Isishwankathelo:Isiphumo somxholo owahlukileyo we-hydroxypropyl methylcellulose ether kwiipropati ze-dry-mixed plastering mortar eqhelekileyo sifundwe. Iziphumo zibonise ukuba: ngokonyuka komxholo we-cellulose ether, ukuhambelana kunye noxinano kuye kwehla, kwaye ixesha lokuseta liyehla. Ulwandiso, amandla oxinzelelo lwe-7d kunye ne-28d anciphile, kodwa ukusebenza ngokubanzi kwe-dry-mixed mortar kuye kwaphuculwa.
0. Intshayelelo
Ngowama-2007, oorhulumente abathandathu kunye neekomishini zelizwe bakhuphe "Isaziso Sokuthintela Ukuxutywa Kwesitroli Kwindawo Kwezinye Izixeko Ngaphakathi Kwexesha Elimiselweyo". Okwangoku, izixeko ezili-127 kulo lonke ilizwe zenze umsebenzi "wokuthintela ukuxutywa kwesitroli esikhoyo", nto leyo eye yazisa uphuhliso olungazange lubonwe ngaphambili kuphuhliso lwesitroli esixutywe sitroli. Ngophuhliso olunamandla lwesitroli esixutywe sitroli kwiimarike zokwakha zasekhaya nezangaphandle, iintlobo ngeentlobo zesitroli esixutywe sitroli nazo zingene kweli shishini likhulayo, kodwa ezinye iinkampani zemveliso kunye neentengiso zesitroli zigqithisa ngabom ukusebenza kweemveliso zazo, zilahlekisa uphuhliso olusempilweni nolucwangcisiweyo lweshishini lesitroli esixutywe sitroli. Okwangoku, njengezitroli zekhonkrithi, izitroli ezixutywe sitroli ezixutywe sitroli zisetyenziswa kakhulu xa zidibene, kwaye zimbalwa ezisetyenziswa zodwa. Ngokukodwa, kukho iintlobo ezininzi ze-admixtures kwezinye ii-mortars ezixutywe ngokufanelekileyo nezomileyo, kodwa kwi-mortars eqhelekileyo exutywe ngokufanelekileyo nezomileyo, akukho mfuneko yokulandela inani le-admixtures, kodwa kufuneka kunikwe ingqwalasela engakumbi ekusebenzeni kwayo kunye nokusebenza kwayo, ukuze kuthintelwe ukusetyenziswa kakhulu kwe-admixtures ze-mortar, okubangela inkunkuma engeyomfuneko, kwaye kuchaphazele nomgangatho weprojekthi. Kwi-mortars eqhelekileyo exutywe ngokufanelekileyo, i-cellulose ether idlala indima yokugcina amanzi, ukuqina, kunye nokuphucula ukusebenza kolwakhiwo. Ukusebenza kakuhle kokugcinwa kwamanzi kuqinisekisa ukuba i-mortar exutywe ngokufanelekileyo ayizukubangela ukusantiwa, umgubo kunye nokunciphisa amandla ngenxa yokunqongophala kwamanzi kunye nokufuma kwesamente okungaphelelanga; isiphumo sokuqina siphucula kakhulu amandla olwakhiwo lwe-mortar emanzi. Eli phepha lenza uphando olucwangcisiweyo malunga nokusetyenziswa kwe-cellulose ether kwi-mortars eqhelekileyo exutywe ngokufanelekileyo nezomileyo, olunentsingiselo ekhokelayo yendlela yokusebenzisa i-admixtures ngokufanelekileyo kwi-mortar eqhelekileyo exutywe ngokufanelekileyo nezomileyo.
1. Izinto ezisetyenzisiweyo kunye neendlela ezisetyenzisiweyo kuvavanyo
1.1 Izinto ezisetyenziswayo zovavanyo
Isamente yayiyisamente ye-P. 042.5, uthuthu oluphuma kwimpukane luthuthu lweClass II oluvela kwisikhululo samandla eTaiyuan, i-fine aggregate yintlabathi yomlambo eyomileyo enobukhulu obuyi-5 mm nangaphezulu ehluziweyo, i-fineness modulus yi-2.6, kwaye i-cellulose ether ifumaneka kwimarike yi-hydroxypropyl methyl cellulose ether (viscosity 12000 MPa·s).
1.2 Indlela yovavanyo
Ukulungiswa kwesampulu kunye novavanyo lokusebenza kwenziwe ngokwendlela yovavanyo olusisiseko lwe-JCJ/T 70-2009 yokwakha i-mortar.
2. Isicwangciso sovavanyo
2.1 Ifomula yovavanyo
Kolu vavanyo, ubungakanani bezinto ezikrwada zetoni e-1 yodaka oluxutywe nodaka oluxutywe nodaka lusetyenziswa njengefomyula esisiseko yovavanyo, kwaye amanzi asetyenziswa ngamanzi etoni e-1 yodaka oluxutywe nodaka.
2.2 Isicwangciso esithile
Ukusebenzisa le fomula, ubungakanani be-hydroxypropyl methylcellulose ether eyongezwe kwitoni nganye ye-dry-mixed plastering mortar yi: 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 imiphumo yemithamo eyahlukeneyo ye-hydroxypropyl methylcellulose ether ekugcinweni kwamanzi, ukuhambelana, uxinano olubonakalayo, ixesha lokubeka, kunye namandla okuxinzelela kwe-dry-mixed plastering mortar eqhelekileyo, ukuze kukhokelwe i-dry-mixed plastering Ukusetyenziswa ngokuchanekileyo kwe-mortar admixtures kunokubona ngokwenene iingenelo zenkqubo elula yokuvelisa i-dry-mixed mortar, ulwakhiwo olulula, ukhuseleko lokusingqongileyo kunye nokonga amandla.
3. Iziphumo zovavanyo kunye nohlalutyo
3.1 Iziphumo zovavanyo
Imiphumo yeedosi ezahlukeneyo ze-hydroxypropyl methylcellulose ether ekugcinweni kwamanzi, ukuhambelana, uxinano olubonakalayo, ixesha lokubeka, kunye namandla okuxinzelela e-dry-mixed plastering mortar eqhelekileyo.
3.2 Uhlalutyo lweziphumo
Oku kunokubonwa kwimpembelelo yemilinganiselo eyahlukeneyo ye-hydroxypropyl methylcellulose ether ekugcinweni kwamanzi, ukuhambelana, uxinano olubonakalayo, ixesha lokubeka, kunye namandla okucinezela kwe-plastering mortar eqhelekileyo exutywe nomileyo. Ngokunyuka komxholo we-cellulose ether, izinga lokugcina amanzi kwi-wet mortar nalo liyakhula kancinci kancinci, ukusuka kwi-86.2% xa i-hydroxypropyl methyl cellulose ingaxutywanga, ukuya kwi-0.6% xa i-hydroxypropyl methyl cellulose ixutywa. Izinga lokugcina amanzi lifikelela kwi-96.3%, nto leyo ebonisa ukuba isiphumo sokugcina amanzi se-propyl methyl cellulose ether silungile kakhulu; ukuhambelana kuncipha kancinci kancinci phantsi kwesiphumo sokugcina amanzi se-propyl methyl cellulose ether (ukusetyenziswa kwamanzi ngetoni nganye ye-mortar akutshintshi ngexesha lovavanyo); Uxinano olubonakalayo lubonisa umkhwa wokuhla, obonisa ukuba isiphumo sokugcina amanzi se-propyl methyl cellulose ether sonyusa umthamo we-wet mortar kwaye sinciphise uxinano; Ixesha lokuseta liyanda kancinci kancinci ngokunyuka komxholo we-hydroxypropyl methyl cellulose ether, kunye nomxholo we Xa ifikelela kwi-0.4%, ide idlule ixabiso elichaziweyo leeyure ezi-8 ezifunekayo ngumgangatho, nto leyo ebonisa ukuba ukusetyenziswa ngokufanelekileyo kwe-hydroxypropyl methylcellulose ether kunempembelelo elungileyo yokulawula ixesha lokusebenza kwe-mortar emanzi; amandla okucinezela e-7d kunye ne-28d anciphile (Okukhona umthamo umkhulu, kokukhona ukuncipha kucaca ngakumbi). Oku kunxulumene nokwanda komthamo we-mortar kunye nokwehla koxinano olubonakalayo. Ukongezwa kwe-hydroxypropyl methyl cellulose ether kunokwenza umngxuma ovaliweyo ngaphakathi kwe-mortar eqinileyo ngexesha lokuseta kunye nokuqina kwe-mortar. Ii-Micropores ziphucula ukuqina kwe-mortar.
4. Amanyathelo okhuseleko xa kusetyenziswa i-cellulose ether kwi-mortar eqhelekileyo exutywe ne-dry
1) Ukukhethwa kweemveliso ze-cellulose ether. Ngokubanzi, okukhona i-viscosity ye-cellulose ether ikhula, kokukhona isiphumo sayo sokugcina amanzi singcono, kodwa okukhona i-viscosity iphezulu, kokukhona ukunyibilika kwayo kuncipha, nto leyo eyonakalisa amandla kunye nokusebenza kolwakhiwo lwe-mortar; ubunono be-cellulose ether buphantsi kakhulu kwi-mortar exutywe nomileyo. Kuthiwa okukhona incinci, kokukhona kulula ukuyinyibilikisa. Phantsi kwedosi efanayo, kokukhona incinci, kokukhona incinci, kokukhona isiphumo sokugcina amanzi singcono.
2) Ukukhethwa kwedosi ye-cellulose ether. Ukusuka kwiziphumo zovavanyo kunye nohlalutyo lwempembelelo yomxholo we-cellulose ether ekusebenzeni kwe-dry-mixed plastering mortar, kunokubonwa ukuba okukhona umxholo we-cellulose ether uphezulu, kokukhona kungcono, kufuneka kuqwalaselwe kwiindleko zemveliso, umgangatho wemveliso, ukusebenza kolwakhiwo kunye neenkalo ezine zemeko yokwakha ukukhetha ngokupheleleyo idosi efanelekileyo. Idosi ye-hydroxypropyl methyl cellulose ether kwi-dry-mixed mortar eqhelekileyo ingcono ibe yi-0.1 kg/t-0.3 kg/t, kwaye isiphumo sokugcina amanzi asinakuhlangabezana neemfuno ezisemgangathweni ukuba ubungakanani be-hydroxypropyl methyl cellulose ether bongezwa kancinci. Ingozi yomgangatho; idosi ye-hydroxypropyl methyl cellulose ether kwi-plastering mortar ekhethekileyo enganyangekiyo imalunga ne-3 kg/t.
3) Ukusetyenziswa kwe-cellulose ether kwi-mortar eqhelekileyo exutywe nomileyo. Kwinkqubo yokulungiselela i-mortar eqhelekileyo exutywe nomileyo, kunokongezwa isixa esifanelekileyo somxube, kungcono ukuba kubekho ukugcinwa kwamanzi kunye nesiphumo sokutyeba, ukuze yenze isiphumo se-composite superposition nge-cellulose ether, kuncitshiswe iindleko zemveliso, kwaye kongiwe izixhobo; ukuba isetyenziswa yodwa Kwi-cellulose ether, amandla okubopha awakwazi ukuhlangabezana neemfuno, kwaye isixa esifanelekileyo se-latex powder echithwayo singongezwa; ngenxa yenani eliphantsi lomxube we-mortar, impazamo yokulinganisa inkulu xa isetyenziswa yodwa. Umgangatho weemveliso ze-mortar ezixutywe nomileyo.
5. Izigqibo kunye neengcebiso
1) Kwi-dry-mixed plastering mortar eqhelekileyo, ngokonyuka komxholo we-hydroxypropyl methylcellulose ether, izinga lokugcina amanzi linokufikelela kwi-96.3%, ukuhambelana kunye noxinano kuyancitshiswa, kwaye ixesha lokuseta liyandiswa. Amandla okucinezela e-28d anciphile, kodwa ukusebenza ngokubanzi kwe-dry-mixed mortar kuphuculwe xa umxholo we-hydroxypropyl methyl cellulose ether wawuphakathi.
2) Kwinkqubo yokulungiselela udaka oluqhelekileyo oluxutywe nodaka, kufuneka kukhethwe i-cellulose ether ene-viscosity efanelekileyo kunye nobunzima, kwaye idosi yayo kufuneka imiselwe ngokungqongqo ngokusebenzisa iimvavanyo. Ngenxa yobuninzi bomxube wedaka, impazamo yokulinganisa inkulu xa isetyenziswa yodwa. Kucetyiswa ukuba uyixube nomthwali kuqala, uze wongeze ubungakanani bokongeza ukuqinisekisa umgangatho weemveliso zedaka ezixutywe nodaka.
3) Udaka oluxutywe ngodaka lushishino olusakhulayo eTshayina. Kwinkqubo yokusebenzisa umxube wedaka, akufuneki silandele ubungakanani ngokungaboniyo, kodwa sinikele ingqalelo engakumbi kumgangatho kwaye sinciphise iindleko zemveliso, sikhuthaze ukusetyenziswa kweentsalela zenkunkuma yemizi-mveliso, kwaye sifezekise ngokwenene ukonga amandla kunye nokunciphisa ukusetyenziswa.
Ixesha lokuthumela: Februwari-22-2023