人民黄河
人民黃河
인민황하
Yellow River
2014年
2期
126-128
,共3页
英丕杰%刘福胜%孙雷%周广发%宋计勇
英丕傑%劉福勝%孫雷%週廣髮%宋計勇
영비걸%류복성%손뢰%주엄발%송계용
花岗岩石粉%混凝土%流动性%黏聚性
花崗巖石粉%混凝土%流動性%黏聚性
화강암석분%혼응토%류동성%점취성
granite powder%concrete%fluidity%cohesiveness
通过实测胶砂流动度和混凝土和易性等,研究了花岗岩石粉作为掺合料等量取代水泥对水工混凝土工作性能的影响。试验结果表明:花岗岩石粉粒径与水泥粒径相比更细,且粒径分布更加均匀,用作水泥制品的掺合料有利于改善混凝土的孔结构;花岗岩石粉的需水量比为95%,颗粒分布较水泥更均匀且粒度更细,掺入花岗岩石粉后胶砂体系级配更好,等量取代水泥时,胶砂流动性相对于基准水泥显著提高;在水胶比相同情况下,随着混凝土设计强度等级的提高,水泥和花岗岩石粉总量提高,混凝土坍落度随之增大,但其黏聚性变差,泌水率升高,凝结时间也随之增加。
通過實測膠砂流動度和混凝土和易性等,研究瞭花崗巖石粉作為摻閤料等量取代水泥對水工混凝土工作性能的影響。試驗結果錶明:花崗巖石粉粒徑與水泥粒徑相比更細,且粒徑分佈更加均勻,用作水泥製品的摻閤料有利于改善混凝土的孔結構;花崗巖石粉的需水量比為95%,顆粒分佈較水泥更均勻且粒度更細,摻入花崗巖石粉後膠砂體繫級配更好,等量取代水泥時,膠砂流動性相對于基準水泥顯著提高;在水膠比相同情況下,隨著混凝土設計彊度等級的提高,水泥和花崗巖石粉總量提高,混凝土坍落度隨之增大,但其黏聚性變差,泌水率升高,凝結時間也隨之增加。
통과실측효사류동도화혼응토화역성등,연구료화강암석분작위참합료등량취대수니대수공혼응토공작성능적영향。시험결과표명:화강암석분립경여수니립경상비경세,차립경분포경가균균,용작수니제품적참합료유리우개선혼응토적공결구;화강암석분적수수량비위95%,과립분포교수니경균균차립도경세,참입화강암석분후효사체계급배경호,등량취대수니시,효사류동성상대우기준수니현저제고;재수효비상동정황하,수착혼응토설계강도등급적제고,수니화화강암석분총량제고,혼응토담락도수지증대,단기점취성변차,비수솔승고,응결시간야수지증가。
The study on the working performance of hydraulic concrete,in which some amount of cement was replaced by granite powder,was car-ried out via the measurement of the fluidity of mortar and the workability of concrete. The results are extracted as follows:The size of granite powder is slimier than that of cement particle and well-distributed. As admixture for cement products,the granite powders improve its structure of the inner pore;Water demand ratio of granite stone powder is 95%,the size is slimier than that of cement particle and well-distributed,after mixed with granite powder,the mortar grading system is better,equivalent replacement of cement,the liquidity of mortar relative to the benchmark cement im-proved significantly;Under the condition of the same water/cement ratio,with the improvement of design strength grade of concrete,the volume of cement and granite powder is increasing,the slump of concrete increases,but the cohesiveness is poor,the bleeding rate is increased,the setting time is also increased.