Ụbọchị nbipute:9,Jan,2023

Kedu ihe bụ ndị na-ebelata mmiri?

Ndị na-ebelata mmiri (dị ka Lignosulfonates) bụ ụdị admixture nke a na-agbakwunye na ihe n'oge usoro ngwakọta.Ndị na-ebelata mmiri nwere ike ibelata ọdịnaya mmiri site na 12-30% n'emebighị ọrụ nke kọmpụta ma ọ bụ ike igwe nke ihe (nke anyị na-egosipụtakarị n'usoro ike mkpakọ).Enwere okwu ndị ọzọ maka ndị na-ebelata mmiri, nke bụ Superplasticizers, plasticizers ma ọ bụ ndị na-ebelata mmiri dị elu (HRWR).

Ụdị Admixtures na-ebelata mmiri

Enwere otutu ụdị admixtures na-ebelata mmiri.Ụlọ ọrụ ndị na-emepụta ihe na-enye aha dị iche iche na nhazi ọkwa na admixtures ndị a dị ka ihe mkpuchi mmiri, densifiers, ihe enyemaka ọrụ, wdg.

N'ozuzu, anyị nwere ike ekewa ndị na-ebelata mmiri n'ime ụdị atọ dịka ihe mejupụtara kemịkalụ ha si dị (dị na tebụl 1):

lignosulfonates, hydroxycarboxylic acid, na hydroxylated polymers.

Ebee ka Lignin si?

Lignin bụ ihe dị mgbagwoju anya nke na-anọchi anya ihe dịka 20% nke ihe mejupụtara osisi.N'oge usoro maka mmepụta nke mpempe akwụkwọ na-emepụta akwụkwọ site na osisi, a na-emepụta mmanya na-abaghị uru dị ka ngwaahịa nke nwere ngwakọta dị mgbagwoju anya nke ihe dị iche iche, gụnyere ngwaahịa decomposition nke lignin na cellulose, ngwaahịa sulfonation nke lignin, carbohydrates dị iche iche (sugars) na free sulfurous acid ma ọ bụ sulfates.

Na-esote neutralization, ọdịda na gbaa ụka Filiks na-emepụta a nso nke lignosulfonates dị iche iche ịdị ọcha na mejupụtara dabere na a ọnụ ọgụgụ nke ihe, dị ka neutralizing alkali, pulping usoro eji, ogo nke gbaa ụka na ọbụna ụdị na afọ nke osisi eji dị ka. nri pulp.

Lignosulfonates dị ka ndị na-ebelata mmiri na ihe

Lignosulfonate superplasticizer dose bụ 0.25 pasent, nke nwere ike ibute mbelata mmiri ruru pasenti 9 ruo 12 na ọdịnaya ciment (0.20-0.30%).Dịka eji ya na usoro ọgwụgwọ kwesịrị ekwesị, ike kọmpụta na-abawanye site na 15-20% ma e jiri ya tụnyere kọmpụta ntụaka.Ike tolitere site na 20 ruo 30 pasent mgbe ụbọchị 3 gasịrị, site na 15-20 pasent mgbe ụbọchị 7 gasịrị, na site na otu ego mgbe ụbọchị 28 gasịrị.

Na-agbanweghị mmiri, kọnkịtị nwere ike na-asọpụta nke ọma, na-eme ka ọ dị mfe iji rụọ ọrụ (ya bụ ịba ụba ọrụ).

Site n'iji otu tonne nke lignosulfonate superplasticizer ntụ ntụ kama ciment, ị nwere ike ịchekwa tọn 30-40 nke ciment ka ị na-ejigide otu mkpọda, ike, na ihe ntụaka.

Na ọkọlọtọ steeti, ihe gwakọtara na nke a gị n'ụlọnga nwere ike igbu oge na ọnụ ọgụgụ kasị elu okpomọkụ nke hydration ihe karịrị awa ise, ikpeazụ mwube oge nke ihe karịrị awa atọ, na mwube oge nke ihe karịrị awa atọ tụnyere ntụaka ihe.Nke a bara uru maka ịrụ ụlọ n'oge okpomọkụ, ụgbọ njem ngwa ahịa, na kọmpụta.

Lignosulfonate superplasticizer nwere micro-entraining nwere ike welie arụmọrụ nke ihe ahụ n'ihe gbasara enweghị ike ifriizi-zaze.