CAJ | 학술논문

通过中子成像试验，对混凝土材料的水分侵入及水源中断后内部水分的重分布过程进行了研究。结果表明，应用中子成像能够对非透明混凝土材料内部的水分迁移进行直观的成像追踪和观测；水分能够在短时间内迅速侵入并充满混凝土的裂缝区，随后继续沿裂缝两侧向基体内部侵入，成为水分侵入的内部水源；混凝土外部水源中断后，已侵入的水分在两个方向上进行迁移重分布，一方面水分在非饱和基体的毛细吸附作用下继续向材料深处缓慢侵入，同时混凝土裂缝区域的水分开始向外部扩散而失去，整体水分曲线向外扩展，但含量降低。
통과중자성상시험，대혼응토재료적수분침입급수원중단후내부수분적중분포과정진행료연구。결과표명，응용중자성상능구대비투명혼응토재료내부적수분천이진행직관적성상추종화관측；수분능구재단시간내신속침입병충만혼응토적렬봉구，수후계속연렬봉량측향기체내부침입，성위수분침입적내부수원；혼응토외부수원중단후，이침입적수분재량개방향상진행천이중분포，일방면수분재비포화기체적모세흡부작용하계속향재료심처완만침입，동시혼응토렬봉구역적수분개시향외부확산이실거，정체수분곡선향외확전，단함량강저。
The time-dependent process of water penetration into cracked concrete and its redistribution after stopping water provision have been investigated by means of neutron radiography.Results indicate that neutron radiography can be used to detect water movement in concrete in a visible and quantitative way.Water immediately filled the crack once the cracked concrete was put in contact with water.Then water further moved into the matrix out of the crack.In this case the crack was regarded as an inner water reservoir.When water provision from outside was stopped,the water which already penetrated into concrete would move in two directions.One is to further penetrate into deep of material with a very low speed.In the meanwhile,some water diffused out of the specimen through the crack as a form of vapor. The water profiles expanded to deeper area,but the content of water decreased gradually.