摘要
通过实验,得到了高强混凝土在龄期为13h到28d的抗压强度和劈拉强度;通过控制试件在单轴压力下的环向应变以一定的速率增长,从而得到高强混凝土各龄期的应力一应变全曲线;使用压汞仪测定了混凝土试块在不同龄期的内部孔结构分布情况。从实验结果可发现,早龄期混凝土内部水化过程进行得很快,表现在宏观上就是混凝土的强度迅速增长和脆性的提高,而在微观上则是孔隙率及孔结构的变化。
The compressive strength, the splitting tensile strength and the whole stress - strain curves of High Strength Concrete at the early age of 13h. - 28d. have been experimentally tested. Meanwhile, the porosity and pore stracture have been also measured by Mercury Instrusion Method. Besed on the rezults, it is found that the hydration progress of concrete at early age is in a very high quickness and to express the rapid increasing of strength and brittleness, in macroscope, and the changing of porosity and pore structure, in microscope.
出处
《混凝土与水泥制品》
北大核心
2003年第5期5-7,共3页
China Concrete and Cement Products
基金
国家自然科学基金(50178063)
关键词
高强混凝士
早龄期
应力-应变全曲线
孔隙率
孔径分布
Hig Strengture Concrete
Early age
Whole stress - strain curve
Porosity
Pore - distribution
