氧化石墨烯调控水泥基材料形成大规模规整结构及其性能表征

将制备的GO与减水剂和拌合水超声处理后用于制备水泥基复合材料,研究结果表明,GO纳米片层在水泥基体中达到了均匀分散,水泥水化产物成为了规整形状的多面体状水化晶体,通过其交织交联形成了大规模规整致密的微观结构。当GO掺量为0.03%时,尺寸为30~190nm GO的水泥基复合材料28d时的抗压强度和抗折强度比对照样品分别提高了78.8%和112.7%,尺寸为110~410nm GO的水泥基复合材料的抗压强度和抗折强度分别提高了72.3%和93.9%,水泥基复合材料的耐久性显著提高。同时提出了水泥基复合材料微观结构形成机理。

Graphene Oxide Controlled Cement Materials Formation of Large-scale Ordered Structure and Its Properties Characterization

The cement composites was prepared by ultrasonic processing of prepared graphene oxide (GO) and polycarboxylate superplasticizer (PCs) in mixing water .The research results indicate that GO has been evenly dispersed in cement matrix and the cement hydration products became uniform polyhedron-shaped crystals and formed large-scale ordered and compact microstructure within the bulk cement .A 0.03％ GO with size range of 30—190 nm resulted in compressive and flexural strengths increase rate of 78.8％ and 112.7％ ,compared with the control sample .In constrast to GO with size range of 110—410 nm ,the corresponding increase rate was 72.3％ and 93.9％ ,respectively .Their durability has significantly improved compared to the control sample . Meanwhile ,the forming mechanism of ordered crystals and structure was proposed .