Zopangira simenti, monga konkire, matope, ndi zida zina zomangira, zimagwiritsidwa ntchito kwambiri m'nyumba zamakono. Ma cellulose ethers (monga hydroxypropyl methylcellulose (HPMC), hydroxyethyl methylcellulose (HEMC), etc.) ndizowonjezera zofunika zomwe zingathe kusintha kwambiri ntchito ya simenti. Kuti mukwaniritse bwino izi, ndikofunikira kudziwa bwino ndikuwongolera magwiridwe antchito a cellulose ethers.
1. Zinthu zoyambira ndi ntchito zama cellulose ethers
Ma cellulose ethers ndi gulu la mankhwala opangidwa kuchokera ku cellulose yachilengedwe, momwe gulu la hydroxyl limasinthidwa pang'ono ndi gulu la ether kudzera mu etherification reaction. Mitundu yosiyanasiyana ya ma cellulose ethers imatha kupangidwa molingana ndi mtundu ndi kuchuluka kwa zolowa m'malo, ndipo mtundu uliwonse uli ndi gawo losiyana muzinthu za simenti.
Kukhuthala kwa cellulose ethers:
Kukhuthala kwa ma cellulose ethers kumakhudza mwachindunji rheology ndi kukhazikika kwa phala la simenti. Ma high-viscosity cellulose ethers amatha kupititsa patsogolo kusungidwa kwa madzi ndi kulimbitsa mphamvu ya phala, koma akhoza kuchepetsa madzi ake. Low-viscosity cellulose ethers amathandizira kupititsa patsogolo magwiridwe antchito ndi madzimadzi.
Degree of substitution (DS) ndi molar substitution (MS):
Mlingo wa m'malo ndi molar m'malo mwa cellulose ethers zimatsimikizira kusungunuka kwake ndi kukhuthala kwa yankho. Kulowetsedwa kwakukulu ndi kulowetsedwa kwakukulu kwa molar nthawi zambiri kumatha kusintha kusungidwa kwa madzi ndi kukhazikika kwa ma cellulose ethers.
Kusungunuka kwa ma cellulose ethers:
Mlingo wa kusungunuka ndi kusungunuka kwa ma cellulose ether kumakhudza kufanana kwa phala la simenti. Ma cellulose ether okhala ndi kusungunuka kwabwino amatha kupanga njira yofananira mwachangu, potero kuonetsetsa kuti phala limakhala lofanana komanso lokhazikika.
2. Sankhani ma etha a cellulose oyenera
Zochitika zosiyanasiyana zogwiritsira ntchito zimakhala ndi zofunikira zosiyana pakugwira ntchito kwa ma cellulose ethers. Kusankha mtundu woyenera ndi mawonekedwe a cellulose ether kumatha kusintha kwambiri magwiridwe antchito a simenti:
Zomangira:
Mu ntchito monga zomatira matailosi ndi pulasitala matope, ma high-viscosity cellulose ethers (monga HPMC) amatha kupereka kumamatira bwino komanso kunyowa kosatha, potero kupititsa patsogolo ntchito yomanga ndi mphamvu zomangira zomaliza.
Zida zosunga madzi:
M'matope odzipangira okha ndi zomatira za simenti, ma cellulose ethers okhala ndi madzi ochuluka (monga HEMC) amafunika. Kusungirako madzi kwambiri kumathandiza kupewa kutaya madzi msanga, potero kuonetsetsa kuti hydration ikukwanira komanso nthawi yayitali yogwira ntchito.
Zothandizira:
Ma cellulose ethers omwe amagwiritsidwa ntchito kukulitsa mphamvu ya zinthu za simenti ayenera kukhala ndi dispersibility yabwino komanso mamasukidwe apakati kuti apititse patsogolo kufanana ndi kulimba kwa matrix.
3. Konzani njira yowonjezera
Kuwongolera njira yowonjezeretsa ya cellulose ether muzinthu za simenti ndikofunikira kuti ziwonjezeke bwino. Zotsatirazi ndi njira zingapo zodziwika bwino zokwaniritsira:
Premixing njira:
Sakanizani ether ya cellulose ndi zida zina zouma pasadakhale. Njira imeneyi angapewe mapangidwe agglomeration wa mapadi efa pambuyo mwachindunji kukhudzana ndi madzi, potero kuonetsetsa kubalalitsidwa yunifolomu mu slurry.
Njira yosakaniza yonyowa:
Onjezani cellulose ether ku slurry ya simenti pang'onopang'ono. Njirayi ndi yoyenera pa nthawi yomwe cellulose ether imasungunuka mwamsanga ndipo imathandizira kupanga kuyimitsidwa kokhazikika.
Njira yowonjezera yowonjezera:
Pokonzekera simenti slurry, kuwonjezera mapadi etere mu zigawo akhoza kuonetsetsa kugawa yunifolomu mu ndondomeko kukonzekera ndi kuchepetsa agglomeration.
4. Kulamulira zinthu zakunja
Zinthu zakunja monga kutentha, pH mtengo, ndi kugwedezeka kwamphamvu zimakhudza kwambiri magwiridwe antchito a cellulose ether.
Kuwongolera kutentha:
Kusungunuka ndi kukhuthala kwa cellulose ether kumakhudzidwa kwambiri ndi kutentha. Kutentha kwapamwamba kumathandiza cellulose ether kuti asungunuke mofulumira, koma kungayambitsenso kukhuthala kwa njira yothetsera vutoli. Kutentha kuyenera kusinthidwa molingana ndi momwe ntchito ikugwiritsidwira ntchito kuti zitsimikizire kuti zimagwira ntchito bwino komanso zimagwira ntchito bwino.
Kusintha kwa pH: Mtengo wa pH wa phala la simenti nthawi zambiri umakhala wamchere wambiri, pomwe kusungunuka ndi kukhuthala kwa cellulose etha kumasinthasintha ndi kusintha kwa pH. Kuwongolera mtengo wa pH mkati mwazoyenera kungathe kukhazikika kachitidwe ka cellulose ether.
Kukondoweza: Kuthamanga kwamphamvu kumakhudza kufalikira kwa cellulose ether mu phala la simenti. Kukondoweza kwakukulu kungayambitse kuyambitsidwa kwa mpweya ndi kuphatikizika kwa cellulose ether, pomwe kugwedezeka kwapang'onopang'ono kumathandizira kugawa ndi kusungunula cellulose ether.
5. Kusanthula nkhani ndi malingaliro othandiza
Kupyolera mu kusanthula kwenikweni, titha kumvetsetsa bwino kugwiritsa ntchito ndi kukhathamiritsa njira ya cellulose ether muzinthu zosiyanasiyana za simenti:
Zomatira za matailosi apamwamba kwambiri: Pamene kampani ikupanga zomatira za matailosi apamwamba kwambiri, zidapezeka kuti kusungirako madzi kwa chinthu choyambirira sikunali kokwanira, zomwe zimapangitsa kuchepa kwa mphamvu zomangira pambuyo pomanga. Poyambitsa HEMC yosungira madzi kwambiri ndikusintha kuchuluka kwake kowonjezera ndi njira yowonjezera (pogwiritsa ntchito njira yopangira premixing), kusungirako madzi ndi kugwirizanitsa mphamvu ya zomatira matayala kunakonzedwa bwino.
Zida zodziyimira pawokha: Zinthu zapansi zodziyimira pawokha zomwe zidagwiritsidwa ntchito pantchito inayake zinali ndi madzi otsika komanso osasalala bwino pambuyo pomanga. Posankha otsika mamasukidwe akayendedwe HPMC ndi optimizing kusonkhezera mlingo ndi kulamulira kutentha, fluidity ndi kumanga ntchito slurry ndi bwino, kupanga chomaliza pansi pamwamba osalala.
Kuwongolera magwiridwe antchito a cellulose ether muzinthu za simenti ndiye chinsinsi chowongolera magwiridwe antchito ndi zomangamanga. Posankha mtundu woyenera wa cellulose ether, kukhathamiritsa njira yowonjezeramo, ndikuwongolera zinthu zomwe zimakhudzidwa ndikunja, zinthu zazikuluzikulu za zinthu za simenti monga kusungirako madzi, kumamatira, ndi madzimadzi zimatha kusintha kwambiri. Muzochita zothandiza, m'pofunika kupitiriza kukhathamiritsa ndikusintha kagwiritsidwe ka cellulose ether malinga ndi zosowa zenizeni ndi zochitika zogwiritsira ntchito kuti mukwaniritse zotsatira zabwino.
Nthawi yotumiza: Jun-26-2024