Sunday, November 15, 2015

Quicknote

Sementing Komponen Semen :- Tricalcium Silicate, 3CaO.SiO2- Dicalcium silicate, 2CaO.SiO2- Tricalcium Aluminate, 3CaO.Al2O3- Tricalcium Aluminoferite, 4CaO.Al2O3.Fe2O3

Material Semen :

Calcareoues : limestone dan batu semenArgillaceous : clay atau mineral clay

Sifat-sifat semen :- Densitas :

Dbs= (Gbk+Gw+Ga)/(Vvk+Vw+Va)- Thickening Time dan Viskositas- Filtration Loss- Water Cement Ratio (WCR)- Waiting on Cement (WOC)- Permeabilitas- Compressive Strength dan Shear Strength

Additive semen- Accelerator : CaCl2, NaCl, gipsum- Retarder : lignosulfonat, CMHEC

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Sunday, November 15, 2015- Extender : bentonite, sodium silikat, pozzolanic material, perlite, gilsonite, dll- Weighting Agents : Hematite, barite, pasir- Dispersant : senyawa sulfonate sebagai pengencer- Fluid Loss Control Agent : polymer,

CMHEC dan latex

- Lost Circulation Control agent : cellophane flakes, gipsum, bentonite dan nut shell- Special additive : tracers, fibers, antifoam agents, silika, mud kill, dll.

Specific Gravity : SG Portland Semen adalah 3.14 gr/cc (API)Volume Absolute : volume material sendiri, diluar volume udara di sekeliling partikel

Volume Bulk : volume total material ditambah volume udara

Konsentrasi Additive : dinyatakan dalam BWOC (By Weight of Cement)

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