Lub teeb yuag qhob ntxiv | Kev Ua Haujlwm Siab Ua Foaming Cov Neeg Sawv Cev Rau Cov Khoom Siv Ntawm Tes
Superplasticizer yog ib yam khoom ntxiv rau ib yam khoom lossis cov khoom siv kom nce nws qhov plasticity. Nws tuaj yeem txo dej thiab ua rau cov khoom muag dua. Nws kuj tuaj yeem nce kev ruaj khov thiab zog ntawm cov khoom.
Superplasticizers siv ua ib qho ntxiv los txhim kho zoo thiab ruaj khov ntawm pob zeb. Lawv tuaj yeem pab txhim kho kev ntws ntawm pob zeb, tiv thaiv kev cais ntawm cov hmoov av hauv ib qho suspension, thiab ncua sijhawm kev teeb tsa cement. Lawv kuj pab txo qhov permeability ntawm pob zeb.
Qee superplasticizers yog synthetic thiab qee qhov yog ntuj. Lawv feem ntau yog ua los ntawm lignosulphonate. Cov molecule ntawm superplasticizer loj dua ntau pua npaug piv rau molecule dej.
They are typically used to reduce the amount of water required in a concrete mixture. They can reduce the water-to-cement ratio, which can increase the strength and durability of the concrete. They can also reduce the shrinkage of concrete and can prolong the hydration process. They can also help in controlling the temperature of concrete in large volumes.
They are also often used as an auxiliary in plasters, Tshuaj pleev ib ce, and cleaning agents. They are commonly added to cement at about 0.5-0.3% of the weight of the cement. They are also used as an auxiliary in the production of plastic products.
The dosage of a plasticizer is determined by a Marsh Cone Test. It can vary from five to twenty liters of plasticizer per cubic meter of concrete. It is usually mixed during the mixing process and during the site pour.