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A platform for research: civil engineering, architecture and urbanism
Preparation method of harmless semi-hydrated phosphogypsum road base stabilizing material
The invention provides a preparation method of a harmless semi-hydrated phosphogypsum roadbase stabilizing material, which comprises the following steps: by taking semi-hydrated phosphogypsum produced by a semi-hydrated wet-process phosphoric acid process as a raw material, carrying out primary modification on the semi-hydrated phosphogypsum by adopting limestone powder or high-calcium fly ash, carrying out primary aging, and then carrying out secondary modification on the semi-hydrated phosphogypsum by adopting quick lime, thereby obtaining the harmless semi-hydrated phosphogypsum roadbase stabilizing material. The semi-hydrated ardealite subjected to secondary aging can be used as a road base stabilizing material, and the harmless semi-hydrated ardealite road base stabilizing material is formed after forced stirring, compaction and maintenance for the first time. Harmless treatment of the semi-hydrated phosphogypsum is achieved through two times of modification and two times of aging, various properties of the prepared stabilizing material meet the requirements of most roadbase application scenes, and it is guaranteed that harmful ingredients in a leaching solution of the semi-hydrated phosphogypsum stabilizing material under rain wash do not exceed relevant environmental protection standard requirements in the roadbase application process; no pollution is caused to the environment.
本发明提供一种无害化半水磷石膏道路基层稳定材料的制备方法，该方法以半水湿法磷酸工艺产生的半水磷石膏为原料，采用石灰石粉或高钙粉煤灰对半水磷石膏进行一次改性，经一次陈化后再采用生石灰对半水磷石膏进行二次改性，经二次陈化后的半水磷石膏可用作道路基层稳定材料，一次通过强制搅拌、压实、养护后形成无害化半水磷石膏道路基层稳定材料。本发明通过两次改性和两次陈化实现对半水磷石膏的无害化，所制稳定材料各项性能满足大多数道路基层应用场景的需求，保障在道路基层使用中半水磷石膏稳定材料在雨水冲刷下的浸出液有害成分不超过相关环保标准要求，对环境无污染。
Preparation method of harmless semi-hydrated phosphogypsum road base stabilizing material
The invention provides a preparation method of a harmless semi-hydrated phosphogypsum roadbase stabilizing material, which comprises the following steps: by taking semi-hydrated phosphogypsum produced by a semi-hydrated wet-process phosphoric acid process as a raw material, carrying out primary modification on the semi-hydrated phosphogypsum by adopting limestone powder or high-calcium fly ash, carrying out primary aging, and then carrying out secondary modification on the semi-hydrated phosphogypsum by adopting quick lime, thereby obtaining the harmless semi-hydrated phosphogypsum roadbase stabilizing material. The semi-hydrated ardealite subjected to secondary aging can be used as a road base stabilizing material, and the harmless semi-hydrated ardealite road base stabilizing material is formed after forced stirring, compaction and maintenance for the first time. Harmless treatment of the semi-hydrated phosphogypsum is achieved through two times of modification and two times of aging, various properties of the prepared stabilizing material meet the requirements of most roadbase application scenes, and it is guaranteed that harmful ingredients in a leaching solution of the semi-hydrated phosphogypsum stabilizing material under rain wash do not exceed relevant environmental protection standard requirements in the roadbase application process; no pollution is caused to the environment.
本发明提供一种无害化半水磷石膏道路基层稳定材料的制备方法，该方法以半水湿法磷酸工艺产生的半水磷石膏为原料，采用石灰石粉或高钙粉煤灰对半水磷石膏进行一次改性，经一次陈化后再采用生石灰对半水磷石膏进行二次改性，经二次陈化后的半水磷石膏可用作道路基层稳定材料，一次通过强制搅拌、压实、养护后形成无害化半水磷石膏道路基层稳定材料。本发明通过两次改性和两次陈化实现对半水磷石膏的无害化，所制稳定材料各项性能满足大多数道路基层应用场景的需求，保障在道路基层使用中半水磷石膏稳定材料在雨水冲刷下的浸出液有害成分不超过相关环保标准要求，对环境无污染。
Preparation method of harmless semi-hydrated phosphogypsum road base stabilizing material
一种无害化半水磷石膏道路基层稳定材料的制备方法
2023-11-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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