Usuku lwePost: 20, Jun, 2022

I-3. Indlela yokusebenza kwama-superplastizers

Indlela yokunciphisa i-ejenti yokuthuthukisa ukufutheka kwengxube kakhonkolo ngokuyinhloko ifaka umphumela wokuhlakazeka nokuthambekela komphumela. I-ejenti yokunciphisa amanzi empeleni iyi-surving, ukuphela okukodwa kwe-chain ende yama-molecular kuncibilikeka kalula emanzini - iqembu le-hydrophilic, kanti elinye ukuphela kungukungaphansi kwamanzi - iqembu le-hydrophobic.

a. Ukuhlakazeka: Ngemuva kokuthi usimende uxutshwe namanzi, ngenxa yokuheha ama-molecular izinhlayiya zosekhulenti, i-cement slurry yakha isakhiwo se-floccution, ukuze ama-10% abe ngu-30% wamanzi wokuxuba asongwe izinhlayiya zensimbi futhi akwazi ukubamba iqhaza mahhala ukugeleza nokuthambisa. Umphumela, ngaleyo ndlela ethinta uketshezi lwengxube ekhonkolo. Lapho kufakwa i-ejenti yokunciphisa amanzi, ngoba amanzi anciphisa ama-molecule e-agent angahle akhiwe kahle ebusweni bezinhlayiya zokwenza usimende, ingaphezulu lezinhlayiya zensimbi linecala elifanayo (imvamisa linecala elibi), lelo Ikhuthaza ukusakazwa kwezinhlayiya zokwehla kanye nokubhujiswa kwesakhiwo se-floccution. , khipha ingxenye esongelwe yamanzi futhi ubambe iqhaza ekugelezeni, ngaleyo ndlela ukhulise ngempumelelo uketshezi lwenhlaka ukhonkolo.

b. I-Lubrication: Iqembu le-Hydrophilic ku-superplastimizer liyi-polar kakhulu, ngakho-ke ifilimu le-adsorption le-superplastimizer ebusweni bezinhlayiya zamanzi angakha i-molecule yamanzi, futhi le filimu yamanzi inokuthambisa okuhle kunganciphisa ngokuphumelelayo ukuslayida Ukumelana phakathi kwezinhlayiyana kasimende, ngaleyo ndlela kuthuthukiswe uketshezi lukakhonkolo.

Umphumela wokunciphisa amanzi kukhonkolo, njll.

a. Setha isikhathi. Ama-superplastizer ngokuvamile awanawo umphumela wokubuyisa emuva, futhi angahle akhuthaze i-hydrate kanye nokuqina kuka usimende. I-superplastizer egciniwe iyinhlanganisela ye-superplastizer ne-retarder. Ngaphansi kwezimo ezijwayelekile, ukuze kubambezele i-hydration of usimende futhi wehlise ukulahleka kwesikhumba, inani elithile le-retarder lingezwa kumanzi ancishisiwe.

b. Okuqukethwe kwegesi. Njengamanje, i-polycarboxxox lyrame esetshenziswayo inokuqukethwe kwamanzi okuthile, futhi okuqukethwe komoya kokhonkolo akufanele kube phezulu kakhulu, uma kungenjalo amandla ukhonkolo azoncishiswa kakhulu.

c. Ukugcinwa kwamanzi.

Ama-superplastizer awasondeli kakhulu ekunciphiseni ukopha kukakhonkolo, futhi kungakhulisa ukopha. Isopha ngokhonkolo iyanda lapho umthamo uwe ngokweqile.