I-Cellulose Ether kunye ne-Starch Ether kwiiPropati zoMdaka oMxube owomileyo

Izixa ezahlukeneyo ze-cellulose ether kunye ne-starch ether zadityaniswa zaba ngudaka oluxutywe owomileyo, kwaye ukungaguquguquki, ukuxinana okucacileyo, amandla oxinzelelo kunye namandla okubopha udaka zaphononongwa ngokuvavanywa. Iziphumo zibonisa ukuba i-cellulose ether kunye ne-starch ether inokuphucula kakhulu ukusebenza kwe-mortar, kwaye xa isetyenziswe kwidosi efanelekileyo, ukusebenza okubanzi kodaka kuya kuba ngcono.

Amagama angundoqo: i-cellulose ether; isitashi se-ether; udaka oluxutywe owomileyo

Udaka lwesintu luneziphene zokopha lula, ukuqhekeka, kunye namandla aphantsi. Akulula ukuhlangabezana neemfuno zomgangatho wezakhiwo ezikumgangatho ophezulu, kwaye kulula ukubangela ingxolo kunye nongcoliseko lokusingqongileyo ngexesha lenkqubo yokuvelisa. Ngokuphuculwa kweemfuno zabantu zokwakha umgangatho kunye nokusingqongileyo kwendalo, udaka oluxubeneyo olomileyo olusebenza ngcono olubanzi luye lwasetyenziswa ngokubanzi. Udaka oluxutyiweyo olomileyo, olukwabizwa ngokuba ludaka oluxubeneyo olomileyo, yimveliso ephantse yagqitywa edityaniswa ngokufanayo nezinto zesamente, iiaggregates ezintle, kunye nemixube kumlinganiselo othile. Ihanjiswa kwindawo yokwakha ngeengxowa okanye ngobuninzi ukuze ixutywe namanzi.

I-Cellulose ether kunye ne-starch ether zezona zixhaphakileyo zemixube yodaka lwesakhiwo. I-Cellulose ether sisiseko seyunithi yesakhiwo se-anhydroglucose efunyenwe kwiselulosi yendalo ngokusabela kwe-etherification. Yimathiriyeli yepolymer enyibilikayo emanzini kwaye ihlala isebenza njenge-lubricant kudaka. Ngaphezu koko, inokunciphisa ixabiso lokuhambelana kodaka, iphucule ukusebenza kodaka, inyuse izinga lokugcinwa kwamanzi odaka, kunye nokunciphisa amathuba okuqhekeka kodaka lodaka. I-ether yesitatshi sisitatshi endaweni ye-ether eyenziwe ngokusabela kwamaqela e-hydroxyl kwiimolekyuli zesitatshi ezinezinto ezisebenzayo. Inesakhono esihle kakhulu sokuqina ngokukhawuleza, kwaye idosi ephantsi kakhulu inokufikelela kwiziphumo ezilungileyo. Ngokuqhelekileyo ixutywe kunye neselulosi kudaka lokwakha Sebenzisa nge-ether.

1. Linge

1.1 Iimathiriyeli ekrwada

Isamente: Ishii P·I-O42.5R yesamente, ukusetyenziswa kwamanzi okusemgangathweni okusemgangathweni 26.6%.

Isanti: isanti ephakathi, imodyuli yokulunga 2.7.

I-Cellulose ether: i-hydroxypropyl methylcellulose ether (HPMC), i-viscosity 90000MPa·s (2% isisombululo samanzi, 20°C), inikwe nguShandong Yiteng New Material Co., Ltd.

Isitatshi se-ether: i-hydroxypropyl starch ether (HPS), inikwe yi-Guangzhou Moke Building Materials Technology Co., Ltd.

Amanzi: amanzi etephu.

1.2 Indlela yokuvavanya

Ngokweendlela ezichazwe "kwiMigangatho yoVavanyo lweNdlela yokuSebenza okuSisiseko yoMdaka woKwakha" JGJ/T70 kunye "neMimiselo yobuGcisa yokuPlastering Mortar" JGJ/T220, ukulungiswa kweesampulu kunye nokufunyanwa kweeparamitha zokusebenza kuyenziwa.

Kulo vavanyo, ukusetyenziswa kwamanzi kwi-benchmark mortar DP-M15 kunqunywe ngokuhambelana kwe-98mm, kwaye umlinganiselo wodaka yi-samente: isanti: amanzi = 1: 4: 0.8. Umlinganiselo we-cellulose ether kwi-mortar ngu-0-0.6%, kunye ne-dosage ye-starch ether yi-0-0.07%. Ngokutshintsha i-dosage ye-cellulose ether kunye ne-starch ether, kufunyenwe ukuba utshintsho lwe-dosage ye-admixture inefuthe kumdaka. impembelelo ekusebenzeni okunxulumeneyo. Umxholo we-cellulose ether kunye ne-starch ether ibalwa njengepesenti yobunzima besamente.

2. Iziphumo zovavanyo kunye nohlalutyo

2.1 Iziphumo zovavanyo kunye nohlalutyo lwe-single-doped admixture

Ngokomlinganiselo wesicwangciso sovavanyo esikhankanywe ngasentla, uvavanyo lwenziwa, kwaye umphumo we-admixture ye-single-mixture kwi-consistency, ubuninzi obubonakalayo, amandla oxinzelelo kunye namandla okudibanisa udaka oluxubeneyo lufunyenwe.

Ukuhlalutya iziphumo zovavanyo lwe-admixtures yokuxuba okukodwa, kunokubonwa ukuba xa isitashi se-ether sixutywa yodwa, ukuhambelana kodaka kuncipha ngokuqhubekayo xa kuthelekiswa nodaka lwebenchmark kunye nokunyuka kwesixa se-starch ether, kunye noxinaniso olubonakalayo lodaka. udaka luya kunyuka ngokunyuka kwesixa. Ukuncipha, kodwa kuhlala kukhulu kunobunzima obubonakalayo be-benchmark mortar, udaka lwe-3d kunye ne-28d amandla oxinzelelo luya kuqhubeka ukuncipha, kwaye luhlala lungaphantsi kwe-benchmark mortar compressive force, kunye nesalathiso samandla okudibanisa, kunye nokongezwa kwesitatshi ether, Amandla ebhondi aqala anyuke aze emva koko anciphe, kwaye ahlala emkhulu kunexabiso lodaka lwebenchmark. Xa i-ether ye-cellulose ixutywe kunye ne-ether cellulose yedwa, njengoko inani le-etere ye-cellulose linyuka ukusuka kwi-0 ukuya kwi-0.6%, ukuhambelana kodaka kuncipha ngokuqhubekayo xa kuthelekiswa nodaka lwereferensi, kodwa akukho ngaphantsi kwe-90mm, eqinisekisa ulwakhiwo oluhle lodaka. udaka, kunye noxinaniso olubonakalayo lunayo Ngexesha elifanayo, amandla oxinzelelo lwe-3d kunye ne-28d angaphantsi kunodaka lwereferensi, kwaye iyancipha ngokuqhubekayo ngokunyuka kwedosi, ngelixa amandla okudibanisa aphuculwe kakhulu. Xa idosi ye-cellulose ether iyi-0.4%, amandla okudibanisa udaka ngawona makhulu, phantse aphindwe kabini ukuqina kodaka lwebenchmark.

2.2 Iziphumo zovavanyo lwemixube exutyiweyo

Ngokomlinganiselo womxube wokuyila kwi-admixture ratio, isampuli yodaka oluxubeneyo oluxutyiweyo lwalungiswa kwaye lwavavanywa, kwaye iziphumo zokuhambelana kodaka, ukuxinana okubonakalayo, amandla oxinzelelo kunye namandla okudibanisa afunyenwe.

2.2.1 Impembelelo yomxube oxubeneyo ekungqinelweni kodaka

I-curve consistency ifumaneka ngokweziphumo zovavanyo lwe-compounding admixtures. Kungabonwa kule nto ukuba xa isixa se-cellulose ether yi-0.2% ukuya kwi-0.6%, kwaye isixa se-starch ether yi-0.03% ukuya kwi-0.07%, ezi zimbini zixutywe kwi-mortar Ekugqibeleni, ngelixa ligcina inani elinye. ye-admixtures, ukwandisa inani leminye i-admixture iya kukhokelela ekunciphiseni ukuhambelana kodaka. Ekubeni i-cellulose ether kunye ne-starch ether izakhiwo ziqulethe amaqela e-hydroxyl kunye neebhondi ze-ether, ii-athomu ze-hydrogen kula maqela kunye neemolekyuli zamanzi ezikhululekile kumxube zingenza iibhondi ze-hydrogen, ukuze amanzi amaninzi abophekileyo avele kumdaka kwaye anciphise ukuhamba kodaka. , ebangela ukuba ixabiso lokuhambelana kodaka liyancipha ngokuthe ngcembe.

2.2.2 Isiphumo sokudityaniswa komxube kuxinaniso olubonakalayo lodaka

Xa i-cellulose ether kunye ne-starch ether zidityaniswe kudaka kwidosi ethile, ukuxinana okubonakalayo kodaka kuya kutshintsha. Inokubonwa kwiziphumo zokuba ukudityaniswa kwe-cellulose ether kunye nestatshi ether kwidosi eyiliweyo Emva kodaka, ukuxinana okubonakalayo kodaka kuhlala malunga ne-1750kg/m.³, ngelixa ubuninzi obubonakalayo bodaka lwereferensi yi-2110kg / m³, kunye nokudityaniswa kwezi zibini kumdaka kwenza ukuba ukuxinana okubonakalayo kwehle malunga ne-17%. Kunokubonwa ukuba ukudibanisa i-cellulose ether kunye ne-starch ether kunokunciphisa ngokufanelekileyo ukuxinana okubonakalayo kodaka kwaye kwenze udaka lube khaphukhaphu. Oku kungenxa yokuba i-cellulose ether kunye ne-ether yesitatshi, njengeemveliso ze-etherification, ziyimixube enefuthe elinamandla lokungenisa umoya. Ukongeza le mixube mibini kudaka kunokunciphisa kakhulu ingxinano ebonakalayo yodaka.

2.2.3 Isiphumo somxube oxutyiweyo kumandla oxinzelelo lodaka

I-3d kunye ne-28d i-curves yamandla oxinzelelo lwe-mortar ifunyenwe kwiziphumo zovavanyo lodaka. Amandla oxinzelelo lwe-benchmark mortar 3d kunye ne-28d yi-15.4MPa kunye ne-22.0MPa, ngokulandelelana, kwaye emva kokuba i-ether cellulose kunye ne-starch ether zidityaniswe kudaka, amandla oxinzelelo lwe-mortar 3d kunye ne-28d yi-12.8MPa kunye ne-19.3MP, ngokulandelelana kwayo, bangaphantsi kunabo bangenazo zombini. I-benchmark mortar ene-admixture. Ukusuka kwimpembelelo ye-compound admixtures kumandla oxinzelelo, kunokubonwa ukuba kungakhathaliseki ukuba ixesha lokunyanga liyi-3d okanye i-28d, amandla oxinzelelo omdaka ayancipha ngokunyuka kwexabiso le-cellulose ether kunye ne-starch ether. Oku kungenxa yokuba emva kokuba i-ether cellulose kunye ne-starch ether zixutywe, amasuntswana e-latex aya kwenza umaleko obhityileyo wepolymer engenamanzi kunye nesamente, ethintela ukuhanjiswa kwesamente kunye nokunciphisa amandla oxinzelelo lodaka.

2.2.4 Impembelelo yomxube oxutyiweyo kukuqina kwebhondi yodaka

Inokubonwa kwimpembelelo ye-cellulose etha kunye ne-ether yesitatshi kumandla ancamathelayo odaka emva kokuba idosi eyiliweyo idityaniswe kwaye ixutywe kudaka. Xa idosi ye-cellulose ether yi-0.2% ~ 0.6%, idosi ye-starch ether yi-0.03% ~ 0.07% %, emva kokuba ezi zimbini zidityaniswe kwi-mortar, kunye nokwanda kwenani lezi zimbini, amandla okudibanisa i-mortar iya kunyuka ngokuthe ngcembe kuqala, kwaye emva kokufikelela kwixabiso elithile, ngokunyuka kwexabiso lokudibanisa, amandla okubambelela omdaka uya kwanda ngokuthe ngcembe. Amandla okudibanisa aya kuncipha kancinci kancinci, kodwa asemkhulu kunexabiso lebenchmark yokuqina kodaka lwebhondi. Xa udibanisa kunye ne-0.4% ye-cellulose ether kunye ne-0.05% ye-starch ether, amandla okubambisana omdaka afikelela kwinqanaba eliphezulu, elimalunga namaxesha angama-1.5 aphezulu kunomdaka we-benchmark. Nangona kunjalo, xa umlinganiselo ugqithiswa, kungekhona nje kuphela i-viscosity yodaka likhulu kakhulu, ukwakhiwa kunzima, kodwa kunye namandla okudibanisa omdaka ayancipha.

3. Isiphelo

(1) Zombini i-cellulose ether kunye ne-starch ether zinokunciphisa ngokuphawulekayo ukuhambelana kodaka, kwaye umphumo uya kuba ngcono xa ezi zimbini zisetyenziswe kunye kwisixa esithile.

⑵Ngenxa yokuba imveliso ye-etherification inomsebenzi onamandla wokungenisa umoya, emva kokufaka i-cellulose ether kunye ne-starch ether, kuya kubakho igesi eninzi ngaphakathi kodaka, ukuze emva kokongeza i-cellulose ether kunye ne-starch ether, indawo emanzi yodaka iya kuba. kuncitshiswe kakhulu, okuya kukhokelela ekunciphiseni okuhambelanayo kumandla oxinzelelo lodaka.

3 Xa udibanisa i-cellulose ether kunye ne-starch ether, kuyimfuneko ukuqinisekisa ukuba isixa sokudibanisa sifanelekile. Isixa esikhulu kakhulu asichithi nje kuphela izinto eziphathekayo, kodwa sinciphisa amandla okubopha udaka.

(4) I-Cellulose ether kunye ne-starch ether, njenge-admixtures yodaka oluqhelekileyo olusetyenziswayo, inokutshintsha ngokuphawulekayo iipropati ezifanelekileyo zodaka, ngokukodwa ekuphuculeni ukuhambelana kodaka kunye namandla okudibanisa, kunye nokubonelela ngereferensi yokulinganisa imveliso yodaka oluxutyiweyo oluxubeneyo.