Study of Using Paper Filter Whatman no.42 for Measuring Water Retention in Cement Paste

Abstract

Abstract This paper is study about using paper filter Whatman no.42 for measuring water retention on cement paste. The research is conducted as experiment in laboratory by making two types of specimens. The first speciment is cement paste with variation of water cement ratio and the second one is foam cement paste. There are two step for measuring water retention on cement paste. The first step is specimen immersed with immersion duration (t 1 ). The second step is searching of filter paper weight to obtain water content after contact with two specimen. t 1 is time of consistency water content on specimens. The parameters (t 1 ) must be searched before measuring water retention. The result of measurement water retention be shown in a curve.Keywords water retention, filter paper, porosity, cement paste.Abstrak Penelitian ini merupakan studi tentang menggunakan kertas saring Whatman No.42 untuk mengukur retensi air pada pasta semen. Penelitian ini dilakukan sebagai percobaan di laboratorium dengan membuat dua jenis spesimen. Spesimen pertama adalah pasta semen dengan variasi rasio air semen dan yang kedua adalah pasta busa semen. Ada dua langkah untuk mengukur retensi air pada pasta semen. Langkah pertama adalah spesimen direndam dengan durasi perendaman (t 1 ). Langkah kedua adalah mencari berat kertas saring untuk mendapatkan kadar air setelah kontak dengan dua spesimen. t1adalah waktu konsistensi kadar air pada spesimen. Parameter (t 1 ) harus dicari sebelum mengukur retensi air. Hasil pengukuran retensi air ditampilkan dalam kurva.Kata Kunci retensi air, kertas saring, porositas, pasta semen.

Effects of contact time of natural cu-zeolite on the growth of Streptococcus pyogenes and Pseudomonas aeruginosa

“…42 filter paper includes quantitative filter paper, used for quantitative and gravimetric analysis, and has a pore diameter of 2.5 microns, capable of withstanding a flow pressure rate of 0.4 psi (0.0281 kg / cm 2 ), capable of withstanding a flow rate of 1870 seconds / 100 ml, with a thickness of 200 microns, and weight of 100 gram / m 2 paper. 11 Zeolite in this study used a size of 100 mesh or equivalent to 0.149 mm. This condition caused the zeolite to withstand in Whatman No.…”