G BAKRI AROELRAIIIM GAAt'AR' AND CABRERA. J.G'G BAKRI AROELRAIIIM GAAt'AR' AND CABRERA. J.G' ... C c

Jow1oIScl(nc~ TfChOOOCC-C o3Id l PGRADFD TEMPERATURE MATCIIED CUIUG

SYSTE~I

BAKRI AROELRAIIIM GAAtAR AND CABRERA J G

ABSTRACT

A compulrr tonfrollcd mpe~ mncMd tuInl )SI=IO simuWe nnamp of(onc tlc n ttrucU~1 prcMnled TM 1)Iem hi Clplbhly 10 K(UreI) (unlro mbiml Icmpel1lllu~

111111101 h)d ion Itmpeun neratth by full) inubilcd COlIC 5pilClmt 110 It il capable of IImulllillnyroolini ~ hicoh mght0laquo on iC Mid Iioh dtpmd~ on Ihkknns of _t ~lemmll)pe of (_ on ambtonl penllun humodi) end 00 Clocn) 1_ ( ~Icr dfT~ com~nKlflIIWd ~Ot- and S ( IId lS I piftd h d111 ( cnnerclt curnl ~nJ ttmoadabac -ncjn 1WIltl ttlet r -lall1 cooion_ c c Igt d~at oa 1t111 ot uh ofmgtJIh IJOfOIoIIgt 1Id pmnabolot) 110t nn_~ 0( ~ 5-h 1ft prupnlonoiQM(mt cuted 111M dlTcmo tn_I 1 IKhhlhlcd

ow JjJ-A suJ ~ -Ioo- bullil-~raquo - )

pJJ u LoW

ltJ- lJ L1 J WI jaJ J ~ iJ1aoJ oJII

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-J __) lop H JaJ -J -J t J- dI k

middotV --- - J-aII J - J ---I bull __ ~l~middott U S( -- JoJ_J~JIgt~-

Igt-rnnkI1I tor (1 II lonjlfIImiddotTlrli (ull~ lIf1nlllfllmiddotn ngo I S I ST

bull IgtlIIrlnlgtnI r(Oi II I nlllfllnil Unl-nl l) lIr ICI-ds UK

Joumfll ofSc~nn a TechlH)lolY

ITAObtCTlO~

BlaquouII ) 1(1 ocal and 1Mo1Ds_1 pfttOOMt U ~ 10 Ihmnal dfeca t _h ~1Tlaquob f cwefull) ~ prnd~ quanltlllW dncnphon Qf 1M phmoNocna iOJIIrtCK bull J _AI y~cAh alablt in 1lOA tn- c( SCot TItHe s)SlCm~

lTKuurc iher hnl or ntlc ofMil -o-ion (to both Thcx lIQiurmenl y~ 1 bftoII 10 I) applltd 10 AlQrttlor moft

full) uti) 8 bdI~ioor uf ((fK~I~r) her by mO[()OIi Ihe Ittnp( tII nl~toII IIh 1 n- f an i~il COt~C1 lirUCIUrc ol1d b

)laquo1 OOtKgtCle SJIlaquoriItI) tlh IlIt NOIIC m prooprt1 I~ an

bullbull habllo CIonIIi cond1OtI IA lhe lablnt) (I1JJ TlM ImIptrah1fC roM due 10 the hdnttion ratehon s bull fnctoon of bal beIlaquoA ~ JtMntiN durioJ III chemrul ~JoCttoll and the he loss from lhe oonc~tc od I depends Oil lhe type c( CCtftCfIt bull lIlIU~ of mrli ~tts m proportionbullmblClll and pix tempeflllrc Slruol~ son ~pt and tloc Iype of foo sulllon FCI the _I flIn of Old 1ot11d (CIMftI (0fC) Bott I~ I obsot_ thM ~ of toUtl helM 15 lflIcd bel I 10 J cbraquo) flCO 111 11 tlt 1So III 7 dtt)S Ind 10 90 ~ of loW Iwltt 11 6

mullths Otnd FO(5 I dctbullbull lNa lechqllC fltJot ~Iwn Iidth~ Itmpcnlurc nK of rontIIIC mamplo~(61 prncAlnl _Ihod of AoaKhlI nSIlII 1C1T1~ bc-Niour of conc~c on umrlCo of Ih ~on~IC Ihrrcby inlroduclns Itm~urc Idled currnll ltohntquc 1M tmlpcntln nw dttlll for dITCUIt waion IhdncnC1lnd dffrmll t~pcs

of r(llTllltl1ri ~ prncntcd ~ Hrrrsol7) 11w rnlaquodcd pi ItmptDIII~ II bull nwnltc of tin ltot lr shcwo~hal on n bull ttot placing lenperatu~ is 5C allow lhe 11 d1) Imptflllu~ am iIli d T0110czL (2) d Itarri5Oll( II 50tIJtht 10 dcnIon~C Ielthmqll( nd bcntfll of dItttt obutowd from IIgtlt proo~ 11 f(JNCmact fIoIII il~h or oncrcw 1fI$m

Adoat ealontnctcr MC ~ dceloped II) nun) tHnrcMn (~9 1~) bullM) drra- frontctothw_of pr _dqrtt of IMUlMoon and _thod of Mal ippl~ TM )tt~ U5Cd 11 Ihos itl~csltpIlO il u-ded modfl~ Cf)1OII of 1M ~~I xeloped b)

vetM aAd TolkK~o (11 1 he nco ~ICm PfO odes 10 110 fltlor benft hIIfC _torm~ conrol nd dttuo ItCqitllolll Aloo II _Iudes raClhly of IOIItIOIltnl (OOhnll 1~ ofOIIU~e specI

2001 l(1)2002

JcMNI of omc~ IlaquohoooIotD- ~ J ~I-J

ADIA8ATlCCURI~G

Cono_ bull poot CoMooc_ of hul JO 11) I rIk or 1 ncrion IOUOIImIlOC IUCI_ blaquowown _ ormem cancl(~ _1_ ~ WI lhlll talc lf huI lou flOlll eell TlIis _In lid 11IC1f_ of IMII k~UIf Hownlaquo h) ion PfOIIn- taM af II pMfIllUII declf~ and f1I1 briowhaf lots Thnl 1M ~ 5tC_ bciln I() coot toeonllacr nc Inlcrgtolll Itmporlllulf ~~~Ior af COflCIfte _1I0Il d IlIcrcrorc tkpmtknl on hHI fKIOfJ ~ ~(~nn ~ ~ and Mkgtogt ch_laquonMOCI otl~ URCtIt d I~ -rIlndnl en bull --om bull He~ amefJIoo is IOICOIsulfd u~nG P~ of bull clonmttoer Tllil i uWnI 11) bull Iflllthon ~ssd urmunckd bv an en-lRlltnxntll OOOIIrocr (Iounxlal IIf dldnl broMi InlO dIoac ~If Mat 11m to CII III ~Iuorntr nIjm~ and LM IT 1_ IfIClIOll -egt~1 11 _tMd I conlr)llcd ICIlIptfllUIT Ibe rul dan is Iffarcd lID bullbull

adUlt If conlroliood toempnltUIf cootIoIIfIl_ I stcond c1aos is JiCd MJIltomnaI CondlOClkgtll nlo_~ fall 10 1M Ian c1_ iomt IkItrI ~ 10 -nIlI1II 1M IfI(IOOt ~I I

JWOII~ or tenor COttrOIlN It ayenltlallft protilor The ICmptlll ~1f mKMd cvr ltlppllatvl h I) 10 nlalRhe onrntnlll ttmprfI(UIf of c ttc In( eubn ttl ImIpnlluro of bull

laquoO(1fIe ro i r-amplc- or ~ch ulonmtun( I)) 1M S) len doibN In 1M ( II 111M J(uioll (of~) ~ he pr 1IIlpk of he UIorIlIllt1cr dditWd ltIS IdlbIt~

lIJGRAUFO TDIPERATlR[ 11T(II[1I (URING SViTpoundt nRI~(TfS 1M JlCllCRI laOUI (I W ~yr ~J Uill~ i) lt( 1-11 II r~ I nus 1$

($gt0lt1)) thum bullwnts dcs~ fltmOC( I~ TIIIrft tanls rIC_taI t bull IWI ot Inulant ~ plpn 1Itch HoD tilt eonmuos chlo(dloop W(ul _otrba_Iw u Iftd dw 0 (1 IDJ 1M ClO-amp n_1 umber 2 _ nan mtIdt froa dotoNor ~iIt hf8lt -_mit I_f hdbullbullea ht ~ndvhod In niOllatllll la)er of 50 _ poIywnhaooc r shyIM -= of Ulh taN _iJlpltntn 76 milt X SO III bn bIn~ to all) 1lof Ilaquonntl bc-tltll ClIlfd In tanll ltJhlllised umlplnt 1tal sbnu In Id lankl for k-I dlbutioo nd 1M) to pl1)(CC1 1M ut-flblf 111 frunt ICCitkntr d_lIIltIlr Hnl1t18 Uiltl cIt from 10 I hoImiddotdllpN plnta HI

Vol 1 II) 2002 2002(1)1

---JOIaOil or Scmcc ampI T ednolog 1 J w ~ inwlation bting prm oded by glng50 mm tlltpIded pll~rme ~heelS 0010 1M nuutdo rfce Ib I lgtcaHtlam epv~) pIe [panded polslyTCne SMtU SO mm mMl tOlfred In poI~lhec Ie used as nwllunl hob 011 II tmks Ier is mtultcltJ and 1M ~~~m ~ lhr~ pIII To orhem PP wler from lhe bnlR an~ om I~ numMrS l and o~ M a (ne TM wiler then muns unltk liVII) no from In~ J I tank number 2 back nlo Ibe heaung tank Pump I~Sstso rcwmH altr 10 Iht healn taok The lIetns ~ is also COllneclN 10 i duller IInt Iuthf reqUIred bull bull 1I0wS lhe mu 10 be prr~oolcd 10 ~ starling Icrnperare btkm Imbi~m Iu olalch Ihe slaniolt Iperlure r r hl) lIli cd ~Ollcnl

TH ERMOCOUlLE COogtTRUCfIO AlIO CAUIlRATlOllS T)p T ~rmoxoupl~ ICOJlPCrCO~In) I~ Il$ltd (or tempcrawrr ronlrol l1w lqIIirrd Ifttglh ltgtf IIIe Ihcrnooooopte Itc CIII d Ille PVC 1051 IlIffOIIIldln lho ltnppc d MUla tc cd 10 bull ftnjllh Qf 60 mm frum me cnd In ClKWd Ires re hen Ied amphll) II Ihm lip nd Stldc~d lIng bull gtjXclal ~Plt T Idcj~ lfe Wlltn bull sallsfacI~ bead (dotl J fd II al d cd Ih emeJ piper 10 r~Olte ~ Impullte~

The sulik mrsu~ jll~l of the thenll(ICpk Insned III a open ended 51iloss $1laquo1 IlIbe unlil JI 11 lgtecOOIC pocd bgt approximaltl 6OmIlI lh~ cpogted end (~O mm I the 0lt rcd ilh a Ihic~ cInlj of 0 (nrin~ J~O beal 1I1~ laquonp(~d (Thi mrld ery $ensii In Icmpe m~~lq Ih ~mhl II [llllkd beck inlo lhe wbc kut 1 al 1[ I~ Imm ~[ ltlid llhmiddot h IUM Thi5 cod r Ihclbc Ih leJ h Ikl 111 gtad de 10 Ilennocrupln cunljm~IIgtn r ad laquod~ nfI Mer l1w 01110 l11d ltII he lUbe as Ink-d lh middotaldc and tUcrN th bull hUI vnnl to ti c a htlet prgt~(gtn 2nd IrC~lh dnnllg he bandltng pruceu

Clibrahon Q( btrntgtuupb ~ n~nyen he Ulr lIlt1np bull dal prec 601 dlg1 hm II 111 III I ~ IIh a or~l le1llptr2Wrc or 0 middotC In hO ( I h~ mltnn JIIIgtltW ltIf

nnocClUple 1 subj~ltd gtlIllle 111111 mn~c ICi r ltltshying TfChnc IB401 IKimiddotlllod ( alibmtlt1r Ih emf thiltt 1 plusmn OOS or lh reference Jn1011 ~ p)lccd In ~ 1nllt~d ih Icmperalllr~ $ m rcd n) a cItal~d Ihenmclcr I~h 1~ld

0013(1)2002

Jou1oSc~ TellIIOIOI)

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Vol ) (I) 2002 lOO2 (I))

~uralf- lempratule read In middotnrmxouplo nn

Jaurnal afScltnce amp TecnnalullY

gmfyinll g~ for

output value ithin plusmn I )IV as IlaquoOO1mend~ by Hrlllsh StandacI (14) Pan 5 e~ cnaen fa u~ in the Tem~ue ~blh~ Curi1 lt)~tem

CONTRO fAIYSIS A1D DATA ACQUISITOo The PJif1d~ S)liItm consists ahhe foliolng oornpoMnw I IBf miCro-wmputff 2 Thermocouplend onalol input (pc 73) nd alitpul(PC 24) otcrces 3 Proportional fIOer conlrolle (ISM ~ornp(lIer) d lX) Immeran

~atcfl

This upllfllcled curms lank cantrol system pcrform the folloy Ing operations I Itcll ing Mer in unng t~nks so as to folio till tempomhne

aftollcretc 2 AlIOtomnt ic moniturill8 ofCtnCrCle and ~Ier t~mltlItu

IBM MIC RQ-COMPLTFR J1K IB1 mictIHomptuer is used for cent~1 control nMysibullbullnd da acqulSitlOl1 1be computff performtM fotrawmg acTIons I Transfers dall beteen analog inpur ald output d~ 2 Clculles lemper~ture difTererne beIn onrtle and iler and

then 3 nds iSnal to heaters to equali temperatures 4 Acgt sends I pngtpDnian1 power controller to activate Imlllersron

heaten to adjust temperatur~ cnMr by Belialillg 12 or all h3 IltW 5 immersions heaten 4 Stons all d311 on files or tnlnsf~1$ data to ponter S The oulput data file can be easily transferred oather software for

funher anftlys and presentltion

SOtT WAKE Aliraquo C01lTROL U1rr IoCak soll~ rulultH spreadsheet IS u~ in th~ In-elIgIItiOlllO read Infonnl1l0n from analog input BOO output boords inlO ells in spaIIdsltctt This mfonnaliOl is used sld IIpltbteltll regular ntemiddotal to caiclilate ~d process hpmemal reult~ Fgure 2 Jho$ dlaerammll icall the operatIon of Illeak and the geMral

Jayoul conlrol Unil

21)02 (1)J 4--Vol J (1)2002

-r II I

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--shy - - J ficurt 1 loCale blCNk diacnm

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-shy- shy

TErtP(RATtRE MONITORI NG loClIk ~ WIS insllled a 10 M pr1rt The e_ lIIOIIIon emf 11$ from _0 IIltfIfl(IOollplu II CccIY1( (()IIllol cube alld SI~ thmliIWUplc plactd aI drTemM W IIOIII on he CUf Ulnk uh value bull PKflJ ~IMC cell HI Iho spread lhca Tho emf 11 an CDnMd r -kif ltvI 10 dll IoIpwol by -Ioi 10 du oonH1cr (PC 1)) baud hid is bIoIed idu r PltUIIf3mmc thao conru 11 ff lbamoltoupIci (12 boll) 101M rtllaquo IC 1~IIJICf1Ihcs in dcK~ C SIII bull pol)nomlll lauullOI1 kdIoItICgt (511 OnIor) I d cold JUncIKH compmslhon Id II bull liohd ~t 14 ~_(lM H middot loltr(1 1 be PIIIMlI_ IbN ~D bullbull lCO WIllC oI~ bullbull~ oontrul cub lcmpalllUft Jlnco CONJIl_ we poublc-I C00bullbull101 laquoonordC kmperlhw II _cr an Ik IrmpnM br CQllltoI coaclU Icmperal IS oqual to tln~ ICmpcrllurc cr COl1lrol eoc~ 1tmperUUr1 IS 1IIItt nl kmpem In QJC (I proportl(M PI ~1er(CampvlI_ dlTcftnce In ImIpcralA btt_ tank amd a)IIiroI cube Ind_ iItOCIIIdilllly on

oj J (1)2001 26 2002(1))

Journ1 OSaClKf II T echnolog) J If~ -

the qwntll) or fnffl) nlaquodfdO rtmiUolt I twolllltfd Mill eonlilllOn Th~

os IKhlCVro by eOllroll ins optr1lOft MInll unls flO) lW htaltn I eh can bt opcr1Itci md MlulI or In COIlJ1IC11I)n In eun (bl IIId (el Compultf leU loS I f9OiltMIal Pltgtri 0lfItngt11tr 10 111m II S)_ off tIn1 he +=ed 10 bd Wheu n uku~ Ihtol klllI fCqlllrCd to rnltllaquo~ 1raquo1 pn-dohlaquo wotdt I I ~ bot lt~gtC 10 dluJ 10 -OJ (onltcrwr lid ~Mt ~I) (DA bottrd PC ~~ hh locaced n1Ck MC(JmpUI- eh eUlIOIIn~ h(~ItT$

The 5i1 ~n ~~saI ~lte~ S _Isbullud dlot kgtd on Iegt dlol~

file tH1) IS inuClforrut~rt1rlClt Ihlldlolnhtl s(emd o man application for funher MIII)igt IM proeHl 15dogt-n Ii flo dllvnm shooon n Fip~ 4 In an ttoIfII 10 cool ipKIMM 1( btl rcKlwd the pnl 10 cmpn IIIIUIatN (ooh c t u IIKd (middot It ~ t1Ilt IS produced t1oCd on ral diu oIluontd _inS _1 l hn~

T_tn IoooClCT If c 111M the ( In ~IJ mabullbull h M ~Ulfed ralt o( coohnl ckma1ltkd h mIlIM(I ~II(

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Vol3(I)lOO2 lOOl (t)] II

Journal of~ience amp Technology

OXVGVi P[R1E1ULITY

The oIC)lerJ permeabill1) WlIJ me_red u~~M Leed ~le(2I) Remhl of OXYF penRellbihlY Me presenled in FiSUm 1910 22 lbe ~ull j 01lt concfCle the pc~liy jnlaquo=Qe 1M Ie ralio iIeltfQ$ ilh I~f ilh less redoclion lIietJ di) of CWlnl A compariWn of lhe dfecl of the ImIjlCtltun matched (urinl (Typa It and hp H) 11lt1= that SIImpln cured at pcalt hydl1llion lempetalure ( r ypo B) rcgtultcd in latlmiddotcdy higher pefmCllbilll) than those ubjeced to C1Jn~ T)Ilt The o~YII permtabhTy ~lts of OPCPFA mix fubjocled to lemperllure IMlcho-d curin (type B) are gellCllllly 10111 min those cured II 5 20 and gtSC fhc uon forh bchlourea be Iltribuced 10 the precipiation cruud by the reaction ofthc PFA Bakur (22) SIIggeslCd thll 1le plan OPe m~ prodlgtCC poorer pore stJICtUfe and iampbet permeabilny at lempcmllfl lIiggtera2OC Ie rHClion of PFA (-lid mulls in Idditiotgtal jlreCpi14tion bm~ dcnlityamp the bydralod cement paole) Ire 11$0 aoc rcd by higher hmpcnlture retultm in Iowa pcnneUrill1 aDd fi ~~ Tbe~ rempmllure aceelenled prlaquopollUOfI of realttIOn of PF A can lhorefOR c~ for phpiooaJ poor h)dnued OPe wuttures ilhin sample al Illghot lempcrat CONCLUSIONS

l1Ie upgraded y~em is an extremely ~ersalile and dau~ely inexpcnive compU comrolled clning fOf concrete In thIS cu IYJtem rest lpecl~ns eQll be cud und~r lin) ele~ued lemperalure cycle or can br Jubjlcd to l1li) predetermined CCmpelU cyclc

2 The nllCkquacy uf 20 C $tandard tunng has been hiJhliJbtcd and shown lu have IInle lllion 10 temperature muclled cunni The -SyJlem Uoed 1n be laboratory CUI abo be u$otd n pan o in full to monlOr UIC irIsiIu behamiddotiow ofstruttunl concrele initu

1 prA cuncrete las been iIIown to be I Yersatile and etllneerina IOUnci _erial capable or ochievini lIip -t1h low poroitybull t

perTnellrluy tlilsl dewlap I Icrwcr heat of ythlion iell is attnbvled 10 delay in t~ reaction or CIA

4 The err~ ofcootrnl c~1c ofCOlcrete on the COIIIptCSSive Itrength IQusity and pc11lellbility ill clearly demllfWfaled in 11 ishl or pres- JUul

VolJ(I)2002 ]0 2002 (1)3

Journal ofScien(e 0 TIKhl101osy

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Vol) (I) 2002 2002(1)) ~

Journal of Science It T laquohnolOy

REFERENCES I Woolley G R od Catlftra J G (1991)~ FIII ge Sirengih [)edoplllftu of fly Ah Concrele in nlln SIItl TM Inl(flUIIIOIlal Confece on 8kndcd Cemenl in conmuction W1lIy ufSMfficld UK 2 WainHlghl P J and Tolloe~k J J A (19M3) A Tem~ratunmiddot matched Curing S)lilcm Controlkd by Mieroc puter Ma]pZ1ie of Conerele Reuarch Vol 35 No 124 ppI64middot169 3 Tolloczko J J A (19H6r Time Dependent PIOflM~s of heal Cycled slag Cement ConerclcS PhD Thesis DeparhnCllt of Ciil tn~ Univ(nily of Llaquods 4 Bogue R II ChemistI) of Ponland ccnlCII1 Reinhold New Vor~ 1155 5 Dave) N and Fox E N (19JJ) TCn~fIIUn Rise InllydratinB Concretc~ BUlichn Resh ]gta~r 10 15 Hr1SQ6 Blake) N Tem~ralUK Maldng Curing Both _An Aid 10 e~rher Formn olriking Cone~ Ma 1976 p ~5-~6 7 HarTlSon T A(lVllt Early-age crack conlol in concrete ~

ConSlructlOll hoduSIr) Resnnh and Information Associalioll London

8 Hrrlson T A (198J) The Adibal Tem~f1Ilure RSot Cuw Slrenglh -and Modulus of Same Tem~f3tun- Cycled OPC and OPCIPFA concrellt$ - Cernenl lId Concrete Report DN12059 9 Coole M J (1988) Heat Release CharDClcrislic~ of Concle ContBining GrOOlld Granulated BiaSI furnace Slag in Silllllaed LarllC PQlUO MagRzillc ofCoo crete Researth Vol 40 No 144 PI I S2-1 58 10 Morabito r Barberis r (1119)) Mea~urelMnt of Adabalic T~~rure Rise in Concretemiddot Concrete 2000 Published by E amp FN S II YO~Ol N (1985) Te~lIn8 AppamlllS for Momn Temperature Rise nc Cement A5OJCilhO of JapIlIbullbull Rc lew 12 Cost bullbull U (1971) A Sipllf~d Model of Adilbotic Calorlmet~r ~ II cementobullbull Vol 76 No2 PI 75-92 13 FontSter J A (1986) ISOlhenn1 COltlducion Caloflmetry bull Conduclion CaIormelry Mcning bull King CalieF London Programme and Abrac1S of PaptfS Londol 14 grllsh SI~dads BS4917 Pan 5(19741bull Thermocouple Reference Tablc(ly~T) London

Vol 1 (1)2002 42 2002(1)3

Journal ofSlticnce amp Technolog) UiII J r~~

IS Ctnn J G (I93S) The PorosityofCOllC~ConclCeSociay Resewh Sernin Leub 16 Bnlish Stand d Lnstiuions (1983)9S lUI Pn 1L6 McdIod or Determination of Compressive St~nglI of Conuue CIIba BSl London 17 Clbrera J G And L)1IidlIe CI (19) MeuuremealofCMoride Permeability in Su~-plicsed OPe IIKI Pozmlanic Canall MOIWI Inlernltlooll Confennoe on MtISU~mtnt Testing in Ciyeni E-i L~onpp279-29I1)-16

1amp GowriJllLin N Cabrera J G Cusens A R bull IIId Winwrlght P J (1990) Effect of Curing on Dulllbility CorKnte International pp 41 Slt 19 abmI J G (I9IS)ThClUofPuIyenerizedFaeIAihtoffoduee Ouble COllum [mproyentmmh in Conorete Ounbili~ llIomII Telford London 20 Wainwright P J Cab~ra J G Ind AIaInri A M (1992) Performance properties of pozzollllic mortars ced in hoi dry environmtnl Concrek in He( ClimBtn ProoeedlllP of the nird InltrntoNI RJLpoundM Confenna Torquay EnampJand 21 Cabrenl J G ampndL~nsdaJeCJ(1938)A_Gu~

ro Menuing die permeability of mortar and tonClm bull Mazine of Con~nCI Resew1I Vol 40 No 144 pp In 182 22 Neyenille A M 1916) Properties of Concrete Third Edition Reprinted by Longman Scientific amp Technical 23 Bakker R F M (19K) Permeability of Blended Cemenu COfICICit 1st International Coofernce on the USlt orFI~ ISh Silicamp fume Slagllld other M_nli by ProdU(tS in Concrm Montebello Canada ACI sp 79 pp58~S

4J 20021)J Voll(I)2002