引气剂对混凝土气泡特征参数的影响.pdfVIP

36 3 ( ) Vol. 36 No. 3 2008 3 JOU RNAL OF TONGJI U NIV ERSITY( NAT URAL SCIENCE) Mar. 2008 1 1 1 2 杨钱荣, 张树青, 杨全兵, 季文革 ( 1. , 200092; 2. , 324200) : 6 . , , , ; , . , , , ; , . , . : ; ; ; : T U 528. 1 : A : 0253- 374X( 2008) 03- 0374- 05 Effects of Ai-r Entraining Agent on Air Void Parameters of Concrete 1 1 1 2 YA N G Qianr ong , ZHA N G Sh uqi ng , YAN G Quanbing , JI Weng e ( 1. K y Laboratory of Advanc d Civil Engin ring Mat rials of th Ministry of Education, Tongji Univ rsity, Shanghai 200092, China; 2. Santgr n Biot chnology Co. , Ltd. , Changshan 324200, China) Abstract: Air void param t rs of concr t add d w ith six typ s of air ntraining ag nts ( AEA) w r studi d. Th r sults show that th r is no r lationship b tw n air cont nt in fr sh concr t and that in hard n d concr t x c pt concr t w ith SJ AEA, nor is th r a n c ssary r lationship b tw n air con- t nt in fr sh concr t and spacing factor of hard n d concr t . Th r ar substantial diff r nc s in spacing factor and air void siz distribution b tw n concr t s w ith diff r nt AEAs and it is still so v n w h n th r is v n w ith sam air cont nt in fr sh concr t .Air void param t r of concr t w ith SJ AEA is b tt r than that of concr t with oth r AEAs. With th incr as of air cont nt in fr sh concr t w ith th sam AEA, spacing factor first d cr as s and th n incr as s to som xt nt. Ov rrun air ntraining w ould r sult in poor air void param t rs. Air cont nt is