Ọmụmụ gbasara mmetụta Superplasticizer na Njirimara ihe

Mmetụta usoro nke superplasticizer na ihe onwunwe

Superplasticizer bụ n'ezie ụdị ihe eji ewu ụlọ, n'iji ụfụfụ na ụfụfụ na ihe ndị ọzọ sol egosipụta, ma ha nwere njirimara dị iche iche na usoro nhazi, Ihe kpatara ya bụ ionic superplasticizer. Mgbe ịgbakwunye superplasticizer na ihe ngwakọta, superplasticizer ga-adsorb n'elu simenti irighiri. N'ozuzu, gbasara 80% nke superplasticizer ga-adabasị site na ciment irighiri, ka ha wee nwee ike ịnọgide na-enwe ọnọdụ nchịkọta ogologo oge na-enweghị mgbasa. Mgbe ọ naghị agbakwunye superplasticizer, kọnti ga-enwe ụfọdụ ego nke gas ọdịnaya (gbasara 2%), kpụrụ site size nke afụ bụ ahaghị nhata, na nkesa bụ nnọọ enweghị isi. Mgbe ịgbakwunye superplasticizer na ihe, nkesa nke ihe parameters nwere ike ịnọgide na-enwe ezigbo ihe onwunwe ma melite ọrụ arụmọrụ nke ihe, dị ka ike tensile nke konkịtị. E wezụga, na-agbakwunye superplasticizer na ihe ngwakọta ga-enyere aka belata oriri mmiri na ngwakọta ihe. Obere afụ ikuku sol nke emepụtara ga-enyere aka mejupụta obere pores n'ime kọmpụta, budata melite mgbochi permeability nke ihe, na welie ya ọgwụ mgbochi corrosion na mgbochi ịka nká ike. Enwere ike itinye superplasticizer n'ime njem mmiri n'efu nke ihe dị n'ime, nke na-enyere aka ibelata nrụgide superplasticizer static ma welie nguzogide nke kọnkịrị ka ọ bụrụ okirikiri friza ugboro ugboro.. Superplasticizer nwere ike belata ọsọ mmeghachi omume hydration nke simenti n'etiti na n'oge ogbo, mee ka ike ciment dịkwuo mma ma kwalite ọrụ mgbochi mgbasawanye ya. Ya mere, mgbe agwakọta ihe, na mgbakwunye na-atụle ájá, nkume, ciment na ihe ndị ọzọ a na-emekarị, mgbakwunye kwesịrị ekwesị nke ụfọdụ ego nke superplasticizer iji meziwanye ojiji nke arụmọrụ ihe.

1) Mmetụta nke superplasticizer na mkpọda nke kọnkịrị agwakọta ọhụrụ

Mgbe nyochaa workability na fluidity nke ihe, index nke ukwu bụ slump. Ọnụ ahịa ka ukwuu, mma na fluidity nke ihe. Ọnwụ slump na-ezo aka na ọdịiche dị n'etiti slump slump a tụrụ ọzọ ka oge ụfọdụ gasịrị na ọdịda mbụ ya.. Ihe na-emetụta ya gụnyere ciment, njirimara mkpokọta na mmiri-ciment ruru, wdg. Ụdị superplasticizer bụkwa isi ihe na-emetụta ya. Na mmalite 30min, usoro naphthalene superplasticizer nwere nnukwu mfu mkpọda ihe, aza ajụjụ maka 60%, sochiri melamine usoro superplasticizer agent (30%) na polycarboxylic acid usoro superplasticizer (20%), nke gosiputara na polycarboxylic acid series superplasticizer nwere ihe nchebe kacha mma slump. Site na usoro nhazi ya, ngalaba nke polycarboxylic acid superplasticizer na ihe onwunwe ga-adaba n'elu ciment, dị ka trapezoidal ụzọ na-ahapụ ciment molekul polymer adsorption oyi akwa kpụrụ site electrostatic repulsion ọzọ dispersive mmetụta., welie nkwụsi ike ya, ya mere ihe na-agbakwunye polycarboxylic acid usoro mgbe superplasticizer gasịrị, nwere ike ibelata mfu slump nke ukwuu.

(2) Mmetụta nke superplasticizer na ike mkpakọ nke ihe agwakọtara ọhụrụ.

Ike nke ihe mejupụtara ụdị superplasticizer dị iche iche nwere mmetụta dị iche iche. Site na itinye superplasticizer, nwere ike budata ibelata ịgwakọta nke ihe Ịgwakọta mmiri oriri, melite ogo hydration nke ciment, melite ihe ọ bụla afọ (3 d, 7 d na 28 d) ike, nwere ike si atọ mejupụtara elu arụmọrụ superplasticizer nke ihe mkpakọ ike bụ budata elu karịa nke oghere ihe mkpakọ ike., 3 d, 7 d, na 28 d ike mkpakọ abawanye ọnụego dị elu ka 15%, 20%, na 30% n'otu n'otu. E wezụga, ụdị kọnkịta nwere ike mkpakọ kacha elu na mbido mbụ bụ kọnkịrị agwakọta ya na polyhydroxy acid superplasticizer, na mkpakọ ike uru bụkwa nke kasị elu mgbe 28 ụbọchị. Agbanyeghị, ihe mejupụtara naphthalene usoro superplasticizer nwere obere mkpakọ ike na mmalite ogbo, nke na-egosi na ọrụ ike mmalite ya adịghị mma.

(3) Mmetụta nke superplasticizer na arụ ọrụ mgbawa nke mbụ nke kọmpat agwakọtara ọhụrụ

Mmeghachi omume anụ ahụ na nke kemịkalụ ga-eme n'etiti ihe na admixtures, simenti, na admixtures. Otu ụdị superplasticizer dị na kọmpụta nke ụfọdụ ebe simenti na-etolite obere mkpọda, na-apụta n'ụdị simenti ọzọ mana nnukwu mfu nwere ike ịpụta, adịghị adị ya mere superplasticizer nke nwere mmetụta dị mma na ụdị ciment ọ bụla. Na n'ezie nwale nke ihe àgwà, Ihe nleba anya nke a na-ejikarị eme ihe na-agụnye slump na ike, ma ọ dị mfe ileghara olu kwụsie ike nke ihe, mfe ịkpalite n'oge shrinkage cracks, nwere ike mee ngwangwa ihe mgbawa, na-emetụta ịdịte aka na nchekwa nke ihe owuwu ụlọ. Site na ihe ndị na-emetụta mmalite mgbawa nke ihe ahụ, na mgbakwunye na ọsọ ifufe na ọnọdụ okpomọkụ, ụdị na ego nke admixture bụkwa ihe dị ezigbo mkpa.

Nnwale ahụ na-egosi na obosara mgbape kachasị na mpaghara mgbawa nke ihe nke melamine dabeere na superplasticizer bụ nke kacha nta., n'ime nke ebe mgbape bụ naanị 76% nke dabara uru nke polycarboxylic acid superplasticizer na 52% nke dabara uru nke naphthalene superplasticizer. Obosara mgbape kacha bụ naanị ihe 40% nke kwekọrọ na uru nke polycarboxylic acid na naphthalene superplasticizer. N'oge mgbape mgbawa nke ihe, mmetụta nke admixture dịgasị iche iche adịghị mkpa, nke metụtara admixture mejupụtara na ihe ndị ọzọ.

(4) Mmetụta nke superplasticizer na ịdịte aka nke ihe a gwakọtara ọhụrụ

Superplasticizer na ịdịte aka nke ihe nwere mmetụta ka ukwuu, tumadi gosipụtara dị ka: (1) mmetụta nke ihe ntu oyi mebie eguzogide. N'ihi ntakịrị mmiri-ciment ruru, ka mma ifriizi-thaws eguzogide nke ihe. Site na ịgbakwunye superplasticizer nwere mmetụta ọnyà ikuku, a na-emewanye nguzogide oyi-ịza oyi nke ihe. Ekwesịrị ịchịkwa olu ikuku ikuku n'ihe dịka 2%, na kacha ekwesịghị gafere 6%. Ma ọ bụghị ya, ike na ịdịte aka nke kọnk ga-emetụta nke ọma.

(2) mmetụta nke ihe impermeability. Mmiri-ciment ruru, dị ka isi ihe na-emetụta impermeability nke ihe, ọ bụrụ na ọnụ ahịa ya karịrị 0.55, ọ ga-akarị oriri mmiri nke ciment hydration wee mepụta ọtụtụ oghere na-agba ọbara na kọmpụta, na-amụba permeability nke ihe. Ọ bụrụ na oke mmiri-ciment dị ntakịrị, na workability nke ihe ga-emetụta na mgbochi permeability nke ihe ga-adversely emetụta.

Cie-China.org bụ ndị na-eduga ụfụfụ ihe mgbakwunye na-enye ihe na-enye ihe na-emepụta ụfụfụ, superplasticizer,ụfụfụ ihe ike enhancer maka fechaa kọmpat, Ihe mgbochi CLC. Ọ bụrụ na ị na-achọ ihe na-afụ ụfụ, biko nweere onwe gị kpọtụrụ anyị.