地聚物对塑性混凝土早期强度和细观结构的影响  

Influence of geopolymer on the early strength and microstructure of plastic concrete

作　　者：王广卫[1] WANG Guangwei(Shandong Normal University,Jinan 250014,China)

机构地区：[1]山东师范大学,山东济南250014

出　　处：《混凝土》2023年第7期122-125,共4页Concrete

摘　　要：以偏高岭土作为地聚物,在塑性混凝土制备过程中加入不同掺量的偏高岭土。然后研究了不同偏高岭土掺量下混凝土的早期(3、7 d)抗压强度和劈裂抗拉强度,并采用扫描电子显微镜(SEM)来研究不同偏高岭土掺量下混凝土在3、7 d养护龄期下水化产物的形貌。早期强度结果表明,随着偏高岭土掺量的增加,制备出的塑性混凝土早期的抗压强度和劈裂抗拉强度呈现先升高后降低的趋势,最佳的偏高岭土掺量为水泥总质量的10%。SEM结果表明适量的偏高岭土掺量可以增加早期水化产物之间的密实性,进而导致塑性混凝土早期强度是升高。总的来说,以上结果为地聚物在塑性混凝土中的应用提供一定的试验基础与数据支撑。Metakaolin is used as the geopolymer,and different amounts of metakaolin were added during the preparation of plastic concrete.Then,the early age(3 d and 7 d)compressive strength and splitting tensile strength of concrete with different amounts of metakaolin were studied in detail,and Scanning Electron Microscope(SEM)was used to study the morphologies of hydration products under different amounts of metakaolin at 3 d and 7 d curing age.Early strength results showed that with the increase of thecontent of metakaolin,the early compressive strength and splitting tensile strength of the prepared plastic concrete showed a trend of first increasing and then decreasing.The best content of metakaolin is the 10%of total mass of cement.SEM results showed that the appropriate amount of metakaolin could increase the compactness between the early hydration products,which in turn leads to an increase in the early strength of plastic concrete.In general,the above results provide a certain experimental basis and data support for the application of geopolymers in plastic concrete.

关 键 词：偏高岭土 地聚物 塑性混凝土 早期强度 密实性 

分 类 号：TU528.041[建筑科学—建筑技术科学]