CAJ | 학술논문

通过简单破碎制得Ⅱ类再生粗骨料(JP),并经过一次颗粒整形得到准I类再生粗骨料(YK),再进行二次颗粒整形获得I类再生粗骨料(EK)。研究再生粗骨料不同品质(JP、YK、EK)和不同取代率(φz=0、20%、40%、60%、80%、100%)取代天然骨料(TR)对再生混凝土的用水量和抗压强度的影响。结果表明,再生混凝土的用水量随着取代率的增大而增大；掺入不同品质的再生粗骨料对再生混凝土的抗压强度影响差别很大,当φz≥40%时,JP再生混凝土抗压强度降低幅度较大,YK再生混凝土抗压强度没有较大幅度的降低,而EK再生混凝土的抗压强度先小幅升高后降低,当φz=100%时,28d抗压强度仅降低1MPa。
통과간단파쇄제득Ⅱ류재생조골료(JP),병경과일차과립정형득도준I류재생조골료(YK),재진행이차과립정형획득I류재생조골료(EK)。연구재생조골료불동품질(JP、YK、EK)화불동취대솔(φz=0、20%、40%、60%、80%、100%)취대천연골료(TR)대재생혼응토적용수량화항압강도적영향。결과표명,재생혼응토적용수량수착취대솔적증대이증대；참입불동품질적재생조골료대재생혼응토적항압강도영향차별흔대,당φz≥40%시,JP재생혼응토항압강도강저폭도교대,YK재생혼응토항압강도몰유교대폭도적강저,이EK재생혼응토적항압강도선소폭승고후강저,당φz=100%시,28d항압강도부강저1MPa。
Recycled coarse aggregate of Class Ⅱ (JP) was prepared by simple crushing, and then quasi class I recycled coarse aggregate (YK) was acquired through a particle shaping process, since then class I recycled coarse aggregate (EK) was acquired through a second particle shaping process. The influence on the amount of water and compressive strength of recycled concrete of different quality and substitution rate (φz=0, 20%, 40%, 60%, 80%, 100%) of recycled coarse aggregate (JP, YK, EK) to replace natural aggregate (TR) were studied. The results show that the amount of water of recycled concrete increases withincreasing; the incorporation of different quality of recycled coarse aggregate greatly affects the compressive strength of recycled concrete, when φz is more than 40%, the compressive strength of JP recycled concrete greatly reduces, the compressive strength of YK recycled concrete does not greatly decrease, while the compressive strength of EK recycled concrete slightly increases, and then decreases, when φz=100%, its 28d compressive strength just reduces by 1MPa.