纳米材料改性水泥基材料性能研究进展  

Research Progess on the Modification of Cement-based Materials with Nanomaterials

作　　者：吴英哲 衷从浩 张金龙 钟开红 WU Ying-zhe;ZHONG Cong-hao;ZHANG Jin-long;ZHONG Kai-hong(Guangzhou Institute of Building Science Group Co.LTD.,Guangzhou 510440;Guangzhou Construction Co.,Ltd.,Guangzhou 510030)

机构地区：[1]广州市建筑科学研究院集团有限公司,广州510440 [2]广州建筑股份有限公司,广州510030

出　　处：《广州建筑》2024年第4期109-114,共6页GUANGZHOU ARCHITECTURE

基　　金：广东省住房和城乡建设厅科技创新计划项目(2021-K25-284959);广州市建筑集团有限公司科技计划项目(2021-KJ015);广州市建筑科学研究院集团有限公司科技计划项目(2022Y-KJ03)。

摘　　要：随着我国基础设施建设的大规模推进,不断面临各种复杂的工况问题,这要求水泥基材料具备更为优异的工作性能。纳米材料具有尺寸小,表面能高等特点,逐步应用于水泥混凝土中,成为当前的研究热点。纳米材料不仅可以作为成核位点,降低成核能垒,促进水化产物的沉淀生成及水泥早期的水化速度。同时,部分具有火山灰活性的纳米物质可以直接参与到水泥水化反应中,共同促进水泥混凝土的早期强度发展。本文以火山灰活性的纳米材料以及惰性纳米材料两类为出发点,综述了国内外纳米SiO_(2)、CaCO_(3)、纳米C-S-H、氧化石墨烯等纳米材料在混凝土中的应用情况,比较分析了不同纳米材料对于混凝土力学性能、耐久性能的影响效果,并指出各类纳米材料在混凝土中应用过程存在的问题,为各类纳米材料的实际工程应用提供一定的理论指导。With the large-scale promotion of infrastructure construction in our country,we are constantly facing various complex working conditions,which requires cement-based materials to have better working performance.Nanomaterials have the characteristics of small size and high surface energy,and are gradually being applied in cement concrete,becoming a current research hotspot.Nanomaterials can not only serve as nucleation sites,reduce the nucleation energy barrier,promote the precipitation of hydration products and the early hydration rate of cement.Meanwhile,some nanomaterials with volcanic ash activity can directly participate in the cement hydration reaction,jointly promoting the early strength development of cement concrete.This article reviews the application of nano materials such as nano SiO_(2),CaCO_(3),nano C-S-H,and graphene oxide in concrete at home and abroad,starting from two categories of volcanic ash active nano materials and inert nano materials.The impact of different nano materials on the mechanical and durability properties of concrete is compared and analyzed,and the problems in the application process of various nano materialsin concrete are pointed out,Providetheoretical guidance forthe practical engineering applications of various nanomaterials.

关 键 词：纳米材料 成核效应 水泥水化 力学性能 耐久性 

分 类 号：TU-528[建筑科学]