Twenty groups of concrete samples in Meizhou were selected to test the radionuclide limit level,and the results show that the internal irradiation index(IRa)ranged from 0.13～0.70,and the external irradiation index(Ir)ranged from 0.21～1.13,of which the irradiation index(IRa)met≤1.0,but the external irradiation index(Ir)was>1.0 in 2 groups.The radionuclide limit level of concrete is beyond the scope of use,which can be controlled by changing the production formula or changing the source of raw materials.This test used sand and stone with rela-tively low radionuclide limit to replace 30%or 50%of the sand and stone with higher radionuclide limit.The radio-nuclide limit meets the requirements of the internal irradiation index(IRa)≤1.0 and the external irradiation in-dex(Ir)≤1.0 after the reconfiguration of the same mix ratio.
关键词
混凝土/建筑环境/放射性核素限量/配合比
Key words
Concrete/Building environment/Radionuclide limits/Mix ratio
维普
万方数据