Cellulose ether kumurongo wumucanga

Gukoresha P.·II 52.5 sima yo mucyiciro nkibikoresho bya sima hamwe numucanga wicyuma nkibintu byiza, umusenyi wicyuma wumucyo ufite umuvuduko mwinshi nimbaraga nyinshi utegurwa hongewemo imiti yimiti nka kugabanya amazi, ifu ya latx na defoamer mortar idasanzwe, ningaruka zibiri zitandukanye viscosities (2000mPa·s na 6000mPa·s) ya hydroxypropyl methylcellulose ether (HPMC) ku gufata amazi, amazi n'imbaraga byakozweho ubushakashatsi. Ibisubizo byerekana ko: (1) Byombi HPMC2000 na HPMC6000 bishobora kongera cyane igipimo cyo gufata amazi ya minisiteri ivanze vuba kandi ikanoza imikorere yo gufata amazi; (2) Iyo ibiri muri selile ya selile ari bike, ingaruka kumazi ya minisiteri ntabwo igaragara. Iyo yongerewe kugera kuri 0,25% cyangwa hejuru yayo, igira ingaruka mbi mbi kumazi ya minisiteri, muribwo ingaruka mbi za HPMC6000 zigaragara cyane; . kare (iminsi 3 niminsi 7) imbaraga zo kwikuramo za minisiteri; . Muri iyi nyandiko, hafatwa ko HPMC6000 igomba gutoranywa mugihe utegura icyuma cyumucanga cyumucanga udasanzwe ufite amazi menshi, umuvuduko mwinshi wamazi nimbaraga nyinshi, kandi dosiye ntigomba kurenza 0,20%.

Amagambo y'ingenzi:umucanga w'icyuma; selile ether; ubwiza; imikorere y'akazi; imbaraga

Intangiriro

Icyuma cyicyuma nigicuruzwa cyibyuma. Hamwe niterambere ryinganda zicyuma nicyuma, gusohora buri mwaka ibyuma byicyuma byiyongereyeho toni zigera kuri miriyoni 100 mumyaka yashize, kandi ikibazo cyo guhunika kubera kunanirwa gukoresha umutungo mugihe kirakomeye cyane. Kubwibyo, gukoresha umutungo no kujugunya ibyuma hakoreshejwe uburyo bwa siyansi kandi bunoze nikibazo kidashobora kwirengagizwa. Icyuma cy'icyuma gifite ibiranga ubucucike bukabije, imiterere ikomeye n'imbaraga zo gukomeretsa cyane, kandi birashobora gukoreshwa nk'igisimbuza umucanga karemano muri sima cyangwa beto. Icyuma cyicyuma nacyo gifite reaction runaka. Icyuma cy'icyuma kiri mu ifu nziza cyane (ifu y'icyuma). Nyuma yo kuvangwa muri beto, irashobora kugira ingaruka ya pozzolanic, ifasha kongera imbaraga za slurry no kunoza intera yimbere hagati ya beto hamwe na slurry. karere, bityo byongera imbaraga za beto. Icyakora, hagomba kwitonderwa ko icyuma gisohora ibyuma nta ngamba zafashwe, okiside ya calcium yubusa imbere, oxyde ya magnesium yubusa hamwe nicyiciro cya RO bizatera umuvuduko muke wicyuma cyicyuma, ibyo bikaba ahanini bigabanya ikoreshwa ryicyuma nkicyoroshye kandi igiteranyo cyiza. Gukoresha muri sima ya sima cyangwa beto. Wang Yuji n'abandi. yavuze mu ncamake uburyo butandukanye bwo gutunganya ibyuma bisanga ibyuma byerekana ko icyuma gikoreshwa nuburyo bwo gushyushya ibintu gifite umutekano uhamye kandi gishobora gukuraho ikibazo cyacyo cyo kwaguka muri beto ya sima, kandi uburyo bwo kuvura ibintu bishyushye bwashyizwe mubikorwa muri Shanghai No 3 Uruganda rukora ibyuma nicyuma kuri bwa mbere. Usibye ikibazo cyumutekano, igiteranyo cyicyuma nacyo gifite ibiranga imyenge ikaze, impande nyinshi, hamwe n’ibicuruzwa bito bitanga amazi hejuru. Iyo ikoreshejwe nkigiteranyo cyo gutegura minisiteri na beto, imikorere yabo ikora akenshi. Kugeza ubu, hashingiwe ku kwemeza ubwinshi bw’amajwi, gukoresha icyuma nkicyuma cyiza cyo gutegura minisiteri idasanzwe nicyerekezo cyingenzi cyo gukoresha umutungo wicyuma. Ubushakashatsi bwerekanye ko kongera amazi agabanya amazi, ifu ya latex, selile ya ether, agent yinjira mu kirere hamwe na defoamer kumyuma yumucanga wumucanga bishobora kunoza imikorere yimvange no gukomera kwimikorere yumucanga wumucanga nkuko bisabwa. Umwanditsi yakoresheje ingamba zo kongeramo ifu ya latex nibindi bivanga kugirango ategure ibyuma byumucanga wumucanga mwinshi wo gusana. Mu gukora no gukoresha minisiteri, selile ether ni imiti ikunze kuvangwa. Ether ikoreshwa cyane muri selile ni hydroxypropyl methyl selulose ether (HPMC) na hydroxyethyl methyl selulose ether (HEMC). ) Tegereza. Ether ya selile irashobora kunoza imikorere yimikorere ya minisiteri ku rugero runini, nko guha minisiteri amazi meza cyane binyuze mu kubyimba, ariko kongeramo ether ya selulose nabyo bizagira ingaruka kumazi, ibirimo ikirere, kugena igihe no gukomera kwa minisiteri. Ibintu bitandukanye.

Kugirango urusheho kuyobora neza iterambere nogukoresha ibyuma byumucanga wumucanga, hashingiwe kumirimo yabanjirije ubushakashatsi bwakozwe ku cyuma cyumucanga wumucanga, iyi mpapuro ikoresha ubwoko bubiri bwimyororokere (2000mPa·s na 6000mPa·s) ya hydroxypropyl methyl selulose ether (HPMC) Kora ubushakashatsi bwubushakashatsi ku kamaro k'umusenyi w'icyuma umusenyi ufite imbaraga nyinshi ku mikorere ikora (fluidity and retrain water) and compressive and flexural strength.

1. Igice cyubushakashatsi

1.1 Ibikoresho bibisi

Isima: Onoda P.·II sima yo mu cyiciro cya 52.5.

Umusenyi wicyuma: Icyuma gihindura ibyuma byakozwe na Shanghai Baosteel gitunganywa nuburyo bushyushye, hamwe nubucucike bwa 1910kg / m³, ni iyumucanga wo hagati, hamwe na modulus nziza ya 2.3.

Kugabanya amazi: kugabanya amazi ya polycarboxylate (PC) yakozwe na Shanghai Gaotie Chemical Co., Ltd., muburyo bwifu.

Ifu ya Latex: Model 5010N yatanzwe na Wacker Chemicals (Ubushinwa) Co, Ltd.

Defoamer: Igicuruzwa P803 cyatanzwe na German Mingling Chemical Group, ifu, ubucucike 340kg / m³igipimo cy'imvi 34% (800°C), pH agaciro 7.2 (20°C DIN ISO 976, 1% MU DIST, amazi).

Ether ya selile: hydroxypropyl methylcellulose ether yatanzwe naKima Chemical Co., Ltd., imwe ifite viscosity ya 2000mPa·s yagenwe nka HPMC2000, nimwe ifite viscosity ya 6000mPa·s yagenwe nka HPMC6000.

Kuvanga amazi: amazi ya robine.

1.2 Ikigereranyo

Ikigereranyo cya sima-umucanga cyicyuma cya slag-umucanga cyateguwe mugihe cyambere cyikizamini cyari 1: 3 (igipimo rusange), igipimo cyamazi-sima cyari 0,50 (igipimo rusange), naho dosiye ya polycarboxylate superplasticizer yari 0.25% . Kubushakashatsi bugereranije, ibipimo bya selile ebyiri za selile HPMC2000 na HPMC6000 byari 0.15%, 0.20%, 0.25% na 0,30%.

1.3 Uburyo bwo kwipimisha

Uburyo bw'ikizamini cya Mortar Fluidity: tegura minisiteri ukurikije GB / T 17671-1999 "Ikizamini cya Cement Mortar Strength (ISO Method)", koresha ifu yikizamini muri GB / T2419-2005 "Uburyo bwa Cement Mortar Fluidity Test Method", hanyuma ukangure Suka minisiteri nziza. muburyo bwikizamini byihuse, uhanagura minisiteri irenze hamwe na scraper, uzamure igipimo cyikizamini uhagaritse hejuru, kandi mugihe minisiteri itagitemba, bapima diameter ntarengwa yubuso bwakwirakwijwe na minisiteri na diametre mu cyerekezo gihagaritse, kandi fata impuzandengo, ibisubizo nukuri kuri 5mm.

Ikizamini cyo gufata amazi ya minisiteri gikozwe hakurikijwe uburyo bwerekanwe muri JGJ / T 70-2009 “Uburyo bwo Kwipimisha Ibintu Byibanze Byubaka Mortar”.

Ikizamini cyimbaraga zo gukomeretsa nimbaraga za flexural ya minisiteri ikorwa hakurikijwe uburyo bwerekanwe muri GB / T 17671-1999, naho imyaka yikizamini ni iminsi 3, iminsi 7 niminsi 28.

2. Ibisubizo n'ibiganiro

2.1 Ingaruka ya selulose ether kumikorere yimikorere yicyuma cyumucanga

Uhereye ku ngaruka zinyuranye za selile ya ether kuri selile yo kugumana amazi yumucanga wumucanga wumucanga, birashobora kugaragara ko kongeramo HPMC2000 cyangwa HPMC6000 bishobora guteza imbere cyane gufata amazi ya minisiteri ivanze. Hamwe no kwiyongera kwibintu bya selile ya selile, igipimo cyo gufata amazi ya minisiteri cyiyongereye cyane hanyuma kiguma gihamye. Muri byo, iyo ibikubiye muri selile ya selile ari 0.15% gusa, igipimo cyo gufata amazi ya minisiteri cyiyongereyeho hafi 10% ugereranije nicyo kitongeyeho, kigera kuri 96%; iyo ibirimo byiyongereye kugera kuri 0,30%, igipimo cyo gufata amazi ya minisiteri kiri hejuru ya 98.5%. Birashobora kugaragara ko kongeramo ether ya selile bishobora guteza imbere cyane amazi ya minisiteri.

Uhereye ku ngaruka za dosiye zitandukanye za selulose ether kumazi yumucanga wumucanga wumucanga wumucanga, birashobora kugaragara ko mugihe dosiye ya selulose ether ari 0,15% na 0,20%, nta ngaruka zigaragara kumazi ya minisiteri; iyo dosiye yiyongereye kugera kuri 0,25% cyangwa hejuru yayo, igira ingaruka nyinshi kumazi, ariko amazi arashobora gukomeza kubikwa kuri 260mm no hejuru; iyo ether ebyiri za selile ziri mubwinshi, ugereranije na HPMC2000, ingaruka mbi za HPMC6000 kumazi ya minisiteri iragaragara.

Hydroxypropyl methyl selulose ether ni polymer itari ionic ifite amazi meza, kandi mugihe runaka, uko ubukonje bwinshi, niko gufata neza amazi hamwe ningaruka zo kubyimba. Impamvu nuko itsinda rya hydroxyl kumurongo wa molekile hamwe na atome ya ogisijeni kumurongo wa ether irashobora gukora hydrogène hamwe na molekile zamazi, bigatuma amazi yubusa mumazi aboshye. Kubwibyo, kuri dosiye imwe, HPMC6000 irashobora kongera ubwiza bwa minisiteri kurenza HPMC2000, kugabanya umuvuduko wa minisiteri, no kongera igipimo cyo gufata amazi kuburyo bugaragara. Inyandiko ya 10 isobanura ibintu byavuzwe haruguru mugukora igisubizo cya viscoelastic nyuma ya selile ya ether ya selulose imaze gushonga mumazi, kandi ikaranga ibintu bitemba muguhindura. Twakwemeza ko icyuma gipima icyuma cyateguwe muriyi mpapuro gifite amazi menshi, gishobora kugera kuri 295mm kitavanze, kandi imiterere yacyo ni nini. Iyo selulose ether yongeyeho, slurry izajya itembera neza, kandi ubushobozi bwayo bwo kugarura imiterere ni nto, bityo bigatuma kugabanuka kwimuka.

2.2 Ingaruka ya selile ya ether ku mbaraga zicyuma cyumucanga

Kwiyongera kwa selulose ether ntabwo bigira ingaruka kumikorere gusa yumucanga wumucanga wumucanga, ahubwo binagira ingaruka kumikorere.

Uhereye ku ngaruka za dosiye zitandukanye za selulose ether ku mbaraga zo kwikuramo ibyuma byumucanga wumucanga, birashobora kugaragara ko nyuma yo kongeramo HPMC2000 na HPMC6000, imbaraga zo kwikuramo za minisiteri kuri buri dosiye yiyongera uko imyaka igenda ishira. Ongeraho HPMC2000 nta ngaruka zigaragara zifite kuminsi 28 yo kwikuramo imbaraga za minisiteri, kandi ihindagurika ryimbaraga ntabwo ari nini; mugihe HPMC2000 igira ingaruka zikomeye kumbaraga za mbere (iminsi-3-niminsi 7), yerekana inzira yo kugabanuka kugaragara, nubwo dosiye yiyongera kuri 0.25% na Hejuru, imbaraga zo kwikuramo hakiri kare ziyongereyeho gato, ariko ziracyari munsi yibyo nta ongeraho. Iyo ibiri muri HPMC6000 biri munsi ya 0,20%, ingaruka zumunsi wiminsi 7 niminsi 28 zo kwikuramo ntizigaragara, kandi imbaraga zo kwikuramo iminsi 3 zigabanuka buhoro. Iyo ibiri muri HPMC6000 byiyongereye kugera kuri 0,25% no hejuru, imbaraga ziminsi 28 ziyongereye kurwego runaka, hanyuma ziragabanuka; imbaraga ziminsi 7 zaragabanutse, hanyuma ziguma zihamye; imbaraga ziminsi 3 zagabanutse muburyo butajegajega. Kubwibyo, dushobora gutekereza ko ethers ya selile ifite viscosité ebyiri za HPMC2000 na HPMC6000 nta ngaruka zigaragara zangiza ku minsi 28 yo kwikuramo imbaraga za minisiteri, ariko kongeramo HPMC2000 bigira ingaruka mbi cyane ku mbaraga za kare za minisiteri.

HPMC2000 ifite impamyabumenyi zitandukanye zo kwangirika kumbaraga zoroshye za minisiteri, ntakibazo mugihe cyambere (iminsi 3 niminsi 7) cyangwa icyiciro cyatinze (iminsi 28). Kwiyongera kwa HPMC6000 nabyo bifite urwego runaka rwingaruka mbi kumbaraga zoroshye za minisiteri, ariko urugero rwingaruka ni nto ugereranije na HPMC2000.

Usibye imikorere yo gufata amazi no kubyimba, selile ether nayo idindiza inzira ya sima. Biterwa ahanini na adsorption ya molekile ya selile ya selile ku bicuruzwa bitanga amazi ya sima, nka calcium silicate hydrate gel na Ca (OH) 2, kugirango ibe igipfundikizo; byongeye, ubwiza bwumuti wa pore bwiyongera, na selile ya etherulose ibuza kwimuka kwa Ca2 + na SO42- mubisubizo bya pore bidindiza inzira ya hydration. Kubwibyo, imbaraga zo hambere (iminsi 3 niminsi 7) ya minisiteri ivanze na HPMC yagabanutse.

Ongeramo selile ya ether kuri minisiteri bizakora umubare munini wibibyimba binini hamwe na diameter ya 0.5-3mm bitewe ningaruka zo guhumeka ikirere cya selile, kandi imiterere ya selile ether membrane yamamajwe hejuru yibi bibabi, ibyo bikaba kuri a urugero runaka rufite uruhare muguhindura ibituba. uruhare, bityo bigabanya ingaruka za defoamer muri minisiteri. Nubwo ibyuka bihumeka byameze nkibintu bifata imipira mumabuye mashya avanze, bitezimbere imikorere, iyo minisiteri imaze gukomera no gukomera, ibyinshi mubyuka bihumeka biguma mumabuye kugirango bibe imyenge yigenga, bigabanya ubucucike bugaragara bwa minisiteri. . Imbaraga zo guhonyora n'imbaraga zihinduka bigabanuka.

Birashobora kugaragara ko mugihe utegura icyuma cyumucanga wumucanga udasanzwe ufite amazi menshi, umuvuduko mwinshi wo gufata amazi nimbaraga nyinshi, birasabwa gukoresha HPMC6000, kandi dosiye ntigomba kurenza 0,20%.

mu gusoza

Ingaruka z’imitsi ibiri ya selile ya selile (HPMC200 na HPMC6000) ku gufata amazi, gutembera, gukomeretsa no guhuza imbaraga n’icyuma cy’umusenyi w’umucanga cyakozweho ubushakashatsi, kandi hasesenguwe uburyo bwo gukora ether ya selile mu cyuma cy’umucanga. Imyanzuro ikurikira:

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. Iyo ibirimo byiyongereye kugera kuri 0,25% no hejuru, HPMC2000 na HPMC6000 bigira ingaruka mbi kumazi yumucanga wumucanga wumucanga, kandi ingaruka mbi za HPMC6000 ziragaragara cyane.

. Kwiyongera kwa HPMC6000 bigira ingaruka mbi kumbaraga zingirakamaro zicyuma cyumucanga wumucanga kumyaka yose, ariko urwego rwingaruka ruri hasi cyane ugereranije na HPMC2000.