect mainly it and the amount of lime and gesso have a little effect on it. At last, the best combination ratio which equal to fly ash aerated concrete block whose density varies from 451kg/m~3 to 550kg/m~3 of non-autoclaved fly ash light quality wall material is fly ash account for 55%, lime account for 16%, inflated pearlite account for 6%, gesso account for 4%, cement account for 19%, which was obtained by experiment.