混凝土
混凝土
혼응토
CONCRETE
2014年
10期
93-95,98
,共4页
混凝土%粉煤灰%矿粉%强度%和易性
混凝土%粉煤灰%礦粉%彊度%和易性
혼응토%분매회%광분%강도%화역성
concrete%fly ash%slag powder%strength%workability
粉煤灰和矿粉是低强度等级混凝土中最主要的掺合料、在未加掺合料的C30混凝土基础上，将粉煤灰、矿粉在混凝土中单掺或双掺，并以若干组不同掺量的粉煤灰、矿粉对混凝土不同龄期的强度和和易性变化进行研究。试验结果表明：粉煤灰对提高预拌混凝土的和易性效果极好，但混凝土的早期、中期强度发展缓慢，矿粉相对粉煤灰对混凝土各龄期强度发展较快，但和易性差于粉煤灰，二者双掺混凝土后各龄期强度及拌合物和易性均较好，最佳比例为水泥质量的30%~40%。
粉煤灰和礦粉是低彊度等級混凝土中最主要的摻閤料、在未加摻閤料的C30混凝土基礎上，將粉煤灰、礦粉在混凝土中單摻或雙摻，併以若榦組不同摻量的粉煤灰、礦粉對混凝土不同齡期的彊度和和易性變化進行研究。試驗結果錶明：粉煤灰對提高預拌混凝土的和易性效果極好，但混凝土的早期、中期彊度髮展緩慢，礦粉相對粉煤灰對混凝土各齡期彊度髮展較快，但和易性差于粉煤灰，二者雙摻混凝土後各齡期彊度及拌閤物和易性均較好，最佳比例為水泥質量的30%~40%。
분매회화광분시저강도등급혼응토중최주요적참합료、재미가참합료적C30혼응토기출상，장분매회、광분재혼응토중단참혹쌍참，병이약간조불동참량적분매회、광분대혼응토불동령기적강도화화역성변화진행연구。시험결과표명：분매회대제고예반혼응토적화역성효과겁호，단혼응토적조기、중기강도발전완만，광분상대분매회대혼응토각령기강도발전교쾌，단화역성차우분매회，이자쌍참혼응토후각령기강도급반합물화역성균교호，최가비례위수니질량적30%~40%。
Fly ash and mineral powder is the main admixtures of low-grade concrete.In this paper ,the workability and strength of con-crete when mixing up fly ash,slag powder or two kinds of mineral admixtures in the concrete without admixtures are learned.In the process of analysis,the experiments are made by the several groups of different proportion of fly ash and slag powder.Results showed that the ad-mixture of fly ash have better effect on improving the workability of concrete than slag powder , the early and medium compressive strength grows slower when mix up fly ash.when slag powder is singly mixed up in the concrete ,the early strength,medium strength and the late strength is obviously higher than singly mixing up fly ash ,but the workability is lower than mixing up fly ash.The workability and each age of strength are better when mixing up two kinds of mineral admixtures.And the most appropriate proportion of mixing is 30%~40%.
