CAJ | 학술논문

用光学显微镜和电子天平相结合的方法，在室温（约290K）、1个大气压、相对湿度约45%的条件下，对水泥浆体的显微图像和质量进行了实时的测量.结果表明，水泥的水化反应可以划分为4个过程：1）0至t1（=8.3min）的I过程，水泥浆体的约化亮度I s随t近似线性增加，同时约化质量m随t线性减小；2） t1至t2（=27.9min）的II过程，Is随t快速近似线性增加，同时m随t线性减小；3）t2至t3（=46.3min）的III过程，随时间t的增加，m先快速、然后缓慢下降到稳定值， Is几乎不变；4）t3以后的VI过程，m和Is不随t变化.水泥浆体质量减少是因为其中水的挥发，其颜色变淡是因为其中CH的形成. t1之前CH的形成率较低，而t1至t2是CH形成率较快的时期， t2之后已经基本没有CH形成.因此， t1、t2分别表征的是诱导期、加速期的结束.从t2至t3时期，浆体中水仍有少量挥发，但已经不再有CH的生成. t3以后，浆体水分挥发得极少，也不再有CH的生成.
용광학현미경화전자천평상결합적방법，재실온（약290K）、1개대기압、상대습도약45%적조건하，대수니장체적현미도상화질량진행료실시적측량.결과표명，수니적수화반응가이화분위4개과정：1）0지t1（=8.3min）적I과정，수니장체적약화량도I s수t근사선성증가，동시약화질량m수t선성감소；2） t1지t2（=27.9min）적II과정，Is수t쾌속근사선성증가，동시m수t선성감소；3）t2지t3（=46.3min）적III과정，수시간t적증가，m선쾌속、연후완만하강도은정치， Is궤호불변；4）t3이후적VI과정，m화Is불수t변화.수니장체질량감소시인위기중수적휘발，기안색변담시인위기중CH적형성. t1지전CH적형성솔교저，이t1지t2시CH형성솔교쾌적시기， t2지후이경기본몰유CH형성.인차， t1、t2분별표정적시유도기、가속기적결속.종t2지t3시기，장체중수잉유소량휘발，단이경불재유CH적생성. t3이후，장체수분휘발득겁소，야불재유CH적생성.
Integrating light microscope with electronic balance, the microscopic image and mass of the cement paste were measured in real-time under one bar pressure and 45%RH (relative humidity) at room temperature (about 290K). The result shows that hydration reactions of the cement can be divided into four processes: 1) process-I appears from 0 to t 1 (=8.3min) where the reduced luminance (I) of the cement pastes increases, while the reduced mass (m) decreases with time;2) process-II starts from t1 to t2 (=8.3min), and during which I goes up rapidly meanwhile m declines with time; 3) process-III emerges between t2 to t3 (=27.9min) where m drops first rapidly and then slowly to a steady value, but I almost keeps constant with time;4) process-IV arises after t3, and both I and m do not vary with time. Combining the knowledge about hydration reaction of cement with the author’s some new ideas, it was proposed that I originates from evaporation of the water, while the fading color results in the form of Ca(OH) 2 (CH). In the process-I, the formation of CH is at low rate, but the formation rate comes faster during the process-II, and there is no formation of CH after the process-II. So, t1 and t2 expresses, respectively, the end of the initial period and acceleration period. From t2 to t3, a little water of cement still volatilizes, but no CH generates. There is little water to volatilize and CH also does not form after t3.