A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Goaf backfill concrete and concrete backfill system
The invention provides backfill concrete for a goaf. The backfill concrete is prepared from the following raw material components in parts by weight: 105 to 130 parts of cement, 1800 to 2200 parts of coarse aggregate, 1150 to 1450 parts of fine aggregate, 75 to 115 parts of fly ash, 1.5 to 3 parts of a water reducing agent, 0.02 to 0.05 part of triethanolamine and 85 to 125 parts of water, p042.5 Portland cement is adopted as the cement; the coarse aggregate is broken stones with the fineness modulus of 5.75-9.45 mm, the fine aggregate is sand with the fineness modulus of 1.25-3.25 mm, and the coarse aggregate and the fine aggregate are broken stones and sand with different fineness moduli formed by crushing and screening waste stones mined in a mining area; the granularity of the fly ash is 20-90 [mu] m; the water reducing agent adopts an SM resin water reducing agent; the water is beneficiation water of a mining area. The backfill concrete is used for replacing slag and waste soil and stone to directly backfill a goaf, the strength is better, the slag and the waste soil and stone are prevented from settling, and the backfill effect is better; by means of the backfilling system, concrete preparation and concrete backfilling are integrated, the goaf backfilling efficiency is improved, and time is saved.
本发明提供一种采空区回填混凝土，包括以下重量份的原材料组分：水泥105‑130份、粗骨料1800‑2200份、细骨料1150‑1450份、粉煤灰75‑115份、减水剂1.5‑3份、三乙醇胺0.02‑0.05份、水85‑125份；所述水泥采用P0 42.5硅酸盐水泥；所述粗骨料为细度模数为5.75mm‑9.45mm的碎石，细骨料为细度模数为1.25mm‑3.25mm的砂，粗骨料和细骨料使用采矿区开采的废石经过破碎、筛分后形成不同细度模数的碎石和砂；所述粉煤灰颗粒度为20μm‑90μm；所述减水剂采用SM树脂减水剂；所述水使用采矿区的选矿水。使用本发明的回填混凝土替代直接使用矿渣、废土石进行回填采空区，具有更好的强度，防止矿渣、废土石发生沉降，回填效果更好；通过本发明的回填系统集混凝土制备和混凝土回填为一体，提高了采空区回填的效率，节约了时间。
Goaf backfill concrete and concrete backfill system
The invention provides backfill concrete for a goaf. The backfill concrete is prepared from the following raw material components in parts by weight: 105 to 130 parts of cement, 1800 to 2200 parts of coarse aggregate, 1150 to 1450 parts of fine aggregate, 75 to 115 parts of fly ash, 1.5 to 3 parts of a water reducing agent, 0.02 to 0.05 part of triethanolamine and 85 to 125 parts of water, p042.5 Portland cement is adopted as the cement; the coarse aggregate is broken stones with the fineness modulus of 5.75-9.45 mm, the fine aggregate is sand with the fineness modulus of 1.25-3.25 mm, and the coarse aggregate and the fine aggregate are broken stones and sand with different fineness moduli formed by crushing and screening waste stones mined in a mining area; the granularity of the fly ash is 20-90 [mu] m; the water reducing agent adopts an SM resin water reducing agent; the water is beneficiation water of a mining area. The backfill concrete is used for replacing slag and waste soil and stone to directly backfill a goaf, the strength is better, the slag and the waste soil and stone are prevented from settling, and the backfill effect is better; by means of the backfilling system, concrete preparation and concrete backfilling are integrated, the goaf backfilling efficiency is improved, and time is saved.
本发明提供一种采空区回填混凝土，包括以下重量份的原材料组分：水泥105‑130份、粗骨料1800‑2200份、细骨料1150‑1450份、粉煤灰75‑115份、减水剂1.5‑3份、三乙醇胺0.02‑0.05份、水85‑125份；所述水泥采用P0 42.5硅酸盐水泥；所述粗骨料为细度模数为5.75mm‑9.45mm的碎石，细骨料为细度模数为1.25mm‑3.25mm的砂，粗骨料和细骨料使用采矿区开采的废石经过破碎、筛分后形成不同细度模数的碎石和砂；所述粉煤灰颗粒度为20μm‑90μm；所述减水剂采用SM树脂减水剂；所述水使用采矿区的选矿水。使用本发明的回填混凝土替代直接使用矿渣、废土石进行回填采空区，具有更好的强度，防止矿渣、废土石发生沉降，回填效果更好；通过本发明的回填系统集混凝土制备和混凝土回填为一体，提高了采空区回填的效率，节约了时间。
Goaf backfill concrete and concrete backfill system
一种采空区回填混凝土及混凝土回填系统
YE SHENG (author) / ZENG LEI (author) / LIAO SHIZHEN (author) / ZHENG QIAN (author) / ZHUO GUIZHOU (author) / BAI YUNXIANG (author)
2024-01-19
Patent
Electronic Resource
Chinese
High-strength anti-collapse backfill concrete for goaf and preparation method thereof
| European Patent Office | 2024
Belts place concrete and backfill
Engineering Index Backfile | 1968
| European Patent Office | 2023
Application of waste concrete as backfill material and backfill construction method thereof
| European Patent Office | 2023