Green Intelligence Environment School, Yangtze Normal University, Chongqing, 408100, China.
Chongqing Environmental Protection Center for Shale Gas Technology & Development, Fuling, Chongqing, 400800, China.
Environ Sci Pollut Res Int. 2019 Oct;26(29):30533-30539. doi: 10.1007/s11356-019-06113-x. Epub 2019 Sep 6.
Phosphogypsum (PG) accumulation occupies huge amounts of land resources and results in serious environmental risks. A new recycling product, the phosphogypsum embedded filler (PGEF) made with calcination-modified phosphogypsum, was developed. The preparation process, hydration mechanism of PG, basic physical performances, environmental safety, engineering application, and cost analysis of the PGEF were studied. The results showed that the stress performance and thermal insulation property of the products were satisfied. Environmental performance tests established their findings that the application of PGEF prepared with calcination-modified PG does not cause any secondary contamination. In addition, the cost of PGEF is far lesser than that of the same volume of reinforced concrete. PGEF prepared with calcination-modified PG has shown a perfect application in cast-in situ concrete hollow floor structure.
磷石膏（PG）堆积占用了大量的土地资源，并导致了严重的环境风险。一种新型的回收产品，即用煅烧改性磷石膏制成的磷石膏嵌入式填料（PGEF）被开发出来。研究了 PGEF 的制备工艺、PG 的水化机理、基本物理性能、环境安全性、工程应用和成本分析。结果表明，产品的应力性能和隔热性能令人满意。环境性能测试证实，使用煅烧改性 PG 制备的 PGEF 不会造成任何二次污染。此外，PGEF 的成本远远低于相同体积的钢筋混凝土。煅烧改性 PG 制备的 PGEF 在现浇混凝土空心楼盖结构中得到了完美的应用。
