CAJ | 학술논문

采用建筑垃圾中的废弃混凝土制备出Ⅰ类品质再生粗骨料，并按照不同的取代率替代天然粗骨料制备再生混凝土，研究了不同水泥用量体系下Ⅰ类品质再生粗骨料的取代率对再生混凝土抗碳化性能的影响。结果表明，再生混凝土的抗碳化性能随着再生粗骨料取代率的降低和水泥用量的增加而逐渐增强，且逐渐接近于天然骨料混凝土；当水泥用量为500kg/m3且取代率为60%时，其碳化深度相比天然骨料混凝土仅增加0.3mm；再生混凝土中再生粗骨料的取代率不宜过高，最大取代率宜选择在40%～60%之间。
채용건축랄급중적폐기혼응토제비출Ⅰ류품질재생조골료，병안조불동적취대솔체대천연조골료제비재생혼응토，연구료불동수니용량체계하Ⅰ류품질재생조골료적취대솔대재생혼응토항탄화성능적영향。결과표명，재생혼응토적항탄화성능수착재생조골료취대솔적강저화수니용량적증가이축점증강，차축점접근우천연골료혼응토；당수니용량위500kg/m3차취대솔위60%시，기탄화심도상비천연골료혼응토부증가0.3mm；재생혼응토중재생조골료적취대솔불의과고，최대취대솔의선택재40%～60%지간。
The class Ⅰ recycled coarse aggregate is prepared by using the waste concrete in construction waste, and in accordance with different substitution rate of natural coarse aggregate is prepared recycled concrete, the effect of re-placement ratio of class Ⅰ recycled coarse aggregate on the carbonation resistance of recycled concrete in different ce-ment dosage system. The results indicate that the carbonation resistance of recycled concrete increases gradually with the decreasing replacement rate of recycled coarse aggregate and the increasing cement dosage, and is closing to the natural aggregate concrete;when the dosage of cement is 500kg/m3 and replacement rate is 60%, the carbonation depth increases only 0.3mm which is compared with natural aggregate concrete; and the replacement rate of recycled coarse aggregate in recycled concrete should not be too high, the maximum replacement rate can choose between 40%~60%.