Inkcazo:Impembelelo yesiqulatho esahlukileyo se-hydroxypropyl methylcellulose ether kwiipropathi zodaka oluqhelekileyo lokutyabeka oluxutyiweyo lwaphononongwa. Iziphumo zibonise ukuba: ngokunyuka komxholo we-cellulose ether, ukuhambelana kunye nokuxinana kuyancipha, kwaye ixesha lokumisela liyehla. Ukongezwa, i-7d kunye ne-28d amandla okunciphisa amandla anciphile, kodwa ukusebenza ngokubanzi kodaka oluxutyiweyo kuphuculwe.
0.Intshayelelo
Ngo-2007, amasebe amathandathu kunye neekhomishini zelizwe zakhupha “iSaziso sokuVimbela ukuxutywa kodaka kwiNdawo kwezinye iiDolophu ngaphakathi koMda weXesha”. Okwangoku, izixeko ze-127 kulo lonke ilizwe zenze umsebenzi "wokuthintela udaka olukhoyo", olwenze uphuhliso olungazange lubonwe ngaphambili ekuphuhliseni udaka oluxutyiweyo. ithuba. Ngophuhliso olomeleleyo lodaka oluxubeneyo olomileyo kwiimarike zasekhaya nezangaphandle, imixube eyomileyo exutyiweyo yodaka nayo iye yangena kweli shishini lisahlumayo, kodwa ezinye iinkampani zemveliso yodaka kunye neentengiso ziyayibaxa ngamabom ukusebenza kwemveliso yazo, zilahlekisa ukomisa- ishishini lodaka oluxutyiweyo. uphuhliso olunempilo nolucwangcisiweyo. Okwangoku, njengemixube yekhonkrithi, imixube yodaka oluxutyiweyo eyomileyo isetyenziswa ikakhulu ngokudityaniswa, kwaye imbalwa ngokwentelekiso esetyenziswa yodwa. Ngokukodwa, kukho iindidi ezininzi zemixube kwezinye iimbumba ezisebenzayo ezinomxube owomileyo, kodwa kudaka oluqhelekileyo oluxubeneyo, akukho mfuneko yokulandela inani lemixube, kodwa ingqwalasela engaphezulu kufuneka ihlawulwe ekusebenzeni kwayo kunye nokusebenza kwayo. kuthintelwe ukusetyenziswa ngokugqithisileyo kwengxubevange yodaka, kubangele inkunkuma engeyomfuneko, kwaye nokuchaphazela nomgangatho weprojekthi. Kumdaka oqhelekileyo owomileyo, i-cellulose ether idlala indima yokugcina amanzi, ukuqina, kunye nokuphuculwa komsebenzi wokwakha. Ukusebenza kakuhle kokugcinwa kwamanzi kuqinisekisa ukuba udaka oluxubeneyo olomileyo aluyi kubangela ukuthunga, umgubo kunye nokunciphisa amandla ngenxa yokunqongophala kwamanzi kunye nokungagqibekanga kwe-cement hydration; isiphumo sokuqina sinyusa kakhulu amandla okwakheka kodaka olumanzi. Eli phepha lenza uphononongo olucwangcisiweyo malunga nokufakwa kwe-etere yeselulosi kudaka oluqhelekileyo oluxubeneyo olomileyo, olunokubaluleka kwesikhokelo malunga nendlela yokusebenzisa imixube ngokufanelekileyo kudaka oluqhelekileyo oluxutyiweyo.
1. Imathiriyeli ekrwada kunye neendlela ezisetyenziswa kuvavanyo
1.1 Iimathiriyeli ekrwada zovavanyo
Isamente yayiyi-P. 042.5 yesamente, i-fly ash yi-Class II ash evela kwisikhululo samandla e-Taiyuan, i-aggregate ecocekileyo yomile isanti yomlambo enobungakanani be-5 mm okanye ngaphezulu, i-modulus ye-fineness yi-2.6, kunye ne-ether cellulose ifumaneka kurhwebo ihydroxypropyl methyl cellulose ether (viscosity 12000 MPa·s).
1.2 Indlela yokuvavanya
Ukulungiswa kwesampulu kunye novavanyo lomsebenzi lwenziwa ngokuhambelana ne-JCJ/T 70-2009 indlela yovavanyo olusisiseko lokwenziwa kodaka.
2. Isicwangciso sovavanyo
2.1 Ifomula yovavanyo
Kolu vavanyo, isixa sento nganye ekrwada ye-1 toni yodaka oluxutyiweyo oluxutyiweyo lusetyenziswa njengefomula esisiseko yovavanyo, kwaye amanzi kukusetyenziswa kwamanzi ngetoni eyi-1 yodaka oluxutyiweyo.
2.2 Isicwangciso esithile
Ukusebenzisa le fomyula, isixa se-hydroxypropyl methylcellulose ether eyongezwa kwitoni nganye yodaka oluxutyiweyo oluxutyiweyo: 0.0 kg/t, 0.1 kg/t, 0.2 kg/t, 0.3 kg/t, 0.4 kg/tt, 0.6 kg/ t, ukufunda iziphumo zeedosi ezahlukeneyo ze-hydroxypropyl methylcellulose ether kugcino lwamanzi, Ukungaguquguquki, ukuxinana okubonakalayo, ixesha lokubeka, kunye namandla acinezelayo odaka oluqhelekileyo oluxubeneyo lokutyabeka, ukuze ukhokele ukutyabeka okuxutywe okomileyo Ukusetyenziswa ngokuchanekileyo kwe-admixtures yodaka kunokuqonda ngokwenene izibonelelo zenkqubo yokuvelisa udaka oluxubeneyo olulula, ulwakhiwo olufanelekileyo, ukhuseleko lokusingqongileyo kunye nokonga amandla.
3. Iziphumo zovavanyo kunye nohlalutyo
3.1 Iziphumo zovavanyo
Iziphumo zeedosi ezahlukeneyo ze-hydroxypropyl methylcellulose ether kugcino lwamanzi, ukungaguquguquki, ukuxinana okubonakalayo, ixesha lokumisela, kunye namandla acinezelayo odaka oluqhelekileyo oluxutyiweyo lokutyabeka.
3.2 Uhlalutyo lweziphumo
Inokubonwa kwimpembelelo yeedosi ezahlukeneyo ze-hydroxypropyl methylcellulose ether kugcino lwamanzi, ukuhambelana, ukuxinana okubonakalayo, ixesha lokubeka, kunye namandla acinezelayo odaka oluqhelekileyo lokutyabeka oluxubeneyo. Ngokunyuka komxholo we-cellulose ether, izinga lokugcinwa kwamanzi lodaka olumanzi lukhula ngokuthe ngcembe, ukusuka kwi-86.2% xa i-hydroxypropyl methyl cellulose ingaxutywanga, ukuya kwi-0.6% xa i-hydroxypropyl methyl cellulose ixutywe. Izinga lokugcinwa kwamanzi lifikelela kwi-96.3%, ebonisa ukuba umphumo wokugcinwa kwamanzi wepropyl methyl cellulose ether ulungile kakhulu; ukuhambelana ngokuthe ngcembe kuncipha phantsi kwesiphumo sokugcinwa kwamanzi kwepropyl methyl cellulose ether (ukusetyenziswa kwamanzi ngetoni yodaka kuhlala kungatshintshi ngexesha lovavanyo); Ubuninzi obubonakalayo bubonisa indlela ehlayo, ebonisa ukuba ukugcinwa kwamanzi kwipropyl methyl cellulose ether kwandisa umthamo wodaka olumanzi kwaye kunciphisa ubuninzi; ixesha lokumisela ngokuthe ngcembe liyakwandisa kunye nokunyuka komxholo we-hydroxypropyl methyl cellulose ether, kunye nomxholo we-Xa ifikelela kwi-0.4%, ide idlule ixabiso elichaziweyo le-8h elifunwa ngumgangatho, ebonisa ukuba ukusetyenziswa okufanelekileyo kwe-hydroxypropyl methylcellulose ether isiphumo esihle sokulawula ngexesha lokusebenza kodaka olumanzi; amandla oxinzelelo lwe-7d kunye ne-28d anciphile (I-dosage enkulu, kucacile ngakumbi ukunciphisa). Oku kuhambelana nokunyuka komthamo womdaka kunye nokuncipha koxinzelelo olubonakalayo. Ukongezwa kwe-hydroxypropyl methyl cellulose ether kunokwenza umngxuma ovaliweyo ngaphakathi kodaka oluqinileyo ngexesha lokumisela kunye nokuqina kodaka. IiMicropores ziphucula ukuqina kodaka.
4. Izilumkiso zokusetyenziswa kwe-cellulose ether kumdaka oqhelekileyo owomileyo
1) Ukukhethwa kweemveliso ze-cellulose ether. Ngokuqhelekileyo, i-viscosity enkulu ye-ether ye-cellulose, ingcono isiphumo sayo sokugcina amanzi, kodwa iphezulu i-viscosity, iyancipha ukunyibilika kwayo, okuyonakalisa amandla kunye nokusebenza kokwakhiwa kodaka; ukucoleka kwe-cellulose ether kuncinci kudaka oluxutywe owomileyo. Kuthiwa okona kucolekileyo, kokukhona kulula ukunyibilika. Ngaphantsi kwedosi efanayo, ukucoleka kokucoleka, kokukhona umphumo wokugcinwa kwamanzi ungcono.
2) Ukukhethwa kwe-cellulose ether dosage. Ukususela kwiziphumo zovavanyo kunye nohlalutyo lwesiphumo somxholo we-cellulose ether ekusebenzeni kodaka oluxutyiweyo oluxutyiweyo, kunokubonwa ukuba umxholo ophezulu we-cellulose ether, kungcono, kufuneka kuthathelwe ingqalelo kwiindleko zokuvelisa. umgangatho wemveliso, ukusebenza kolwakhiwo kunye nemiba emine yendawo yokwakha ukuze ukhethe ngokubanzi umthamo ofanelekileyo. I-dosage ye-hydroxypropyl methyl cellulose ether kumdaka oqhelekileyo owomileyo oxutyiweyo ngokukhethekileyo i-0.1 kg / t-0.3 kg / t, kwaye umphumo wokugcinwa kwamanzi awukwazi ukuhlangabezana neemfuno eziqhelekileyo ukuba inani le-hydroxypropyl methyl cellulose ether yongezwa kwixabiso elincinci. Ingozi esemgangathweni; idosi ye-hydroxypropyl methyl cellulose ether kudaka olukhethekileyo olumelana nokutyabeka malunga ne-3 kg/t.
3) Ukusetyenziswa kwe-cellulose ether kumdaka oqhelekileyo owomileyo oxutywe nodaka. Kwinkqubo yokulungiselela udaka oluqhelekileyo oluxubeneyo, inani elifanelekileyo le-admixture linokongezwa, ngokukhethekileyo kunye nokugcinwa kwamanzi athile kunye nesiphumo sokuqina, ukwenzela ukuba ikwazi ukwenza i-composite superposition effect kunye ne-cellulose ether, ukunciphisa iindleko zemveliso, kunye nokugcina izixhobo. ; ukuba isetyenziswe yodwa Kwi-ether ye-cellulose, amandla okudibanisa akakwazi ukuhlangabezana neemfuno, kwaye inani elifanelekileyo le-latex powder elidispersible lingongezwa; ngenxa yexabiso eliphantsi le-admixture yodaka, impazamo yokulinganisa inkulu xa isetyenziswe yodwa. Umgangatho weemveliso zodaka oluxutyiweyo olomileyo.
5. Izigqibo kunye neengcebiso
I-1) Kwimibhobho ye-plastering eqhelekileyo eyomileyo, ngokunyuka komxholo we-hydroxypropyl methylcellulose ether, izinga lokugcinwa kwamanzi lingafikelela kwi-96.3%, ukuhambelana kunye nokuxinana kuyancipha, kwaye ixesha lokumisela lide. Amandla oxinzelelo lwe-28d anciphile, kodwa ukusebenza ngokubanzi kodaka oluxubileyo oluxubileyo kwaphuculwa xa umxholo we-hydroxypropyl methyl cellulose ether wawumodareyitha.
2) Kwinkqubo yokulungiselela udaka oluqhelekileyo oluxubeneyo, i-cellulose ether ene-viscosity efanelekileyo kunye ne-fineness kufuneka ikhethwe, kwaye i-dosage yayo kufuneka imiselwe ngokungqongqo ngokusebenzisa iimvavanyo. Ngenxa yexabiso eliphantsi le-admixture yodaka, impazamo yokulinganisa inkulu xa isetyenziswa yodwa. Kunconywa ukuba uxube kunye nomthwali kuqala, kwaye emva koko ukwandise inani lokongezwa ukuze uqinisekise umgangatho weemveliso zodaka ezinomileyo.
I-3) Udaka oluxutyiweyo olulomileyo lushishino olusakhulayo e-China. Kwinkqubo yokusebenzisa i-admixtures yodaka, akufuneki silandele ngobumfama ubuninzi, kodwa sihlawule ingqalelo ngakumbi kumgangatho kunye nokunciphisa iindleko zemveliso, ukukhuthaza ukusetyenziswa kweentsalela zenkunkuma yemizi-mveliso, kwaye sifezekise ngokwenene ukonga amandla kunye nokunciphisa ukusetyenziswa.
Ixesha lokuposa: Feb-22-2023