Tsiku Lotumiza:11,Dec,2023
Ma celluloseamagwiritsidwa ntchito mochulukira muzinthu zopangidwa ndi simenti, makamaka mumatope owuma, chifukwa cha kusungidwa kwawo bwino kwa madzi ndi kukhuthala kwawo.Choncho, katundu ndi mapangidwe limagwirira wacellulose ether zida zosinthidwa za simenti ndi kuyanjana pakaticellulose ether ndi matope a simenti pang'onopang'ono ayamba kuyang'ana kwambiri pazinthu zomanga ndi zomangamanga m'zaka zaposachedwa.Zotsatira zambiri zafukufuku zakwaniritsidwa.Kuphatikiza kafukufuku wopita patsogolo kunyumba ndi kunja, pali mavuto otsatirawa pakufufuza ndi kugwiritsa ntchitocellulose ether zida zosinthidwa za simenti:
1.Pali mitundu yambiri yama cellulose.Ngakhalema cellulose zomwe zimagwiritsidwa ntchito muzinthu zopangira simenti zimagawidwa m'mitundu yambiri monga HEC, HEMC ndi HPMC chifukwa cha kuchuluka kwawo m'malo.Mtundu womwewo wama celluloseali ndi zosiyana zambiri pamapangidwe a mamolekyu, kulemera kwa mamolekyu, kuchuluka kwa kulowetsa m'malo kapena zolowa m'malo.Pakadali pano, kafukufuku wambiri kunyumba ndi kunja amayang'ana chimodzi kapena zingapoma cellulose.Kusankha kwacellulose ether zimangotengera magawo awo ogwiritsira ntchito.The maselo kapangidwe makhalidwe ama cellulose sizikusonyezedwa, ndipo kuyimira kwawo sikuyimira.Mapeto ake ndi zotsatira zosapeŵeka za "kulowetsa pang'ono", ndipo pali zotsutsana ndi mikangano pakati pa zotsatira za mayeso.Choncho, m`pofunika mwadongosolo kuphunzira gulu ndi structural katundu ndi njira za mitundu yosiyanasiyana yacellulose ether zida zosinthidwa za gelling.
2.Mabuku omwe alipo aphunzira zotsatira zama cellulose pamitundu yosiyanasiyana ya zida za simenti, ndipo adasanthula momwe zimapangidwira, koma adalephera kudziwa mgwirizano pakati pa kapangidwe ka maselo a cell.ma cellulose ndi katundu wa kusinthidwa simenti slurry.nthawi zonse, ndipo pali kusiyana koonekeratu mumakina awo.Pakaticellulose ether- zida zosinthidwa za simenti, pali kafukufuku wochepa pazida zokhala ndi mamolekyu osiyanasiyana, omwe sangathe kufotokozera momwe mapangidwe amapangidwira zinthu zosiyanasiyana.cellulose ether-zinthu zosinthidwa za simenti..Ngakhale kuti mabuku ena anapeza zimenezoma cellulose ndi mapangidwe osiyana a maselo ali ndi zotsatira zosiyana pa hydration ya simenti, zifukwa zazikulu sizinafotokozedwenso.
3.Njira ya chikoka chacellulose ether pa simenti ya hydration kinetics ikuyenera kuphunziridwanso.Pakali pano, za kuchedwa hydration limagwirira wacellulose ether, ngakhale adsorption amaonedwa kuti ndi chifukwa chenicheni cha kuchedwa hydrationcellulose ether, akupezeka kuti mphamvu adsorption mphamvu pakati mankhwala hydration ndicellulose ether, m'pamenenso kuchedwetsedwa kwa simenti.The adsorption limagwirira pakatima cellulose ndi mankhwala simenti hydration, komanso zifukwa zosiyanasiyana adsorption mphamvu zosiyanasiyanama cellulose ndi zinthu za simenti za hydration, sizinaphunzirenso.
4.Mabuku omwe alipo akuwonetsa kutima cellulose zingakhudze kwambiri mapangidwe a pore a zipangizo zopangira simenti.Ma cellulose Zimakhulupiriranso kuti zimakhala zogwira ntchito pamtunda ndipo zimakhala ndi mpweya wopatsa mpweya pamatope atsopano a simenti, motero zimawonjezera kulimba kwa matope a simenti.Komabe, chikoka chama cellulose pa nthawi zonse ndi mapangidwe makina a simenti slurry pore kugawa kukula sikukambidwa kawirikawiri.
5. Rheological katundu ndi mbali yofunika ya ntchitoma cellulose muzinthu zopangidwa ndi simenti.Mwatsoka, pali maphunziro ochepa pa rheological katundu wacellulose ether kusinthidwa simenti slurry kunyumba ndi kunja.
Nthawi yotumiza: Dec-11-2023