Valorisation of phosphogypsum as building material: radiological aspects

被引：9

作者：

Tayibi, H. ^{[1
]}

Gasco, C. ^{[2
]}

Navarro, N. ^{[2
]}

Lopez-Delgado, A. ^{[1
]}

Alvarez, A. ^{[2
]}

Yaguee, L. ^{[2
]}

Alguacil, F. J. ^{[1
]}

Lopez, F. A. ^{[1
]}

机构：

[1] Ctr Nacl Invest Met CSIC, Madrid, Spain

[2] Ctr Invest Energet Medioambient & Tecnol CIEMAT, Madrid, Spain

来源：

MATERIALES DE CONSTRUCCION | 2011年 / 61卷 / 304期

关键词：

phosphogypsum; natural radioactivity; TENORM; building materials; sulphur concrete; SOUTH;

D O I：

10.3989/mc.2010.58910

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Nowadays, alternative uses of phosphogypsum (PG) in the building industry are being considered in several countries; however, the natural radioactivity level in the PG could be a restriction for those uses. United States Environmental Protection Agency (US-EPA) classified PG as Technologically Enhanced Naturally Occurring Radioactive Material (TENORM). This drawback could be avoided controlling its percentage in the cement preparation and the radionuclides content in the other raw materials used in its production, and calculating the activity concentration index (I) in the final by-products. The valorization of PG as a building material has been studied, from a radiological point of view, by developing a new stabilisation/solidification process. PG is incorporated within a polymeric sulphur matrix, obtaining a concrete-like material, which presents lower natural radioactive content than the initial PG. The 226Ra content of this material ranged between 26-27 Bq.kg(-1) and it is quite similar to that of common Spanish building materials.

引用

页码：503 / 515

页数：13

共 28 条

[1] Radioecological study of an estuarine system located in the south of Spain [J].