Page 158 - 《水资源与水工程学报》2022年第5期
P. 158

! 33 " ! 5 #                      & ' ( ) & * + , -                               Vol.33No.5
               2022 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2022

            DOI:10.11705/j.issn.1672-643X.2022.05.19


                       [\]^”ˆe=?_š`lm:‹Œ



                                            !BB, = ¹, 7qº, »¼½
                                        ( ùfP& ÌýWNOUX&Y, ¤s ùf 315211)
                 C D: B—J?ÌÍæ16yC#½}ÅÓ³ ¦§, F£%¾¡、 áúûˆC6¡、XRD,á×á(, >?
                 —ÅÓO£„ÌÍæ16yC#½Lºd<ƒÉ¿ ¦§。ÉßÎà: 1¼ÌÍæáuÂC#½{Ë ÅÓ, Ì
                 Íæ16B 30%ÚC#½{Ë ÅÓ®½°P; ÷øÌÍæ16 ij, C#½´ì½ÍiP, ÅÓ¾´ì½Í
                 ‘±, ±ìxNäÙiP, C#½ ìÉ¿ÈhÝßJq, ÅӾƿþQê, ;“ CaCO; ÅÓÜIŽC#½{
                                                                                      3
                 Ë9J 1L,30%ÌÍæ16{Ënÿ¾ A’9Jv½änÿ:‘±— 72%。
                 EFG: C#½; ÅÓ; ÌÍæ16; <ƒÉ¿; 9Jv½
                 HIJKL:TV41   MNOPQ:A    MRSL:1672643X(2022)05015406
                  Effectofflyashdosageonmicrostructureofcarbonizedcementpaste

                                     BAIJiajia,LINNan,WANGJianmin,LIUJunzhe
                           (SchoolofCivilandEnvironmentalEngineering,NingboUniversity,Ningbo315211,China)

                 Abstract:Inordertoexploretheinfluenceofflyashcontentonthecarbonationresistanceofcement
                 paste,themercuryintrusionmethod,evaporativewatercontentmethodandXRDdiffractionpatternwere
                 usedtostudytheinfluenceofflyashcontentontheinternalmicrostructureofcementpasteundercar
                 bonation.Theresultsshowthattheincorporationofflyashpromotesthecarbonationofthecementpaste
                 specimens ,andthecarbonationdepthofthespecimensisthelargestwhenthedosageofflyashis30%.
                 Withtheincreaseoftheflyashdosage ,thetotalporosityofthecementpasteincreases,thetotalporosity
                 aftercarbonationdecreases ,theproportionofsmallporesincreases,theporestructureofthecement
                 pasteisimproved ,thecalciumalumaftercarbonationdisappears,andcalciumcarbonateisgenerated.
                 Thecarbonationisconducivetothehealingofcracksinthecementpastespecimens,andtheaverage
                 crackwidthwith30% flyashdosageisreducedby72% comparedwiththatbeforethemaintenanceof
                 flyash.
                 Keywords:cementpaste;carbonation;flyashdosage;microstructure;crackwidth

                                                               Á–。Á–,Y—§ÀLµeP…ÎØ9J, À“
            1 ./01
                                                               ð#Ì ˜9, É¿ zސ_·¸                [5-7] 。¬d>
                 %úv ¢áÓÅ(ã³úLWð#Ìv ö                          ?ð#Ì ÅÓPXêÜJ« fF89。
            ³Ê}û;Ó&ÉG;“ÅãƅC, ¢ð#Ì                                 ÌÍæc†ÂJÂÃPXvÿš¯ 1ÌÌ,
            ö½·¸, Š~z#7Bð#Ì ÅÓ                  [1-2] 。ÅÓ      ÈÃÄOЁ 1~100μ m n³。ð#Ìv1¼
            PXv ;“ÊÇȎºdì½v, •ë—ð#Ì                            ÌÍæ, ‚ToÈhð#Ì ³, tfuQC
             žf½, ¢®ð#Ì}%、 }S½iP                 [3-4] 。T     #†t‘qC#£6, ·¸“v, ‘qPú]^, ¬
            cÅÓ,·¸ð#Ìy§À 4ÿ_, iÅÓ®                            dUXv®¯JöJ= G£               [8-9] 。"=&•y
            ½±Pð#Ì4ÿ×R½Ú, ,âã§ÀÎ؈ž                            1jÌÍæ ð#Ì7—P6 fg>?DG¤S
             4ÿÿ, ¢®§ÀOPÏö%úv, <ˆ§À                           T。hWJ(      [10] >?ûz¤(S½ð#Ì1ÌÍ

                !"#$:20220306; %&#$:20220701
                '()*: !"#$%&'()*(52178223)
                +,-.: -íí(1999-), B, ¹=¼¹4, :6>?;, ª«>?@ABð#̇™³。
                /0+,: Üó`(1964-), /, Žsé_4, 56, 89, 56;<=, ª«>?@ABð#̇™³。
   153   154   155   156   157   158   159   160   161   162   163