Superplasticizer(I)

Ụbọchị nbipute: 9, Mee, 2022

(一) The adaptability nkepolycarboxylate superplasticizer na ihe simenti:

Na omume, a chọpụtala naPolycarboxylate Superplasticizernwere nsogbu mgbanwe doro anya na simenti dị iche iche na ụdị ihe mgbakwunye ịnweta ịnweta, na mgbe ụfọdụ, ha na-adọrọ nnọọ mmasị. Ntughari n'etiti ciment napolycarboxylate superplasticizer a ga-emetụta ọtụtụ ihe. Dị ka: akụkụ ciment, ebe elu kpọmkwem, ọdịnaya alkali, ọdịnaya gypsum na ụdị dị iche iche nwere mmetụta na ngbanwe nkePolycarboxylate Superplasticizer.

Ebe saturation nkePolycarboxylate Superplasticizern'ihi na simenti dị iche iche dị iche iche, ọnụ ọgụgụ mbelata mmiri na-ebelata, mbelata nke ihe na-eme ka ihe na-abawanye, ihe omume nke "bean curd residue" na-apụta mgbe ihe na-adịghị slurry, na nsogbu nke ọbara ọgbụgba, sedimentation na segregation, na ihe isi ike na mgbapụta. , Na-enwe mmetụta maka usoro onunu ogwu, enweghị ike imeghe ihe ahụ ma ọ bụ hapụ ya oke. Dịka ọmụmaatụ, ọdịnaya nkepolycarboxylate superplasticizer n'ihi na ciment bụ 1.8% (ọdịnaya siri ike nke 10%) iji nweta ala na-eju afọ, ebe ciment B kwesịrị ka a gwakọta ya na 2.2% iji nweta ọnọdụ ka mma, na mgbe ụfọdụ mgbe ọ gafere 2.2% % nke usoro onunu ogwu, ngwakọta ihe ngwakọta. na-enwekarị ọbara ọgbụgba.

Ugbu a, na okwu nke adaptability nkePolycarboxylate Superplasticizer, ihe ngwọta bụ ndị a:

(1) Na premise nke n'ịhụ ike nke ihe, site ukpụhọde ájá ọnụego, size ruru nke keadighi rarii mkpokọta, na-amụba ego nke ihe usoro slurry;

(2) Nne mmanya na-ejikọta ya na ether lipids na usoro onunu ogwu na-abawanye nke ọma. N'ozuzu, a na-atụ aro na ethers na lipids 5: 5 nwere mmetụta dị mma, na dose kwesịrị ịbawanye site na 0.2%;

(3) Tinye ma ọ bụ gbanwee ihe ndị mejupụtara ya n'ụzọ kwesịrị ekwesị, jiri ihe ndị na-eme ka ikuku dị ka SJ, Degussa DY, foam stabilizer AR, K12, na-amụba ọnụ ọgụgụ nke ndị na-ejigide slump, jiri sodium gluconate, sugar, phosphate, ATMP, citric acid, starch emezigharịrị na ndị ọzọ mejupụtara retarders, na-eji soluble cellulose, xanthan gum, dextrin, gbanwetụrụ. thickener soluble, ma ọ bụ ịgbakwụnye "sulfur" ma ọ bụ "alkali" na ihe nwere ike imeziwanye;

(4) Gbanwee ihe owuwu molekul nke polycarboxylic acid, ma mezie ihe ụfọdụ n'ime usoro njikọ iji dozie ngbanwe ya.

Maka admixtures, mmetụta nke uyi ofufe doro anya karịa nke slag ntụ ntụ. N'ikwu okwu n'ozuzu, uyi ijiji na ọkwa nke mbụ nwere ezigbo mgbanwe, ebe ash ufe nke abụọ na nke atọ na-adịkarị mfe na-adabaghị adaba, karịsịa ash ijiji ọkwa nke atọ. Mgbe uyi àgwà adịghị mma, mmetụta nke ịba ụba nke usoro onunu ogwupolycarboxylate superplasticizerKa oge na-aga, enweghị ike imeziwanye nke ọma. Isi ihe mere nke a onu bụ na carbon ọdịnaya nke secondary na tertiary ada uyi na elu mgbanye ọnwụ bụ ibu, na adsorption ike nke carbon ahụ na admixtures bụ nnukwu, si otú mbenata adsorption nke admixtures na ciment, na-emetụta Concrete fluidity. Mgbe ị na-eji ọkwa III ofufe uyi, mụbaa ọdịnaya nke polycarboxylate mmiri reducer karịa 50%, iji nweta mbelata mmiri ọnụego mgbe agwakọta ọkwa otu ada uyi. N'ihu uyi ijiji taa nwere àgwà mgbagwoju anya na ihe dị iche iche dị iche iche, ọ dị mkpa iji mee ka njikwa mma dị ike ma wusie ule ahụ ike mgbe ị na-eji ya. polycarboxylate superplasticizer.