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Special sprayed concrete material for tunnel high-ground-temperature dry-hot environment
The invention discloses a special sprayed concrete material for a tunnel high-ground-temperature dry-hot environment. The total amount of cementing materials of concrete is 400-420 kg per cubic meter;the cementing material comprises the components in percentage by weight: 83%-89% of ordinary Portland cement, 10%-15% of sulphoaluminate cement and 1%-2% of nano silicon dioxide. Steel fibers are doped according to the volume ratio of 0.4%-0.6%; a shrinkage reducing agent is doped according to 5% of the weight of the cementing material; a setting accelerator is doped according to 3-5% of the weight of the cementing material when the concrete is prepared; the ratio of glue to bone is 1:4.0-1:4.5; the water-binder ratio is not greater than 0.50. The special sprayed concrete provided by the invention has higher compressive strength and tensile strength than common shotcrete with the same strength grade under the synergistic effect of materials with a certain proportioning ratio. According todifferent dry and hot environment temperatures, the bonding strength is 2-4 times of that of common sprayed concrete, and the rebound rate is only 1/3-1/2 of that of the common sprayed concrete.
本发明公开了一种隧道高地温干热环境专用喷射混凝土材料，混凝土按每立方米计胶凝材料总量为400～420kg；胶凝材料按重量百分比含普通硅酸盐水泥83％～89％，硫铝酸盐水泥10％～15％，纳米二氧化硅1％～2％；钢纤维按照体积比0.4％～0.6％掺加；减缩剂按照胶凝材料重量的5％加入；混凝土配制时速凝剂按胶凝材料重量的3～5％加入；胶骨比1:4.0～1:4.5；水胶比不大于0.50。本发明专用喷射混凝土在一定配量比物料协同作用下，具有比相同强度等级普通喷射混凝土更高的抗压强度和抗拉强度。根据干热环境温度不同，粘结强度达到普通喷射混凝土的2～4倍，回弹率仅为普通喷射混凝土的1/3～1/2。
Special sprayed concrete material for tunnel high-ground-temperature dry-hot environment
The invention discloses a special sprayed concrete material for a tunnel high-ground-temperature dry-hot environment. The total amount of cementing materials of concrete is 400-420 kg per cubic meter;the cementing material comprises the components in percentage by weight: 83%-89% of ordinary Portland cement, 10%-15% of sulphoaluminate cement and 1%-2% of nano silicon dioxide. Steel fibers are doped according to the volume ratio of 0.4%-0.6%; a shrinkage reducing agent is doped according to 5% of the weight of the cementing material; a setting accelerator is doped according to 3-5% of the weight of the cementing material when the concrete is prepared; the ratio of glue to bone is 1:4.0-1:4.5; the water-binder ratio is not greater than 0.50. The special sprayed concrete provided by the invention has higher compressive strength and tensile strength than common shotcrete with the same strength grade under the synergistic effect of materials with a certain proportioning ratio. According todifferent dry and hot environment temperatures, the bonding strength is 2-4 times of that of common sprayed concrete, and the rebound rate is only 1/3-1/2 of that of the common sprayed concrete.
本发明公开了一种隧道高地温干热环境专用喷射混凝土材料，混凝土按每立方米计胶凝材料总量为400～420kg；胶凝材料按重量百分比含普通硅酸盐水泥83％～89％，硫铝酸盐水泥10％～15％，纳米二氧化硅1％～2％；钢纤维按照体积比0.4％～0.6％掺加；减缩剂按照胶凝材料重量的5％加入；混凝土配制时速凝剂按胶凝材料重量的3～5％加入；胶骨比1:4.0～1:4.5；水胶比不大于0.50。本发明专用喷射混凝土在一定配量比物料协同作用下，具有比相同强度等级普通喷射混凝土更高的抗压强度和抗拉强度。根据干热环境温度不同，粘结强度达到普通喷射混凝土的2～4倍，回弹率仅为普通喷射混凝土的1/3～1/2。
Special sprayed concrete material for tunnel high-ground-temperature dry-hot environment
隧道高地温干热环境专用喷射混凝土材料
CUI SHENG'AI (author) / LIU PIN (author) / XU XUEFENG (author) / FU FEI (author) / GUO CHEN (author) / LI GUHUA (author) / LI FUHAI (author)
2020-05-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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