Page 180 - 《水资源与水工程学报》2022年第3期
P. 180

!33 " ! 3 #                       & ' ( ) & * + , -                               Vol.33No.3
               2022 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2022

            DOI:10.11705/j.issn.1672-643X.2022.03.23


               ›š´>gBX@¤:{ߥ¦!|2úûTU



                                      ËÌÍ, ήÏ, DЙ, ŠUÑ, ÒÓÔ
                                    ( ]qY:/0k6 WZ*‚.lm6n, q] xj 712100)
               D E: éžÚ˱Ï…d|ÿÜCCŽ»°±2{L0。B+AéžÚ˱Ï® 0.30~0.36 cd¯v
               d|ÿÜC^+"、 ¿ŽÛ"“€x(éê(^, ŸŸsd|ÿÜC¯Ðg5¿9¶°±ÍÎn‹。›œ
               : ®µÉW|»PÞ@ÓÔéžÚ˱Ïâk, d|ÿÜC^+"ÊËÞ¿ñY«<áùÃØÙ, ŠñW
               |»çJ!^+"*k; ®µÉW|»@, ÓÔéžÚ˱Ïâk, d|ÿÜC 28d ¿ŽÛ"ÊËÞP#þt
               âkØÙ, ŠW|»}ñçàáâk 28d ¿ŽÛ"; ÓÔéžÚ˱Ïâk, d|ÿÜC 28d €x(­
               ÞP#þtâÚØÙ, ®éžÚ˱Ïs 0.32 |§{þÐ, ŠéžÚ˱Ï½s 0.30、0.34、0.36 |¨v¡
               ö 7d €x(­ÁžR 28d ʀx(­ 50%Ÿ«, Zd|ÿÜC€x(®ÌŸâÛ²Ý。
               FGH: d|ÿÜC; €x(; éžÚ˱Ï; ¿9¶°±; ¿ŽÛ"
               8IBJK:TV431   LMNOP:A    LQRK:1672643X(2022)03017606

                           Effectofvolumefractionofcoarseaggregateondrying
                                          shrinkageofmoldbagconcrete

                           JIAORunhao,CHEFangchi,WANGZewei,LIUHongda,LOUZongke
                    (CollegeofWaterResourcesandArchitecturalEngineering,NorthwestA&FUniversity,Yangling712100,China)

               Abstract:Thevolumefractionofcoarseaggregateisakeyindexforthemixratiodesignofmoldbagcon
               crete.Inordertoprovidesomereferenceforthecrackresistancedesignofmoldbagconcretelinedchan
               nels ,theinfluenceofcoarseaggregateontheslumpflow,compressivestrengthanddryingshrinkageof
               moldbagconcreteisstudiedwhenthevolumefractionoftheaggregatefallsintherangeof0.30-0.36.
               Theresultsshowthatunderthethesamewater-binderratio,theoverallslumpflowofmoldbagconcrete
               riseswithfluctuationsandthenstabilizeswiththeincreaseofthevolumefractionofthecoarseaggregate ,
               andthelowerthewater-binderratiothelargertheslumpflow.Underthesamewater-binderratio,the
               volumefractionofcoarseaggregatedecreasesfirstandthenincreasesthe28dcompressivestrengthofmold
               bagconcrete ,whereasthedecreaseofwater-binderratiosignificantlyincreasesthe28dcompressive
               strength.Withtheincreaseofthevolumefractionofcoarseaggregate,the28ddryingshrinkagerateof
               moldbagconcretedecreasesfirstandthenincreases ,andtheminimumvalueisreachedwhenthevolume
               fractionis0.32.Thecorrespondingdryingshrinkagerateofthefirst7dayscanreachmorethan50% ofthe
               totaldryingshrinkagerateof28dwhenthevolumefractionofcoarseaggregateis0.30 ,0.34and0.36,in
               dicatingthatthedryingshrinkageofthemoldbagconcreteincreasesrapidlyattheearlystage.
               Keywords:moldbagconcrete;dryingshrinkage;volumefractionofcoarseaggregate;crackresistancede
               sign ;compressivestrength

                                                               ž÷!deÿÜCZ9˜Cld|oè†&0
            1 ./01
                                                               °, d | ÿ Ü C 0 × t — § è ‰  Û " “ w Û
                 d|ÿÜC0°…LîkeY¶~M$ÃÑV                          ¶  [1] , ž[1g5¯Ð“ðj•        [2] 。;~FÿÜC

                !"#$:20211109; %&#$:20220421
                '()*: q]%k6Pê&ëì.3(S202010712479)
                +,-.: ž´Î(2000-), a, #q¥=K, Å/P, (^‰FsWlX²Ú。
                /0+,: Ï´/(1962-), q]ö¶K, ÓM, NO, ÓMPQR, (^‰FsWlX²Ú。
   175   176   177   178   179   180   181   182   183   184   185