Mumatope osakaniza okonzeka, pang'ono chabe ya cellulose ether imatha kusintha kwambiri ntchito yamatope onyowa. Zitha kuwoneka kuti cellulose ether ndi chowonjezera chachikulu chomwe chimakhudza ntchito yomanga matope. Kusankha ma etha a cellulose amitundu yosiyanasiyana, ma viscosity osiyanasiyana, kukula kwa tinthu tating'ono, madigiri osiyanasiyana a viscosity ndi kuchuluka kwake kumakhalanso ndi zotsatira zosiyanasiyana pakuwongolera matope owuma. Pakali pano, matope ambiri omanga ndi pulasitala ali ndi katundu wosasunga madzi. Madzi amadzimadzi adzalekanitsa atasiya okha kwa mphindi zingapo. Choncho, ndikofunika kwambiri kuwonjezera cellulose ether kumatope a simenti. Tiyeni tiwone mwatsatanetsatane ntchito za cellulose ether mumatope a simenti!
1.Ma cellulose ether-water retention
Kusungirako madzi ndi chinthu chofunikira kwambiri cha cellulose ether, komanso ndi malo omwe opanga matope ambiri am'nyumba, makamaka omwe ali m'chigawo chakumwera ndi kutentha kwambiri, amalabadira. Popanga zida zomangira, makamaka matope osakaniza owuma, ether ya cellulose imagwira ntchito yosasinthika, makamaka popanga matope apadera (matope osinthidwa), ndi gawo lofunikira komanso lofunikira.
Kukhuthala, mlingo, kutentha kozungulira ndi kapangidwe ka cellulose ether zimakhudza kwambiri momwe madzi amasungira. Pansi pazikhalidwe zomwezo, kukulirakulira kwa kukhuthala kwa cellulose ether, ndikokwanira kusunga madzi; Kuchuluka kwa mlingo, kumapangitsa kuti madzi asungidwe bwino. Nthawi zambiri, kachulukidwe kakang'ono ka cellulose ether kumatha kusintha kwambiri kuchuluka kwamadzi posungira matope. Mlingo ukafika pamlingo wina, chizolowezi chowonjezera madzi osungira madzi chimachepa; kusungirako madzi kwa cellulose ether nthawi zambiri kumachepa ndi kuwonjezeka kwa kutentha kozungulira, koma ma ether ena osinthidwa a cellulose amakhalanso ndi madzi osungira bwino pansi pa kutentha kwakukulu; ma cellulose ether okhala ndi digiri yotsika m'malo amakhala ndi magwiridwe antchito abwinoko osungira madzi.
Magulu a hydroxyl pa ma cellulose ether molecules ndi maatomu a okosijeni pazitsulo za ether adzapanga mgwirizano wa haidrojeni ndi mamolekyu amadzi, kutembenuza madzi aulere kukhala madzi omangika, motero akugwira ntchito yabwino yosungira madzi; kusakanikirana kwapakati pakati pa mamolekyu amadzi ndi ma cellulose etha maselo unyolo amalola mamolekyu amadzi kulowa mkati mwa cellulose etere macromolecular unyolo ndikukhala ndi zopinga zamphamvu, motero kupanga madzi aulere ndi madzi opindika, potero kuwongolera kusungidwa kwamadzi kwa simenti slurry; mapadi ether bwino rheological katundu, porous maukonde kapangidwe ndi osmotic kuthamanga kwa mwatsopano simenti slurry, kapena filimu kupanga katundu wa mapadi etero kulepheretsa kufalikira kwa madzi.
2.Cellulose ether-thickening ndi thixotropy
Ma cellulose ether amapatsa matope onyowa kukhuthala kwabwino kwambiri, komwe kumatha kukulitsa luso lolumikizana pakati pa matope onyowa ndi matope oyambira, ndikuwongolera magwiridwe antchito a matope a anti-sag. Amagwiritsidwa ntchito kwambiri popaka matope, matope omangira matayala komanso makina otsekera pakhoma. The thickening zotsatira za mapadi efa kungathenso kuonjezera kubalalikana kukana ndi homogeneity wa zipangizo zatsopano, kupewa delamination zakuthupi, tsankho ndi magazi, ndipo angagwiritsidwe ntchito CHIKWANGWANI konkire, pansi pa madzi konkire ndi kudziona compacting konkire.
Kukhuthala kwa cellulose ether pazida zopangira simenti kumachokera ku viscosity ya cellulose ether solution. Pazifukwa zomwezo, kuwonjezereka kwa kukhuthala kwa cellulose ether, kumapangitsanso kukhuthala kwa zinthu zosinthidwa za simenti. Komabe, ngati mamasukidwe akayendedwe ndi okwera kwambiri, zingakhudze fluidity ndi operability wa zinthu (monga kumatira pulasitala mpeni). Mitondo yodzipangira yokha ndi konkriti yodzipangira yokha yomwe imafunikira madzi ambiri amafunikira kukhuthala kochepa kwa cellulose ether. Kuphatikiza apo, kukhuthala kwa ma cellulose ethers kumawonjezera kufunikira kwa madzi pazinthu zopangira simenti ndikuwonjezera zokolola zamatope.
High-viscosity cellulose ether amadzimadzi njira ali mkulu thixotropy, amenenso ndi khalidwe lalikulu la mapadi ether. Amadzimadzi zothetsera methylcellulose zambiri pseudoplastic, sanali thixotropic otaya katundu m'munsimu gel osakaniza kutentha, koma kusonyeza Newtonian otaya katundu pa otsika kukameta ubweya mitengo. Pseudoplasticity imawonjezeka ndi kuwonjezeka kwa kulemera kwa maselo kapena kuchuluka kwa cellulose ether, mosasamala kanthu za mtundu ndi mlingo wa kulowetsa m'malo mwake. Choncho, ma cellulose ethers a kalasi yofanana ya viscosity, kaya MC, HPMC, kapena HEMC, nthawi zonse amawonetsa zizindikiro zofanana za rheological malinga ngati ndende ndi kutentha kumasungidwa nthawi zonse. Kutentha kumawonjezeka, gel osakaniza amapangidwa ndipo othamanga kwambiri a thixotropic amapezeka.
Mkulu woipa ndi otsika mamasukidwe akayendedwe cellulose ethers amasonyeza thixotropy ngakhale pansi pa kutentha gel osakaniza. Katunduyu ndiwopindulitsa kwambiri posintha masinthidwe ndi kugwa kwa matope omangira pomanga. Tikumbukenso kuti kukhuthala kwa kukhuthala kwa cellulose ether, ndi bwino kusunga madzi, koma kukhuthala kwapamwamba, kumapangitsanso kulemera kwa maselo a cellulose ether, ndipo kusungunuka kwake kumachepa moyenerera, komwe kumakhudza kwambiri. kuchuluka kwa matope ndi ntchito yomanga.
3.Ma cellulose ether-air entraining effect
Ma cellulose ether ali ndi mphamvu yolumikizira mpweya pazinthu zatsopano za simenti. Ma cellulose ether ali ndi magulu onse a hydrophilic (magulu a hydroxyl, magulu a ether) ndi magulu a hydrophobic (magulu a methyl, mphete za glucose). Ndi surfactant ndi pamwamba ntchito motero amakhala mpweya entraining kwenikweni. Mpweya wolowetsa mpweya wa cellulose ether udzatulutsa "mpira", womwe ukhoza kupititsa patsogolo ntchito ya zipangizo zatsopano zosakanikirana, monga kuonjezera pulasitiki ndi kusalala kwa matope panthawi yogwira ntchito, zomwe zimapindulitsa pakupanga matope; idzawonjezeranso kutulutsa kwamatope ndikuchepetsa mtengo wopangira matope; koma zidzawonjezera porosity ya zipangizo zowumitsidwa ndikuchepetsa mphamvu zawo zamakina monga mphamvu ndi zotanuka modulus.
Monga surfactant, mapadi efa alinso wetting kapena lubricating zotsatira pa simenti particles, amene pamodzi ndi mpweya entraining zotsatira kumawonjezera fluidity wa zipangizo simenti ofotokoza, koma thickening zotsatira kuchepetsa fluidity. Zotsatira za cellulose ether pa fluidity ya zinthu zochokera simenti ndi kuphatikiza plasticization ndi thickening zotsatira. Nthawi zambiri, pamene mlingo wa cellulose ether ndi wotsika kwambiri, umawoneka ngati pulasitiki kapena kuchepetsa madzi; pamene mlingo ndi mkulu, thickening zotsatira za mapadi ether kumawonjezeka mofulumira, ndipo mpweya entraining zotsatira zake amakonda machulukitsidwe, kotero kumaonekera thickening kwenikweni kapena kuchuluka kwa madzi amafuna.
4.Ma cellulose ether-retarding effect
Ma cellulose ether adzatalikitsa nthawi yokhazikika ya phala la simenti kapena matope ndikuchedwetsa mphamvu ya simenti ya hydration, yomwe imapindulitsa kuonjezera nthawi ya operability ya zinthu zatsopano zosakaniza ndikusintha kutayika kwa nthawi yodalira matope ndi kugwa kwa konkire, koma kungathenso. kuchedwetsa ntchito yomanga.
Nthawi yotumiza: Sep-24-2024