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A platform for research: civil engineering, architecture and urbanism
Controllable low-strength backfill material
The invention discloses a controllable low-strength backfill material which comprises cement, blast furnace slag, fine sand and iron tailings according to the mass part ratio of (9-11): (9-11): (30-40): (40-50), NaOH is added into the backfill material to serve as a cement exciting agent, and the content of the NaOH is 0.5% of the mass of a gel material. The particle size of the iron tailings is smaller than or equal to 1 mm, the mass ratio of the blast furnace slag to the solid is 5%-12%, the mass ratio of the fine sand to the solid is 30%-40%, the water-solid ratio is 0.35, the mass ratio of the blast furnace slag to the solid is 5%-12%, and the unconfined compressive strength of the backfill material is 5-8 MPa; the mass of the fine sand accounts for 30%-40% of the mass of the solid, the water-solid ratio is 0.35, and the slump expansion degree of the backfill material is 200 m-250 mm; when the particle size of the iron tailings is smaller than 1 mm, the heavy metal reaches the standard of Identification Standard for Hazardous Waste Identification for Extraction Toxicity (GB5085.3-2007).
本申请公开了一种可控性低强度回填材料，该回填材料包含水泥、高炉矿渣、细沙、铁尾矿，按照质量份数配比9‑11:9‑11:30‑40:40‑50，回填材料添加NaOH为水泥激发剂，含量为凝胶材料质量的0.5％。铁尾矿粒径≤1mm，高炉矿渣占固体质量比在5％～12％，细沙占固体质量比例在30％～40％之间，水固比＝0.35，其中高炉矿渣占固体质量在5％～12％，回填材料无侧限抗压强度在5MPa～8MPa；细沙占固体质量在30％～40％，且水固比＝0.35，回填材料坍落拓展度在200m～250mm；铁尾矿粒径＜1mm时，重金属达到《危险废物鉴别标准浸出毒性鉴别》标准(GB5085.3‑2007)。
Controllable low-strength backfill material
The invention discloses a controllable low-strength backfill material which comprises cement, blast furnace slag, fine sand and iron tailings according to the mass part ratio of (9-11): (9-11): (30-40): (40-50), NaOH is added into the backfill material to serve as a cement exciting agent, and the content of the NaOH is 0.5% of the mass of a gel material. The particle size of the iron tailings is smaller than or equal to 1 mm, the mass ratio of the blast furnace slag to the solid is 5%-12%, the mass ratio of the fine sand to the solid is 30%-40%, the water-solid ratio is 0.35, the mass ratio of the blast furnace slag to the solid is 5%-12%, and the unconfined compressive strength of the backfill material is 5-8 MPa; the mass of the fine sand accounts for 30%-40% of the mass of the solid, the water-solid ratio is 0.35, and the slump expansion degree of the backfill material is 200 m-250 mm; when the particle size of the iron tailings is smaller than 1 mm, the heavy metal reaches the standard of Identification Standard for Hazardous Waste Identification for Extraction Toxicity (GB5085.3-2007).
本申请公开了一种可控性低强度回填材料，该回填材料包含水泥、高炉矿渣、细沙、铁尾矿，按照质量份数配比9‑11:9‑11:30‑40:40‑50，回填材料添加NaOH为水泥激发剂，含量为凝胶材料质量的0.5％。铁尾矿粒径≤1mm，高炉矿渣占固体质量比在5％～12％，细沙占固体质量比例在30％～40％之间，水固比＝0.35，其中高炉矿渣占固体质量在5％～12％，回填材料无侧限抗压强度在5MPa～8MPa；细沙占固体质量在30％～40％，且水固比＝0.35，回填材料坍落拓展度在200m～250mm；铁尾矿粒径＜1mm时，重金属达到《危险废物鉴别标准浸出毒性鉴别》标准(GB5085.3‑2007)。
Controllable low-strength backfill material
一种可控性低强度回填材料
WANG FEI (author) / CHEN RUIXIN (author)
2023-06-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
BACKFILL MATERIAL, BACKFILL METHOD, AND BACKFILL MATERIAL MANUFACTURING METHOD
| European Patent Office | 2020