Why we don t use water in specific gravity test of cement?
Water is not used in testing of specific gravity of cement because cement reacts with water and form compounds. Thus , the quantities measured prior to the commencement of test will not be same after the test. Therefore kerosene which is inert (non-reactive) with cement is used.
Why the kerosene was used for the determination of specific gravity of cement?
Kerosene is used to determine the specific gravity of cement because when water is used while experimenting (testing), it starts to react with the cement and forms calcium oxide (CaO). This affects the experiment but kerosene does not react with cement and does not affect the experiment.
What is specific gravity and how is it related to density?
Specific gravity is the density of a substance divided by the density of water. Since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density (but without any units).
What is the acceptable specific gravity of cement?
Excessive presence of moisture content in cement effects Workability and strength of cement. For Nominal mix design, the specific gravity of cement should be 3.15g/cc.
What is the limit for specific gravity of cement?
3.15 g/cc
Limit: Specific gravity of cement = 3.15 g/cc.
Why specific gravity is used?
The specific gravity value of an object can be used to determine approximately where the object will float at the surface of the liquid. The SG is a percentage of an object’s volume that will be below the surface, and the remaining percentage is visible above.
What happens if specific gravity of cement is low?
Specific Gravity of Cement Formula:- If the specific gravity of the material is less than 1, then that material floats in water. If the material has a specific gravity greater than 1, then it sinks in water.
What is specific gravity of OPC cement?
Specific Gravity of OPC The OPC cement specific gravity is 3.1 to 3.16 g/cc which means cement is heavier than the water of the same volume and it sinks in water.
What is the normal range of specific gravity?
Normal Results The urine specific gravity test is easier and more convenient, and is usually part of a routine urinalysis . The urine osmolality test may not be needed. The normal range for urine specific gravity is 1.005 to 1.030. Normal value ranges may vary slightly among different laboratories.
What is specific gravity of water?
Water has a specific gravity equal to 1. Materials with a specific gravity less than 1 are less dense than water, and will float on the pure liquid; substances with a specific gravity more than 1 are more dense than water, and will sink.
What is normal urine pH?
Normal Results The normal values range from pH 4.6 to 8.0. The examples above are common measurements for results of these tests. Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples.
What is the density of OPC 53 grade cement?
This means the solid particles of cement themselves have a density of 3150 kg/m3 which is equal to 3.15 grms/ml or 3.15 g/cm3 or 3.15 kg/litre.
What is the specific gravity of PPC cement?
This study employed the effect of application of two different types of Portland cements, namely the OPC and PPC. The specific gravity of OPC used in the study was about 3.06 gr/cm3, whereas for the PPC it was around 3.08 gr/cm3.
Apa itu minyak tanah?
Dasar Teori Tambahan Minyak Tanah Minyak tanah (kerosin) merupakan campuran alkana dengan rantai C12H26–C15H32. Kerosin selain banyak digunakan dalam lampu minyak tanah, kerosindigunakan sebagai bahan bakar mesin jet (lebih teknikal Avtur, Jet-A, Jet-B, JP-4 atau JP-8).
Bagaimana cara mengatasi belerang minyak tanah?
Biasanya, minyak tanah didistilasi langsung dari minyak mentah membutuhkan perawatan khusus, dalam sebuah unit Merox atau hidrotreater, untuk mengurangi kadar belerang dan pengaratannya.
Apa itu minyak tanah cair?
Bahan bakar minyak tanah cair mengandung senyawa yang berpotensi dapat menimbulkan bahaya, termasuk heksana dan benzena. Cambridge Dictionary, Pengertian minyak tanah adalah cairan bening dengan bau menyengat yang terbuat dari batu bara atau minyak bumi dan digunakan sebagai bahan bakar pada mesin jet.
Apakah Pertamina memproduksi kerosin atau minyak tanah?
Di Indonesia, Pertamina hanya memproduksi saju jenis kerosin atau minyak tanah, dengan spesifikasi sebagai berikut: Komposisi kimia minyak tanah bergantung pada sumbernya, tapi biasanya terdiri dari sekitar 10 hidrokarbon berbeda, masing-masing mengandung 10 hingga 16 atom karbon per molekul. Rumus kimia minya tanah yaitu;