Lub teeb yuag qhob ntxiv | Kev Ua Haujlwm Siab Ua Foaming Cov Neeg Sawv Cev Rau Cov Khoom Siv Ntawm Tes
Thawj, take an empty bottle without a thin waist in the middle and about the same thickness as the top and bottom. Use a syringe needle to extract 30ml of pure water and inject it into the bottle.
Take another 1mm needle (0.05ml graduation), extract 1mm of the physical ua npuas ncauj tus neeg sawv cev to be measured, inject it into 30ml of water (diluted about 30 times), and shake the bottle dozens of times to fill the bottle with a lot of foam. After standing for 2 feeb, measure the height with a ruler, and record it. The height is the foaming height, which can measure the foaming ability.
After 1h, the foam height is measured again, and compared with the previous height, the difference between the two heights is the foam settling distance. The bleeding height at the bottom of the bottle is measured once, as the bleeding value, and it can also be used as a reference value for foam stability. The larger the foam drop value and bleeding value, the worse the quality. To accuracy, the test should be repeated 3 rau 5 times, at least three times, and an average of 3 times is taken.
The foam prepared above is tested for cement adaptability. Many foams produced by foaming agents are very stable when used alone. Once in the cement slurry, the defoaming is very fast and may not adapt to the cement. Or adjust to this cement and not to another glue. Yog li ntawd, a cement suitability test must be performed.
Take a small pot, weigh 500g of cement, add 275g of water (55%), stir the cement slurry by hand, stir for 3min, and measure the volume of the mud. Another person used the above method to shake the bottle at the same time. After the cement slurry is prepared, nias cov npuas los ntawm lub raj mis rau hauv ib lub thawv 100ml thiab txhuam kom tiaj, uas txhais tau tias siv 100ml npuas ncauj. Ntxiv 100ml npuas rau hauv slurry cement, sib tov rau 3 feeb, a, ntim roj rau hauv lub khob dej pov tseg, txav ob peb zaug kom sib npaug saum npoo. Sau qhov siab ntawm slurry hauv lub tais thiab suav ntim ntawm av nplaum. Qhov ntim no tshem tawm ntim pulp yav dhau los yog ntim foam nce ntxiv. Tus nqi loj dua, foam thiab cement hloov tau zoo dua.
Cie-China.org yog tus thawj coj ua npuas ncauj qhob ntxiv muab cov pob zeb ua npuas ncauj ua npuas ncauj, superplasticizer,Ua npuas ncauj qhob lub zog enhancer rau lub teeb yuag pob zeb, CLC blocks. Yog tias koj tab tom nrhiav ua npuas ncauj tus neeg sawv cev, thov koj xav tias dawb rau tiv tauj peb.