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Concrete capable of inhibiting and repairing saltpetering of prefabricated duct piece and preparation method of concrete
The invention provides concrete capable of inhibiting and repairing efflorescence of a prefabricated segment and a preparation method of the concrete. The concrete is prepared from the following raw materials in parts by weight: 180 to 240 parts of cement, 30 to 48 parts of silica fume, 150 to 210 parts of blast furnace slag powder, 80 to 120 parts of water, 54 to 80 parts of quartz sand, 32 to 50 parts of limestone powder, 54 to 80 parts of river sand, 5.2 to 8.4 parts of polyethylene fiber and 0.5 to 1 part of polycarboxylate superplasticizer. The method comprises the following steps: weighing raw materials required by the concrete according to required parts by weight, firstly adding the weighed cement, silica fume, blast furnace slag powder, quartz sand and limestone powder into a stirrer, and carrying out dry stirring for 1 minute to obtain a powder mixture; adding the weighed river sand and polycarboxylic acid water reducer into the stirrer, and continuously performing dry stirring for 1 minute; and uniformly adding water and polyethylene fibers into the stirrer to obtain the concrete capable of inhibiting and repairing the saltpetering of the prefabricated pipe piece. According to the invention, the ductility and workability of the cement mortar can be synchronously improved, and the defect of insufficient fluidity of ultra-high performance concrete is overcome.
本发明提供了一种能够抑制并修复预制管片泛碱的混凝土及其制备方法。按重量份计，混凝土的原料由以下组分构成：水泥180～240份、硅灰30～48份、高炉矿渣粉150～210份、水80～120份、石英砂54～80份、石灰石粉32～50份、河砂54～80份、聚乙烯纤维5.2～8.4份和聚羧酸减水剂0.5～1份。该方法包括：按所需重量份数称取混凝土所需的原料，将称取的水泥、硅灰、高炉矿渣粉、石英砂和石灰石粉先加入到搅拌机内干搅1分钟，得到粉体混合物；将称取的河砂和聚羧酸减水剂加入到搅拌机内，继续干搅1分钟；在搅拌机中均匀加入水和聚乙烯纤维，得到能够抑制并修复预制管片泛碱的混凝土。本发明可以实现水泥砂浆延性和工作性的同步提升，克服了超高性能混凝土的流动性不足的短板。
Concrete capable of inhibiting and repairing saltpetering of prefabricated duct piece and preparation method of concrete
The invention provides concrete capable of inhibiting and repairing efflorescence of a prefabricated segment and a preparation method of the concrete. The concrete is prepared from the following raw materials in parts by weight: 180 to 240 parts of cement, 30 to 48 parts of silica fume, 150 to 210 parts of blast furnace slag powder, 80 to 120 parts of water, 54 to 80 parts of quartz sand, 32 to 50 parts of limestone powder, 54 to 80 parts of river sand, 5.2 to 8.4 parts of polyethylene fiber and 0.5 to 1 part of polycarboxylate superplasticizer. The method comprises the following steps: weighing raw materials required by the concrete according to required parts by weight, firstly adding the weighed cement, silica fume, blast furnace slag powder, quartz sand and limestone powder into a stirrer, and carrying out dry stirring for 1 minute to obtain a powder mixture; adding the weighed river sand and polycarboxylic acid water reducer into the stirrer, and continuously performing dry stirring for 1 minute; and uniformly adding water and polyethylene fibers into the stirrer to obtain the concrete capable of inhibiting and repairing the saltpetering of the prefabricated pipe piece. According to the invention, the ductility and workability of the cement mortar can be synchronously improved, and the defect of insufficient fluidity of ultra-high performance concrete is overcome.
本发明提供了一种能够抑制并修复预制管片泛碱的混凝土及其制备方法。按重量份计，混凝土的原料由以下组分构成：水泥180～240份、硅灰30～48份、高炉矿渣粉150～210份、水80～120份、石英砂54～80份、石灰石粉32～50份、河砂54～80份、聚乙烯纤维5.2～8.4份和聚羧酸减水剂0.5～1份。该方法包括：按所需重量份数称取混凝土所需的原料，将称取的水泥、硅灰、高炉矿渣粉、石英砂和石灰石粉先加入到搅拌机内干搅1分钟，得到粉体混合物；将称取的河砂和聚羧酸减水剂加入到搅拌机内，继续干搅1分钟；在搅拌机中均匀加入水和聚乙烯纤维，得到能够抑制并修复预制管片泛碱的混凝土。本发明可以实现水泥砂浆延性和工作性的同步提升，克服了超高性能混凝土的流动性不足的短板。
Concrete capable of inhibiting and repairing saltpetering of prefabricated duct piece and preparation method of concrete
一种能够抑制并修复预制管片泛碱的混凝土及其制备方法
DING HONG (author) / PENG GAIFEI (author) / WANG XIAOFAN (author) / HE HAIQIANG (author) / WANG LINLIN (author) / FU YUDONG (author) / MI YINGHUA (author) / ZHANG ZHENXING (author) / WANG HAIDI (author) / LU MINGXIAO (author)
2024-06-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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