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A platform for research: civil engineering, architecture and urbanism
Heat-resistant concrete suitable for high-ground-temperature tunnel secondary lining
The invention relates to heat-resistant concrete suitable for a high-ground-temperature tunnel secondary lining. The heat-resistant concrete comprises the following components in parts by mass: 250-320 parts of low-heat Portland cement, 60-120 parts of a mineral admixture, 950-1150 parts of coarse aggregate, 650-850 parts of machine-made sand, 5-35 parts of micro aggregate, 0-2.0 parts of a hydration heat inhibitor, 3.6-4.4 parts of a high-temperature adaptive water reducing agent, 0-0.04 part of a defoaming agent and 145-160 parts of water, and the air content of a mixture entering a mold is less than or equal to 4%. Compared with the prior art, the product provided by the invention has the technical advantages of small workability loss, low later strength damage and good crack resistance in a high ground temperature environment.
本发明涉及一种适用于高地温隧道二衬的耐热混凝土，所述的耐热混凝土包括以下组分及含量（质量份）为：低热硅酸盐水泥250～320、矿物掺和料60～120、粗骨料950～1150、机制砂650～850、微集料5～35、水化热抑制剂0～2.0、高温适应型减水剂3.6～4.4、消泡剂0～0.04、水145～160，其拌和物入模含气量≤4%。与现有技术相比，本发明产品具有在高地温环境下工作性损失小、后期强度伤损低、抗裂性好的技术优势。
Heat-resistant concrete suitable for high-ground-temperature tunnel secondary lining
The invention relates to heat-resistant concrete suitable for a high-ground-temperature tunnel secondary lining. The heat-resistant concrete comprises the following components in parts by mass: 250-320 parts of low-heat Portland cement, 60-120 parts of a mineral admixture, 950-1150 parts of coarse aggregate, 650-850 parts of machine-made sand, 5-35 parts of micro aggregate, 0-2.0 parts of a hydration heat inhibitor, 3.6-4.4 parts of a high-temperature adaptive water reducing agent, 0-0.04 part of a defoaming agent and 145-160 parts of water, and the air content of a mixture entering a mold is less than or equal to 4%. Compared with the prior art, the product provided by the invention has the technical advantages of small workability loss, low later strength damage and good crack resistance in a high ground temperature environment.
本发明涉及一种适用于高地温隧道二衬的耐热混凝土，所述的耐热混凝土包括以下组分及含量（质量份）为：低热硅酸盐水泥250～320、矿物掺和料60～120、粗骨料950～1150、机制砂650～850、微集料5～35、水化热抑制剂0～2.0、高温适应型减水剂3.6～4.4、消泡剂0～0.04、水145～160，其拌和物入模含气量≤4%。与现有技术相比，本发明产品具有在高地温环境下工作性损失小、后期强度伤损低、抗裂性好的技术优势。
Heat-resistant concrete suitable for high-ground-temperature tunnel secondary lining
一种适用于高地温隧道二衬的耐热混凝土
LI XIANGTAO (author) / ZHOU ZAIXING (author) / GAO LONG (author) / ZHANG HAO (author) / TAN YANBIN (author) / XIE YONGJIANG (author) / SU WANYU (author) / QU YANAN (author) / ZHU CHANGHUA (author) / WANG JIAHE (author)
2023-12-15
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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