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A platform for research: civil engineering, architecture and urbanism
Superfine iron tailing mud-based goaf filling material and preparation method thereof
The invention discloses a superfine iron tailing mud-based goaf filling material. The filler comprises the following raw materials in percentage by mass: 50-70% of superfine tail mud; 13%-25% of coarse aggregate; 11%-15% of ordinary Portland cement; 3%-7% of phosphogypsum and 3%-7% of fly ash; the water reducing agent accounts for 1%-2% of the cementing material; the early strength agent accounts for 0.5% of the cementing material; and the mass concentration is between 65% and 71%. According to the characteristics of the superfine tail mud, Portland cement, phosphogypsum and fly ash are selected as cementing materials, a large number of pore structures can be formed among ettringite generated by cement hydration reaction, and the superfine tail mud has low granularity and can be used as fine aggregate to be uniformly filled in gaps of ettringite formed by cement hydration and gaps of coarse aggregate; and finally, the superfine tail mud is combined with a hydration reaction product of cement, phosphogypsum and fly ash and coarse aggregate to form a stable and compact structure, so that the compressive strength is improved.
本发明公开了一种超细铁尾矿尾泥基采空区充填料。填料包括如下质量百分数原料：超细尾泥50％～70％；粗骨料13％～25％；普通硅酸盐水泥11％～15％；磷石膏3％～7％，粉煤灰3％～7％；减水剂为胶凝材料的1％～2％；早强剂为胶凝材料的0.5％；质量浓度在65％～71％之间。本发明针对超细尾泥的特点，选用硅酸盐水泥、磷石膏、粉煤灰作为胶凝材料，水泥水化反应生成的钙矾石间会形成大量孔隙结构，超细尾泥具有较低的粒度，作为细骨料可以均匀地填充在水泥水化形成的钙矾石间隙及粗骨料间隙中，最终超细尾泥与水泥、磷石膏、粉煤灰的水化反应产物和粗骨料结合形成稳定致密的结构，提高抗压强度。
Superfine iron tailing mud-based goaf filling material and preparation method thereof
The invention discloses a superfine iron tailing mud-based goaf filling material. The filler comprises the following raw materials in percentage by mass: 50-70% of superfine tail mud; 13%-25% of coarse aggregate; 11%-15% of ordinary Portland cement; 3%-7% of phosphogypsum and 3%-7% of fly ash; the water reducing agent accounts for 1%-2% of the cementing material; the early strength agent accounts for 0.5% of the cementing material; and the mass concentration is between 65% and 71%. According to the characteristics of the superfine tail mud, Portland cement, phosphogypsum and fly ash are selected as cementing materials, a large number of pore structures can be formed among ettringite generated by cement hydration reaction, and the superfine tail mud has low granularity and can be used as fine aggregate to be uniformly filled in gaps of ettringite formed by cement hydration and gaps of coarse aggregate; and finally, the superfine tail mud is combined with a hydration reaction product of cement, phosphogypsum and fly ash and coarse aggregate to form a stable and compact structure, so that the compressive strength is improved.
本发明公开了一种超细铁尾矿尾泥基采空区充填料。填料包括如下质量百分数原料：超细尾泥50％～70％；粗骨料13％～25％；普通硅酸盐水泥11％～15％；磷石膏3％～7％，粉煤灰3％～7％；减水剂为胶凝材料的1％～2％；早强剂为胶凝材料的0.5％；质量浓度在65％～71％之间。本发明针对超细尾泥的特点，选用硅酸盐水泥、磷石膏、粉煤灰作为胶凝材料，水泥水化反应生成的钙矾石间会形成大量孔隙结构，超细尾泥具有较低的粒度，作为细骨料可以均匀地填充在水泥水化形成的钙矾石间隙及粗骨料间隙中，最终超细尾泥与水泥、磷石膏、粉煤灰的水化反应产物和粗骨料结合形成稳定致密的结构，提高抗压强度。
Superfine iron tailing mud-based goaf filling material and preparation method thereof
一种超细铁尾矿尾泥基采空区充填料及其制备方法
ZUO XIAOCHAO (author) / ZHANG KANGHUI (author) / LI XU (author) / LIU BIN (author) / YANG HUAMING (author) / LI QUAN (author) / ZHOU FULIN (author)
2023-01-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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