华中科技大学学报（自然科学版）2025，Vol.53Issue(8)：51-58,8.DOI:10.13245/j.hust.250496
微波养护对活性粉末混凝土力学性能的影响
Effects of microwave curing on mechanical properties of reactive powder concrete
摘要
Abstract
The effects of microwave curing with different parameters(output power and duration)and the combined curing of microwave and dry air heating on the mechanical properties of reactive powder concrete(RPC)were studied.The microstructure of RPC under the two curing regimes was analyzed by X-ray diffraction,scanning electron microscopy and mercury intrusion porosimetry.The results indicate that microwave curing obviously improves the early mechanical properties of RPC,and appropriately prolonging the microwave duration is beneficial for further enhancing the mechanical properties.However,with the increase of RPC size,the improvement effect of microwave curing on mechanical properties will be affected.The limitation of single microwave curing can be overcome and the mechanical properties of RPC can be further improved by using the combined curing of microwave and dry air heating.The reason is that a dense microstructure framework system is formed inside the RPC during microwave curing stage,which builds a high-temperature steam curing environment similar to the"autoclaving"in the subsequent dry air heating.This environment further accelerates the hydration of cement and the pozzolanic activity of admixtures,which generates hydration products with more and denser structure to fill the internal pores and optimizes the pore structure as well.关键词
活性粉末混凝土/微波养护/组合养护/力学性能/微观结构Key words
reactive powder concrete/microwave curing/combined curing/mechanical properties/microstructure分类
建筑与水利引用本文复制引用
牛旭婧,许雍久,朱可欣,朋改非..微波养护对活性粉末混凝土力学性能的影响[J].华中科技大学学报（自然科学版）,2025,53(8):51-58,8.基金项目
国家自然科学基金资助项目(52378277,52008230,51878032,52130901) （52378277,52008230,51878032,52130901）
北京市自然科学基金资助项目(8172036,8212013) （8172036,8212013）
中央高校基本科研业务费专项资金资助项目(2023ZKPYLJ05). （2023ZKPYLJ05）
