华侨大学学报（自然科学版）
華僑大學學報（自然科學版）
화교대학학보（자연과학판）
Journal of Huaqiao University (Natural Science)
2015年
6期
716-720
,共5页
毛细吸水%水饱和状态%冻融循环%孔结构%混凝土
毛細吸水%水飽和狀態%凍融循環%孔結構%混凝土
모세흡수%수포화상태%동융순배%공결구%혼응토
capillary water absorption%water saturation state%freezing-thawing cycle%pore structure%concrete
研究冻融循环作用下混凝土毛细孔结构的演变规律，并与吸水性及宏观性能相结合，探索毛细孔结构的劣化机制及其对混凝土宏观性能的影响规律。结果表明：水饱和状态是造成冻融循环过程中混凝土孔结构改变的重要因素；利用混凝土毛细吸水系数能够较为明确地反映冻融循环作用下混凝土内部结构的改变；毛细吸水系数初值和增长速率是表征毛细孔结构演变规律的关键参数，毛细吸水系数越大，冻融循环后混凝土强度越低。
研究凍融循環作用下混凝土毛細孔結構的縯變規律，併與吸水性及宏觀性能相結閤，探索毛細孔結構的劣化機製及其對混凝土宏觀性能的影響規律。結果錶明：水飽和狀態是造成凍融循環過程中混凝土孔結構改變的重要因素；利用混凝土毛細吸水繫數能夠較為明確地反映凍融循環作用下混凝土內部結構的改變；毛細吸水繫數初值和增長速率是錶徵毛細孔結構縯變規律的關鍵參數，毛細吸水繫數越大，凍融循環後混凝土彊度越低。
연구동융순배작용하혼응토모세공결구적연변규률，병여흡수성급굉관성능상결합，탐색모세공결구적열화궤제급기대혼응토굉관성능적영향규률。결과표명：수포화상태시조성동융순배과정중혼응토공결구개변적중요인소；이용혼응토모세흡수계수능구교위명학지반영동융순배작용하혼응토내부결구적개변；모세흡수계수초치화증장속솔시표정모세공결구연변규률적관건삼수，모세흡수계수월대，동융순배후혼응토강도월저。
The influence of freezing-thawing cycle on capillary pore structure of concrete was investigated.Combining water absorption and macro performance,the capillary pore structure degradation mechanism under freezing-thawing cycle under the effect of capillary pore structure and its influence on macro properties of concrete were discussed.The results show that the water saturation state is an important factor to change concrete pore structure under freezing-thawing cy-cles;the change of internal structure of concrete under freezing and thawing cycles can be clearly defined by the capillary water absorption coefficient of concrete;the initial value and its growth rate of capillary water absorption coefficient are the key parameter for characterization of pore structure evolution;as capillary water absorption coefficient increases,the concrete strength decreases after freezing-thawing cycle.
