Cellulose ether ndi chowonjezera chofala mu zipangizo zomangira, chomwe chimagwiritsidwa ntchito kupititsa patsogolo ntchito yomanga ndi mphamvu za makina a matope. Kusalala ndi chimodzi mwa zinthu zofunika kwambiri za cellulose ether, zomwe zikutanthauza kufalikira kwa tinthu tating'onoting'ono take.
Makhalidwe ndi ntchito za ether ya cellulose
Cellulose ether makamaka imaphatikizapo hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC), ndi zina zotero. Ntchito zawo zazikulu pomanga matope ndi izi:
Kusunga madzi: mwa kuchepetsa kuuma kwa madzi, kutalikitsa nthawi ya madzi a simenti, komanso kulimbitsa mphamvu ya matope.
Kukhuthala: Kuonjezera kukhuthala kwa matope ndikuwongolera magwiridwe antchito omanga.
Kuwongolera kukana ming'alu: Kapangidwe ka cellulose ether kosunga madzi kumathandiza kuwongolera kuchepa kwa simenti, motero kuchepetsa ming'alu mu matope.
Kusalala kwa ether ya cellulose kumakhudza kufalikira kwake, kusungunuka kwake, komanso kugwira ntchito bwino kwake mu matope, motero kumakhudza magwiridwe antchito onse a matope.
Zotsatira za kupyapyala kwa etha ya cellulose pa mphamvu ya matope zitha kufufuzidwa kuchokera mbali zotsatirazi:
1. Kuchuluka kwa kusungunuka ndi kufalikira
Kuchuluka kwa kusungunuka kwa ether ya cellulose m'madzi kumagwirizana kwambiri ndi kusalala kwake. Tinthu ta ether ya cellulose tomwe tili ndi kusalala kwambiri timasungunuka mosavuta m'madzi, motero timapanga kufalikira kofanana mwachangu. Kufalikira kofanana kumeneku kungatsimikizire kuti madzi amasungidwa bwino komanso akukhuthala mu dongosolo lonse la matope, kulimbikitsa kupita patsogolo kofanana kwa madzi a simenti, ndikuwonjezera mphamvu yoyambirira ya matope.
2. Kusunga madzi
Kusalala kwa cellulose ether kumakhudza momwe imasungira madzi. Tinthu ta cellulose ether tomwe tili ndi kusalala kwambiri timapereka malo akuluakulu pamwamba pake, motero timapanga mapangidwe ambiri a microporous osunga madzi mu matope. Micropores izi zimatha kusunga madzi bwino, kutalikitsa nthawi yochitira hydration ya simenti, kulimbikitsa kupangika kwa zinthu zosungunulira madzi, motero zimawonjezera mphamvu ya matope.
3. Kulumikizana kwa mawonekedwe
Chifukwa cha kufalikira kwawo bwino, tinthu ta cellulose ether tomwe tili ndi ulusi wopyapyala kwambiri titha kupanga mgwirizano wofanana pakati pa matope ndi aggregate, ndikuwonjezera mgwirizano wa matope. Izi zimathandiza matope kukhalabe ndi pulasitiki wabwino pachiyambi, kuchepetsa ming'alu ya shrinkage, motero kukulitsa mphamvu yonse.
4. Kulimbikitsa madzi a simenti
Pa nthawi yothira simenti, kupanga zinthu zothira madzi kumafuna madzi enaake. Cellulose ether yokhala ndi ulusi wopyapyala kwambiri imatha kupanga madzi ofanana mu matope, kupewa vuto la chinyezi chosakwanira kapena chochulukirapo, kuonetsetsa kuti madzi akuyenda bwino, motero kulimbitsa mphamvu ya matope.
Kufufuza koyesera ndi kusanthula zotsatira
Pofuna kutsimikizira momwe kusalala kwa etha ya cellulose kumakhudzira mphamvu ya matope, maphunziro ena oyesera adasintha kusalala kwa etha ya cellulose ndikuyesa mphamvu zake zamakaniko a matope mosiyanasiyana.
Kapangidwe koyesera
Kuyesera nthawi zambiri kumagwiritsa ntchito zitsanzo za cellulose ether za fineness zosiyanasiyana ndikuziwonjezera ku simenti motsatana. Mwa kuwongolera zinthu zina (monga chiŵerengero cha madzi ndi simenti, chiŵerengero cha aggregate, nthawi yosakaniza, ndi zina zotero), fineness ya cellulose ether yokha ndi yomwe imasinthidwa. Mayeso angapo a mphamvu, kuphatikizapo mphamvu yokakamiza ndi mphamvu yosinthasintha, amachitidwa.
Zotsatira zoyesera nthawi zambiri zimasonyeza:
Zitsanzo za ether ya cellulose zokhala ndi kupyapyala kwambiri zimatha kusintha kwambiri mphamvu yokakamiza komanso mphamvu yopindika ya matope pachiyambi (monga masiku atatu ndi masiku 7).
Ndi nthawi yowonjezereka yophikira (monga masiku 28), cellulose ether yokhala ndi kupyapyala kwakukulu imatha kupitiliza kupereka madzi abwino komanso mgwirizano wabwino, kusonyeza kukula kwamphamvu kokhazikika.
Mwachitsanzo, mu kafukufuku wina, mphamvu yokakamiza ya ma ether a cellulose okhala ndi ulusi wa 80 mesh, 100 mesh, ndi 120 mesh m'masiku 28 inali 25 MPa, 28 MPa, ndi 30 MPa motsatana. Izi zikusonyeza kuti ulusi wa cellulose ether ukakhala wokwera, mphamvu yokakamiza ya matope imakhala yokulirapo.
Kugwiritsa ntchito bwino kwa ether fineness ya cellulose
1. Sinthani malinga ndi malo omangira
Pomanga pamalo ouma kapena pansi pa kutentha kwambiri, efa ya cellulose yokhala ndi fineness yapamwamba imatha kusankhidwa kuti iwonjezere kusunga madzi a matope ndikuchepetsa kutayika kwa mphamvu komwe kumachitika chifukwa cha kuuma kwa madzi.
2. Gwiritsani ntchito limodzi ndi zowonjezera zina
Cellulose ether yokhala ndi kupyapyala kwambiri ingagwiritsidwe ntchito limodzi ndi zowonjezera zina (monga zochepetsera madzi ndi zolowetsa mpweya) kuti ziwonjezere magwiridwe antchito a matope. Mwachitsanzo, kugwiritsa ntchito zochepetsera madzi kumatha kuchepetsa chiŵerengero cha madzi ndi simenti ndikuwonjezera kuchuluka kwa matope, pomwe cellulose ether imapereka mphamvu zosungira madzi ndi kulimbitsa. Kuphatikiza kwa ziwirizi kungathandize kwambiri kulimbitsa matope.
3. Kukonza bwino njira yomanga
Pa nthawi yomanga, ndikofunikira kuonetsetsa kuti etha ya cellulose yasungunuka bwino ndikufalikira. Izi zitha kuchitika powonjezera nthawi yosakaniza kapena kugwiritsa ntchito zida zoyenera zosakaniza kuti zitsimikizire kuti ubwino wa etha ya cellulose wagwiritsidwa ntchito mokwanira.
Kusalala kwa etha ya cellulose kumakhudza kwambiri mphamvu ya matope. Etha ya cellulose yokhala ndi kusalala kwakukulu imatha kugwira ntchito bwino pakusunga madzi, kukhuthala ndikuwongolera kulumikizana kwa mawonekedwe, ndikuwonjezera mphamvu yoyambirira komanso mphamvu yayitali yamakina a matope. Mu ntchito zenizeni, kusalala kwa etha ya cellulose kuyenera kusankhidwa moyenera ndikugwiritsidwa ntchito malinga ndi momwe zimakhalira ndi zofunikira pakumanga kuti ntchito ya matope iyende bwino komanso kukonza bwino ntchito ya pulojekitiyi.
Nthawi yotumizira: Juni-24-2024