Cellulose ether kumurongo wo kuringaniza

Ingaruka zahydroxypropyl methyl selulose etherku mazi, gufata amazi n'imbaraga zo guhuza minisiteri yo kwipima. Ibisubizo byerekana ko HPMC ishobora kunoza neza uburyo bwo kugumana amazi ya minisiteri yo kwipima no kugabanya ubudahangarwa bwa minisiteri. Itangizwa rya HPMC rirashobora kunoza imbaraga zo guhuza za minisiteri, ariko imbaraga zo guhonyora, imbaraga zidasanzwe hamwe nubworoherane bigabanuka. Ikizamini cyo gutandukanya SEM cyakorewe ku ngero, kandi ingaruka za HPMC ku ngaruka zo kudindiza, ingaruka zo gufata amazi n'imbaraga za minisiteri byongeye gusobanurwa uhereye ku mazi ya sima mu minsi 3 na 28.

Amagambo y'ingenzi:kwishira hejuru; Cellulose ether; Amazi meza; Kubika amazi

0. Intangiriro

Kwiyubaka-kwipimisha birashobora kwishingikiriza kuburemere bwabyo kugirango bibe umusingi uringaniye, woroshye kandi ukomeye kuri substrate, kugirango ushireho cyangwa uhuze ibindi bikoresho, kandi urashobora gukora ahantu hanini hubatswe neza, kubwibyo, umuvuduko mwinshi ni a ikintu cyingenzi cyane cyo kwishyiriraho minisiteri; Cyane cyane nkubunini bunini, imbaraga zongerewe cyangwa icyuho kiri munsi ya mm 10 gusubira inyuma cyangwa gushimangira gukoresha ibikoresho byo gutaka. Usibye gutembera neza, minisiteri yo kwisuzumisha igomba kuba ifite amazi amwe n'imbaraga, nta kintu cyo gutandukanya amaraso, kandi ikagira ibiranga izamuka rya adiabatic n'ubushyuhe buke.

Mubisanzwe, minisiteri yo kwisuzumisha isaba amazi meza, ariko amazi yukuri ya sima ya sima mubusanzwe ni cm 10 ~ 12 gusa. Kwiyubaka-minisiteri irashobora kwiyegeranya, kandi igihe cyambere cyo gushiraho ni kirekire kandi igihe cyo gushiraho ni gito. Cellulose ether nimwe mubyingenzi byingenzi byongeweho kuvangwa na minisiteri, nubwo amafaranga yiyongereye ari make cyane, ariko arashobora kuzamura cyane imikorere ya minisiteri, irashobora kunoza imikorere ya minisiteri, imikorere ikora, guhuza ibikorwa hamwe no gufata amazi, ifite uruhare runini cyane murwego rwo kwitegura-kuvanga minisiteri.

1. Ibikoresho bito nuburyo bwubushakashatsi

1.1 Ibikoresho bito

(1) Ibisanzwe P · O 42.5 sima yo mucyiciro.

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. Kugeza ubu, ether nyinshi ya selile ikoreshwa ni hydroxypropyl methyl selulose ether na hydroxyethyl methyl selulose ether.

(4) superplasticizer: polycarboxylic aside superplasticizer.

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1.2 Uburyo bwo kugerageza

Ikizamini cyakozwe hashingiwe ku nganda zisanzwe JC / T 985-2005 “Mortar-Cement-Self-leveling Mortar for Use Ground”. Igihe cyo kugena cyagenwe no kwerekeza kumurongo usanzwe no kugena igihe cya JC / T 727 sima. Kwipimisha uburinganire bwa minisiteri yo gukora, kunama no kwikuramo imbaraga zerekeza kuri GB / T 17671.Uburyo bwikizamini cyimbaraga zububiko: Ikizamini cya minisiteri 80mmx80mmx20mm cyateguwe mbere, kandi imyaka yacyo irenga 28d. Ubuso burakomeye, kandi amazi yuzuye hejuru arahanagurwa nyuma yiminota 10. Ikizamini cya minisiteri gisukwa hejuru yubuso bufite ubunini bwa 40mmx40mmx10mm. Imbaraga zinguzanyo zipimwa mugihe cyagenwe.

Gusikana microscopi ya electron (SEM) yakoreshejwe mu gusesengura morphologie y'ibikoresho bya sima mu buryo bworoshye. Mu bushakashatsi, uburyo bwo kuvanga ibikoresho byose byifu ni: ubanza, ibikoresho byifu ya buri kintu kivanze neza, hanyuma bikongerwaho mumazi yatanzwe kugirango bivangwe kimwe. Ingaruka ya selulose ether kuri minisiteri yo kwisuzumisha yasesenguwe n'imbaraga, gufata amazi, amazi no gupima microscopique ya SEM.

2. Ibisubizo nisesengura

2.1 Kugenda

Cellulose ether igira ingaruka zingenzi mukubika amazi, guhoraho no kubaka imikorere ya minisiteri yo kwipima. Cyane cyane nka minisiteri yo kwipimisha, fluidity nimwe mubipimo nyamukuru byo gusuzuma imikorere ya minisiteri yo kwipimisha. Hashingiwe ku kwemeza ibisanzwe bisanzwe bya minisiteri, amazi ya minisiteri arashobora guhinduka muguhindura ibiri muri selile.

Hamwe no kwiyongera kwa selile ether. Amazi ya minisiteri agabanuka buhoro buhoro. Iyo igipimo ari 0,06%, amazi ya minisiteri agabanuka hejuru ya 8%, kandi iyo dosiye ari 0.08%, amazi agabanuka hejuru ya 13.5%. Muri icyo gihe, hamwe no kwagura imyaka, urugero rwinshi rwerekana ko ingano ya selile ya selile igomba kugenzurwa mugihe runaka, urugero rwinshi ruzana ingaruka mbi kumazi ya minisiteri. Amazi na sima muri minisiteri bigize isuku isukuye kugirango yuzuze icyuho cyumucanga, hanyuma uzenguruke umusenyi kugirango ugire uruhare rwo gusiga amavuta, kugirango minisiteri igire amazi runaka. Hamwe no kwinjiza selile ya selile, ibirimo amazi yubusa muri sisitemu biragabanuka, kandi igipfundikizo ku rukuta rwo hanze rwumucanga kiragabanuka, bityo bigabanya umuvuduko wa minisiteri. Bitewe nibisabwa na minisiteri yipima ubwayo ifite umuvuduko mwinshi, ingano ya selile ya selile igomba kugenzurwa muburyo bukwiye.

2.2 Kubika Amazi

Kubika amazi ya minisiteri nigipimo cyingenzi cyo gupima ihame ryibigize muri sima ivanze. Ongeramo urugero rukwiye rwa selulose ether irashobora kunoza amazi ya minisiteri. Kugirango habeho reaction ya hydration yibikoresho bya sima byuzuye, urugero rwiza rwa selile ya selile irashobora kubika amazi mumabuye igihe kirekire kugirango harebwe niba hydrata yibikoresho bya sima ishobora gukorwa neza.

Ether ya selile irashobora gukoreshwa nkibikoresho bigumana amazi kuko atome ya ogisijeni kuri hydroxyl na ether ihuza na molekile zamazi kugirango zibe imigozi ya hydrogène, bigatuma amazi yubusa ahinduka amazi. Birashobora kugaragara ku isano iri hagati yibiri muri selile ya selulose nigipimo cyo gufata amazi ya minisiteri ko igipimo cyo gufata amazi ya minisiteri cyiyongera hamwe no kwiyongera kwa selile. Ingaruka zigumana amazi ya selile ether irashobora kubuza insimburangingo gufata amazi menshi kandi yihuta, kandi ikarinda guhumeka kwamazi, bityo bigatuma ibidukikije bidahungabana bitanga amazi ahagije yo kuvomera sima. Hariho kandi ubushakashatsi bwerekana ko usibye ingano ya selile ya selile, ubukonje bwayo (uburemere bwa molekile) nabwo bugira uruhare runini mu gufata amazi ya minisiteri, uko ubukonje bwinshi, niko gufata neza amazi. Cellulose ether ifite viscosity ya 400 MPa · S ikoreshwa muburyo busanzwe bwo kwipima, bishobora kunoza imikorere ya minisiteri no kunoza imikorere ya minisiteri. Iyo ubukonje burenze 40000 MPa · S, imikorere yo gufata amazi ntigikomeza kuba cyiza cyane, kandi ntigikwiye kwipimisha.

Muri ubu bushakashatsi, hafashwe icyitegererezo cya minisiteri hamwe na selile ya selile na minisiteri idafite selile. Igice cyicyitegererezo cyari imyaka 3d yicyitegererezo, naho ikindi gice cyimyaka 3d cyarakize gisanzwe kuri 28d, hanyuma hakorwa ibizamini bya hydrata ya sima mubyitegererezo byageragejwe na SEM.

Ibicuruzwa biva mumazi ya sima murugero rwubusa rwicyitegererezo cya minisiteri kumyaka 3d irenze iyo murugero hamwe na selile ya selulose, kandi kumyaka 28d, ibicuruzwa biva mumazi hamwe na selile ya selile birenze kure ibyo mubitegererezo byubusa. Kuvomera amazi hakiri kare biratinda kuko hariho firime ya firime igoye ikorwa na selile ya ether hejuru yubutaka bwa sima mugihe cyambere. Ariko, hamwe no kwagura imyaka, inzira yo kuyobora igenda gahoro. Muri iki gihe, kugumana amazi ya selulose ether kuri slurry bituma habaho amazi ahagije kugirango ashobore gukemura ikibazo cya hydration reaction, ibyo bikaba bifasha iterambere ryuzuye rya reaction. Kubwibyo, hari ibicuruzwa byinshi byamazi muri slurry murwego rwanyuma. Ugereranije, hari amazi menshi yubusa murugero rwuzuye, rushobora guhaza amazi asabwa na reaction ya sima kare. Ariko, hamwe niterambere ryibikorwa bya hydrata, igice cyamazi muricyitegererezo gikoreshwa nigikorwa cya hydrata hakiri kare, ikindi gice kikabura no guhumeka, bikavamo amazi adahagije mumashanyarazi nyuma. Kubwibyo, 3d hydrata yibicuruzwa muri sample yubusa birarenze. Ingano yibicuruzwa bitanga amazi ni bike cyane kuruta ibicuruzwa biva mu cyitegererezo birimo selile ya ether. Kubwibyo, ukurikije ibicuruzwa biva mu mazi, byongeye gusobanurwa ko kongeramo urugero rwiza rwa selile ya ether kuri minisiteri bishobora rwose gutuma amazi agumana amazi.

2.3 Gushiraho igihe

Ether ya selile ifite ingaruka zimwe zo kudindiza kuri minisiteri, hamwe no kwiyongera kwa selile. Igenamiterere ryigihe cya minisiteri noneho rirerire. Ingaruka zo kudindiza selile ya selile ifitanye isano itaziguye nimiterere yayo. Cellulose ether ifite umwuma wa glucose ya glucose, ishobora gukora isukari ya calcium ya molekuline igizwe nisukari hamwe na calcium ion mugisubizo cya hydrata ya sima, kugabanya ubukana bwa calcium ion mugihe cyo kwinjiza sima, birinda gushiraho no kugwa kwa Ca (OH) 2 n'umunyu wa calcium. kristu, kugirango bidindiza inzira ya hydrata ya sima. Ingaruka mbi ya selulose ether kuri sima ya sima ahanini biterwa nurwego rwo gusimbuza alkyl kandi ntaho ihuriye nuburemere bwa molekile. Urwego ruto rwo gusimbuza alkyl, nini muri hydroxyl, niko bigaragara ingaruka zo kudindiza. L. Semitz n'abandi. Yizeraga ko molekile ya selulose ya ether yamamajwe cyane cyane ku bicuruzwa bitanga amazi nka C - S - H na Ca (OH) 2, kandi ni gake wasangaga amabuye y'agaciro ya clinker y'umwimerere. Ufatanije nisesengura rya SEM ryibikorwa bya hydrata ya sima, usanga ether ya selile ifite ingaruka zimwe na zimwe zo kudindiza, kandi uko ibintu byinshi biri muri selile ya selile, niko bigaragara cyane ingaruka zo kudindiza ibice bya firime bigoye kumazi ya sima hakiri kare, bityo, biragaragara cyane ingaruka zo kudindiza.

2.4 Imbaraga zoroshye nimbaraga zo kwikuramo

Mubisanzwe, imbaraga nimwe mubintu byingenzi byerekana isuzuma ryibikoresho bya sima bishingiye ku sima ikiza ingaruka zivanze. Usibye imikorere yimikorere myinshi, kwipimisha-minisiteri igomba no kugira imbaraga zo kwikuramo imbaraga nimbaraga zoroshye. Muri ubu bushakashatsi, hasuzumwe imbaraga ziminsi 7 na 28 zo gukomeretsa nimbaraga zoroshye za minisiteri yubusa ivanze na selile ether.

Hamwe no kwiyongera kwa selile ether, imbaraga zo kwikuramo imbaraga nimbaraga zo kugabanuka bigabanuka muri amplitude atandukanye, ibirimo ni bito, ingaruka ku mbaraga ntabwo zigaragara, ariko hamwe nibiri hejuru ya 0.02%, kwiyongera k'umuvuduko wo gutakaza imbaraga biragaragara cyane rero, mugukoresha ether ya selile kugirango utezimbere amazi ya minisiteri, ariko kandi uzirikane no guhindura imbaraga.

Impamvu ziterwa na minisiteri yo kwikuramo imbaraga no guhinduka imbaraga. Irashobora gusesengurwa uhereye kumpande zikurikira. Mbere ya byose, imbaraga zo hambere hamwe na sima ikomera byihuse ntabwo byakoreshejwe mubushakashatsi. Iyo minisiteri yumye ivanze n’amazi, uduce tumwe na tumwe twa selulose ether reberi yamashanyarazi yabanje kwamamazwa hejuru yubutaka bwa sima kugirango ikore firime ya latex, itinda kuyobya sima kandi igabanya imbaraga za kare za matrise ya minisiteri. Icya kabiri, kugirango twigane aho dukorera hategurwa minisiteri yo kwipimisha ku rubuga, ingero zose zakozwe mu bushakashatsi ntizigeze zinyeganyega mu gihe cyo gutegura no kubumba, kandi zishingiye ku kuringaniza uburemere. Bitewe nubushobozi bukomeye bwo gufata amazi ya selulose ether muri minisiteri, umubare munini wimyenge wasigaye muri matrix nyuma yo gukomera kwa minisiteri. Ubwiyongere bwa porotike muri minisiteri nimpamvu yingenzi yo kugabanuka kwingufu zo kwikuramo no guhindagurika kwa minisiteri. Mubyongeyeho, nyuma yo kongeramo selile ya selile muri minisiteri, ibirimo polymer yoroheje mumyenge ya minisiteri iriyongera. Iyo matrix ikanda, polymer yoroheje iragoye kugira uruhare rukomeye rwo gushyigikira, ibyo nabyo bigira ingaruka kumikorere ya matrix kurwego runaka.

2.5 Imbaraga zo guhuza

Cellulose ether igira ingaruka zikomeye kumitungo ihuza minisiteri kandi ikoreshwa cyane mubushakashatsi no gutegura minisiteri yo kwipima.

Iyo ibiri muri selile ya selile iri hagati ya 0,02% na 0,10%, imbaraga zububiko bwa minisiteri biragaragara ko zateye imbere, kandi imbaraga zububiko muminsi 28 ziri hejuru cyane kurenza iyo minsi 7. Cellulose ether ikora firime ya polymer ifunze hagati ya sima ya hydrata ya sisitemu na sisitemu ya feri ya feri, iteza amazi menshi muri firime ya polymer hanze ya sima ya sima, ifasha hydrata yuzuye ya sima, kugirango izamure imbaraga zubusabane bwa paste. nyuma yo gukomera. Muri icyo gihe, ingano ikwiye ya selulose ether yongerera plastike nubworoherane bwa minisiteri, igabanya ubukana bwakarere kinzibacyuho hagati ya minisiteri na substrate, bigabanya imihangayiko yo kunyerera hagati yimbere, kandi byongera ingaruka zihuza hagati ya minisiteri na substrate muri urwego runaka. Bitewe na selile ya selile muri sima ya sima, agace kihariye kinzibacyuho ninzibacyuho hagati yimiterere ya minisiteri nibicuruzwa bitanga amazi. Uru rupapuro rwimiterere ituma zone yinzibacyuho ihinduka cyane kandi idakomeye, kuburyo minisiteri ifite imbaraga zikomeye zo guhuza.

3. Umwanzuro no kuganira

Ether ya selile irashobora kunoza uburyo bwo gufata amazi ya minisiteri yo kwipima. Hamwe n'ubwiyongere bwa selile ya selile, kubika amazi ya minisiteri bigenda byiyongera buhoro buhoro, kandi amazi ya minisiteri hamwe nigihe cyo kugabanya bigabanuka kurwego runaka. Kugumana amazi menshi cyane bizongera ubukana bwikomye, bishobora gutuma imbaraga zo guhonyora no guhinduranya imbaraga za minisiteri ikomye igihombo kigaragara. Mu bushakashatsi, imbaraga zaragabanutse cyane mugihe dosiye yari hagati ya 0,02% na 0.04%, kandi uko umubare wa selulose ether urenze, niko bigaragara ingaruka zo kudindiza. Kubwibyo, mugihe ukoresheje selulose ether, birakenewe kandi gutekereza byimazeyo imiterere yubukanishi bwa minisiteri yo kwipimisha, guhitamo neza dosiye ningaruka zo guhuza imbaraga hagati yacyo nibindi bikoresho bya shimi.

Gukoresha selulose ether irashobora kugabanya imbaraga zo gukomeretsa nimbaraga zihindagurika za sima ya sima, kandi igahindura imbaraga zihuza za minisiteri. Isesengura ryimpamvu zimpinduka zimbaraga, ahanini ziterwa nihinduka ryibicuruzwa bito n'imiterere, kuruhande rumwe, selile ya ether rubber ifu ya selile yamashanyarazi yabanje kwamamara hejuru yubutaka bwa sima, gukora firime ya latex, gutinda hydrated ya sima, izatera gutakaza imbaraga zambere zo gusebanya; Ku rundi ruhande, bitewe ningaruka za firime ningaruka zo gufata amazi, bifasha hydrated yuzuye ya sima no kuzamura imbaraga zubucuti. Umwanditsi yizera ko ubwo bwoko bubiri bwimbaraga zahindutse cyane cyane mugihe cyagenwe, kandi gutera imbere no gutinda kuribi bishobora kuba ingingo ikomeye itera ubunini bwubwoko bubiri bwimbaraga. Ubushakashatsi bwimbitse kandi butunganijwe kuri iyi ngingo ikomeye bizafasha mu kugenzura neza no gusesengura uburyo bwo kuyobya ibikoresho bya sima mu gihirahiro. Nibyiza guhindura ingano ya selulose ether nigihe cyo gukiza ukurikije icyifuzo cyimiterere ya minisiteri, kugirango tunoze imikorere ya minisiteri.