CAJ | 학술논문

以砂、碎石为骨料，粉煤灰及少量的硅灰为胶凝材料，水玻璃、氢氧化钠为激发剂制备了地质聚合物混凝土，测试了不同养护温度及时间下粉煤灰基地质聚合物混凝土的抗压强度，旨在揭示养护温度及龄期对粉煤灰基地质聚合物混凝土强度发展的影响规律。结果表明：在20~80℃之间，提高养护温度可以提高粉煤灰基地质聚合物混凝土的抗压强度，并呈现线性增长的关系，进一步提高养护温度会导致试样表面微裂纹的产生，进而导致抗压强度有所下降；地质聚合物混凝土的抗压强度随龄期的增加而增大，并趋于稳定，该趋势可用指数函数加以描述；早期的高温养护会加速聚合化反应速度，降低聚合化反应时间，即高温短时养护可达到低温长时养护的效果。
이사、쇄석위골료，분매회급소량적규회위효응재료，수파리、경양화납위격발제제비료지질취합물혼응토，측시료불동양호온도급시간하분매회기지질취합물혼응토적항압강도，지재게시양호온도급령기대분매회기지질취합물혼응토강도발전적영향규률。결과표명：재20~80℃지간，제고양호온도가이제고분매회기지질취합물혼응토적항압강도，병정현선성증장적관계，진일보제고양호온도회도치시양표면미렬문적산생，진이도치항압강도유소하강；지질취합물혼응토적항압강도수령기적증가이증대，병추우은정，해추세가용지수함수가이묘술；조기적고온양호회가속취합화반응속도，강저취합화반응시간，즉고온단시양호가체도저온장시양호적효과。
Using sand and crushed rock as aggregate,fly ash and some silica fume as precursor,sodium hydroxide and water glass as ac-tivator,a geopolymer concrete was produced.The effect of curing temperature and age times on the compressive strength of the fly ash geopolymer concrete were studied.The results show that the compressive strength of the geopolymer concrete increases lineally with curing temperature in the range of 20℃to 80℃.When the curing temperature is further increased up to 100℃,a 3.1%decrease in compressive strength will be observed as compared to that cured at 80℃.This is due to high temperature curing induced microcracks formed on the sur-face of the samples.As well as the curing time concerned,the compressive strength increased at initial curing periods and gradually tended to level off at later period.The tendency can been captured by an exponential decay function.Further analysis revealed that increasing initial curing temperature can enhanced the geopolymerization process,and then achieved high compression strength in a short time as compared to the samples curing at ambient temperature.