Ibyiza bya sima Paste Yahinduwe na Cellulose Ether

Mugupima imiterere yubukanishi, igipimo cyo gufata amazi, gushyiraho igihe nubushyuhe bwa hydrata ya selile ya selile hamwe na viscosité zitandukanye muri dosiye zitandukanye za paste ya sima, no gukoresha SEM mu gusesengura ibicuruzwa biva mu mazi, ingaruka za selile ya selile kumikorere ya paste ya sima yari yize. amategeko y'ingirakamaro. Ibisubizo byerekana ko kongeramo ether ya selile bishobora gutinza hydrata ya sima, gutinda gukomera kwa sima no gushiraho, kugabanya ubushyuhe bwamazi, kongera igihe cyo kugaragara kwubushyuhe bwo hejuru, kandi ingaruka zo kudindiza ziyongera hamwe no kwiyongera kwa dosiye nubukonje. Ether ya selile irashobora kongera umuvuduko wo gufata amazi ya minisiteri, kandi irashobora kunoza uburyo bwo gufata amazi ya minisiteri ifite imiterere yoroheje, ariko iyo ibirimo birenze 0,6%, kwiyongera kwingaruka zo gufata amazi ntabwo ari ngombwa; ibirimo nubukonje nibintu byerekana selile yahinduwe ya sima slurry. Mugukoresha selulose ether yahinduwe minisiteri, dosiye hamwe nubwiza bigomba gutekerezwa cyane.

Amagambo y'ingenzi:selile ether; ingano; kudindira; kubika amazi

Ubwubatsi bwa minisiteri nimwe mubikoresho byubaka bikenewe mumishinga yo kubaka. Mu myaka yashize, hamwe n’ikoreshwa ryinshi ry’ibikoresho byo gukingira urukuta no kunoza ibisabwa byo kurwanya ibicanwa no kurwanya inkombe ku nkuta zo hanze, hashyizwe ahagaragara ibisabwa kugira ngo birwanya gucika, imikorere ihuza ibikorwa ndetse n’ubwubatsi bwa minisiteri. Bitewe nubushobozi buke bwo gukama kwinshi, kudacika intege, hamwe nimbaraga nke zingirakamaro, minisiteri gakondo ntishobora kubahiriza ibyangombwa byubwubatsi, cyangwa gutera ibibazo nko kugwa mubikoresho byo gushushanya. Nka pompe ya pompe, kubera ko minisiteri itakaza amazi byihuse, gushiraho nigihe cyo gukomera biragabanuka, kandi ibibazo nko guturika no gutobora bibaho mugihe cyubwubatsi bunini, bigira ingaruka zikomeye kumiterere yumushinga. Minisiteri gakondo itakaza amazi byihuse kandi hydrata ya sima ntabwo ihagije, bigatuma habaho igihe gito cyo gufungura minima ya sima, nurufunguzo rwo kugira ingaruka kumikorere ya minisiteri.

Ether ya selile ifite ingaruka nziza yo kubyimba no gufata amazi, kandi yakoreshejwe cyane mubijyanye na minisiteri, kandi yabaye urufatiro rukomeye mugutezimbere amazi ya minisiteri no gutanga imikorere yubwubatsi, kugabanya neza kubaka no gukoresha nyuma ya minisiteri gakondo . Ikibazo cyo gutakaza amazi murwego rwo hagati. Cellulose ikoreshwa muri minisiteri ikubiyemo methyl selulose ether (MC), hydroxypropyl methyl selulose (HPMC), hydroxyethyl methyl selulose ether (HEMC), hydroxyethyl selulose ether (HEC), nibindi Muri byo, HPMC na HEMC nizo zikoreshwa cyane.

Uru rupapuro rwiga cyane cyane ku ngaruka za selile ya selile ku mikorere (igipimo cyo gufata amazi, gutakaza amazi no kugena igihe), imiterere yubukanishi (imbaraga zo gukomeretsa nimbaraga za tensile bond), amategeko agenga hydrosta na microstructure ya sima paste. Itanga inkunga kumiterere ya selulose ether yahinduwe ya sima paste kandi itanga ibisobanuro byokoresha selulose ether yahinduwe.

1. Ubushakashatsi

1.1 Ibikoresho bibisi

Isima: Isima isanzwe ya Portland (PO 42.5) sima yakozwe na Wuhan Yadong Sima Company, ifite ubuso bwihariye bwa cm 3500²/ g.

Ether ya selulose: iboneka rya hydroxypropyl methylcellulose ether (MC-5, MC-10, MC-20, viscosities ya 50.000 Pa·S, 100000 Pa·S, 200000 Pa·S, uko bikurikirana).

1.2 Uburyo

Ibikoresho bya mashini: Muburyo bwo gutegura icyitegererezo, urugero rwa selile ya selile ni 0.0% ~ 1.0% ya misa ya sima, naho igipimo cyamazi-sima ni 0.4. Mbere yo kongeramo amazi no gukurura, vanga selile ya ether na sima neza. Ikariso ya sima ifite urugero rwa 40 x 40 x 40 yakoreshejwe mugupima.

Gushiraho igihe: Uburyo bwo gupima bukorwa hakurikijwe GB / T 1346-2001 “Cement Standard Consistency Water Consumption, Gushiraho Igihe, Uburyo bwo Kwipimisha”.

Kubika Amazi: Ikizamini cyo kubika amazi ya paste ya sima bivuga bisanzwe DIN 18555 “Uburyo bwo gupima uburyo bwa sima itagira umubiri”.

Ubushyuhe bwa hydration: Ubushakashatsi bwakoresheje TAM Air microcalorimeter ya TA Instrument Company yo muri Amerika, naho igipimo cyamazi-sima ni 0.5.

Ibicuruzwa bitanga amazi: Koresha amazi na selile ya ether iringaniye, hanyuma utegure sima ya sima, utangire igihe, ufate ingero kumwanya utandukanye, uhagarike hydrated hamwe na Ethanol yuzuye yo kwipimisha, kandi igipimo cyamazi-sima ni 0.5.

2. Ibisubizo n'ibiganiro

2.1 Ibikoresho bya mashini

Uhereye ku ngaruka za selile ya ether ya selile ku mbaraga, birashobora kugaragara ko hamwe no kwiyongera kwa MC-10 ya selile ya ether, imbaraga za 3d, 7d na 28d zose zigabanuka; selulose ether igabanya imbaraga za 28d cyane. Uhereye ku ngaruka za selulose ether viscosity ku mbaraga, birashobora kugaragara ko niba ari selile ya selile ifite viscosity ya 50.000 cyangwa 100.000 cyangwa 200.000, imbaraga za 3d, 7d, na 28d zizagabanuka. Birashobora kandi kugaragara ko selile ether Viscosity nta ngaruka nini igira ku mbaraga.

2.2 Gushiraho igihe

Uhereye ku bikubiye mu 100.000 viscosity selulose ether mugihe cyagenwe, birashobora kugaragara ko hamwe no kwiyongera kwibiri muri MC-10, byombi igihe cyo gutangiza nigihe cyo gushiraho cyiyongera. Iyo ibirimo ari 1%, igihe cyo gushiraho cyambere Yageze kuri 510min, naho igihe cyanyuma cyo gushiraho kigeze 850min. Ugereranije nubusa, igihe cyambere cyo gushiraho cyongerewe na 210min, naho igihe cyanyuma cyo gushiraho cyongerewe na 470min.

Uhereye ku ngaruka za selulose ether viscosity mugihe cyagenwe, birashobora kugaragara ko yaba MC-5, MC-10 cyangwa MC-20, irashobora gutinza ishyirwaho rya sima, ariko ugereranije na ether eshatu za selile, igenamiterere rya mbere igihe nigihe cyanyuma Igihe kiramba hamwe no kwiyongera kwijimye. Ni ukubera ko ether ya selile ishobora kwamamazwa hejuru ya sima, bityo bikabuza amazi guhura nuduce twa sima, bityo bikadindiza amazi ya sima. Ninini cyane ya selulose ether, niko umubyimba wa adsorption hejuru yubutaka bwa sima, kandi ningaruka zikomeye zo kudindiza.

2.3 Igipimo cyo gufata amazi

Duhereye ku itegeko ry’ingaruka ziterwa na selile ya ether ku gipimo cyo gufata amazi, urashobora kubona ko hamwe niyongerekana ryibirimo, igipimo cyo gufata amazi ya minisiteri cyiyongera, kandi iyo selile ya selile irenze 0,6%, igipimo cyo gufata amazi ni gihamye mu karere. Ariko, ugereranije na ether eshatu za selile, hariho itandukaniro muguhindura ububobere ku gipimo cyo gufata amazi. Muri dosiye imwe, isano iri hagati yikiguzi cyo gufata amazi ni: MC-5≤MC-10≤MC-20.

2.4 Ubushuhe bwamazi

Duhereye ku ngaruka z'ubwoko bwa selile ether n'ibirimo ku bushyuhe bwa hydration, birashobora kugaragara ko hamwe no kwiyongera kwa MC-10, ubushyuhe bwa exothermic ya hydration bugabanuka buhoro buhoro, kandi igihe cy'ubushyuhe bwo hejuru cya hydrata gihinduka nyuma; Ubushyuhe bwa hydration nabwo bwagize uruhare runini. Hamwe no kwiyongera kwijimye, ubushyuhe bwa hydration bwaragabanutse cyane, kandi impinga yubushyuhe bwa hydratiya yahindutse nyuma cyane. Irerekana ko ether ya selile ishobora gutinza hydrata ya sima, kandi ingaruka zayo zo kudindiza zijyanye nibirimo hamwe nubwiza bwa selile ya ether, ibyo bikaba bihuye nibisubizo byo gusesengura igihe.

2.5 Isesengura ryibicuruzwa biva mu mazi

Duhereye ku isesengura rya SEM ryibicuruzwa bya 1d hydration, birashobora kugaragara ko mugihe 0.2% MC-10 selile ya selile yongeyeho, umubare munini wa clinker idafite amazi na ettringite hamwe na kristu nziza. %, kristu ya ettringite yagabanutse cyane, byerekana ko ether ya selile ishobora gutinza hydrata ya sima no gukora ibicuruzwa biva mugihe kimwe. Mugereranije ubwoko butatu bwa selile ya selile, urashobora gusanga MC-5 ishobora gutuma kristalisiti ya ettringite mubicuruzwa bitanga hydrata bisanzwe, kandi kristu ya ettringite nibisanzwe. bijyanye nubunini bwurwego.

3. Umwanzuro

a. Kwiyongera kwa selile ya selile bizadindiza hydrata ya sima, bidindiza gukomera no gushiraho sima, kugabanya ubushyuhe bwamazi, kandi byongere igihe cyo kugaragara kwubushyuhe bwo hejuru. Hamwe no kwiyongera kwa dosiye nubukonje, ingaruka zo kudindiza ziziyongera.

b. Ether ya selulose irashobora kongera umuvuduko wo gufata amazi ya minisiteri, kandi irashobora kunoza uburyo bwo gufata amazi ya minisiteri ifite imiterere yoroheje. Kubika amazi kwayo bifitanye isano na dosiye hamwe nubwiza. Iyo igipimo kirenze 0,6%, ingaruka zo gufata amazi ntiziyongera cyane.