Ma cellulose ether ali ndi vuto linalake lochepetsa matope. Ndi kuwonjezeka kwa mlingo wa cellulose ether, nthawi yoyika matope imatalika. Kuchedwetsa kwa cellulose etha pa phala la simenti makamaka kumadalira kuchuluka kwa m'malo mwa gulu la alkyl, pomwe silikukhudzana pang'ono ndi kulemera kwake.
Kuchepa kwa kuchuluka kwa alkyl m'malo, kumapangitsa kuti hydroxyl ichuluke, komanso kuchedwetsa kowonekera. Ndipo kuchuluka kwa mlingo wa cellulose ether, m'pamenenso kuchedwetsa kwa filimu yovuta kwambiri pakutha kwa simenti koyambirira, kotero kuti kuchepetsako kumawonekeranso.
Mphamvu ndi imodzi mwazofunikira pakuwunika momwe machiritso a zinthu za simenti zopangidwa ndi simenti zimapangidwira. Pamene mlingo wa cellulose ether ukuwonjezeka, compressive mphamvu ndi flexural mphamvu ya matope adzachepa. Mphamvu yomangirira yomangika ya matope a simenti osakanizidwa ndi cellulose ether imapangidwa bwino; The flexural ndi compressive mphamvu ya matope simenti yafupika, ndipo waukulu mlingo, m'munsi mphamvu;
Pambuyo kusakaniza hydroxypropyl methyl cellulose ether, ndi kuwonjezeka kwa mlingo, flexural mphamvu ya simenti matope choyamba kumawonjezeka ndiyeno amachepetsa, ndi compressive mphamvu pang`onopang`ono amachepetsa. Mlingo woyenera kwambiri uyenera kuyendetsedwa pa 0.1%.
Cellulose ether imakhudza kwambiri magwiridwe antchito amatope. Ma cellulose ether amapanga filimu ya polima yokhala ndi kusindikiza pakati pa simenti ya hydration particles mu dongosolo lamadzimadzi, lomwe limalimbikitsa madzi ambiri mu filimu ya polima kunja kwa particles za simenti, zomwe zimathandiza kuti hydration yonse ya simenti ikhale yabwino, motero kuwongolera mphamvu zomangira. wa phala pambuyo kuumitsa.
Pa nthawi yomweyi, kuchuluka koyenera kwa cellulose ether kumawonjezera pulasitiki ndi kusinthasintha kwa matope, kumachepetsa kusasunthika kwa malo osinthika pakati pa matope ndi mawonekedwe a gawo lapansi, ndipo kumachepetsa kutsetsereka kwa mphamvu pakati pa mawonekedwe. Pamlingo wina, mgwirizano pakati pa matope ndi gawo lapansi umakulitsidwa.
Komanso, chifukwa cha kukhalapo kwa mapadi etere mu phala simenti, wapadera mawonekedwe kusintha zone ndi mawonekedwe wosanjikiza aumbike pakati pa matope particles ndi mankhwala hydration. Izi mawonekedwe wosanjikiza zimapangitsa mawonekedwe kusintha zone kusinthasintha ndi zochepa okhwima. Chifukwa chake, zimapangitsa kuti matope akhale ndi mphamvu zomangira zolimba.
Nthawi yotumiza: Jun-02-2023