Kuchulukitsa kwa cellulose ether

Cellulose etherimapangitsa matope onyowa kukhala ndi mamasukidwe abwino kwambiri, omwe amatha kukulitsa luso lolumikizana pakati pa matope onyowa ndi gawo loyambira, ndikuwongolera magwiridwe antchito a matope a anti-sag. Amagwiritsidwa ntchito kwambiri popaka matope, matope akunja akunja ndi matope omangira njerwa. The thickening zotsatira za mapadi efa kungathenso kuonjezera homogeneity ndi odana ndi kumwazikana mphamvu mwatsopano osakaniza simenti zochokera zipangizo, kupewa delamination, tsankho ndi magazi a matope ndi konkire, ndipo angagwiritsidwe ntchito CHIKWANGWANI konkire, pansi pa madzi konkire ndi kudzipangira compacting konkire. .

Ma cellulose ether amawonjezera kukhuthala kwa zinthu zopangidwa ndi simenti kuchokera ku viscosity ya cellulose ether solution. Mlozera wa "kukhuthala" nthawi zambiri umagwiritsidwa ntchito poyesa kukhuthala kwa ma cellulose ether solution. Kukhuthala kwa cellulose ether nthawi zambiri kumatanthawuza njira ya cellulose ether yokhala ndi ndende inayake (monga 2%). Liwiro (kapena liwiro lozungulira, monga 20 rpm), mtengo wa viscosity woyezedwa ndi chida choyezera (monga viscometer yozungulira).

Viscosity ndi gawo lofunikira pakuwunika momwe cellulose ether imagwirira ntchito. Kuchuluka kwa kukhuthala kwa cellulose ether solution, kumapangitsanso kukhuthala kwa zinthu zopangidwa ndi simenti, kumamatira kwa gawo lapansi, komanso kulimba kwamphamvu kwa anti-sagging ndi anti-kubalalitsidwa. Ngati mamasukidwe ake ndi okwera kwambiri, amakhudza kutha kwa madzi ndi kugwira ntchito kwa zinthu zokhala ndi simenti (monga mipeni yomata pomanga matope). Choncho, mamasukidwe a cellulose ether omwe amagwiritsidwa ntchito mumatope osakaniza owuma nthawi zambiri amakhala 15,000 ~ 60,000 mPa. S-1, matope odziyimira pawokha ndi konkriti yodzipangira yokha, yomwe imafunikira kuchuluka kwamadzimadzi, imafunikira kukhuthala kochepa kwa cellulose ether.

Kuphatikiza apo, kukhuthala kwa cellulose ether kumawonjezera kufunikira kwa madzi pazida zopangira simenti, potero kumawonjezera zokolola zamatope.

Kukhuthala kwa njira ya cellulose ether kumadalira izi:

Kulemera kwa maselo (kapena digiri ya polymerization) ndi kuchuluka kwa cellulose ether, kutentha kwa yankho, kumeta ubweya ndi njira yoyesera.

1. Kuchuluka kwa ma polymerization a cellulose ether, kuchuluka kwa maselo olemera, komanso kukulitsa kukhuthala kwake kwamadzimadzi;

2. Kukwera kwa mlingo (kapena ndende) ya cellulose ether, kumapangitsanso kukhuthala kwake kwamadzimadzi, koma kusamala kuyenera kutengedwa kuti musankhe mlingo woyenera mukamagwiritsa ntchito, kuti musasokoneze ntchito ya matope ndi konkire ngati mlingo ndi wapamwamba kwambiri;

3. Monga zamadzimadzi zambiri, kukhuthala kwa cellulose ether solution kudzachepa ndi kuchuluka kwa kutentha, ndipo kuchuluka kwa cellulose ether kumapangitsanso kutentha kwambiri;

4. Ma cellulose ether solution nthawi zambiri amakhala pseudoplastic, omwe amakhala ndi kumeta ubweya wa ubweya. Kuchuluka kwa kumeta ubweya wa ubweya panthawi yoyesedwa, kumachepetsa kukhuthala.

Choncho, kugwirizana kwa matope kudzachepetsedwa chifukwa cha mphamvu yakunja, yomwe imakhala yopindulitsa pakumanga matope, kotero kuti matope akhoza kukhala ndi ntchito yabwino komanso yogwirizana panthawi yomweyo. Komabe, yankho la cellulose ether liwonetsa mawonekedwe amadzimadzi a Newtonian pamene ndende imakhala yotsika kwambiri komanso kukhuthala kwake kumakhala kochepa. Pamene ndende ikuwonjezeka, yankho lidzawonetsa pang'onopang'ono makhalidwe a pseudoplastic fluid, ndipo kumtunda kwa ndende, kumakhala koonekeratu pseudoplasticity.