Zinthu zopangidwa ndi simenti, monga konkriti, matope, ndi zipangizo zina zomangira, zimagwiritsidwa ntchito kwambiri m'nyumba zamakono. Ma ether a cellulose (monga hydroxypropyl methylcellulose (HPMC), hydroxyethyl methylcellulose (HEMC), ndi zina zotero) ndi zowonjezera zofunika zomwe zingathandize kwambiri magwiridwe antchito a zinthu zopangidwa ndi simenti. Kuti mukwaniritse makhalidwe abwino awa, ndikofunikira kudziwa ndikuwongolera magwiridwe antchito a ma ether a cellulose.
1. Katundu woyambira ndi ntchito za ethers za cellulose
Ma cellulose ether ndi gulu la mankhwala ochokera ku cellulose yachilengedwe, momwe gulu la hydroxyl limalowetsedwa pang'ono ndi gulu la ether kudzera mu etherification reaction. Mitundu yosiyanasiyana ya ma cellulose ether imatha kupangidwa malinga ndi mtundu ndi chiwerengero cha zinthu zolowa m'malo mwake, ndipo mtundu uliwonse uli ndi gawo losiyana pazinthu za simenti.
Kukhuthala kwa ethers a cellulose:
Kukhuthala kwa ma cellulose ethers kumakhudza mwachindunji rheology ndi kukhazikika kwa simenti. Ma cellulose ethers okhala ndi kukhuthala kwakukulu amatha kukonza kusunga madzi ndi mphamvu yolumikizana ya phala, koma amatha kuchepetsa kukhuthala kwake. Ma cellulose ethers okhala ndi kukhuthala kochepa amathandiza kukonza magwiridwe antchito ndi kusinthasintha kwake.
Mlingo wa kusintha (DS) ndi kusintha kwa molar (MS):
Mlingo wa kusintha ndi kusintha kwa molar kwa ma cellulose ethers umatsimikizira kusungunuka kwake ndi kukhuthala kwa yankho. Mlingo wapamwamba wa kusintha ndi kusintha kwa molar kwambiri nthawi zambiri zimatha kukonza kusunga madzi ndi kukhazikika kwa ma cellulose ethers.
Kusungunuka kwa ethers a cellulose:
Kuchuluka kwa kusungunuka ndi kusungunuka kwa ma ether a cellulose kumakhudza kufanana kwa phala la simenti. Ma ether a cellulose okhala ndi kusungunuka bwino amatha kupanga yankho lofanana mwachangu, potero kuonetsetsa kuti phalalo ndi lofanana komanso lokhazikika.
2. Sankhani ma ether oyenera a cellulose
Zochitika zosiyanasiyana zogwiritsira ntchito zimakhala ndi zofunikira zosiyanasiyana pakugwira ntchito kwa ma ether a cellulose. Kusankha mtundu woyenera ndi kufotokozera kwa ether ya cellulose kungathandize kwambiri magwiridwe antchito a zinthu za simenti:
Zomangira:
Mu ntchito monga zomatira za matailosi ndi mortars a plaster, ma ether a cellulose okhala ndi kukhuthala kwakukulu (monga HPMC) amatha kupereka kumatirira bwino komanso kunyowa kosatha, motero kumawonjezera magwiridwe antchito a zomangamanga komanso mphamvu yomaliza yomangira.
Zipangizo zosungira madzi:
Mu mortars wodzipangira okha ndi zomatira zopangidwa ndi simenti, ma ether a cellulose okhala ndi madzi ambiri (monga HEMC) amafunika. Madzi ambiri amathandiza kupewa kutayika kwa madzi msanga, motero kuonetsetsa kuti madzi akuyenda bwino komanso kuti ntchito ikhale yayitali.
Zipangizo zolimbikitsira:
Ma ether a cellulose omwe amagwiritsidwa ntchito powonjezera mphamvu ya zinthu za simenti ayenera kukhala osavuta kufalitsa komanso kukhuthala pang'ono kuti awonjezere kufanana ndi mphamvu ya matrix.
3. Konzani njira yowonjezera
Kulamulira njira yowonjezera ya cellulose ether mu zinthu za simenti ndikofunikira kwambiri kuti igwire bwino ntchito. Izi ndi njira zingapo zodziwika bwino zokonzera zinthu:
Njira yosakaniza:
Sakanizani etha ya cellulose ndi zinthu zina za ufa wouma pasadakhale. Njirayi ingapewe kupangika kwa etha ya cellulose ikakhudzana mwachindunji ndi madzi, motero kuonetsetsa kuti ifalikira mofanana mu slurry.
Njira yosakaniza yonyowa:
Onjezani ether ya cellulose ku simenti pang'onopang'ono. Njirayi ndi yoyenera pamene ether ya cellulose imasungunuka mwachangu ndipo imathandiza kupanga suspension yokhazikika.
Njira yowonjezera m'magawo:
Pokonzekera simenti, kuwonjezera cellulose ether m'magawo kungatsimikizire kuti imagawidwa mofanana panthawi yonse yokonzekera ndikuchepetsa kuchuluka kwa zinthu zomwe zimagwirizana.
4. Lamulirani zinthu zakunja
Zinthu zakunja monga kutentha, pH, ndi kuchuluka kwa kusakaniza zimakhudza kwambiri magwiridwe antchito a ether ya cellulose.
Kulamulira kutentha:
Kusungunuka ndi kukhuthala kwa ether ya cellulose kumakhudzidwa kwambiri ndi kutentha. Kutentha kwambiri kumathandiza kuti ether ya cellulose isungunuke mwachangu, komanso kungayambitse kukhuthala kwa yankho kuchepa. Kutentha kuyenera kusinthidwa malinga ndi momwe ntchitoyo imagwiritsidwira ntchito kuti zitsimikizire kuti ikugwira ntchito bwino komanso kuti igwire bwino ntchito.
Kusintha kwa pH: Mtengo wa pH wa simenti nthawi zambiri umakhala mu alkaline yambiri, pomwe kusungunuka ndi kukhuthala kwa cellulose ether kumasintha ndi kusintha kwa pH. Kulamulira mtengo wa pH mkati mwa mlingo woyenera kungathandize kukhazikika kwa cellulose ether.
Kuthamanga kwa kusakaniza: Kuthamanga kwa kusakaniza kumakhudza momwe ether ya cellulose imafalikira mu simenti. Kuthamanga kwambiri kwa kusakaniza kungayambitse kulowetsedwa kwa ether ya cellulose ndi kusonkhana kwa mpweya, pomwe kuthamanga pang'ono kwa kusakaniza kumathandiza kugawa ndikusungunula ether ya cellulose mofanana.
5. Kusanthula milandu ndi malingaliro othandiza
Kudzera mu kusanthula kwenikweni kwa milandu, titha kumvetsetsa bwino njira yogwiritsira ntchito ndi kukonza bwino etha ya cellulose muzinthu zosiyanasiyana za simenti:
Guluu wa matailosi wochita bwino kwambiri: Kampani ina ikupanga guluu wa matailosi wochita bwino kwambiri, inapeza kuti kusunga madzi kwa chinthu choyambirira sikunali kokwanira, zomwe zinapangitsa kuti mphamvu yogwirizanitsa ichepe pambuyo pomanga. Mwa kuyambitsa HEMC yosunga madzi ambiri ndikusintha kuchuluka kwake kowonjezera ndi njira yowonjezera (pogwiritsa ntchito njira yosakaniza kale), mphamvu yosunga madzi ndi yogwirizanitsa ya guluu wa matailosi inakula bwino.
Zipangizo za pansi zodzikweza: Zipangizo za pansi zodzikweza zomwe zimagwiritsidwa ntchito pa ntchito inayake zinali ndi madzi otsika komanso nthaka yosasalala bwino pambuyo pomanga. Mwa kusankha HPMC yotsika komanso kuyendetsa bwino kutentha ndi liwiro loyambitsa, madzimadzi ndi magwiridwe antchito a matope amawonjezeka, zomwe zimapangitsa kuti pansi yomaliza ikhale yosalala.
Kuwongolera magwiridwe antchito a cellulose ether mu zinthu za simenti ndiye chinsinsi chokweza magwiridwe antchito azinthu ndi kapangidwe kake. Mwa kusankha mtundu woyenera wa cellulose ether, kukonza njira yowonjezera, ndikuwongolera zinthu zakunja zomwe zimakhudza, zinthu zofunika kwambiri za simenti monga kusunga madzi, kumamatira, ndi kusinthasintha kwa madzi zitha kusinthidwa kwambiri. Muzogwiritsidwa ntchito moyenera, ndikofunikira kukonza nthawi zonse ndikusintha kagwiritsidwe ntchito ka cellulose ether malinga ndi zosowa zenizeni komanso zochitika zogwiritsidwa ntchito kuti mupeze zotsatira zabwino.
Nthawi yotumizira: Juni-26-2024