The ASTM standards are available in the lab and in the reference section of the Webster Library. Before each session the student is urged to read the lab description and consult the references, which provide background information that will assist in the completion of the tests. Some procedures have been altered to allow the tests to be completed within the lab session. The laboratory sessions are based on current ASTM International specifications. The laboratory sessions provide "hands-on" experience with building materials to complement the lectures. The purpose of this course is to examine the physical properties of the materials, which must be taken into account during the design process. General Instructions to Students Engineering Materials is a course that both Civil and Building Engineering students are required to complete. Fill the bottle with kerosene up to the top and weigh the flask for counting W4.I I. Weigh the flask with cement and kerosene. Mix well to remove the air bubbles in it. Add Kerosene to the cement up to the top of the bottle.Next, fill the cement on the bottle up to half of the flask around 50gm and weigh with its stopper.
#Specific gravity lab report pdf free#
The Flask should be free from the liquid that means it should be fully dry.Followings are the four steps to be followed to perform specific gravity test of cement: The specific gravity test procedure contains only four steps. Specific Gravity Test Procedure for Cement Le-Chatelier Flask of 250 ml or Specific Gravity Bottle / Pycnometer of 100 ml.Required Materials & Apparatusįollowings are the specific gravity test apparatus and materials: Determination of specific gravity of cement at the site level can be easily done using this is an experiment. One can easily determine the value of specific gravity of cement using Le Chatelier Flask method.
#Specific gravity lab report pdf how to#
How to Calculate Cement Specific Gravity? The specific gravity of kerosine is 0.79 g/cc. But kerosene won’t show any reaction when it mixed with cement. Because cement hydrates and forms calcium oxide when it reacts with water. But if “Cement” is used as a sample substance then kerosine would be the reference substance. For gases, it is air at room temperature 25☌. And its temperature should be near at 4☌. Maximum time water is used as a reference substance. Reference Substances for Specific Gravity The specific gravity value of portland cement is generally around 3.15 while the specific gravity value of portland-blast-furnace-slag and portland-pozzolan cements may have specific gravities near 2.90. Standard Value of Specific Gravity of Cement The presence of excessive moisture is the reason for finding a lot of lumps in old cement is due to content in it. Cement becomes useless once it is hydrated with water. Cement undergoes a chemical reaction when it is reacted with the atmospheric moisture this process is termed as hydration. If the specific gravity value reaches 3.19, then the pores in cement are filled with the moisture. If the cement covered by extreme moisture content due to bad weather conditions, then the specific gravity of cement may go up to 3.19. And a material becomes useless when any void present in the material. Because the specific gravity is greater than 1.Įvery material consists off so many little pores, which may contain voids in it. By this statement, we can ensure that cement 3.1-3.16 times heavier than water of the same volume. The specific gravity of cement ranging from 3.1 to 3.16 g/cc. So if the specific gravity of any substance is known to us we can use the materials in suitable place of any work.īasically, specific gravity defines that the substance is how much heavier than water or reference substance of the same volume. If the specific gravity Is less than 1 it floats in water. If the specific gravity is greater than 1, then it sinks in water.
All of the materials in our environment have a fixed specific gravity. And we can know the material will sink or floats in the water. We calculate specific gravity of any substance to know the behavior of the material in water. Source: Why We Calculate Specific Gravity of Any Substance Because the mass or density will be changed of the substance or reference substance. If the volume does not remain same the specific gravity has no existence then. Specific Gravity of cement is the ratio of the density or mass of cement to the density or mass of a reference substance.īut in both of the state's density or mass, the volume should be same. On the other words, it is the ratio of the mass of a substance to the mass of a reference substance. Mainly Specific Gravity is the is the ratio of the density of a substance to the density of a reference substance at a fixed temperature.
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