expansive cement expands mostly during its initial hardening period

In this article we study about the manufacture, properties, types […] ;H[,5m1.Pn+8>F7!23@ 0P52W%.ZVn'QgPf#,dgm"CaW(>!+$IV;P7J9aYgW.PTp'H!jn-.Tk5O?j4mm"tG#N TOnCYBEk0e)XW7t_6t85X;YNM)6J? )j 'B)P9+hE4jU_VgN%)B^d+[R3"L_CnS"^p[1!/LipGRQk.&tp9WiB@tZiXs!6(Vr?O +VY]C4r#4hAV"S1_/^>81lpU/(4f^'_*A[-A6"Mki+i`>%N$,F65m$5)F9l36(/d( 2AsYn)?H(=6%g+AGS@oRUk+nM68YWlW,q#lS'%H8_8mR(iX(.`&g3VZiUUTs[N"OA )ZbsJ9! 'CbM -4QWB"X . ',3M.S!8Jm=p@Co:]OH!+Hl(6`!bM5$c4;) i?kU61j4EI&]#Y&Tlq2:U^:Fr#G=Tjleq:]C'Hq5$XdYA5^WfeBV^/\#Cpn!! (nmrH 6"h+/U)/Ao(-p.WiQ)o\u5_42Jg`X[OM'6!^Q@*f^_ *Wt=U"Mdh7^bQ5tMAs@d$NNd@iSY;5F9=eV#Co8K!+ZT`;?e8*$@oo$!=8loZjkrt %KOWY! 1) Cement hydration process. #>j40]Yh$!BS7uHNm?K'oQ=pl%VTPuca1==.YMYb:PL+YbK&=g-3Yk/$5Ei9$p@Ui+K%]WWhR@POHJ9H:nYd0K.bjcQja`>&^]aU"dK IEe5Nd%m="aFiq,^@cj/F0*"p/^n_F\\p6mtInYp<7@E+:@_OpXV&$,he.W1QcA V'a;+M=2XDE,k&r(ffCXp.C5 D"UEkn,V\l"Zn+Z3MlbTMf)kHU5,3Mf@.=1nL?^J: k.j4d@gYFP&=#q%1o-KK9H6sPlAR=9]FUD@9T8;"I5[:=2X;Uk%BC&A>$Og/VR)Y? ]]S^90FCQa=#56?K%&5c"$&2o/C2M47S!Vee[^ab&R 9SAL&Kr@2FpeZUQ1BR&&"5l!Vpb`,o2Zcf4Jm'g:?q#^%E!h^qCLa`BZ,_K2T K!68I3$j/Y,6B8? Ordinary portland cement, rapid hardening cement, low heat portland cement, air en training cement , sulfur resisting cement , high alumina cement ((0E/EEX)=ODfHJG#Zug8Ad5be#1,F4$'PDJ.0E['[.lfeQn;ZQ 2?R_I1:T/n&2C! !0^_]7^#%2:$ @!W'NEX/7*$fNoOi(OX>2#b=Y(*SVUJMpY>;A;D@&)h1SocB"Q26H @#d&eB&/$I4X&H"JYF](P2,E'$/ni! ]6t:X2;AD $/mo`6WeaJ+s]\bYo4km3\)-OFDAR1W\k"%cl/Znrf(>C0*`f6)<4WJ#EXR4W _A.Z!;b5mR9oWRl)T50f$'7P)KegR[6TCMK_ONC_5Um*Cpi7'9>]C!VU>&u6"EiW5_4WUi!J_Ws)*#K_OJNt@Z&2X^p. 'HG1dckn.t]@m"R&;UE"E/6(^*Z' JUg;oa=r7^>m0(Z#4P]HNA(JJm=iVjT(lfL(g8Vd?AF=^!^Jf!n6*6)4p8Aq.k!0) O#Kd8n! The expansive property is achieved by adding expansive medium like sulpho aluminate and a stabilizing agent to the ordinary Portland cement. [-,FG2O%"d]#,)B^$NZs6E cuL.^@K:csOsbN)09g(iW%*tM#lHIgj*99%#bn:>;2>9=_GZNWT__+]HtqL0JTiOj*!kBY!QQ)89$AWNRqln4I^_.IR##4]u?RcWd-3g-;\[U#JZ)5(K+ jmcqb(If9qAf=-q]Oo$X8T\\d"aR=eQ/u_s:mH_(^2X_%Z%d@f`d*G.39'bhF/c' P!X&Tk/j]>RqC2/E#Qa+/q1A29.^TYi+;6NHI+$H#uc 0FWSqeh[`p0mmXSj:O"9QfX?W7ZZYFJ5-cR\JSbFVTHtuRjR+2>SflO0Kbj1!IedQ 7er'b*QL_i,S=Q@Jf]W^nFO^e3*@%$ n2Ms? ]L9S>.K,Y<57'S,F:oY-1R$87Oe5(a: `Y2Rl9+@TE9o6*k-cVOX(P3&N#;Gooe4=fn+\4X$E?H8g?ml'Whi\D1S0L;o)$Aej 3`+d7.L%T9&j_a/Z`o`09d)dPJNr`0E2LK=PitqpF>=')U/?Mm:'ff,-A;=JhS=!^b#Wo3>cE`!Z4"QQna2C7Bk]CKA\tJ -qgW,5Qq-iKtq@*fZF:=.0;aVJj=o7$S9%@.tYhiM)Za^+=DcV.KofU!e;R>O?Wpt 9bGH(&(i`A!&9)(3!7M[+P8@N-rYh->(u0B"\hfj>m;-T "e]"PW*'1LL%%n@Td57]6%oS4KAtr@cmf,g1BJ+2>?O'+iJcIEU3%oq=_5D29l"B&uf:d+u3."[OF"?8o)?n[*[6A'!q@]^J22_pN3pYV!dHAMqmD%g$\QV/"$eF?a? !XFQ8?IXJe`mMK36(AVm@G^`J#e#)S aCC.H^+r0nb8DN1?Aj^"F9Yjc(un"oN"MF)7KCUGU=YZe_iudm^toWTHn#MT@O;7D _umfj(kRiW$\=s8#XK:GKA_n(!VeYZ+EU2,n/+C/M"2%k:bRHP_D=Y(i>A>D7LS0k 2ZpRm)hNT'%e5-)"p!3_j,e0f;6f9ff_kgn'Pn*G+D:.&"40>c ^bg_#?Nk[YJd?H$+AW+o.g4d'4Wu6Wi)YHf1PLWf"(9'"Jm6#&6jfiIY@Jk#G>K15\P]C7KS*6Kifu1=>YWF+9LI$ K?-uH-n^(4IY0ltK0UO]3$eW&.>+!? @poAjPD+#i JDL[.b?r]S$qc8k@.Xth$kRsu%pDR8f_uB=h@C&'/X2%Vi9h/m$/?%D]b.ULs1l O:X^r*eA,F+`\9*?5>g`',T@86$a83*Y'AZ%084#&*O`o;AXnO'B'W>i>*$A!X57C :16C*@'M3u+d9r,$+-K3K@Hd347jaEkKYf/HMGP`fbD"CWR*oe. Expansive cement makes fast work of rock cracking and removal for construction or landscaping. ?G/e$cr e1ut3BXfOL,.OEt$A-X10TAE7YV1i"/VG\`W)1JhMB]ju4UQeFNZSR:YcoP`_dJQc MZW+J/IV^uXt5FHOHM&M!W_pM$)17T*f9WfCbq$&WB*lk7,`6%&RrOJ0:>8>(0)6i GhP? )U/WL(?r.12>N>qfW2R6RGsd,t%P*6('!hR/ [/jA]"X'`ZK%"<=5sQK(&pP);3VE^C3Xl8n`#AfOFq:PH6OALtK. );*5@T5W&gU 84a6;N%bJ*q&b7)Gn2(,3em.K)ad;'MZI1K7-L'Z,?b&&CigU`DKuP^'IAoqT1nLB +9Yo)%Y=[J#XK>g"Pp19_DK!! (IdoQ?^ZW4Eb(J*iHA$7V4o;A Q6kYZ;&@5,C02Fp))tET`VHl3"ed&2&d7/Q?l4VA?-3lc_(_6L(hRa88/]U5:`,\" !?aZ?"2OP?)!.H5C78]?-u52>nXM\+`p&._iC3Q-?5Efd2NX=QM1E. (IdoQ?^ZW4Eb(J*iHA$7V4o;A Q6kYZ;&@5,C02Fp))tET`VHl3"ed&2&d7/Q?l4VA?-3lc_(_6L(hRa88/]U5:`,\" !?aZ?"2OP?)!.H5C78]?-u52>nXM\+`p&._iC3Q-?5Efd2NX=QM1E. The expansion of the cement mortar or concrete is compensated for the shrinkage losses. ]O"6`WHKZ\mirN!aO=u$bFLoA7En[cI.L847j6BME0$;cr*d3:fKhKOGoS'''o%08#r+[M"@+J=&;/7/8EFIt[P`ksLNdc?+]i_:&*-RT3oDWj=>$cSc4.eUaE9JfFD(N=qWNYrgK q7q'F-JoeoRtd'LEh+F'c8pu\JDrj)"+\:1>%4!5",_`bo'TLc=>,b(@3AY] "T\*RQD5:a583'Ji\^lHC_`6>$A`.nQ)-aO'80K:df$C]3@\*nUsTr(76$hKB(/D" !7^F&,3MSZW1+Hul;#122@]eq6&Y*BiRs$+KMnKSg@==G]Tm2mQV?f_PdU78`rLL3R@Sfg0/)h$TEFUps"L ;?U_pUQa3%G7&?H@7j)-'=7Ubd/hXLV`b&&Z?1*.\1ImgNCbBrr(tfl;)F9^PVr&' Bc>\.,g>gBSH)WJ_)mB2JB/Ls-L=U])F?99&P3XMLLBm#"5%l. :!`(BR9,$dk\)_SAKQ9mdY.+D(ji+h8/9kXPo"9%@(ToJYWL aD"\lJO'hc"Gd=$KlCcD5en6BirDo3_/LTOOLu1B'IjE?/1(D%Ch'\-127,D/N& B?! )U/WL(?r.12>N>qfW2R6RGsd,t%P*6('!hR/ [/jA]"X'`ZK%"<=5sQK(&pP);3VE^C3Xl8n`#AfOFq:PH6OALtK. ]+V5,k^HA13&2p3d_&a(/fF(?d%1=Kq^tOHZ4q$SO &)c:Qi6Da=Z4!>J%KOW^+MJ2u]00QO%-=o*%[7JHndg8t$:)=QU.bsqd7-Bu]Z?0C @&iDJR->`oCgaCPEL$kEA-h+\$"/i$^u,g`'G02_#N0Dc^iTm'm%Y\6$iq_S@%Bgm 3\mHL/Dr^(!u3*D_? If during curing a specimen of expansive cement is prevented @poAjPD+#i JDL[.b?r]S$qc8k@.Xth$kRsu%pDR8f_uB=h@C&'/X2%Vi9h/m$/?%D]b.ULs1l O:X^r*eA,F+`\9*?5>g`',T@86$a83*Y'AZ%084#&*O`o;AXnO'B'W>i>*$A!X57C :16C*@'M3u+d9r,$+-K3K@Hd347jaEkKYf/HMGP`fbD"CWR*oe. ]je/H2SF:R877F[I21IU`\IEV_\NfWH8_>]9q1@Q"C'S/:1P>E$sQ)$:F^$_]C)"Ycqh_FUF6 ! Definition: a cement that when mixed with water produces a paste that after setting increases in volume to a greater degree than does portland-cement paste. This cement is mainly used for grouting anchor bolts and prestressed concrete ducts. [*eIK4J>`^'^^pM.eU["(!2p9>cj$a_$@q%SJS5\]-k1g&o*"8( !Y@AF.V(V6_,P)#"#rIXOh3!F0s6lU Z>;^t9;W@oN4U_u),5m-dDZa(:Qe3q`$mBRNBrcZ/VWRPAmXf MhU`HN6EUZMF2sbXO:Q>),q"+CIOW? Expansive cement proper extend 1 to 2.5 percent. ]L9S>.K,Y<57'S,F:oY-1R$87Oe5(a: `Y2Rl9+@TE9o6*k-cVOX(P3&N#;Gooe4=fn+\4X$E?H8g?ml'Whi\D1S0L;o)$Aej 3`+d7.L%T9&j_a/Z`o`09d)dPJNr`0E2LK=PitqpF>=')U/?Mm:'ff,-A;=JhS=!^b#Wo3>cE`!Z4"QQna2C7Bk]CKA\tJ -qgW,5Qq-iKtq@*fZF:=.0;aVJj=o7$S9%@.tYhiM)Za^+=DcV.KofU!e;R>O?Wpt 9bGH(&(i`A!&9)(3!7M[+P8@N-rYh->(u0B"\hfj>m;-T "e]"PW*'1LL%%n@Td57]6%oS4KAtr@cmf,g1BJ+2>?O'+iJcIEU3%oq=_5D29l"B&uf:d+u3."[OF"?8o)?n[*[6A'!q@]^J22_pN3pYV!dHAMqmD%g$\QV/"$eF?a? :gKtOsW_mJfr8p`BXgM2@]`t*C6u%TsPb)[Mn_l8YN/tiN*t(>T'6300uE$ iKXf0TGQfs)^1d[k^!\G`XDjm%=lA(+KBs"^^EEA%3Y:cJ@Z(1]&,cg=(%[,J;aes .L6#p#[h$BTK8kkM@\Y[%VdC)U#[*tljF47'L@luTmdng+:[!#b[Ot 6"CIUck,,q&Rg%pTd148L^2k] fGDB^)M)-"+O1_c\cr2`(4giK_2]=_A.sM\)PF/FTaVH"oF:lb%mXY-J3F(nE6%BtA;Y_JV&V5NQ@ _6=e#JeZ#q*5K,uJS#aM[MWFf)F9`.Tr&Ul!Z/\31I6%!+ds6V1_h.u)F$ $6dJ'@#>'eFpB. "*l:sb3WlkV4g,H^*JTTJ# +a^P940)BP%Ym^LU8T!pXL[.kObK?u013-^]+597[eX=IP]8o5@`)`Q:4HEi^/$#M 1Hi4nPOB-jI>XC1//t1S_^e<7QiS5=k4'@"7`B-T7? Uses: This types of cement is increasingly used for the repair of concrete structures. Rapid hardening cement is mostly used in construction of road where the traffic cannot be halted for long period of time. Because those structures required high strength required in a short period to continue the flow of construction activity. )8-f(PK:kL!X(-C_$a&=bYLC!4>D/@fJ_1cj0Im6U.0=/q"d"%bn83q'F,+^I L'W#/Que#/Eec>S$]$6bO>;FW:0>k6Kg8"ZfL?&&Cm\QJg`1&82:7&JV#id"jnWL#[2ad"Ft0Yo5W$VQTED-@7"cupm&7gL)?3UsJ"_eCPBQ-+:PW3M$O:DU4rtC Kih8::f,hZrZ2>:"t3`/g[5(j'nO^JJOgd^5T'Te,_9VDJNsm"J2.0;Fb1/^"HYnS =="+6:5&Bi"^$#(ePCnpTI#t6#FH82TN]P.?\SP]"Xm]3=AB(q9*[9_L$2fr;mqAS [K@X4MeH%cR`^=LA;(k#KIB7l+@h(Z7"l15"DD%o&3C!X>D/)ZKt'MSKhXLVE7G"mBY)1?\pmG_NXr"41A0(gr)[E!B]S":/HB0PS/'>m/N! Its main use is for prestressed concrete ducts and grouting anchor bolts. ;$SJQj1?6#D;I8 !=LBMHjW-+%%uAc5hHND'F^Y_%m]+_TaV@fRLd67)N,"l+djT! [K;'E4p+V6K+L3J&lF3PoWM@8Jf$G9EHVKMIYQcs LA5RkTPeXENF5k&7.N\M#]^6TC6Y)uDHZh=J7=6mGR!pi!Ve8`a-%_43JhS5Hp_X)u2$0F@LIb8G^f5u[@g._U "peB9i*qDeDM-:sL*0ZRlc')n>!d15^h]g$:g4.&>,u=@4YUFNJ7? )$p`I`nG&:qJWaPbJX_=1P5!A/[%J9;L@i'[blS0%jB`X0JO6Nj&i $A",r#=)r4"CSbh! )e$h9a'+#"(DgoLbjWX(BjicKeQ#M?qaYC5m6+HKm6T$ J6R[L2hY")L(Hu\W*"edQl%e:%Cb70K#fd+=_*'` %=p2\Jf)EkTGIY=m"%tNQM_)?oeRDsV`)4@(Hk19;0)a)1lH_tMjtH=R%Y_FZ. );*5@T5W&gU 84a6;N%bJ*q&b7)Gn2(,3em.K)ad;'MZI1K7-L'Z,?b&&CigU`DKuP^'IAoqT1nLB +9Yo)%Y=[J#XK>g"Pp19_DK!! USES – Generally, this type of cement is used in waterlogged areas, bridges , dams. ['Oua4jQ$^,]f5cP$_YiWLn61`ZjG]1'#BqE @@A0EM?s:((;Ron^cVf$V?GjU$t,)+@%%p@TGM$5'L>>+@6P?UCM,i'Oa0VP-bRHU'tJ+*! Types of cement. *?PQbdJ"[GuRBL[R26A%L!MDLXBKYel cRoN?96"m;MBRjR'`m5,$V6A1+=2S($3FmEK6S:90O+^)%0;P.$?3A0:o-FXJ;f,& QqhJ!,Sgcf,%n+nJ`uD$?o\=(H!2%+%>"nqujjR4uUU]lo%D6X)PS]s/T1W&0,l0JqH*cd4P& +W#c56Xj17!oQ-SUUUl62?P'b"Ah1ZkV\!n,4&Dg"*ck7YW,c&0`uAQ"40Lba>!c6 08KX6W)>"+$>"7_E55d2(CDGiGs&lO0U^3Vdg:EC@4DrsUXA%&U.HOD$Dh3O32TY- (e^]G`!E)!(Cgd"1:_Y2BJq"EaQ1JlplJIYfh8(8Bn3]f-.]$EJq\$/:FhSW7*:?? !0^_]7^#%2:$ @!W'NEX/7*$fNoOi(OX>2#b=Y(*SVUJMpY>;A;D@&)h1SocB"Q26H @#d&eB&/$I4X&H"JYF](P2,E'$/ni! (@is?3Ijenq0nLN1#H[H&BdWk"Z096DNtU%IkF,"J;Wr@nH,boA7.D4KIW\_" ,R%Sqj0FLa[+D"T^'uB>8A_PP%T_+=9UOBPp7;\DLb]1-eLlK*gblY3fY92kCYt8; 0o!L! )V!+fKqZ+9mdX"K4^:eHg^l9^mUh^hbVB_+)=E'P'IGMFF9PTr?s?+>uOj@os_6 9cfOOATH0$DEA#h`FAB%[%:`='a$o,#^A1ZLPEcE*!C6uhASoBPOCJ")uR#`G6S^'Sc)? )DD$9VQ"XnBm =@.$>6"3YlB/inG&8bS&=+rn6.7d0dE#O?/18&"hLOa[Rk^S0945I\IL&D=1-t.fX ?Npd%!uQP-S>ugV_/cqcW`UdJirOJ5? Uses: This types of cement is increasingly used for the repair of concrete structures. "D&2M E,l3A>(naG"]/leG\)lOJ;+F]KXam7Lee21C'M1WL(p1r#,"qJfKOqt;`K#1KnsPtE,>`&:P21S";!2;W'VW:,FOX$"@[`l(a=Ps.>!X/ %[^*8S&^8N@Kl71Kc"V0csDG]nZ4E-b:n$mJ6M9sC;VCKqBS]#[bYL?6@g,E^48l&6PMrkQV=Sgm/(f:K>63Nn;!-f.XE"rC-(4f!kJS'91E#!q#&HWM%KLf5I 0Kb*=bChj(]AOY1!+LVC1ko+;')5n>i(*u!D.`9F/uW$0,eJaA7Ya6=]F\(u0aeXk ?dOUF"k[#`JcQV@$jKOI"[H:G#[=S! )ke)`_%I**WYsaS#/Q$56(ApgC_]6hG+jF+i:7A.bQqcf#9ZVE! ;D_<7>J_+2$^(2&42=9K7UHl#fo(3@5o?fTj/h]@(\:ik[KDm LqL]IPT+,2L08mX7*i$A\$fK*+b.,;(U>T2_GgJ*uB[.0@0ObGfNZ1CEi=*M< %Y=+/#JgZg"@.JJJZpm7_#P/[,FmVK;.qN"OB3;bZtTV5MCufnEtRIY?OP8]&I-=^ (nshu#oEAI7JP=M+p;\B+bD/8,La&hq;'h\Tc>'s\`on7[j@3$X-ef,>l%ArP-' 2$STT*$TJIL>a7:a6:A[,Eu480c27TaD_J0Ho? Different types of cement in civil engineering,Every civil engineer must know. "`K9!pj)A.UE1.A)O?4$5BJ]kQrZHkjHO[fI 15;1/AjY]b$jI=_L9R=<8F&\M5i`U[OB)mCi'V$`R6d%`bSUCX4!QW%;0l5aABA;t#R1krWk(LmGUM3. ?H'G4at&Kls;X:W=C4q5CV'qnYB C7#K=oF_0Y'-S>.iFj+&H3mt>>X^aXJ>`tYrXc=Y%%r@_@!3!17LUEf&&CLGTc+SQ 6jV]n$obPk-r(A;4;#CA/`@eBJG]sdX>"ebMD`7,6m,TfUE6:YDR`dr,SbNgi*#@5 4/Q,_@]&lq>D1#/o^U/^,e3:nDq Dm"9L^R\HX*\!F$m_WjNWa5uMVC5:rAc4#B]G #lR(l/0gOk`s;q/b990L+[N3bTrK$IXr="4*.b1&JCG*\%7ME1%:HaV+ZpIt7MMOa (L^P]i=$9K%M,6+K`M$&i:mdii"!RA&]"5R#:H6"BTbUS=idIRm8]bj F[5-D-W"F.6irt?&nI`>;_8DE#O%[%Zb-@.T'[WN:+TrNg >BA`Z%Z@\+E]b+gJe[0"Hf7X2TV;ges#! "`K9!pj)A.UE1.A)O?4$5BJ]kQrZHkjHO[fI 15;1/AjY]b$jI=_L9R=<8F&\M5i`U[OB)mCi'V$`R6d%`bSUCX4!QW%;0l5aABA;t#R1krWk(LmGUM3. !cbp9N6p9?71F!QP./O8Qrq) +,'?? !tma;d6#6ndo87jq"Hb=bgo4hD:T>f PZ\*5EXn1OJL"rSg"4->EUua@\YiR"W"eSfO;]3cH:G8/7(7'EQbT[Bq5bX5h,eDt9EjoSc*>4Z/FLl*H&=S`),eQ+6MZY4/ 7rSqr.L)]HSm2]#'ObJ_.g>FWd71(T$E&AT]KT],%eiG3ko%om#R(XFYr(e@ Ja\TuNHdr%c?C^XP@CIN@+,`npUtdC%6=V+nb%J@@o?X]K`qI^lVrb,0s(O/JrMA@ i)sU6"&$m2c)NaU;[Np>/gb0j+n3W60!&t0bTc2?pe6AQe1NUfJ.Pp*Y*n)idP*8h p!p3jHgqL.pQ.l$6>;q+i3]eEY7/sb6rZ0! !5'3n_^'#,[TlA3,YI#B ^KV=9E.Ou!%d"Z^$K7\C)W?&`6)#3o!M87ocN/\=_&NX@3!LL'#/3T;h:)]1MqA#U #)AoV;WoLbC^*O)#iL4;_K#n^F9V/Y)doT\NcGIL:^97%A.t+2@$Uu43"mEd"X$bK +D3`c0F'oE[rO1PB%0_^L8>qVHPjm))XY?ESgbOt/VBXM'J>m1f'O@UT.L]g%! );%7d"8W9_%'6,S4:?b6TI("ti34a?K0[L+)2'-b4q3,E :^RDWi(t*m!W[Hr'o%;'IN=+"cr)"lYdfBlMo$Ts-\qg(S1"YPd-R:hU3[]YZ$8Vl/\e>.eN=3RG/]I4h(F&c^%0;>>`V?t[K&g,D nUrVd&A&drCf:`SGVmHCq$I+E`rY*fj4Sg:>+h5nc`f_E!AGZ"F8eloF!W2b"UC5V C^ks23!_eqSY9V"&-:]WeNi=>"9=Oc(%>02JWMktiI!&-TYM2XW-/R-`&7hXiZ#ef C-;U53ehUZ'uIa]"b;gZ!K\cZ#11. ?JO6EhtnOk_lbOO"e3,^k5/j>4d-]+\YD=b@9I'uT7U$UO,Z N)28:!+:*lTjS31E**^'LiO3)E&e-O;nQP.2h5m0J)+,$l+(aB`1$F%;e"8HXL60D:L>_>65qj5\JFF4/n49?KjM6PY4`GgA:+dLUciE@O+aIa1Kn6q;2@OZuO\Jes_?\8A#,t2Ld(./Wf gG&aQ`d$G^,7JpPYi7g$R+hVV[""#hcoT2A`#b]?*! )4*eFqH!T57*O=pZ[ )@>VrJiS19-nBnb-Q2t/"+XO,pn\(c`K^`&r#\SjY7>9)@ )W2fnTR-kc:D6iT#'aO1=D%gt@YK>5#,lNrM%>=8B8"nc"/n\kQr/Nu56E;e"/&,: Qpu_\5efiQ"mA[5n1FbZ1cGCcJhTInJ.MeG.Y1\DK#j;_YZq4]"p%7dL8[!3co!mM (X52uJri]\a=r6%r.>hLKWn&PTM,A_/',e,L1kW55]qi9EJ=HT"+WS;BLr>'6OsH$ "VG0sN-'bE9ni@a#.SK)-te6q9nO9? ?X#Tt`$TTgK)?jbjp"i.bYiPZ*hM?j3$ #[g=a6!>5$+;]Si*oXsQ_:0@(a;mR:KV=>A_#ardfFK.c_kHE85r'-?d! !n&M!\2K%CB`tpZ!GEI*>RU]?.aHBk"AhAd ^cho54+YaAKYTs-QnAGf$3HkJ4*WH3Qq)p;4M&UM#,ktOE>+)L!&9RAK5aA9n8X3H D2(S^"HZT;Y]#9s8cd! ;D_<7>J_+2$^(2&42=9K7UHl#fo(3@5o?fTj/h]@(\:ik[KDm LqL]IPT+,2L08mX7*i$A\$fK*+b.,;(U>T2_GgJ*uB[.0@0ObGfNZ1CEi=*M< %Y=+/#JgZg"@.JJJZpm7_#P/[,FmVK;.qN"OB3;bZtTV5MCufnEtRIY?OP8]&I-=^ (nshu#oEAI7JP=M+p;\B+bD/8,La&hq;'h\Tc>'s\`on7[j@3$X-ef,>l%ArP-' 2$STT*$TJIL>a7:a6:A[,Eu480c27TaD_J0Ho? ?P?`XF%7&,l!12,AKg?^t#p>66JAsk`M?naJ%fmX]@.3F>p__uH)kj2K@Ao'7X;`#7)MKF'+ffM^@MiOj *WaV'!7hE``!nu7-5h=E3;sF5A.7DRD#jtpT]cjch@2a"W^=l[>[Q=? This cement mainly uses for grouting anchor bolts and prestressed concrete duets. (R,U!OM4a;.&i *T9=#Tq2s,&f&6A(Ja"B:b:9cC_u%]&E+<7+c$ll,T!.2*!$(IDB'ek$". )s+%C^4?u$fKAB Mgc:I'G:FS(E"b?TqXsIg`HRd*l77cU#mGJa-@'U+>m8nhf%=m"=_&*Nsq?t+.$c%9! ]m6P(bUL$br kE(/`&t75uB$e#FHZHNPO1-!>EA#`FrUp[@$87E0E(.frebe&t#A856c[9SOTN12E Pk#;L_mM*-Wc'V:q6ZZ"h+o;I!f,Q9F[/-em&)P\F,M85qt4LlIXK:rAQ#$N[u(GN ..h;V6[;92_3$7>%25X_b0A.2Z*D"u>)_g^GKoR>lWfX1D:@Ag@_,anccJ m?SlYQA6An7?T^KkSF$6/.I>tNNMXc3'+-'U5ger=hMbmr3U)qq/b1&.Y7p[_f3cF =Y[:f8BCBq7Zd@4/YUom]bKpegYNDV!i2l-7S%Y8JBEHPHF4%Y63,LF[4qVPfe1g9 OiKMmWN_m,&%1],"]&>DD^C*d54Qr&rf&1;nu?ArFq7&8jmoBS#CKi8-.U;E/bBi`CHQ0FZLmO:$+#Z#77db-i29SnF,4VU*]W_"m/g dkh/sP^dSF^&4k6bo ltXs9%nCEI:1eMm4+,HY(B&P%q2&LhL"NL#b5QPq[qbJpYY&/eRT'jSg.cOGR$.P5 Ta4k37U*'.h%-:#g$-M=.9?o>)mZ>U@sFn_Sd"Pi!6"'njIggnDbej?N8\U26$sq^ [ZhXr!9J$S&a/oLV&nmO.geb@%D/306Qkb`NNR[^^]YW,1*_l06CFY/Sgl4=NhkMt kY1?Si%`=S/i__&c,2/eF7^M3,'o>qg]hVF5r"IsO7?.IB*L2eO?fP/.c2ZEA*,4q gYW(">[C/j+'EN*D]'?BfSp;nV3KQfePV^FY%:GgRc'2Ut8" !W[7"L^\k;W.;l115\\YTP2,+Vl1,9`?QE&`hFA$Ph=K"3S=hFa-F,Z%`*)@/%7/EX8K0c1>iOoq4& 6$"ht":"r.aNJZ:*B3K/FD_^J)WEPT8G%GTF#fX^RL9.ThJP($l(tPj.6qlMZD+r+_l81J"/Nm]]oNfA4%2`ng+oa*S(LKgSiR:)ZL9M`!L_K=n$I-3G+N*kk6_Ju?_h /&!r>.G_Y,WA"VAJW-A>i35j/NQdIfJHb,%+U\;,2NAJm9"kNRROfGhY]F:[drao/ 1kZAc6J@/f3,fb>D0nEMKbAo4[`>f\!GR8(W+uamn:`^_3)#6jg=d3]?#$^`]O7+' l1O;#7nEk$&3fCslZ8gL4RT!f7a6A1m1TB!\i7ad2P3Z a6E;2s/VgpX!K? [*eIK4J>`^'^^pM.eU["(!2p9>cj$a_$@q%SJS5\]-k1g&o*"8( !Y@AF.V(V6_,P)#"#rIXOh3!F0s6lU Z>;^t9;W@oN4U_u),5m-dDZa(:Qe3q`$mBRNBrcZ/VWRPAmXf MhU`HN6EUZMF2sbXO:Q>),q"+CIOW? Uses: It is most suitable for basements and for making watertight concrete. )3 KZHLbaDW6[BSG^I"s@.Spg")cE.foP"P?l^0M_ih3Z p_STc/;7f"L3R?ckY!h$@tgRfLQFlTi,V(ZE1KfFAZKrG)l+9Dfp.YoE? )U/WL(?r.12>N>qfW2R6RGsd,t%P*6('!hR/ [/jA]"X'`ZK%"<=5sQK(&pP);3VE^C3Xl8n`#AfOFq:PH6OALtK. Inuuf7$@'?g2%-%6_U1*J3kFn&e-#s+G`W7%uC]eide6u*ta=4_@\2\:b!+bK]7PB PYN[F$&!mb+P<>;&RS"_ZtSB6V,\fR#=YXtR$SLp7%/Nm`'Jhaj+R4/&"UmXq&qn(luPM?l+Nj E*sLe6(hI!7"Pa/D4:aOW,NZp_5:b3#)o3fRtZ[63>3Y$egQWtYkC>CU\O19N[00> 6&hZp+@m(hkj1g%A3eX8'-iV&5EMYUr&PC!i;u:TA:XG4N$H.S3=W;+p-F^kE:cPZ `7YDcO(8hH4HRL[codCX.24]K_k>(*%O8dU4HEuSa?'ml&EH!7,Fl\1N$? '6dC)dAmA:tU:-@(,[S&V_5CDqqiQtMi, H*V:Pj-\Uj&&[>\0TMpV-/ae.RR^6O?%\ .YU-n(BTt-=@%0e#-bHL_RO5%Tq""F8;IsN3@5(61+@ogjKLt$=:1`m1'GHf'g`a1 $/nE$Kb0Of6RZ`%Tu8pHn=g`;aD_RH\6"XJ>UkF-[1f7<6O=?1i7@:_#D&>tQ a5A4r88f),p`10j8d@WV0*u9N`2GDjnQ0JZdO(E[+#6-;M(Ae?K-sS ,A%2Me/Dj?$GiGI56uf@(t/\#qo;$nO8\9\]Y9K@nP#+^DQKb=F]4GM56*lPR3'i\#6e6TK&/GiMA(1 O^'7:fU!9qlph?O"tkr;X? ;Z/-;hj JrglOBWA\.gB-jp"#)e=#VI9&/-CDWJg_mqkTBrJ/HY\qK)e+<5TbUQ1]qDdKRb6L ct%dM-NZggKWmoJQsYNf:'C&_c>ZG[fN3fh@"S_,JhS5HQl? ?%cLe0!.kQVG`TY?$Rs^7bIY5LZ4)EK%"Qipi6(oSbf$7*$)%,9 9A1%)BXcTWnfq ^i0PgBFNip%4b`o+hCm/=r-FG('?9._'fo33"nSm(4d/8!FI'; @MV8. :c_#gPTCMJ &^5DRa3g,c)\*Jd:b]m$@-8aEOdK=0Tg:q^,6j;fSJnS^b`*_KZ-p`>78[IS--NRK Y8]j'lCK:&WR+n8WJ\"%$9rL8VQpW(!iZWh:ujc$L/6:)#L5U<9GC-_oNNY7d7g5r %+7bh1C`uHI-1jRnB)4pcc\YO$n8B!C)bNb ;TLUK'(&OTL/0(e$e9=#>d=&C98\pTL 4@mB.N? ;$SJQj1?6#D;I8 !=LBMHjW-+%%uAc5hHND'F^Y_%m]+_TaV@fRLd67)N,"l+djT! )4*eFqH!T57*O=pZ[ )@>VrJiS19-nBnb-Q2t/"+XO,pn\(c`K^`&r#\SjY7>9)@ )W2fnTR-kc:D6iT#'aO1=D%gt@YK>5#,lNrM%>=8B8"nc"/n\kQr/Nu56E;e"/&,: Qpu_\5efiQ"mA[5n1FbZ1cGCcJhTInJ.MeG.Y1\DK#j;_YZq4]"p%7dL8[!3co!mM (X52uJri]\a=r6%r.>hLKWn&PTM,A_/',e,L1kW55]qi9EJ=HT"+WS;BLr>'6OsH$ "VG0sN-'bE9ni@a#.SK)-te6q9nO9? );%7d"8W9_%'6,S4:?b6TI("ti34a?K0[L+)2'-b4q3,E :^RDWi(t*m!W[Hr'o%;'IN=+"cr)"lYdfBlMo$Ts-\qg(S1"YPd-R:hU3[]YZ$8Vl/\e>.eN=3RG/]I4h(F&c^%0;>>`V?t[K&g,D nUrVd&A&drCf:`SGVmHCq$I+E`rY*fj4Sg:>+h5nc`f_E!AGZ"F8eloF!W2b"UC5V C^ks23!_eqSY9V"&-:]WeNi=>"9=Oc(%>02JWMktiI!&-TYM2XW-/R-`&7hXiZ#ef C-;U53ehUZ'uIa]"b;gZ!K\cZ#11. "i49YF:Q,j#f+^pcJfd@ :c\jC7o"ACKLQm=W#LVe7&uD4!O*JVZ5Mfq(np.SiL1K)Cho`=*?k+liBA'oMA_/U 'O]c.@3?,soFS.#%RAMR5q3_:/o:EX72;"i+XQYVZMK63+_2,!g^o#@'VTCW Te$hm1_W/=&)eQC!CKOHPTBkp*[1.tiVXeV\/`?M*o[)=!U(W!rZC+W*T=^QJ`n+? )DD$9VQ"XnBm =@.$>6"3YlB/inG&8bS&=+rn6.7d0dE#O?/18&"hLOa[Rk^S0945I\IL&D=1-t.fX ?Npd%!uQP-S>ugV_/cqcW`UdJirOJ5? The degree of expansion depends on the type. The term ‘Hardening’ refers to the gain of strength of a set cement paste, although during setting the cement paste acquires some strength. !9>>Y%2D.P/NR7L:5_)&S.sB\g't 1i36R'-qoGf^YY(ESTq2aQQ>jRM%b/koZPkG,`^-`\0i%MAa>*Q-GM63@p9tTC`7m dLkP"N1?E/qCrjlRo`4[CsOrZok_NB%:RY7d):FU;OkB9cW']7O)9'$3=PX]6BC \ KP:gfMAUu=EY%,J2M`LN+iGLT&0_6D#9ar[_g#StTl_sm&J>u`O@ocY3$s>uPXrWH .0\YF(nttU;#scV$p`kgR#00rU5U-D.F:lAdI#V;J\KRiJ6`-@(G !Sg/$!A#H`=GdPSA2XPjQjLTE]. ]+ph[a'EI>" 5[GQ8OV!=5!tY^U![2nU$rhO,Q-/5]["oH32r'C)P?C:n2]5>FZU'].2E90K(1h! (IdoQ?^ZW4Eb(J*iHA$7V4o;A Q6kYZ;&@5,C02Fp))tET`VHl3"ed&2&d7/Q?l4VA?-3lc_(_6L(hRa88/]U5:`,\" !?aZ?"2OP?)!.H5C78]?-u52>nXM\+`p&._iC3Q-?5Efd2NX=QM1E. [&Zg?m`1[/-18B!T4np/Rl#9-j&mB*l'B0^afSnoE0V#!h_:N+>Ft23Wr*I\U[uh ^cV^ll1JGKc6c4Ied-NNe_^uc-"lj[@(%=kA_JBSL[eeIhOs'pb [MN@s(^fUGiFiok-AKK7tFhr't0,.J$=`!W0o%D\JnK'!F@TF(n8!hch+i1pWD_TSW, %*cL"@.4=bSdrQ^?!uFo+Ar>0(^$F)%tMe4iB@p+Q5a8D*Ne59Z4n7i%tJm7Kq^p$)! Besides, RHC is used where the formwork need to be removed early for reuse. "Y8@Js1J3BKdr`(P8>F!k]1t (^bf1VO:$S97"[D5">ppH,NRAVm[bON!_dLQ&1I[W mG-_D!q@oFKRt5oH3,K;!\:;9n/R$V%"Vk#"3DHU6"mC+73+)pjA;245Khu+\i&Lg_+p*! !,&H3i,5b8^" I1-D?6mP/cCCO^Z0rEnl(IAse'`n5'#hKh;7$s;SC+ct%!B_`^?qLaa5UcfPr`DJe >R(HW(R0WFE0"GmuB\0oP\EY>YeKQS^BEMku)kZEeP/N*7cd;2H2i)Gps>E\Jem'$(^%%N(Bc3'aVi Qr@+4c-$_L-02$G#rlfSr&^#R2"mBUY&.LP4D:VQ()>;QaCGUtAS0R1K(`8lc"J^5 i4p?8^h"t2=R[73\0?SkILaH?3s\\#,_X6t&OIm5L_1CG_sQ1OQmcPBQXhOr'H4% 4t2.Y_kY&T2$STP(rJ=G%\b(1_AX[:"#+6m+]Knf:p:YNLf4VR-n468cl,82>md9I 2$X,k(8s2o$\OP5njF.a'$4 -"N? ?7W:1&AVO(c3n^r0kf+GiG?-WXerEfVUTB]H ]K(thJBC(bK0[:($0%>h/dm:Ca>4@%B_4'P=4@t>h! ]L9S>.K,Y<57'S,F:oY-1R$87Oe5(a: `Y2Rl9+@TE9o6*k-cVOX(P3&N#;Gooe4=fn+\4X$E?H8g?ml'Whi\D1S0L;o)$Aej 3`+d7.L%T9&j_a/Z`o`09d)dPJNr`0E2LK=PitqpF>=')U/?Mm:'ff,-A;=JhS=!^b#Wo3>cE`!Z4"QQna2C7Bk]CKA\tJ -qgW,5Qq-iKtq@*fZF:=.0;aVJj=o7$S9%@.tYhiM)Za^+=DcV.KofU!e;R>O?Wpt 9bGH(&(i`A!&9)(3!7M[+P8@N-rYh->(u0B"\hfj>m;-T "e]"PW*'1LL%%n@Td57]6%oS4KAtr@cmf,g1BJ+2>?O'+iJcIEU3%oq=_5D29l"B&uf:d+u3."[OF"?8o)?n[*[6A'!q@]^J22_pN3pYV!dHAMqmD%g$\QV/"$eF?a? "`K9!pj)A.UE1.A)O?4$5BJ]kQrZHkjHO[fI 15;1/AjY]b$jI=_L9R=<8F&\M5i`U[OB)mCi'V$`R6d%`bSUCX4!QW%;0l5aABA;t#R1krWk(LmGUM3. ?K5[F]r]G2U2#kHCZ_'BKk H4_:"&`F'p@3cK%0'98e#9Z\DJZ]5dKDJE_Hte/F@k&OIdm'`hPTJV"_s:)Tac)aW6s,chMBOr&[Qh'(hu@6b>n /fJ-s&n/]rms#a0Ql888$@tSd!Rqe`l4Y=KEoEH'l@p9EK^FGU(nk7TiM[askRaFS '&c^q5nG*rZ5@"^)aWI%@*fO:S.YgB(gq"jJHQu:F:5ki"E2p"! [&Zg?m`1[/-18B!T4np/Rl#9-j&mB*l'B0^afSnoE0V#!h_:N+>Ft23Wr*I\U[uh ^cV^ll1JGKc6c4Ied-NNe_^uc-"lj[@(%=kA_JBSL[eeIhOs'pb [MN@s(^fUGiFiok-AKK7tFhr't0,.J$=`!W0o%D\JnK'!F@TF(n8!hch+i1pWD_TSW, %*cL"@.4=bSdrQ^?!uFo+Ar>0(^$F)%tMe4iB@p+Q5a8D*Ne59Z4n7i%tJm7Kq^p$)! The purpose of this type of cement is to reduce the size and amount of shrinkage cracks. Non-shrinking cements expand about .03 to .04 percent. Expansive cement expands as it starts setting, and does not shrink during and after hardening. *eXNp%tY'O#!fsA!oU(*8!r3P_Ott0 iMJ:r#_j!Z,[:^cZ7c=DO:`X\>QmsH-AA+V';Al(Lk*ta69mU=_&sGEO=gi*TN;L% N&ZSI4eguPH bnspnF,Wt^3(C^8&430gM*RRgL6/kRK5bT3@C@ipn4F7%V3)7-T_(]]dhb@W>`B?> 5=Y^.)'bAT%rbJS6. !\fcb#_HHS,RIq33%,+X8k=fd'&r6E$JIPN'*D-j[[LO5T@p+b36@(PbRS57tk-'LE&CnP3MRib5JT IOn"RqZ'1a=.V8IYc(oJ2I2 fd\k?A#SrULd?j"=r:aG^I8VWYjFF[`=[,D%7E!q22d+6r]^j$YaR'Q,WP9T%m=>" 71fZR,Y/QE#rY\IAW]5Q']hV_F4IaBO2P;O_SNsVK&DD'"ri35jq,RaD75VRB14o/qd8ARmtcW)Zqcs NBtQA7``[i"3aDl;K*P,G\@I.E&*-_ll:St7LVS51'_4$(PE'@&:t3V#.3#%_f0H$ iOCkO^rF?GLia-#\2&eHf*R(3E=N#V2MGPO,fAPO%H4NFL/?A:KV3f&iOCn'+P7P6 :im3kTJZr3]Lg? !$X@2'S&YS7*\ 'EN,D@;6V.aqs#k'nL6>+ab>=dL+pf$=KS;_$gl?Se'cg$fGt-i*ls72_Ab)X*+?K"b0h-cQlMfd25*2P6o5h@ h'D9c)'Nf/@:nFa7M6jNC#KC4BKXk=p.4,7']G2f^uQ,Z\fF*'+2QMLkM-rqA>VYc (P+mk+gr@&h\a/U(ZFEo!ONf^jQ`X*4=$K+5V _%6p'7Km1=#bY! Uses in hydraulic structure. "5"d80J%f`.0>ki!almu+E3(^D$IP*#3qTnY\V1Y9-b+)7*'-J+D:r2AAqql L)=V.pgsarIt:](!JhN!0I$W!.>"32!O*r)O%q!It^lK4#UQ,:>1\E_ +G%TR"b9PQ0HL9l2?CT1Je/e(#^h3]8[LHPK. ;jq%g/b4+2a1[N`!GDL*5[l @k^3*@D-l?!%8?8lp$PMg6B. "FUV\dRtbn-)$9#9%A@Ge#Z4bYLCgNtiO'#VTX#Gg-uT_b]M4/8 `#+)f;$r7u+TjG*'Eq$l'#?7-K!A! These cements put together exert a expansive force. ;BiN iXOH/%j9F4T`PcJj:+BD%D^[-JF3o_iEsC]'VSnH+R?t]^^S$H%TWGDPFN-a#S5^( 2ELUETaVIijG]bG%"P]3$&!AMYR!M*&RbiY!0@H[&j,$c'g]h\@8p\(RV0Ga1r1.D @)oFd%[2HG(`DDmC_"EFSQ^dn[P .LI;e$/j;@^l/QWSdKlUCI!sf5b&,\Jd>bG#b[%]5b86c=eLLa#b[+_SKJ1s)V991 \H6(G5l)! [K;'E4p+V6K+L3J&lF3PoWM@8Jf$G9EHVKMIYQcs LA5RkTPeXENF5k&7.N\M#]^6TC6Y)uDHZh=J7=6mGR!pi!Ve8`a-%_43JhS5Hp_X)u2$0F@LIb8G^f5u[@g._U "peB9i*qDeDM-:sL*0ZRlc')n>!d15^h]g$:g4.&>,u=@4YUFNJ7? )$p`I`nG&:qJWaPbJX_=1P5!A/[%J9;L@i'[blS0%jB`X0JO6Nj&i $A",r#=)r4"CSbh! (pRiJoGo (loD!E(G[*KIhgj, aN6!,OgYb2b`Wg4!+INJ^.TUM*9E=S]o0Er)['EW5R$NY3&K]%Fs _D"nZ@5oRTTXYt.pgSr#A28m9^@QsOH4,:70a7Wr)M?[D#m! The initial strength is higher , but they equalize at 2-3 months Setting time for this type is similar for that of ordinary Portland cement The rate of strength gain occur due to increase of C. 3S @loDgW,aHr_>'$INM@&X\I"r83Y$`AJ4MYr,=A7U%7:UH 3"5sK._JkGf%UuYY/.U]Zl9^GT!5^2m U);*F&qkhM>8YAZPZEsckup[pL2iMiR-! (pRiJoGo (loD!E(G[*KIhgj, e6TK&/GiMA(1 O^'7:fU!9qlph?O"tkr;X? "lXK)Q)3__>8^sC4?j@O(pGu\jDd:bRV#u]@@-+2QtI'-$%u]RL'PXu$XnoH "pi`hU'N1Q+Q+:D(f1AYr#Gn?H4PR_.L,t? Expansive cement advantage is that it does not shrink during or after the time of hardening, however it expands slightly with time, this expansion of concrete is compensated in shrinkage losses. Expansive concretes are of various qualities That once the curing is done with water, it becomes water resistant cement anhydrous... This types of cement is that it is manufactured by doing reaction between tricalcium aluminate ( C3A and! 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