A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Super-toughness shell-imitated layered structure cement-based composite material and preparation method thereof
The invention relates to a super-toughness shell-imitating layered structure cement-based composite material and a preparation method thereof. Comprising the following steps: (1) constructing a layered cement skeleton with bidirectional pores by adopting a directional ice template method; (2) preparing a PVA hydrogel solution; (3) filling pores of the cement skeleton with the PVA hydrogel solution in a vacuum negative pressure impregnation manner; and (4) obtaining the super-toughness shell-imitating layered structure cement-based composite material by adopting a freezing-unfreezing multi-time freezing and thawing cycle mode. According to the invention, a shell structure is introduced into a multi-layer ordered structure of a cement-hydrogel composite material by using an ice template method, extremely high toughness is obtained while the bending strength of the material is increased, and the purpose of improving the protective performance of the concrete material is achieved by fully utilizing the high strength, impact resistance and structural reliability of a functionally graded material; and the durability of the material is improved by a crack self-repairing technology based on hydration reaction.
本发明为一种超韧性仿贝壳层状结构水泥基复合材料及其制备方法。包括如下步骤：(1)采用定向冰模板法构建具有双向孔隙的层状水泥骨架；(2)配置PVA水凝胶溶液；(3)采用真空负压浸渍的方式将PVA水凝胶溶液填充到水泥骨架的孔隙中；(4)采用“冷冻‑解冻”多次冻融循环的方式得到超韧性仿贝壳层状结构水泥基复合材料。本发明用冰模板法将“贝壳结构”引入水泥‑水凝胶复合材料的多层有序结构中，在材料抗弯强度增加的同时获得极高韧性，充分利用功能梯度材料的高强度、耐冲击性和结构可靠性，来达到提高混凝土材料防护性能的目的，且基于水化反应的裂缝自主修复技术，提高材料的耐久性能。
Super-toughness shell-imitated layered structure cement-based composite material and preparation method thereof
The invention relates to a super-toughness shell-imitating layered structure cement-based composite material and a preparation method thereof. Comprising the following steps: (1) constructing a layered cement skeleton with bidirectional pores by adopting a directional ice template method; (2) preparing a PVA hydrogel solution; (3) filling pores of the cement skeleton with the PVA hydrogel solution in a vacuum negative pressure impregnation manner; and (4) obtaining the super-toughness shell-imitating layered structure cement-based composite material by adopting a freezing-unfreezing multi-time freezing and thawing cycle mode. According to the invention, a shell structure is introduced into a multi-layer ordered structure of a cement-hydrogel composite material by using an ice template method, extremely high toughness is obtained while the bending strength of the material is increased, and the purpose of improving the protective performance of the concrete material is achieved by fully utilizing the high strength, impact resistance and structural reliability of a functionally graded material; and the durability of the material is improved by a crack self-repairing technology based on hydration reaction.
本发明为一种超韧性仿贝壳层状结构水泥基复合材料及其制备方法。包括如下步骤：(1)采用定向冰模板法构建具有双向孔隙的层状水泥骨架；(2)配置PVA水凝胶溶液；(3)采用真空负压浸渍的方式将PVA水凝胶溶液填充到水泥骨架的孔隙中；(4)采用“冷冻‑解冻”多次冻融循环的方式得到超韧性仿贝壳层状结构水泥基复合材料。本发明用冰模板法将“贝壳结构”引入水泥‑水凝胶复合材料的多层有序结构中，在材料抗弯强度增加的同时获得极高韧性，充分利用功能梯度材料的高强度、耐冲击性和结构可靠性，来达到提高混凝土材料防护性能的目的，且基于水化反应的裂缝自主修复技术，提高材料的耐久性能。
Super-toughness shell-imitated layered structure cement-based composite material and preparation method thereof
超韧性仿贝壳层状结构水泥基复合材料及其制备方法
FENG JUN (author) / CHEN BIN (author) / LI WEIBING (author) / SUN XICHEN (author) / YANG YU (author) / GAO YIFEI (author) / NIU ZONGPENG (author)
2023-12-01
Patent
Electronic Resource
Chinese
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