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Hydrophobic ultrahigh-toughness cement-based material and preparation method thereof
The invention provides a hydrophobic ultrahigh-toughness cement-based material and a preparation method thereof, and the hydrophobic ultrahigh-toughness cement-based material comprises the following components in parts by weight: 20-40 parts of ordinary Portland cement, 60-80 parts of first-grade fly ash, 18-22 parts of quartz sand, 0.1-0.15 part of a polycarboxylic acid water reducer, 0.6-1.2 parts of nano calcium carbonate, 0.6-2.0 parts of marble powder, 0.4-0.8 part of hydroxyl silicone oil, 1-2 parts of polyvinyl alcohol fiber and 30-40 parts of water. The hydroxyl silicone oil and the PVA fibers are added into the hydrophobic ultrahigh-toughness cement-based material, so that multiple hydrophobic characteristics are formed. In addition, by adding nano calcium carbonate and marble powder, early hydration of the cement can be promoted, and the cement and the powder material form close packing, so that the compressive strength and tensile strength of the material are ensured. The cement-based material disclosed by the invention has stable hydrophobic property, ultrahigh toughness and other mechanical properties, has high interface bonding strength with the existing concrete structure, and is suitable for repairing and reinforcing the concrete structure in the marine environment, so that the ductility and durability of the reinforced structure are remarkably improved.
本发明提供一种疏水超高韧性水泥基材料及其制备方法，按照重量份数计，该水泥基材料包括普通硅酸盐水泥20～40份，一级粉煤灰60～80份，石英砂18～22份，聚羧酸系减水剂0.1～0.15份，纳米碳酸钙0.6～1.2份，大理石石粉0.6～2.0份，羟基硅油0.4～0.8份，聚乙烯醇纤维1～2份，水30～40份。本发明的疏水超高韧性水泥基材料中添加了羟基硅油和PVA纤维以形成多重疏水特性。另外，通过添加纳米碳酸钙和大理石石粉可以促进水泥的早期水化，并与粉体材料形成紧密堆积，从而保证材料的抗压和抗拉强度。本发明的水泥基材料同时具备稳定的疏水特性和超高韧性等力学特性，且其与既有混凝土结构界面粘结强度高，适用于海洋环境中混凝土结构的修复与加固，从而显著提高被加固结构的延性和耐久性。
Hydrophobic ultrahigh-toughness cement-based material and preparation method thereof
The invention provides a hydrophobic ultrahigh-toughness cement-based material and a preparation method thereof, and the hydrophobic ultrahigh-toughness cement-based material comprises the following components in parts by weight: 20-40 parts of ordinary Portland cement, 60-80 parts of first-grade fly ash, 18-22 parts of quartz sand, 0.1-0.15 part of a polycarboxylic acid water reducer, 0.6-1.2 parts of nano calcium carbonate, 0.6-2.0 parts of marble powder, 0.4-0.8 part of hydroxyl silicone oil, 1-2 parts of polyvinyl alcohol fiber and 30-40 parts of water. The hydroxyl silicone oil and the PVA fibers are added into the hydrophobic ultrahigh-toughness cement-based material, so that multiple hydrophobic characteristics are formed. In addition, by adding nano calcium carbonate and marble powder, early hydration of the cement can be promoted, and the cement and the powder material form close packing, so that the compressive strength and tensile strength of the material are ensured. The cement-based material disclosed by the invention has stable hydrophobic property, ultrahigh toughness and other mechanical properties, has high interface bonding strength with the existing concrete structure, and is suitable for repairing and reinforcing the concrete structure in the marine environment, so that the ductility and durability of the reinforced structure are remarkably improved.
本发明提供一种疏水超高韧性水泥基材料及其制备方法，按照重量份数计，该水泥基材料包括普通硅酸盐水泥20～40份，一级粉煤灰60～80份，石英砂18～22份，聚羧酸系减水剂0.1～0.15份，纳米碳酸钙0.6～1.2份，大理石石粉0.6～2.0份，羟基硅油0.4～0.8份，聚乙烯醇纤维1～2份，水30～40份。本发明的疏水超高韧性水泥基材料中添加了羟基硅油和PVA纤维以形成多重疏水特性。另外，通过添加纳米碳酸钙和大理石石粉可以促进水泥的早期水化，并与粉体材料形成紧密堆积，从而保证材料的抗压和抗拉强度。本发明的水泥基材料同时具备稳定的疏水特性和超高韧性等力学特性，且其与既有混凝土结构界面粘结强度高，适用于海洋环境中混凝土结构的修复与加固，从而显著提高被加固结构的延性和耐久性。
Hydrophobic ultrahigh-toughness cement-based material and preparation method thereof
一种疏水超高韧性水泥基材料及其制备方法
ZHANG YIXIN (author) / HOU WEI (author) / YAN GUOWEI (author)
2023-09-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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