Nleba anya n'ihe gbasara nhazi onwe onye

Ngwakọta na-ebuli onwe onye, ​​​​ihe ndị dị oke mkpa na injinịa ụlọ ihe owuwu ọgbara ọhụrụ, bụ nke a na-emepụta site na simenti Portland, ezigbo aggregates, polymers na-arụ ọrụ, na mgbakwunye pụrụ iche. Ngwongwo na-ebuli onwe ha pụrụ iche na-esite na slurry dị elu na-emepụta mgbe agwakọtara ya, nke nwere ike ịdo n'okpuru ike ndọda na-akpaghị aka iji mepụta ntọala dị nro na ọkpụrụkpụ sitere na 3mm ruo 50mm.

Ngwa a na-ahụkarị gụnyere ụlọ ọrụ mmepụta ihe (dịka ọmụmaatụ, ala dị elu nke ọma na ụlọ ọrụ nrụpụta ụgbọ ala), oghere azụmahịa (dịka ọmụmaatụ, nnukwu ụlọ na-eguzogide akwa na nnukwu ụlọ ahịa), yana ọrụ obibi dị elu (dịka ọmụmaatụ, nhazi ọkwa maka sistemu ikpo ọkụ n'okpuru ala).

Uru Owuwu

E jiri ya tụnyere usoro ịgbazinye ngwa ngwa ọdịnala, ogige ndị na-ebuli onwe ha na-eme ka arụmọrụ ụlọ na-arụ ọrụ site na 40%-60%. Njirimara ọgwụgwọ ngwa ngwa ha na-ebelata oge oru ngo, na-eme ka ha dị mma maka "ihe owuwu abalị - nnyefe ụbọchị na-esote" na ọrụ mmezigharị.

Kedu ihe kpatara eji HPMC n'ime nhazi nke onwe? Kedu ka arụmọrụ si dị?

a. Iwu Njide mmiri

Ngwakọta ụmụ irighiri HPMC na-ekesa mmiri site na njikọ hydrogen, na-etolite netwọkụ nwere akụkụ atọ nke na-abawanye njigide mmiri ngwa agha karịa 90% (tụnyere 75% na-enweghị HPMC). N'ebe okpomọkụ dị elu (> 30 ° C), ịhọrọ HPMC nwere okpomọkụ gelation ≥65 ° C na-egbu oge evaporation nke mmiri, na-egbochi ike ọnwụ n'ihi ezughị ezu ciment hydration.

b. Nkwalite Ngwongwo Rheological

• Njikwa usoro: HPMC dị ala (dịka ọmụmaatụ, 400Mpas) na-ebelata nrụgide mkpụrụ, na-enweta ụkpụrụ mbido mbụ nke 180-220mm maka nhazi onwe onye dị mkpa (3-5mm); ụdị viscosity dị elu (dịka, 15000Mpas) kwalite thixotropy, na-egbochi mkpokọta sedimentation na nnukwu ihe owuwu (10-50mm) iji hụ njupụta otu.

• Mmetụta Synergistic: Mgbe ejikọtara ya na polycarboxylate ndị na-ebelata mmiri, HPMC na-egbochi nkewa. Na 0.3% onye na-ebelata mmiri na 0.12% HPMC, nkwụsị nke nkeji 30 ≤10%, na-ezute ihe ndị chọrọ oge na-adabere na oge maka nhazi onwe onye.

c. Mgbochi na mgbawa

Site na igbu oge hydration ciment (ịgbatị oge ntọala mbido site na nkeji 15 ruo 30), HPMC na-ebelata nrụgide mbido mmalite site na 30%.N'ime ule ihicha nkụchi, ngwa agha nwere HPMC na-egosipụta ọnụego mbelata ụbọchị 28 nke 0.018%, nke dị ala karịa 0.035% maka ihe nlele na-abụghị HPMC, na-ebelata obere mkpọwa nke ọma.

Otu esi ahọrọ HPMC ziri ezi iji dakọtara dị iche iche nrụpụta ihe nrụpụta nke onwe?

Industrial-ọkwa HPMC na-nkewa site viscosity nke ha 2% aqueous ngwọta n'ime ala-viscosity ( 30000Mpas) ụdị, na-eri nri dị iche iche ewu chọrọ.

Usoro igodomaka ihe owuwu dị iche icheIhe atụ

Ihe Nlereanya Nhazi (Nhazi nke dabere na Gypsum):Ihe mejupụtara: α-hemihydrate gypsum 60%, calcium carbonate 30%, quartz ájá (80-120 mesh) 10%; Ihe mgbakwunye: HPMC (20000mPa·s, 0.18%), retarder (tartaric acid, 0.05%), onye na-ebelata mmiri (melamine dabeere, 0.3%.(Nke a bụ naanị maka nkọwa gị) 

Mmechi

Dị ka isi ihe mgbakwunye na-arụ ọrụ n'ime ogige na-eme ka onwe ya,HPMCna-emetụta arụmọrụ ihe onwunwe n'oge nkwadebe, ihe owuwu, na ndụ ọrụ. Na-abawanye na-achọrọ maka nkenke n'ala n'ime ụlọ mmepụta ihe,HPMCnhọrọ na teknụzụ ngwa ga-abụ nke a nụchara anụcha na ọgụgụ isi.