Biomimetic Antifreeze Polymers: A Natural Solution to Freeze-Thaw Damage in Cement and Concrete
Biomimetic Antifreeze Polymers: A Natural Solution to Freeze-Thaw Damage in Cement and Concrete
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DOI：
10.23967/dbmc.2020.176
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发表时间：
2020-09
期刊：
影响因子：
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通讯作者：
Mohammad G. Matar;Shane D. Frazier;W. Srubar
中科院分区：
文献类型：
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作者：
Mohammad G. Matar;Shane D. Frazier;W. Srubar
冰是地球上为数不多的冻结时会膨胀的物质之一。因此，这种相变导致多孔胶凝材料的破坏，这些材料吸收水分并经历冻融循环。受大自然的启发，这项工作的目的是表征仿生防冻聚合物（BAPs），这种聚合物明确地模仿了天然存在于植物、鱼类、昆虫和细菌中的防冻蛋白（AFPs）和防冻糖蛋白（AFGPs）的行为，用作混凝土添加剂。本研究的最终目标是提高普通硅酸盐水泥（OPC）混凝土的冻融耐久性，而不使用传统的引气剂（AEAs）。这项工作将强调最近的研究表明，少量添加的bap（低于0.1%的水泥重量）具有冰再结晶抑制（IRI）活性，可以减轻OPC膏体和混凝土中的冻融损伤，同时携带的空气少于3%。
Ice is one of the few substances on Earth that expands when it freezes. Consequently, this phase change causes damage to porous cementitious materials that absorb water and undergo freezethaw cycling. Inspired by nature, the objective of this work is to characterize biomimetic antifreeze polymers (BAPs) that explicitly mimic the behavior of antifreeze proteins (AFPs) and antifreeze glycoproteins (AFGPs) naturally found in plants, fish, insects, and bacteria for use as a concrete additive. The ultimate goal of this work is to enhance the freeze-thaw durability of ordinary portland cement (OPC) concrete without the use of traditional air entraining agents (AEAs). This work will highlight recent research that has shown that small additions, less than 0.1% by wt. of cement, of BAPs that exhibit ice recrystallization inhibition (IRI) activity can mitigate freeze-thaw damage in OPC paste and concrete while entraining less than 3% air.