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Method for improving compressive strength of semi-hydrated ardealite cementing material, semi-hydrated ardealite cementing material and preparation method of semi-hydrated ardealite cementing material
The invention discloses a method for improving the compressive strength of a semi-hydrated phosphogypsum cementing material. The phosphogypsum cementing material is cured by adopting a solution containing sulfate ions after being formed so as to improve the compressive strength; a solution containing sulfate ions is used as a curing agent of the semi-hydrated phosphogypsum cementing material, semi-hydrated phosphogypsum which is not completely hydrated is further hydrated in the sulfate ion solution, meanwhile, the content of calcium ions released by hydration of residual calcium oxide and the content of hydroxyl ions are rapidly increased until saturation, and in a saturated alkaline environment, the curing agent can be used for curing the semi-hydrated phosphogypsum cementing material. Aluminum oxide and silicon oxide in the slag which is not hydrated completely are fully separated out and form hydrated calcium silicate and hydrated calcium aluminate with calcium ions, meanwhile, the hydrated calcium aluminate can be further converted into ettringite due to the supplement of the sulfate ion solution, so that an interlaced net structure is formed inside, internal pores are filled with the hydrated calcium silicate, and the pore size is reduced; the porosity of the ardealite-based cementing material is effectively reduced, and the mechanical strength of the large-dosage ardealite cementing material is improved.
本发明公开一种提高半水磷石膏胶凝材料抗压强度的方法，将磷石膏胶凝材料在成型后采用含硫酸根离子溶液养护以提高抗压强度；通过含硫酸根离子溶液作为半水磷石膏胶凝材料的养护剂，在硫酸根离子溶液中，使得未完全水化的半水磷石膏进一步水化，同时残留的氧化钙水化释放出钙离子与氢氧根离子含量迅速攀升直至饱和，在饱和的碱性环境下，未完全水化的矿渣中的氧化铝，氧化硅得以充分析出，与钙离子形成水化硅酸钙和水化铝酸钙，同时由于补充了硫酸根离子溶液可以进一步的将水化铝酸钙转化为钙矾石，使得内部形成互相交织的网状结构，水化硅酸钙填充内部孔隙，有效的降低了磷石膏基胶凝材料的孔隙率，提高大掺量磷石膏胶凝材料的力学强度。
Method for improving compressive strength of semi-hydrated ardealite cementing material, semi-hydrated ardealite cementing material and preparation method of semi-hydrated ardealite cementing material
The invention discloses a method for improving the compressive strength of a semi-hydrated phosphogypsum cementing material. The phosphogypsum cementing material is cured by adopting a solution containing sulfate ions after being formed so as to improve the compressive strength; a solution containing sulfate ions is used as a curing agent of the semi-hydrated phosphogypsum cementing material, semi-hydrated phosphogypsum which is not completely hydrated is further hydrated in the sulfate ion solution, meanwhile, the content of calcium ions released by hydration of residual calcium oxide and the content of hydroxyl ions are rapidly increased until saturation, and in a saturated alkaline environment, the curing agent can be used for curing the semi-hydrated phosphogypsum cementing material. Aluminum oxide and silicon oxide in the slag which is not hydrated completely are fully separated out and form hydrated calcium silicate and hydrated calcium aluminate with calcium ions, meanwhile, the hydrated calcium aluminate can be further converted into ettringite due to the supplement of the sulfate ion solution, so that an interlaced net structure is formed inside, internal pores are filled with the hydrated calcium silicate, and the pore size is reduced; the porosity of the ardealite-based cementing material is effectively reduced, and the mechanical strength of the large-dosage ardealite cementing material is improved.
本发明公开一种提高半水磷石膏胶凝材料抗压强度的方法，将磷石膏胶凝材料在成型后采用含硫酸根离子溶液养护以提高抗压强度；通过含硫酸根离子溶液作为半水磷石膏胶凝材料的养护剂，在硫酸根离子溶液中，使得未完全水化的半水磷石膏进一步水化，同时残留的氧化钙水化释放出钙离子与氢氧根离子含量迅速攀升直至饱和，在饱和的碱性环境下，未完全水化的矿渣中的氧化铝，氧化硅得以充分析出，与钙离子形成水化硅酸钙和水化铝酸钙，同时由于补充了硫酸根离子溶液可以进一步的将水化铝酸钙转化为钙矾石，使得内部形成互相交织的网状结构，水化硅酸钙填充内部孔隙，有效的降低了磷石膏基胶凝材料的孔隙率，提高大掺量磷石膏胶凝材料的力学强度。
Method for improving compressive strength of semi-hydrated ardealite cementing material, semi-hydrated ardealite cementing material and preparation method of semi-hydrated ardealite cementing material
一种提高半水磷石膏胶凝材料抗压强度的方法、半水磷石膏胶凝材料及其制备方法
ZHENZHEN LU (author) / HE LIN (author)
2024-11-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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