水泥含量与防氡涂料对粉煤灰砖氡释放的影响

发布时间：2018-05-21 03:08

本文选题：水泥加入量 + 防氡涂料　；参考：《非金属矿》2017年02期

【摘要】：以氡屏蔽率为主要评判指标,研究水泥加入量对煤渣/粉煤灰砖氡释放的影响;使用自制的防氡涂料研究涂层厚度对煤渣/粉煤灰砖氡释放的影响。结果表明:随着水泥加入量的增加,不同水泥量模块的氡析出浓度先明显增加,水泥加入量35%时,模块析出氡浓度达到最大值,然后呈缓慢下降趋势;随涂覆厚度的增加,防氡效率上升,当涂覆厚度为2.0 mm时,防氡效率为98.96%。机理研究表明:水泥量增加,产生的水化反应产物增多,将填充至水泥石内部的孔隙空洞,增加密实度,降低氡的释放,但水泥中粉煤灰等原料会带来氡的释放;涂层表面是一种连续致密均匀的结构,孔隙率极低,防氡基元材料紧密堆积,形成了层层叠加的致密结构,对氡源起到很好的密闭作用。
[Abstract]:The effect of cement content on radon release from cinder / fly ash brick and the effect of coating thickness on radon release from cinder / fly ash brick were studied by taking radon shielding rate as the main evaluation index. The results show that with the increase of cement content, the radon exhalation concentration of different cement content modules increases obviously at first. When the cement content is 35%, the radon concentration of the module reaches the maximum value and then decreases slowly, and with the increase of the coating thickness, the radon concentration of the module increases with the increase of the coating thickness. When the thickness of coating is 2.0 mm, the efficiency of preventing radon is 98.96. The mechanism study shows that with the increase of cement content, the hydration reaction products will be increased, the porosity of cement stone will be filled, the density will be increased, and the release of radon will be reduced, but the raw materials such as fly ash in cement will bring about the release of radon. The coating surface is a kind of continuous dense and uniform structure with extremely low porosity and tight stacking of radon element materials, which forms a dense structure superimposed layer upon layer, which plays a good role in sealing the radon source.
【作者单位】：西南科技大学材料科学与工程学院;
【基金】：国家自然科学基金(11375164)
【分类号】：TU522.1

【相似文献】