CAJ | 학술논문

用建筑垃圾废弃混凝土再生粉体按一定比例部分替代高炉矿渣粉，设定不同替代比例进行胶砂实验，通过测试7 d和28 d抗压强度，对比不同替代比例对高炉矿渣粉活性的影响，实验表明废弃混凝土粉体部分替代高炉矿渣粉对早期强度影响很小，但对其后期强度有一定影响，通过控制适当比例，可有效保证产品质量，且不会对产品的吸水率造成明显影响。同时，选定废弃混凝土细集料掺混比例为10%进行两种物料的混磨性能试验。粉磨时间分别设定20 min，35 min，50 min，65 min和80 min。通过对比各时间段物料的比表面积来分析其易磨性，实验表明废弃混凝土细集料比高炉矿渣的易磨性好，但单磨时会出现团聚现象；通过混掺共磨可以提高高炉矿渣粉磨效率、降低粉磨时间、节约粉磨能耗，具有一定的助磨作用。
용건축랄급폐기혼응토재생분체안일정비례부분체대고로광사분，설정불동체대비례진행효사실험，통과측시7 d화28 d항압강도，대비불동체대비례대고로광사분활성적영향，실험표명폐기혼응토분체부분체대고로광사분대조기강도영향흔소，단대기후기강도유일정영향，통과공제괄당비례，가유효보증산품질량，차불회대산품적흡수솔조성명현영향。동시，선정폐기혼응토세집료참혼비례위10%진행량충물료적혼마성능시험。분마시간분별설정20 min，35 min，50 min，65 min화80 min。통과대비각시간단물료적비표면적래분석기역마성，실험표명폐기혼응토세집료비고로광사적역마성호，단단마시회출현단취현상；통과혼참공마가이제고고로광사분마효솔、강저분마시간、절약분마능모，구유일정적조마작용。
Waste concrete is used to replace blast-furnace slag powder (BFSP) to replace mortar experiments in different ratio. Through the 7 days and 28 days of unconfined compressive strength test,the effects of different replace ratios on BFSP activity were compared. Experiments showed that the effect on the early strength of BFSP is smal ,but there is some adverse effect on the later strength of BFSP. By control ing appropriate ratio of waste concrete recycled powder, the quality of BFSP can be guaranteed effectively,and its impact on the water absorption of BFSP is not obvious. Then mixed grinding performance test was made when waste concrete fine aggregate mixed ratio was 10%. The grinding time was 20 min,35 min,50 min,65 min and 80 min respectively. Through compared the specific surface area of each time segment material, its grind-ability was found out. Experiments showed that the waste concrete fine aggregate is more easily to grind, but there is agglomeration phenomenon when grind waste concrete fine aggregate only. However,mixed grinding can improve grinding efficiency,reduce grinding time,and save grinding energy consumption. There is certainly helpful effect on grinding the blast furnace slag.