Table of Contents
Does the specific gravity of cement vary for different types of cement?
Normally aggregates are derived from stockpiles, which may be exposed to various conditions. If the cement has exposed to extreme moisture content then, the specific gravity of cement will differ because of the moisture content present in the pores.
What is specific gravity in cement?
The specific gravity is normally defined as the ratio between the weight of a given volume of material and weight of an equal volume of water. The portland cement have a specific gravity of value around 3.15.
Why is specific gravity of cement determined?
The specific gravity of cement is important because it is one of the factor which determines the density of the cement. As we know that, the cement may contain lots of moisture content if it is exposed to various conditions and humidity. We all know that water cement ratio is an important factor of cement paste.
How does specific gravity affect concrete?
It was observed that the higher the specific gravity the higher the proportions of concrete. However, the higher cement-water ratio leads to the less density and weight of concrete. In addition, the cement and water content were observed to increase cement- water ratio.
What is the difference between density and specific gravity of cement?
Density is defined as mass per unit volume. It has the SI unit kg m-3 or kg/m3 and is an absolute quantity. Specific gravity is the ratio of a material’s density with that of water at 4 °C (where it is most dense and is taken to have the value 999.974 kg m-3).
What is specific gravity in construction materials?
Specific gravity is defined as the ratio of the density of the solid part of a material to the density of water at 20°C.
Why do we use specific gravity?
Significance and Use 4.1 Specific gravity is an important property of fluids being related to density and viscosity. Knowing the specific gravity will allow determination of a fluid’s characteristics compared to a standard, usually water, at a specified temperature.
Why is specific gravity important in construction?
Specific Gravity is important for several reasons. Some deleterious particles are lighter than the good aggregates. Specific gravity is critical information for the Hot Mix Asphalt Design Engineer. The value is used in calculating air voids, voids in mineral aggregate (VMA), and voids filled by asphalt (VFA).
Why specific gravity is important in construction?
The specific gravity of aggregates indirectly measures its density; hence it is the most essential parameter of strength or quality of the aggregates. It is due to higher specific gravity there would be higher compressive strength of aggregates and hence it passes on to the concrete. 02.
What is difference between gravity and specific gravity?
The ratio of mass per unit volume is known as the density of a liquid. On the other hand, specific gravity refers to the relative density of a fluid with respect to another liquid (usually water)….Difference Between Density and Specific Gravity.
| Density | Specific Gravity |
|---|---|
| The dimensional formula of density is [M L-3]. | It is a dimensionless quantity. |
Why do we use specific gravity instead of density?
Density is defined as mass per unit volume. It has the SI unit kg m-3 or kg/m3 and is an absolute quantity. Specific gravity is the ratio of a material’s density with that of water at 4 °C (where it is most dense and is taken to have the value 999.974 kg m-3). It is therefore a relative quantity with no units.
Why specific gravity of cement is important?
The specific gravity of cement is important because it is one of the factor which determines the density of the cement. As we know that, the cement may contain lots of moisture content if it is exposed to various conditions and humidity. We all know that water cement ratio is an important factor of cement paste.
What is the specific gravity of concrete?
Specific gravity is the ratio of the weight of a cubic foot of a material to the weight of a cubic foot of water, which is 62.4 pcf. Therefore, the specific gravity of a typical concrete mix is 145/62.4 or 2.32.
Why is the specific gravity of cement tested?
Specific gravity of cement is tested in order to know the various atmospheric effects on the moisture content of a cement. Generally nominal Mix design is based on the value of specific gravity of cement as 3.15. The value will change over time if the cement is exposed to various weather conditions.
What is the value of the specific gravity of cement?
Specific Gravity of Cement is nothing but the ratio between the volume of cement to the volume of the same quantity of water. Usually, the value lies between 3.10 – 3.16 g/cc. Some types of cement such as PPC, Portland Blast furnace slag will have the value near 2.90. In simple, Cement is 3.10 times heavier than the water.