CAJ | 학술논문

研究了超细粉煤灰单掺、硅灰-超细粉煤灰复掺对复合水泥粉体压实体空隙率、硬化浆体孔结构和抗压强度的影响规律；同时，研究了砂率对砂石骨料混合体系空隙率的影响规律；并结合两者研究内容开展超高强混凝土配制研究。结果表明：超细粉煤灰30%时，超细粉煤灰-水泥复合粉体压实体空隙率最小；硅灰在0~10%范围内等质量取代超细粉煤灰，可进一步降低硅灰-超细粉煤灰-水泥复合粉体压实体空隙率，硅灰掺量8%时，复合水泥压实体空隙率最低；复合水泥粉体压实体空隙率越小，复合水泥硬化浆体孔隙率越小、有害孔含量越少、28、60 d 抗压强度越高；砂率45%时，砂石骨料混合体系空隙率最低；通过调整胶凝材料粉体堆积空隙率和砂石骨料混合空隙率，可配制出28 d 抗压强度≥135 MPa，60 d 抗压强度可达到≥145 MPa 的超高强自密实混凝土。
연구료초세분매회단참、규회-초세분매회복참대복합수니분체압실체공극솔、경화장체공결구화항압강도적영향규률；동시，연구료사솔대사석골료혼합체계공극솔적영향규률；병결합량자연구내용개전초고강혼응토배제연구。결과표명：초세분매회30%시，초세분매회-수니복합분체압실체공극솔최소；규회재0~10%범위내등질량취대초세분매회，가진일보강저규회-초세분매회-수니복합분체압실체공극솔，규회참량8%시，복합수니압실체공극솔최저；복합수니분체압실체공극솔월소，복합수니경화장체공극솔월소、유해공함량월소、28、60 d 항압강도월고；사솔45%시，사석골료혼합체계공극솔최저；통과조정효응재료분체퇴적공극솔화사석골료혼합공극솔，가배제출28 d 항압강도≥135 MPa，60 d 항압강도가체도≥145 MPa 적초고강자밀실혼응토。
The effects of UFA single doped and silica fume-UFA co-doped on composite cement powder pressure entities porosity,hard-ened paste pore structure,hardened paste compressive strength are studied.The study of the influence of sand ratio on the voidage of aggre-gate.Experimental study on preparation of ultra high strength concrete according to the two research.The results showed that when the con-tent of ultra fine fly ash was 30%,UFA-Cement composite achieved the densest packing density.In the range of 0~10%,silica fume equal replace UFA can continue to reduce the pressure entities porosity of Silica fume-UFA-cement composite powder,when the content of silica fume was 8%,silica fume-UFA-cement composite achieved the densest packing density.When the compacting voidage value reaches mini-mum,the average pore radius and maximum pore radius of hardened cement paste reach the minimum values.In addition,the 28 d and 60 d compressive strength of composite cement paste was higher.when the sand ratio was 45%,aggregate achieved the densest packing density. Adjust the compacting voidage of composite cement and the voidage of aggregate,can produce ultra high strength self-compacting con-crete with 28 d compressive strength ≥135 MPa,60 d compressive strength ≥145 MPa.