In order to study the thermal conductivity of concrete at early age under low temperature environment,the thermal conductivity of concrete specimens was tested by heat flow meter thermal conductivity instrument.The thermal conductivity of concrete at early age under-5℃,5℃ and 20℃ curing environment was investigated.At the same time,the compressive strength of concrete at various ages was measured by low-field nuclear magnetic resonance technology.The water content and porosity of concrete at different curing temperatures are studied.The results show that the water content and porosity of concrete gradually decreases with age increase,the compressive strength increases with age increase,and the thermal conductivity is negatively correlated with age and curing temperature.
关键词
早龄期/导热系数/抗压强度/低场核磁共振
Key words
early age/thermal conductivity/compressive strength/low-field nuclear magnetic resonance
万方数据