A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Pumpable coal mine goaf backfilling material
The invention provides a pumpable coal mine goaf backfilling material which comprises the following raw materials in percentage by mass: 10-15% of cement, 10-20% of fly ash, 65-80% of coal gangue powder, 1-1.5% of water reducing agent, 0.5-1% of plastic stabilizer and 0.1-0.5% of retarder (the water reducing agent, plastic stabilizer and retarder are mass percents in cement). The water-solid ratio of the pumpable coal mine goaf backfilling material is 0.65-0.8. The invention also provides a method for preparing the pumpable coal mine goaf backfilling material, which comprises the following steps: proportionally weighing and uniformly mixing the cement, fly ash and coal gangue powder according to the formula, adding a certain amount of water in which the water reducing agent, plastic stabilizer and retarder are dissolved, and stirring to prepare the uniform slurry, thereby obtaining the pumpable coal mine goaf backfilling material.
Pumpable coal mine goaf backfilling material
The invention provides a pumpable coal mine goaf backfilling material which comprises the following raw materials in percentage by mass: 10-15% of cement, 10-20% of fly ash, 65-80% of coal gangue powder, 1-1.5% of water reducing agent, 0.5-1% of plastic stabilizer and 0.1-0.5% of retarder (the water reducing agent, plastic stabilizer and retarder are mass percents in cement). The water-solid ratio of the pumpable coal mine goaf backfilling material is 0.65-0.8. The invention also provides a method for preparing the pumpable coal mine goaf backfilling material, which comprises the following steps: proportionally weighing and uniformly mixing the cement, fly ash and coal gangue powder according to the formula, adding a certain amount of water in which the water reducing agent, plastic stabilizer and retarder are dissolved, and stirring to prepare the uniform slurry, thereby obtaining the pumpable coal mine goaf backfilling material.
Pumpable coal mine goaf backfilling material
LIU ZHIHUA (author) / LI YUANFENG (author)
2015-04-29
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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