Umhla wokuThumela:5,Sep,2022

Isiphumo searhente yokunciphisa amanzi ekuqhekekeni kokuqhekeka kwekhonkrithi yorhwebo:

I-agent yokunciphisa amanzi yi-admixture enokongezwa ngexesha lenkqubo yokuxuba i-concrete ukuze kuncitshiswe kakhulu okanye kuncitshiswe kakhulu amanzi okuxuba amanzi, ukuphucula umbane wekhonkrithi, kunye nokwandisa amandla ekhonkrithi. Ukuziqhelanisa kuye kwabonisa ukuba emva kokongeza i-miniderer yamanzi kwikhonkrithi, ukuba akukho mfuneko yokwandisa amandla, inani le-samente lingancitshiswa kakhulu, kwaye ukudibanisa kwekhonkrithi kunokuphuculwa. Ke ngoko, iarhente yokunciphisa amanzi yinto eyongezelelweyo eyimfuneko kwikhonkrithi yorhwebo.

Ukuze kuphuculwe ngakumbi izibonelelo zezoqoqosho zekhonkrithi yezorhwebo, abavelisi bekhonkrithi bathanda ukusebenzisa i-agent yokunciphisa amanzi kunye neendawo eziphezulu zokunciphisa amanzi ukuphucula amandla ekhonkrithi okanye ukunciphisa kakhulu inani le-samente kunye nokunciphisa iindleko zokuvelisa. Enyanisweni, oku kukungaqondi kakuhle. Nangona ukuncitshiswa kwamanzi kunenzuzo ekuphuculeni amandla okunyanzeliswa kwekhonkrithi, ukuncitshiswa kwamanzi amaninzi kuya kuchaphazela kakubi amandla e-flexural yekhonkrithi. Nangona isixa esifanelekileyo sokunciphisa amanzi kunenzuzo ekunciphiseni izinga lokunciphisa i-concrete, kufuneka kuqatshelwe ukuba xa kuyilwa umxube wekhonkrithi, umsebenzi wokunciphisa amanzi wokongeza i-arhente yokunciphisa amanzi ithathelwe ingqalelo, kwaye amanzi. -Binder ratio yenzelwe ukuba ibephantsi. Ukusetyenziswa kwamanzi kuya kwandisa i-shrinkage yokomisa ikhonkrithi kunye nokunyusa izinga lokunciphisa ikhonkrithi.

Nangona amandla oxinzelelo lwekhonkrithi yorhwebo akanciphi xa umxholo wesamente uncitshiswe kakhulu, amandla okuqina ayancipha kunye nokuncipha komthamo welitye lesamente eliqinileyo kwikhonkrithi. Ngenxa yokunciphisa inani le-samente, i-samente ye-slurry layer incinci kakhulu, kwaye i-micro-cracks iya kwenzeka kwikhonkrithi. Ngokuqinisekileyo, i-micro-cracks inempembelelo encinci kumandla oxinzelelo lwekhonkrithi, kodwa impembelelo kumandla obunzima kunye nezinye iimpawu zekhonkrithi azikwazi ukujongelwa phantsi. Ukuncitshiswa kakhulu kwemathiriyeli yesamente kuya kuchaphazela imodyuli enwebekayo kunye nokurhubuluza kwekhonkrithi, okwenza ikhonkrithi ithande ukuqhekeka.

Ukushwankathela, xa kuveliswa ikhonkrithi yezorhwebo, izinga lokunciphisa amanzi ekhonkrithi kunye nobungakanani bezinto ze-cementitious kufuneka ziqwalaselwe ngokupheleleyo, kwaye akukho kunciphisa amanzi angenamkhawulo okanye ukunciphisa ngokugqithiseleyo izinto ze-cementitious kuvunyelwe.