Kusankha njira ya dry-mixed mortar additive cellulose

Chimodzi mwa kusiyana kwakukulu pakati pa matope osakaniza owuma ndi matope achikhalidwe ndikuti matope osakaniza owuma amasinthidwa ndi zochepa zowonjezera mankhwala. Kuonjezera chowonjezera chimodzi pamatope owuma a ufa kumatchedwa kusinthidwa koyambirira, kuwonjezera zowonjezera ziwiri kapena zingapo zimatchedwa kusinthidwa kwachiwiri. Ubwino wa matope owuma a ufa umadalira kusankha kolondola kwa zigawo ndi kugwirizanitsa ndi kugwirizanitsa zigawo zosiyanasiyana. Chifukwa zowonjezera mankhwala ndi okwera mtengo, ndipo zimakhudza kwambiri ntchito youma ufa matope. Choncho, posankha zowonjezera, kuchuluka kwa zowonjezera ziyenera kuperekedwa patsogolo. Zotsatirazi ndizofotokozera mwachidule za njira yosankhidwa ya chemical additive cellulose ether.

Cellulose ether imatchedwanso rheology modifier, chosakaniza chomwe chimagwiritsidwa ntchito posintha mawonekedwe a matope osakanikirana, ndipo amagwiritsidwa ntchito pafupifupi mtundu uliwonse wa matope. Zotsatirazi ziyenera kuganiziridwa posankha zosiyanasiyana ndi mlingo wake:

(1) Kusunga madzi pa kutentha kosiyana;

(2) makulidwe zotsatira, mamasukidwe akayendedwe;

(3) Ubale pakati pa kusasinthasintha ndi kutentha, ndi chikoka pa kusasinthasintha pamaso pa electrolyte;

(4) Mawonekedwe ndi digiri ya etherification;

(5) Kupititsa patsogolo matope a thixotropy ndi kuyika mphamvu (izi ndizofunikira pamatope opaka utoto pamtunda);

(6) Kutha kwa liwiro, mikhalidwe ndi kutha kwa kutha.

Kuwonjezera pa kuwonjezera pa cellulose ether (monga methyl cellulose ether) ku matope a ufa wouma, polyvinyl acid vinyl ester akhoza kuwonjezeredwa, ndiko kuti, kusinthidwa kwachiwiri. Zomangamanga za inorganic (simenti, gypsum) mumtondo zimatha kutsimikizira kulimba kwamphamvu, koma zimakhala ndi zotsatira zochepa pamphamvu yamakomedwe ndi mphamvu zosinthika. Polyvinyl acetate imapanga filimu yotanuka mkati mwa ma pores a mwala wa simenti, zomwe zimathandiza kuti matope azitha kupirira katundu wopindika kwambiri ndikuwongolera kukana kuvala. Kuyeserera kwatsimikizira kuti kuwonjezera kuchuluka kwa methyl cellulose ether ndi polyvinyl acid vinilu ester kuti youma matope a ufa amatha kukonza matope opaka utoto wopaka mbale, pulasitala matope, matope okongoletsa, ndi matope opangira midadada ya konkriti ya aerated. kuthira pansi, etc. Kusakaniza awiriwo sikungangowonjezera ubwino wa matope, komanso kumapangitsanso bwino ntchito yomanga.

Pogwiritsira ntchito, kuti muwonjezere ntchito yonse, m'pofunika kugwiritsa ntchito zowonjezera zambiri pamodzi. Pali mulingo woyenera kwambiri wofananira chiŵerengero pakati pa zowonjezera. Malingana ngati mlingo wa mlingo ndi chiŵerengero chiri choyenera, amatha kupititsa patsogolo ntchito ya matope kuchokera kuzinthu zosiyanasiyana. Komabe, pamene ntchito yekha, zotsatira kusinthidwa pa matope ndi ochepa, ndipo nthawi zina ngakhale zoipa zotsatira, monga kuwonjezera mapadi yekha, pamene kuwonjezera cohesiveness wa matope ndi kuchepetsa mlingo wa delamination, kwambiri kuonjezera kumwa madzi a matope ndi. sungani mkati mwa slurry, zomwe zimabweretsa kuchepa kwakukulu kwa mphamvu yopondereza; Pamene wothira mpweya-entraining wothandizila, ngakhale mlingo wa stratification matope akhoza kuchepetsedwa kwambiri, ndi kumwa madzi komanso kwambiri yafupika, koma compressive mphamvu ya matope amakonda kuchepa chifukwa cha thovu zambiri mpweya. Pofuna kupititsa patsogolo ntchito ya matope a miyala yamtengo wapatali kwambiri, ndipo panthawi imodzimodziyo kupewa kuvulaza katundu wina wa matope, kusasinthasintha, kusanjika ndi mphamvu ya matope a zomangamanga ayenera kukwaniritsa zofunikira za polojekitiyi ndi luso loyenera. mfundo. Pa nthawi yomweyo, palibe laimu phala ntchito, kupulumutsa Pakuti simenti, kuteteza chilengedwe, ndi zina zotero, m`pofunika kuchita zinthu zonse, kupanga ndi ntchito gulu admixtures pa maganizo kuchepetsa madzi, kukhuthala kuwonjezeka, kusunga madzi ndi thickening, ndi air-entraining plasticization.