活性氧化镁对地质聚合物反应过程的影响。
Effects of Reactive MgO on the Reaction Process of Geopolymer.
作者信息
Li Zhaoheng, Zhang Wei, Wang Ruilan, Chen Fangzhu, Jia Xichun, Cong Peitong
机构信息
College of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, China.
Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510635, China.
出版信息
Materials (Basel). 2019 Feb 10;12(3):526. doi: 10.3390/ma12030526.
In order to compensate for the shrinkage of geopolymer pastes uniformly, reactive MgO powders are evenly dispersed in the geopolymer. The deformation performance, mechanical properties, microstructure and components of geopolymer pastes with reactive MgO are characterized. The effects of the content and the activity of MgO are discussed. The results indicate that the chemical shrinkage, autogenous shrinkage and drying shrinkage decrease with the addition of reactive MgO. MgO reacted with water, and fine Mg(OH)₂ crystals forms as a geopolymer paste. Mg(OH)₂ produces uniform expansion, which refines the pore size of pastes and the compressive strength increases. The shrinkage of the geopolymer pastes is thus effectively compensated.
为了均匀补偿地质聚合物浆体的收缩，将活性MgO粉末均匀分散在地质聚合物中。对含有活性MgO的地质聚合物浆体的变形性能、力学性能、微观结构和成分进行了表征。讨论了MgO含量和活性的影响。结果表明，随着活性MgO的加入，化学收缩、自收缩和干燥收缩均减小。MgO与水反应，在地质聚合物浆体中形成细小的Mg(OH)₂晶体。Mg(OH)₂产生均匀膨胀，细化了浆体的孔径，抗压强度提高。从而有效地补偿了地质聚合物浆体的收缩。
Zotero 插件