Mfundo yogwira ntchito ya hydroxypropyll methylcellulose mu matope

Hydroxypropyl methylcellulose (hpmc)Ndi malo osungunuka a polymer omwe amagwiritsidwa ntchito kwambiri m'makampani omanga, makamaka mu matope a simenti, matope a gypsum ndi tile. Monga chowonjezera cha matope, hpmc chimatha kusintha magwiridwe antchito, kusintha zinthu, kutsatira, kusungidwa kwamadzi komanso kupindika kukana kwa matope onse.

1. Zoyambira za HPMC

HPMC imapezeka kwambiri ndikusintha kusintha kwa cellulose, ndipo ili ndi madzi abwino kuthira, kukulira, mawonekedwe a filimu, ndi kukhazikika. Mphamvu zake zofunika kuphatikizira:

Kusungunuka kwamadzi: Iyo imatha kusungunuka m'madzi ozizira kapena otentha kuti apange njira yowonekera kapena yosinthira ma viscous.
Kukula Kwakukulu: kumatha kuwonjezera mawidwe a yankho ndikuwonetsa kukula kwamphamvu m'malo otsika kwambiri.
Kusungidwa kwamadzi: HPMC imatha kutchera madzi ndi kutupa, ndipo imatenga gawo m'matayala kuti aletse madzi kuti asatayike mwachangu kwambiri.
Mphamvu: ili ndi thixotropy, zomwe zimathandizira kukonza mapangidwe ake.

2. Udindo waukulu wa HPMC ku matope

Udindo wa HPMC mu matope umawonekera makamaka muzinthu zotsatirazi:

2.1 Kukonzanso madzi osungira matope

Panthawi yomanga matope a simenti, ngati madziwo atuluka mwachangu kwambiri kapena amatanganidwa kwambiri ndi maziko, zimatsogolera kusakwanira kwa ma simenti okwanira a sime ndikukhudza chitukuko. HPMC imapanga ma yunifolomu yofanana ndi matope mu hydrophilicity yake ndi manyowa amadzi ndi luso lokulitsa, limachepetsa kuchepa kwa madzi, potero ndikukweza nthawi yomanga.

2.2 Kukula, kukonza kugwirira ntchito matope

HPMC ili ndi mphamvu yabwino, yomwe imatha kuwonjezera matope a matope, kupanga matope kukhala ndi pulasitiki, ndikuletsa matope kuchokera ku stratization. Nthawi yomweyo, kukula koyenera kumatha kusintha matope, kumapangitsa kuti zikhale zosavuta kugwiritsa ntchito ndi kuchuluka pantchito yomanga, ndikuwongolera mphamvu yomanga.

2.3 Kupititsa patsogolo kulumikizana ndi kukonza zomata za matope

Mu ntchito monga matabwa a tile zomata, matope ndi matope a matope, gulu la matope ndi lofunikira. HPMC imatanthawuza filimu ya polymer pakati pa maziko ndikuti akukangana kudzera pa filimu, zomwe zimapangitsa kulimba kwa matope a matope a matope a matope a matope a matope ndikugwa.

2.4 Sinthani zomangamanga ndikuchepetsa sag

Zomangamanga zowongoka (monga khoma lolumikizira khoma kapena tile zomangamanga), matope amayamba kusanja kapena kuwuluka chifukwa cha kulemera kwake. HPMC imawonjezera kutsindika kwa zokolola ndi matontho a matope, kotero kuti matope atha kukhala pafupi kutsatira zomangamanga, potero ndikuwongolera kukhazikika kwa ntchito yomanga.

2.5 owonjezera kukana ndikusintha

Matope amayamba kukhala ming'alu chifukwa cha sridage nthawi yolimbana, ndikukhudza ntchitoyi. HPMC imatha kusintha nkhawa zamkati ndikuchepetsa mtengo wa shring. Nthawi yomweyo, posintha kusintha kwa matope, kumakhala kovuta kwambiri kutentha kapena kupsinjika kwakunja, potengera kuwongolera kulimba.

2.6 Kukhumudwitsa nthawi ya matope

HPMC imakhudza nthawi yokhazikitsa matope posintha liwiro la simenti hydrate. Kuchuluka kwa hpmc yoyenera kumatha kukulitsa nthawi yomangayi ndikuwonetsetsa kuti njira yomanga ikhale yomanga, koma kugwiritsa ntchito mwapadera kungakupangitseni nthawi ndikukhumudwitsani polojekitiyi, motero mlingo uyenera kulamulidwa.

3. Mphamvu ya hpmc mlingo pa matope

Mlingo wa hpmc mu matope nthawi zambiri amakhala wotsika, nthawi zambiri pakati pa 0,1% ndi 0,5%. Mlingo wotsimikizira umatengera mtundu wa matope ndi zofuna zomanga:

Mlingo wotsika (≤0.1%): Imatha kusintha kusungidwa kwamadzi ndikuwonjezera pang'ono kugwirira ntchito matope, koma mphamvu yakumwambayo ndi yofooka.

Mlingo wamkati (0.1% ~ 0.3%): Imathandiza kwambiri kusungidwa kwamadzi, kutsatira matope ndi oletsa matope.

Mlingo wapamwamba (≥0.3%): Kukulitsa kwambiri nthawi, onjezani nthawi, ndipo musakhale osavomerezeka pomanga.

Monga chowonjezera cha matope,HpmcImagwira ntchito yofunika kwambiri pokonza madzi, kusintha magwiridwe antchito, onjezerani zotsatsa komanso kukana kukana. Zowonjezera zoyenera za HPMC zitha kusintha momwe matope onse amagwirira ntchito matope ndikuwongolera ntchitoyi. Nthawi yomweyo, mlingo umafunikira kulamulidwa kuti apewe zovuta panthawi ndi madzi omanga. M'tsogolomu, poyambitsa makampani omanga, chiyembekezo cha ntchito za HPMC mu zida zatsopano zobiriwira zidzakhala zowonjezera.