A na-eji cellulose ethers, karịsịa hydroxypropylmethylcellulose (HPMC) na methylhydroxyethylcellulose (MHEC), mee ihe dị ka ihe mgbakwunye cementitious na ngwa owuwu.N'ịbụ ndị a maara maka ihe ndị na-ejigide mmiri ha, ihe ndị a nwere ike ime ka arụ ọrụ, rheology na ike njikọ nke ihe cimenti.Otú ọ dị, mmetụta ha na hydration ciment adịghị apụta ìhè mgbe niile.
Mmiri ciment na-ezo aka mmeghachi omume kemịkalụ n'etiti mmiri na ihe cimentious iji mepụta ngwaahịa hydration dị ka calcium silicate hydrate (CSH) na calcium hydroxide (Ca (OH) 2).Usoro a dị oke mkpa maka mmepe nke ike igwe na ịdịte aka.
Mgbakwunye nke cellulose ethers na ihe cimenti nwere ike inwe mmetụta dị mma na nke na-adịghị mma na usoro hydration.N'otu aka ahụ, ọrụ njigide mmiri nke cellulose ether nwere ike ịkwalite ciment ka ọ nọgide na-enweta mmiri maka mmeghachi omume, si otú ahụ na-abawanye ọsọ ọsọ na ogo hydration.Nke a na-ebelata oge nhazi, na-eme ka mmepe ike dịkwuo elu ma na-eme ka njirimara zuru oke nke ihe ahụ dị mma.
Cellulose ether nwekwara ike ime dị ka colloid na-echebe iji gbochie nchịkọta na nhazi nke simenti.Nke a na-ebute microstructure na-edobe anya na nke kwụsiri ike, nke na-eme ka ihe ndị na-arụ ọrụ na-arụ ọrụ na-adịgide adịgide nke kọnkịrị.
N'aka nke ọzọ, iji cellulose ethers na-emebiga ihe ókè nwere ike imetụta hydration ciment na-adịghị mma.N'ihi na ether cellulose bụ akụkụ nke hydrophobic, ọ na-egbochi ntinye mmiri n'ime ihe gelling, na-ebute hydration na-egbu oge ma ọ bụ ezughị ezu.Nke a na-ebute mbelata ike na ịdịte aka nke ihe ahụ.
Ọ bụrụ na ntinye nke cellulose ether dị oke elu, ọ ga-etinye ohere na slurry ciment nke ga-ejupụta na cement.N'ihi ya, mkpokọta ihe siri ike nke slurry ga-ebelata, na-eme ka ihe ndị na-arụ ọrụ na-ebelata.Ethers cellulose karịrị akarị nwekwara ike ime dị ka ihe mgbochi, na-egbochi mmekọrịta dị n'etiti cement particles na mmiri, na-eme ka usoro hydration na-ebelata.
Ọ dị mkpa iji chọpụta ọnụọgụ cellulose ether kacha mma iji mee ka njirimara nke ihe gelled dị mma ma na-ezere mmetụta ọjọọ ọ bụla na hydration.Ọnụ ego ahụ na-adabere n'ọtụtụ ihe, dị ka ụdị cellulose ether, ihe mejupụtara ciment, mmiri-ciment ratio na ọnọdụ ọgwụgwọ.
Cellulose ethers, karịsịa HPMC na MHEC, nwere ike inwe mmetụta dị mma na hydration ciment, dabere na ntinye ha na kpọmkwem ihe mejupụtara nke cimenti.A ghaghị iji nlezianya tụlee ọnụ ọgụgụ cellulose ether eji eme ihe iji nweta ihe ndị a na-achọsi ike n'emebighị ihe ndị dị na kọmpụta.Site n'iji ya eme ihe nke ọma na njikarịcha ya, cellulose ethers nwere ike inye aka na mmepe nke ihe owuwu na-adịgide adịgide, na-adịte aka na nke na-adịgide adịgide.
Oge nzipu: Ọgọst-23-2023