Ụbọchị nbipute: 19, Disemba, 2022

Superplasticizers nwere ike ibelata mmiri a na-eji na-agwakọta ihe site na opekata mpe 10%, ma ọ bụ mee ka ọnụ ọgụgụ kọnkịrị na-erute nke ukwuu. Maka ihe dị afọ 3 ụbọchị, ike nke 砼C30 nwere ike ịbawanye site na 69 mpa, na ike siri ike na ụbọchị 28 na-abawanye na ọ dịkarịa ala 87 mpa. A na-ejikarịsuperplasticizersbụ tumadi polyalkyl aryl sulfonates na melamine mmiri na-ebelata ihe.

Mmetụta nkesuperplasticizers on concrete arụmọrụ bụ tumadi dị ka ndị a:

1. N'ihe gbasara njirimara nke ihe ọhụrụ agwakọta. Maka mmetụta mbelata mmiri nke superplasticizer, ekwesịrị ịtụle nha molekụla na ụdị nhazi nke ihe na-ebelata mmiri ejiri mee ihe. Mmetụta ikuku ọbara nke onye na-ebelata mmiri na-emetụta oke esemokwu nke ngwọta mmiri. Ka ikike elu dị elu na-ebelata, otú ahụ ka mmetụta ikuku na-agbapụta na-apụta ìhè karị. N'ihe gbasara oge nhazi ihe, naphthalene na melamine nwere ike ịkwalite oge coagulation nke ihe, na sulfmate superplasticizer nwere ike belata oge nhazi. Ọ bụ ezie na superplasticizer adịghị eme mgbanwe dị iche iche simenti, ojiji nkesuperplasticizers nwere ike ibelata nkewa na ọbara ọgbụgba phenomena. Enwere ike imezi slump nke ihe ahụ site na mgbakwunye nke superplasticizer. A na-ekpebi oge nkwụsịtụ na oke kpọmkwem site na paramita dị ka ụdị na ọnụọgụ nke onye na-ebelata mmiri na-eji.

2. Mmetụta na hardening Njirimara nke ihe. Simenti na-etinye superplasticizer nwere ike melite ogo hydration. The ihe mkpakọ na ekwe ike na-mma.Superplasticizers na-ebelata ọnụ ọgụgụ nke ciment site n'ịgbanwe uru shrinkage nke ihe ahụ. Otú ọ dị, mgbanwe na telescopic uru n'ozuzu adịghị gafere ọkọlọtọ uru nke 1X10-4.

3. Mmetụta na ịdịte aka nke ihe. Onye na-ebelata mmiri na-arụ ọrụ nke ọma nke ọma

na-eme ka ihe ndị na-egbochi oyi na-eme ka ihe na-eme ka ihe na-egbuke egbuke dịkwuo mma n'ihi oke mbelata mmiri na ọnụọgụ nke ikuku ọbara. Na elu-arụmọrụ mmiri mbenata nwere ike n'ụzọ dị irè imezi ike nke kọnkịtị iguzogide sulfuric acid corrosion. Nnwale egosiwo na nguzogide sulfric acid corrosion nke superplasticizer adịghị njọ karịa nke oghere oghere.

4. Mmetụta nchebe mgbochi corrosion nke ígwè ígwè. Concrete na elu-arụmọrụ mmiri reducer nwere ike ijikọ nke ọma na ígwè ogwe, na adhesion nke ogologo-slide ígwè na 7D ihe nwere ike imeziwanye site 1.2MPA ka 8.5MPA. Enwere ike ịbawanye nchara nke agbagọ na 7D ihe site na 15MPA ruo 27.5MPA. Superplasticizer nwekwara ike ichebe nchara dị na kọmpụta nke ọma.