放射性“自吸收”水泥基功能复合材料的研究

Studies on self-absorption of radioactivity cement-based functional composites

主要针对建材中粉煤灰的放射性过量问题,通过加入对氡和射线具有吸附和屏蔽作用的功能基元材料制备放射性“自吸收”水泥基功能复合材料,同时通过超细化技术,提高功能基元材料的活性,从而进一步增强材料对放射性的吸收和屏蔽作用。得到了氡释放率比普通粉煤灰水泥砂浆低64.8%、γ射线的发射率减小45%的生态型放射性“自吸收”水泥基功能复合材料,最后对放射性“自吸收”机理作了一定的探讨。

In allusion to the excessive of radioactivity in fly ash,author successful prepared a kind of self-absorption of radioactivity cement-based functional composites. The radioactivity, which release from fly ash, can be self-absorbed within functional composites by joined functional element materials that can absorb and screen radioactivity. At the same time, the integral technology of micro-pulverized ＆ modified improves the activity of functional element materials, and farther more enhances the ability to absorb and screen radioactivity of cementbased functional composites. Some conclusions have been obtained after being systemic studied. The main conclusions are as follows. Compared with cement based functional composite,the release ratio of radon is reduced by 64.8 % in self-absorption of radioactivity cement-based functional composites and the screen ratio of γ ray is 45%. In the final, the mechanism of self-absorption of radioactivity is discussed in the paper by analyzing microstructure and phase analysis of self-absorption of radioactivity cement-based functional composites.