Ibikoresho bya tekinike ya Cellulose Ether Yahinduwe kuri sima Mortar

Ihindurwa rya sima ryahinduwe rifite amazi-sima angana na 0.45, igipimo cya lime-umucanga cya 1: 2.5, na selile ya selile ifite viscose zitandukanye za 0%, 0.2%, 0.4%, 0,6%, 0.8%, na 1.0% .Mugupima imiterere yubukorikori bwa sima no kwitegereza microscopique morphologie, ubushakashatsi bwakozwe kuri HEMC kumbaraga zo gukomeretsa, imbaraga zidasanzwe hamwe nimbaraga zububiko bwa sima yahinduwe.Ibisubizo byubushakashatsi byerekana ko: hamwe no kwiyongera kwa HEMC, imbaraga zo kwikuramo za minisiteri yahinduwe kumyaka itandukanye igabanuka ubudahwema, kandi kugabanuka kugabanuka bikagabanuka no kwitonda;iyo hiyongereyeho ibintu bimwe bya selile ya selile, imbaraga zo kwikuramo selulose ether yahinduwe minisiteri hamwe na viscosities zitandukanye ni: HEMC20HEMC10> HEMC5.

Amagambo y'ingenzi:selile ether;isima ya sima;imbaraga zo guhonyora;imbaraga zidasanzwe;imbaraga zubumwe

1 Intangiriro

Kuri iki cyiciro, buri mwaka icyifuzo cya minisiteri ku isi kirenga toni miliyoni 200, kandi inganda ziracyiyongera.Kugeza ubu, isima gakondo ya sima ifite inenge nko kuva amaraso, gusibanganya, kugabanuka gukama kwinshi, kudacika intege nke, gukomera kwingufu nke, hamwe n’amazi atuzuye bitewe no gutakaza amazi, bigoye kubikemura, ntibitera gusa inenge zubaka, ahubwo binayobora gukomera Fenomena nko guturika kwa minisiteri, pulverisation, kumena, no gutoboka bibaho.

Nka kimwe mu bintu bikoreshwa cyane muri minisiteri yubucuruzi, selulose ether ifite imirimo yo gufata amazi, kubyimba no kudindiza, kandi irashobora gukoreshwa mugutezimbere imiterere yumubiri wa sima nko gukora, kubika amazi, guhuza ibikorwa, no kugena igihe , nko kongera cyane sima.Imbaraga zingirakamaro za minisiteri zizagabanuka, ariko imbaraga zo guhonyora, imbaraga zidasanzwe hamwe na moderi ya elastike ya sima ya minisiteri izagabanuka.Zhang Yishun n'abandi bize ingaruka za methyl selulose ether na hydroxypropyl methyl selulose ether kumiterere ya minisiteri.Ibisubizo byerekanaga ko: ether zombi za selile zishobora kunoza uburyo bwo gufata amazi ya minisiteri, nimbaraga zo guhindagurika hamwe nimbaraga zo guhonyora zigabanuka mubyiciro bitandukanye, mugihe igipimo cyo kugwiza hamwe nimbaraga zihuza za minisiteri ziyongera mubyiciro bitandukanye, kandi imikorere ya minisiteri irashobora kugabanuka kunozwa.A. .2, byerekana kwimuka kwa selile ya selile mubikoresho bishingiye kuri sima.

Muri iyi nyandiko, hifashishijwe uburyo bwo gupima minisiteri nko kurwanya compressive, kurwanya flexural resistance, guhuza, hamwe na SEM microscopique igaragara, ingaruka za selulose ether cement mortar kumiterere yubukanishi nkimbaraga zo gukandamiza, kurwanya flexural, nimbaraga zumubano mumyaka itandukanye, kandi birasobanuwe.uburyo bwibikorwa.

2. Ibikoresho bito nuburyo bwo gupima

2.1 Ibikoresho bibisi

2.1.1 Isima

Isima isanzwe ya sima yakozwe na Wuhan Huaxin Cement Co., Ltd., icyitegererezo P 042.5 (GB175-2007), ifite ubucucike bwa 3.25g / cm³ n'ubuso bwihariye bwa 4200cm²/ g.

2.1.2 Hydroxypropyl methylcellulose ether

Uwitekahydroxyethyl methyl selulose etheryakozwe na Hercules Group yo muri Amerika ifite viscosities ya 50000MPa / s, 100000MPa / s, na 200000MPa / s mubisubizo 2% kuri 25°C, n'amagambo ahinnye ni HEMC5, HEMC10, na HEMC20.

2.2 Uburyo bwo kugerageza

a.Imbaraga zo guhonyora za minisiteri yahinduwe

Imbaraga zo guhonyora umubiri wicyatsi cyageragejwe hamwe na TYE-300 imashini ikomeretsa imbaraga za Wuxi Jianyi Instrument Co., Ltd. Igipimo cyo gupakira ni 0.5 kN / s.Ikizamini cyingufu zogukora zikorwa hakurikijwe GB / T17671-1999 "Uburyo bwa Cement Mortar Strength Test Method (ISO Method)".

Mubisobanuro, formula yo kubara imbaraga zo kwikuramo umubiri wicyatsi ni:

Rc = F / S.

Aho Rc-imbaraga zo guhonyora, MPa;

F-umutwaro wo kunanirwa ukora ku cyitegererezo, kN;

S-agace k'umuvuduko, m².

Mubisobanuro, formula yo kubara imbaraga zingirakamaro zumubiri wicyatsi ni:

Rf = (3P× L) / (2b× h²) = 0.234×P

Muri formula, Rf-imbaraga zidasanzwe, MPa;

P-umutwaro wo kunanirwa ukora ku cyitegererezo, kN;

L-intera iri hagati yikigo cyo gushyigikira silinderi, ni ukuvuga 10cm;

b, h-ubugari n'uburebure bwambukiranya igice cyumubiri wikizamini, byombi ni 4cm.

b.Imbaraga zingirakamaro za sima yahinduwe

Koresha ZQS6-2000 Amatafari Yometseho Amatafari Yimbaraga kugirango apime imbaraga zifatika, kandi umuvuduko wa tensile ni 2mm / min.Ikizamini cyo guhuza imbaraga cyakozwe hakurikijwe JC / T985-2005 “Isima ishingiye kuri sima yo kwipima hasi”.

Mubisobanuro, formula yo kubara imbaraga zububiko bwumubiri wicyatsi ni:

P = F / S.

Muri formula, P.-imbaraga zingirakamaro, MPa;

F-umutwaro ntarengwa wo gutsindwa, N;

S-agace gahuza, mm².

3. Ibisubizo n'ibiganiro

3.1 Imbaraga zo guhonyora

Uhereye ku mbaraga zo kwikuramo ubwoko bubiri bwa selile ether yahinduwe na minisiteri ifite viscosité zitandukanye kumyaka itandukanye, birashobora kugaragara ko hamwe no kwiyongera kwa HEMC, imbaraga zo kwikuramo selile ya ether yahinduwe na minisiteri kumyaka itandukanye (3d, 7d na 28d) yagabanutse ku buryo bugaragara.Byaragabanutse cyane kandi buhoro buhoro: iyo ibikubiye muri HEMC bitarenze 0.4%, imbaraga zo kwikuramo zagabanutse cyane ugereranije nicyitegererezo cyambaye ubusa;mugihe ibikubiye muri HEMC byari 0.4% ~ 1.0%, inzira yo kugabanya imbaraga zo kwikuramo yagabanutse.Iyo selile ya ether iri hejuru ya 0.8%, imbaraga zo kwikuramo imyaka 7d na 28d ziri munsi yubwa sample yubusa kumyaka 3d, mugihe imbaraga zo kwikuramo za minisiteri yahinduwe 3d hafi ya zeru, kandi icyitegererezo ni gukanda byoroheje Ako kanya guhonyora, imbere ni ifu, kandi ubucucike buri hasi cyane.

Ingaruka za HEMC imwe kumbaraga zo kwikuramo za minisiteri yahinduwe kumyaka itandukanye nayo iratandukanye, byerekana ko imbaraga zo kwikuramo za 28d zigabanuka hamwe no kwiyongera kwa HEMC kurenza iya 7d na 3d.Ibi byerekana ko ingaruka zo kudindiza HEMC zabayeho kuva kera, kandi ingaruka zo kudindiza HEMC ntizigeze zigira ingaruka ku kugabanuka kwamazi muri sisitemu cyangwa gutera imbere kwa hydration, bigatuma habaho kwiyongera kwingufu zo kwikuramo ya minisiteri yahinduwe kuba ntoya kurenza iyo nta Mortar sample ivanze na HEMC.

Uhereye kumihindagurikire yumurongo wogukomeretsa imbaraga za selulose ether yahinduwe na minisiteri kumyaka itandukanye, birashobora kugaragara ko mugihe hiyongereyeho urugero rumwe rwa selile ya selile, imbaraga zo gukomeretsa za selulose ether yahinduwe na minisiteri itandukanye ni: HEMC20HEMC10> HEMC5.Ni ukubera ko HEMC ifite urwego rwo hejuru rwa polymerisation igira uruhare runini mukugabanya imbaraga zo gukomeretsa za minisiteri kurusha HEMC hamwe na polimerisiyasi nkeya, ariko imbaraga zo gukomeretsa za minisiteri zahinduwe zivanze na HEMC ziri hasi cyane ugereranije nu minisiteri yubusa idafite HEMC.

Ibintu bitatu bikurikira bikurikira biganisha ku kugabanuka kwingufu zo kwikuramo za minisiteri yahinduwe: kuruhande rumwe, kubera ko imiyoboro y'amazi ya HEMC ya elegitoronike ya HEMC itwikiriye ibice bya sima, CSH gel, calcium oxyde, calcium aluminate hydrate nibindi bice kandi bidafite amazi. ibice Ku buso, cyane cyane mugihe cyambere cya hydrata ya sima, adsorption hagati ya calcium aluminate hydrate na HEMC idindiza reaction ya hydratiya ya calcium aluminate, bigatuma kugabanuka gukomeye kwingufu.Ingaruka zo kudindiza za minisiteri ihoraho iragaragara, yerekana ko iyo ibiri muri HEMC20 bigeze kuri 0.8% ~ 1%, imbaraga za 3d za sample ya moderi yahinduwe ni zeru;kurundi ruhande, igisubizo cya HEMC hydrated gifite ubwiza bwinshi, kandi mugihe Mugihe cyo kuvanga minisiteri, irashobora kuvangwa numwuka kugirango habeho umwuka mwinshi mwinshi, bikavamo umubare munini wubusa mumabuye akomeye. , n'imbaraga zo kwikuramo icyitegererezo zigabanuka ubudahwema hamwe no kwiyongera kwa HEMC no kwiyongera kurwego rwa polymerisation;Sisitemu ya minisiteri yongerera gusa imiterere ya minisiteri kandi ntishobora gukina uruhare rwinkunga ikomeye, bityo imbaraga zo kwikuramo ziragabanuka.

3.2 Imbaraga zoroshye

Uhereye ku mbaraga zihindagurika za selile ebyiri zitandukanye za viscosity selulose ether zahinduwe na minisiteri kumyaka itandukanye, birashobora kugaragara ko nkimpinduka zimbaraga zo gukomeretsa za minisiteri yahinduwe, imbaraga za flexural ya selulose ether yahinduwe minisiteri igenda igabanuka buhoro buhoro hamwe no kwiyongera kwa HEMC.

Uhereye kumurongo wo guhindura imbaraga za flexural imbaraga za selulose ether yahinduwe na minisiteri kumyaka itandukanye, birashobora kugaragara ko mugihe ibikubiye muri selulose ether ari bimwe, imbaraga za flexural ya HEMC20 yahinduwe ya minisiteri iri munsi gato ugereranije niy'icyitegererezo cya minisiteri ya HEMC10, mugihe Iyo ibikubiye muri HEMC ari 0.4% ~ 0.8%, 28d flexural imbaraga zihindura imirongo ya byombi hafi ya byose.

Uhereye ku mpinduka zifatika zingufu zingirakamaro za selulose ether yahinduwe minisiteri kumyaka itandukanye, birashobora kandi kugaragara ko impinduka zimbaraga zimiterere ya minisiteri yahinduwe ari: HEMC5

3.3 Imbaraga

Birashobora kugaragara uhereye kumurongo uhindagurika kumbaraga zingirakamaro za selile eshatu za selile ya ether yahinduwe mumyaka itandukanye ko imbaraga zububiko bwa minisiteri yahinduwe yiyongera hamwe no kwiyongera kwa HEMC kandi buhoro buhoro bigenda bihinduka.Hamwe no kwagura imyaka, imbaraga zububiko bwa minisiteri yahinduwe nayo yerekanye inzira igenda yiyongera.

Birashobora kugaragara uhereye kuminsi 28 yububasha bwimbaraga zahinduye imirongo itatu ya selile ya ether yahinduwe ko imbaraga zububiko bwa minisiteri yahinduwe ziyongera hamwe no kwiyongera kwa HEMC, kandi buhoro buhoro bigenda bihinduka.Muri icyo gihe, hamwe no kwiyongera kurwego rwa polymerisation ya selulose ether, ihinduka ryimbaraga zububiko bwa minisiteri yahinduwe ni: HEMC20> HEMC10> HEMC5.

Ibi biterwa no kwinjiza umubare munini wa pore muri minisiteri yahinduwe irimo ibintu byinshi bya HEMC, bigatuma habaho kwiyongera kwimitsi yumubiri ukomantaye, kugabanuka kwubucucike bwimiterere, no gukura gahoro kwingufu zububiko ;mu kizamini cya tensile, kuvunika kwabaye muri minisiteri yahinduwe Imbere, ntavunika hejuru yubusabane hagati ya minisiteri yahinduwe na substrate, ibyo bikaba byerekana ko imbaraga zubusabane hagati ya minisiteri yahinduwe na substrate iruta iyikomeye. yahinduwe.Ariko, mugihe ingano ya HEMC ari mike (0% ~ 0.4%), molekile ya HEMC ikabura amazi irashobora gupfuka no kuzinga kuri sima ya hydrata ya hydrata, hanyuma igakora firime ya polymer hagati ya sima, ibyo bikaba byongera guhinduka no guhinduka kwa yahinduwe.Plastike, kandi kubera amazi meza ya HEMC, minisiteri yahinduwe ifite amazi ahagije yo gufata amazi, bigatuma iterambere ryimbaraga za sima, kandi imbaraga zububiko bwa sima yahinduwe yiyongera kumurongo.

3.4 SEM

Uhereye kuri SEM igereranya amashusho mbere na nyuma ya selulose ether yahinduwe na minisiteri, birashobora kugaragara ko itandukaniro riri hagati yintete za kirisiti muri minisiteri idahinduwe ni nini cyane, kandi hakozwe kristu nkeya.Muri minisiteri yahinduwe, kristu ikura neza, kwinjiza ether ya selile yatezimbere imikorere yo gufata amazi ya minisiteri, sima iba yuzuye neza, nibicuruzwa biva mumazi biragaragara.

Ni ukubera ko selile ya selile yavuwe hakoreshejwe uburyo bwihariye bwa etherification, ifite gutatanya neza no kubika amazi.Amazi arekurwa buhoro buhoro mugihe kirekire, gusa amazi make arahunga ava mumyobo ya capillary kubera gukama no guhumeka, kandi igice kinini cyamazi kiyobora hamwe na sima kugirango imbaraga za minisiteri yahinduwe.

4 Umwanzuro

a.Mugihe ibikubiye muri HEMC byiyongera, imbaraga zo kwikuramo za minisiteri yahinduwe kumyaka itandukanye igabanuka ubudahwema, kandi intera yo kugabanuka iragabanuka kandi ikunda kuba iringaniye;iyo ibikubiye muri selile ya selile irenze 0.8%, 7d na 28d Imbaraga zo gukomeretsa zimyaka 3d yubusa ntangarugero iri munsi yicyitegererezo cyambaye ubusa, mugihe imbaraga za 3d zifite imbaraga zo kwikuramo za minisiteri yahinduwe ni hafi zeru.Icyitegererezo kimeneka iyo kanda byoroheje, kandi imbere ni ifu nubucucike buke.

b.Iyo hiyongereyeho selile ingana na selile, imbaraga zo kwikuramo selulose ether yahinduwe na minisiteri hamwe nubwiza butandukanye burahinduka kuburyo bukurikira: HEMC20HEMC10> HEMC5.

c.Imbaraga zihindagurika za selileose ether yahinduwe minisiteri igabanuka buhoro buhoro hamwe no kwiyongera kwa HEMC.Guhindura imbaraga zingirakamaro za minisiteri yahinduwe ni: HEMC5

d.Imbaraga zo guhuza za minisiteri zahinduwe ziyongera hamwe no kwiyongera kwa HEMC, kandi buhoro buhoro bigenda bihinduka.Muri icyo gihe, hamwe no kwiyongera kurwego rwa polymerisation ya selulose ether, ihinduka ryimbaraga zububiko bwa minisiteri yahinduwe ni: HEMC20> HEMC10> HEMC5.

e.Ether ya selulose imaze kuvangwa muri sima ya sima, kristu ikura neza, imyenge iri hagati yintete za kirisiti iragabanuka, kandi sima iba yuzuye neza, itanga imbaraga zo guhonyora, guhuza no guhuza imbaraga za sima.