Isishwankathelo:
Ishishini lokwakha lidlala indima ebalulekileyo ekubumbeni ihlabathi lanamhlanje, apho isamente isisiseko sokwakha. Kangangeminyaka, abaphandi kunye neenjineli bebeqhubeka bekhangela iindlela zokuphucula umgangatho kunye nokusebenza kwesamente. Enye indlela ethembisayo ibandakanya ukongezwa kwezongezo, apho i-calcium formate iye yaba ngumdlali owaziwayo.
yazisa:
Isamente yinxalenye ebalulekileyo yokwakha kwaye ifuna ukuphuculwa okuqhubekayo ukuhlangabezana neemfuno ezitshintshayo zoshishino. Ukongezwa kwezongezo kuye kwabonakala ngathi yindlela esebenzayo yokuphucula iinkalo ezahlukeneyo zesamente. I-Calcium formate, i-compound eveliswa yi-reaction ye-calcium oxide kunye ne-formic acid, itsale ingqalelo yamandla ayo okuphucula iipropati zesamente. Eli nqaku lijolise ekucaciseni iindlela i-calcium formate echaphazela ngayo umgangatho kunye nokusebenza kwesamente.
Iipropati zeekhemikhali zeCalcium formate:
Ngaphambi kokuba sijonge imiphumo ye-calcium formate kwisamente, kubalulekile ukuqonda ikhemistri yesi songezo. I-calcium formate yipowder emhlophe yekristale enefomyula yekhemikhali i-Ca(HCOO)2. Inyibilika emanzini kwaye ineempawu ze-hygroscopic. Indibaniselwano eyahlukileyo ye-calcium kunye ne-formate ions inika iimpawu ezithile ze-compound, nto leyo eyenza ukuba ifaneleke kwiindlela ezahlukeneyo zokusetyenziswa, kubandakanya nokuphuculwa kwesamente.
Indlela yokusebenza:
Ukufakwa kwe-calcium formate kwimixube yesamente kwazisa iindlela ezahlukeneyo ezinegalelo ekuphuculeni ukusebenza. Enye indlela ephambili ibandakanya ukufunxwa kwesamente ngokukhawuleza. I-calcium formate isebenza njengesincedisi, ikhuthaza ukwakheka kwee-hydrate ezifana ne-calcium silicate hydrate (CSH) kunye ne-ettringite. Oku kukhawulezisa kukhokelela kwixesha lokubeka ngokukhawuleza kunye nokukhula kwamandla kwangoko.
Ngaphezu koko, i-calcium formate isebenza njengendawo yokukhupha i-hydrate, ichaphazela ulwakhiwo lwe-microstructure yesamente. Olu tshintsho lubangela ukusasazwa kwe-hydrate okuxineneyo nokufanayo, okunceda ukuphucula ukuqina nokunciphisa ukungena kwamanzi.
Ukongeza, i-calcium formate ithatha inxaxheba kwi-pozzolanic reaction, apho isabela khona ne-calcium hydroxide ukuze yenze i-CSH gel eyongezelelweyo. Le reaction ayincedi nje kuphela ekuphuhlisweni kwamandla kodwa ikwanciphisa umngcipheko wokwakheka kwe-ettringite okulibazisekileyo (DEF), into enokuphazamisa ukuqina kwesamente ixesha elide.
Ukuphuculwa komgangatho wesamente:
Uphuhliso Lwamandla Kwangoko:
Amandla e-calcium formate okukhawulezisa ukufuma kwesamente athetha ukuphucuka okukhulu ekuphuhlisweni kwamandla kwangethuba. Oku kubalulekile kwiiprojekthi zokwakha apho amandla kufuneka afumaneke ngokukhawuleza. Ixesha lokubeka elikhawulezileyo elikhuthazwa yi-calcium formate linokubangela ukususwa kwefomwork ngokukhawuleza kunye nenkqubela phambili yokwakha ngokukhawuleza.
Ukuqina okuphuculweyo:
I-calcium formate yongezwa ukutshintsha isakhiwo sesamente, nto leyo ebangela ukuba izinto zihlale ixesha elide. Ubuninzi obuphezulu kunye nokusasazwa okufanayo kwee-hydrate kunceda ekuchaseni ukuhlaselwa ngamakhemikhali, imijikelo yokuqandisa kunye nokuguguleka. Ke ngoko, ulwakhiwo lwesamente oluphathwe nge-calcium formate lubonisa ubomi obude benkonzo.
Nciphisa ukungena kwamanzi:
Enye yezinto eziphambili ezichaphazela ukuqina kwekhonkrithi kukungakwazi kwayo ukungena. I-calcium formate inciphisa ukungakwazi kwayo ukungena ngokuchaphazela ulwakhiwo lwembobo yekhonkrithi. Ukwakheka kwe-matrix exineneyo enembobo ezincinci kuthintela ukungena kwamanzi nezinto ezirhabaxa, ngaloo ndlela kwandisa ukumelana kwekhonkrithi nokuwohloka kwayo.
Ukunciphisa i-Alkali Silica Reaction (ASR):
Izifundo zifumanise ukuba i-calcium formate inokunciphisa umngcipheko wokusabela kwe-alkali-silica, inkqubo enobungozi enokubangela ukudumba kokwakheka kwejeli kunye nokuqhekeka kwikhonkrithi. Ngokuchaphazela ulwakhiwo lwemibhobho kunye nokwakheka kweekhemikhali ze-slurry yesamente, i-calcium formate inceda ukunciphisa amathuba omonakalo onxulumene ne-ASR.
Uphuculo lokusebenza:
Ukuphuculwa koomatshini:
Isiphumo se-calcium formate ekufakweni kwesamente kwi-hydration sinefuthe elihle ekusebenzeni kakuhle kwesamente entsha. Ixesha elibekiweyo elikhawulezileyo kunye ne-hydration kinetics ephuculweyo inceda ukuphucula iimpawu zokuhamba kwamanzi, iququzelele ukubekwa kunye nokuxinana kwesamente. Oku kuluncedo ngakumbi apho kulula ukuyibeka khona.
ulawulo lobushushu:
Ukusetyenziswa kwe-calcium formate kwisamente kunceda ekunciphiseni imiphumo yobushushu obugqithisileyo ngexesha lenkqubo yokucola. Ukukhawulezisa amaxesha okuseta okubangela i-calcium formate kunokukhawulezisa uphuhliso lwamandla kwaye kunciphise ubuthathaka bekhonkrithi kwiingxaki ezinxulumene nobushushu ezifana nokuqhekeka kobushushu.
Izinto ekufuneka ziqwalaselwe ukuze kubekho uzinzo:
I-calcium formate ineempawu ezihlangabezana neenjongo zokuzinza kweshishini lokwakha. Ukusebenza kwayo okunamandla kwenza kube lula ukusetyenziswa kwezinto ezilahliweyo, kwaye impembelelo yayo ekuqineni nasekusebenzeni ixesha elide inegalelo ekunciphiseni ngokubanzi iimpembelelo zokusingqongileyo ezinxulumene nokutshintsha nokulungisa izakhiwo ezidala.
Imingeni kunye nezinto ekufuneka ziqwalaselwe:
Nangona iingenelo zokufaka i-calcium formate kwisamente zicacile, imingeni enokubakho kunye nemida kufuneka iqwalaselwe. Oku kungabandakanya ukunyuka kweendleko, ukusebenzisana okunokwenzeka neminye imixube, kunye nesidingo sokulawula ngononophelo umthamo ukuze kuthintelwe iziphumo ezimbi. Ukongeza, ukusebenza kwexesha elide kunye nokuqina kwekhonkrithi ephathwe nge-calcium formate phantsi kweemeko ezithile zokusingqongileyo kufuna uphando olongezelelweyo kunye nezifundo zasentsimini.
ukuququmbela:
Ukufaka i-calcium formate kwisamente yindlela ethembisayo yokuphucula umgangatho kunye nokusebenza kwesi sixhobo sibalulekileyo sokwakha. Ngokusebenzisa indlela yaso yokusebenza eneenkalo ezininzi, i-calcium formate ikhawulezisa ukufuma kwamanzi, iphucula ulwakhiwo lwe-microstructure kwaye inegalelo kwiintlobo ngeentlobo zeempawu ezinqwenelekayo, kubandakanya uphuhliso lwamandla kwangethuba, ukuqina okuphuculweyo kunye nokuncipha kokungena kwamanzi. Njengoko ishishini lokwakha liqhubeka nokukhula, indima yezongezo ezifana ne-calcium formate ekwenzeni ngcono iipropati zesamente kusenokwenzeka ukuba iya kuba yinto ebaluleke ngakumbi. Uphando olongezelelweyo kunye nokusetyenziswa okusebenzayo ngokuqinisekileyo kuya kutyhila ngakumbi amandla apheleleyo kunye nokusetyenziswa okufanelekileyo kwe-calcium formate kwifomyula yesamente, kuvula indlela yezakhiwo ezizinzileyo nezizinzileyo.
Ixesha lokuthumela: Disemba-05-2023