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A platform for research: civil engineering, architecture and urbanism
High-ductility concrete precast slab and preparation method thereof
The invention discloses a high-ductility concrete precast slab and a preparation method thereof, and belongs to the technical field of concrete materials. The high-ductility concrete prefabricated slab comprises the following raw materials in parts by weight: 100-120 parts of cement, 6-22 parts of superfine fly ash, 2-10 parts of slag, 15-20 parts of silica fume, 100-150 parts of quartz sand, 3-5 parts of nano silicon dioxide, 2-5 parts of a water reducing agent and 10-15 parts of modified fibers. According to the invention, fibers which are easy to agglomerate are modified, so that the problem that the fibers agglomerate in concrete is avoided, the fluidity of the concrete for preparing the precast slab is kept at about 200mm, the ultimate tensile strength of the concrete precast slab reaches 17.8 MPa, the tensile elongation reaches 9.6%, and the problem that the precast slab is easy to crack and even break in use is reduced.
本发明公开了一种高延性混凝土预制板及其制备方法，属于混凝土材料技术领域。高延性混凝土预制板，包括以下重量份数的原料：水泥100～120份、超细粉煤灰6～22份、矿渣2～10份、硅灰15～20份、石英砂100～150份、纳米二氧化硅3～5份、减水剂2～5份、改性纤维10～15份。本发明对易团聚的纤维进行改性，进而避免了纤维在混凝土中团聚的问题，使制备预制板的混凝土的流动度保持在200mm左右，使混凝土预制板的极限拉伸强度达到17.8MPa、拉伸延伸率达到9.6％，进而减少了预制板在使用中易产生裂缝甚至断裂的问题。
High-ductility concrete precast slab and preparation method thereof
The invention discloses a high-ductility concrete precast slab and a preparation method thereof, and belongs to the technical field of concrete materials. The high-ductility concrete prefabricated slab comprises the following raw materials in parts by weight: 100-120 parts of cement, 6-22 parts of superfine fly ash, 2-10 parts of slag, 15-20 parts of silica fume, 100-150 parts of quartz sand, 3-5 parts of nano silicon dioxide, 2-5 parts of a water reducing agent and 10-15 parts of modified fibers. According to the invention, fibers which are easy to agglomerate are modified, so that the problem that the fibers agglomerate in concrete is avoided, the fluidity of the concrete for preparing the precast slab is kept at about 200mm, the ultimate tensile strength of the concrete precast slab reaches 17.8 MPa, the tensile elongation reaches 9.6%, and the problem that the precast slab is easy to crack and even break in use is reduced.
本发明公开了一种高延性混凝土预制板及其制备方法，属于混凝土材料技术领域。高延性混凝土预制板，包括以下重量份数的原料：水泥100～120份、超细粉煤灰6～22份、矿渣2～10份、硅灰15～20份、石英砂100～150份、纳米二氧化硅3～5份、减水剂2～5份、改性纤维10～15份。本发明对易团聚的纤维进行改性，进而避免了纤维在混凝土中团聚的问题，使制备预制板的混凝土的流动度保持在200mm左右，使混凝土预制板的极限拉伸强度达到17.8MPa、拉伸延伸率达到9.6％，进而减少了预制板在使用中易产生裂缝甚至断裂的问题。
High-ductility concrete precast slab and preparation method thereof
一种高延性混凝土预制板及其制备方法
ZHANG GUANGHUA (author)
2022-11-18
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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