混凝土
混凝土
혼응토
CONCRETE
2014年
7期
145-148
,共4页
再生混凝土%真空脱水%净浆裹石%粗骨料预湿%抗压强度%氯离子渗透
再生混凝土%真空脫水%淨漿裹石%粗骨料預濕%抗壓彊度%氯離子滲透
재생혼응토%진공탈수%정장과석%조골료예습%항압강도%록리자삼투
recycled concrete%vacuum dewatering treatment%interface stone enveloped with cement%coarse aggregate pre-wet%com-pressive strength%chloride ion penetration
通过试验研究了真空脱水、净浆裹石和粗骨料预湿三种成型方式对再生粗骨料混凝土抗压强度和抗氯离子渗透性能的影响。结果表明：（1）随着真空度的增加，再生粗骨料混凝土抗压强度是先增大后减小，最佳真空度为0.06 MPa；抗氯离子渗透性能是先增强后减弱，最佳真空度为0.04 MPa。（2）净浆裹石对再生粗骨料混凝土抗压强度和抗氯离子渗透性能有一定的影响。用水泥和75%的水拌制的净浆裹石能明显提高再生粗骨料混凝土的抗压强度；用水泥和50%的水拌制的净浆裹石能明显改善再生粗骨料混凝土的抗氯离子渗透性能。（3）再生粗骨料混凝土抗压强度随着预湿再生粗骨料水量的增加而增大；抗氯离子渗透能力随着预湿再生粗骨料水量的增加是先增强后减弱，最佳预湿用水量为配合比水量的3%。
通過試驗研究瞭真空脫水、淨漿裹石和粗骨料預濕三種成型方式對再生粗骨料混凝土抗壓彊度和抗氯離子滲透性能的影響。結果錶明：（1）隨著真空度的增加，再生粗骨料混凝土抗壓彊度是先增大後減小，最佳真空度為0.06 MPa；抗氯離子滲透性能是先增彊後減弱，最佳真空度為0.04 MPa。（2）淨漿裹石對再生粗骨料混凝土抗壓彊度和抗氯離子滲透性能有一定的影響。用水泥和75%的水拌製的淨漿裹石能明顯提高再生粗骨料混凝土的抗壓彊度；用水泥和50%的水拌製的淨漿裹石能明顯改善再生粗骨料混凝土的抗氯離子滲透性能。（3）再生粗骨料混凝土抗壓彊度隨著預濕再生粗骨料水量的增加而增大；抗氯離子滲透能力隨著預濕再生粗骨料水量的增加是先增彊後減弱，最佳預濕用水量為配閤比水量的3%。
통과시험연구료진공탈수、정장과석화조골료예습삼충성형방식대재생조골료혼응토항압강도화항록리자삼투성능적영향。결과표명：（1）수착진공도적증가，재생조골료혼응토항압강도시선증대후감소，최가진공도위0.06 MPa；항록리자삼투성능시선증강후감약，최가진공도위0.04 MPa。（2）정장과석대재생조골료혼응토항압강도화항록리자삼투성능유일정적영향。용수니화75%적수반제적정장과석능명현제고재생조골료혼응토적항압강도；용수니화50%적수반제적정장과석능명현개선재생조골료혼응토적항록리자삼투성능。（3）재생조골료혼응토항압강도수착예습재생조골료수량적증가이증대；항록리자삼투능력수착예습재생조골료수량적증가시선증강후감약，최가예습용수량위배합비수량적3%。
The effects of three forming technologies,vacuum dewatering, interfacing stone enveloped with cement and coarse aggregate pre-wet,on compressive strength and chloride ion penetration of recycled coarse aggregate concrete are researched by experiments.Results show that:1)The compressive strength of recycled coarse aggregate concrete first increases and then decreases with the increase of the vac-uum degree,the best vacuum degree is 0.06 MPa,the chloride ion penetration of recycled coarse aggregate concrete is enhanced firstly and then weakened with the best vacuum degree of 0.04 MPa.2) Interfacing stone enveloped with cement has certain effects on compressive strength and resistance to chloride ion permeability of recycled coarse aggregate concrete.Interfacing stone enveloped with cement result shows that with75% water can significantly increase the compressive strength of recycled coarse aggregate concrete;however,interfacing stone enveloped with cement with 50% water can improve the recycled coarse aggregate concrete resistance to chloride ion penetration sig-nificantly.3)With the increase of the amount of coarse aggregate pre-wet water,the compressive strength of recycled coarse aggregate con-crete increases and the resistance to chloride ion penetration capacity increases firstly and then decreases,the best amount of coarse aggre-gate pre-wet water is 3% of mixing ratio water .
