![]() 3.15g/cc means the cement is 3.15 times heavier than the water of the same volume. If the value is greater than 1, then the material will sink. If the value is less than 1, then the material will float on water. The value is normally in digits like 0.1 100. This specific gravity of portland cement (without voids between particles) is. Every material has some specific gravity. A comparative estimate of operating costs was prepared by analyzing data from plants using clays and shales to produce lightweight aggregates. This specific gravity of cement is a need for mixture-proportioning calculations. Based on the results of bench-scale tests and the similarity to conventional LWA production, the conceptual design of an SLA processing plant was formulated. When the same sequence of tests was performed using a slag from which the bulk of the char had been removed, the concrete test cylinders showed an improved relationship between strength and density. Conventional ULWAs are manufactured by pyroprocessing perlite or vermiculite ores and have unit weights in the 5-12 lb/ ft, with a compressive strength of 3100 psi, which meets the requirements specified in ASTM C 330 for lightweight aggregate of a comparable density. ConclusionĬompare your values with standard values from the type of cement used and give your comments on the suitability of using cement samples for construction purposes.This research was aimed at testing and developing the expansion potential of solid residues (slag) from gasification of Illinois coals to manufacture ultra-lightweight aggregates (ULWA). Weighing machines must be checked before use. After sieving, the cement must be removed from the bottom surface of the sieve gently.ģ. The cleaning of the sieve should be done very gently with the help of a brush.Ģ. Percent weight retained on sieve (W 1/W x 100)ġ. Iv) Weigh the residue left on the sieve after 15 minutes.Īccording to IS: 269 specifies that the maximum residue after sieving through 90 Micron sieve should be limited to 10% by weight for Ordinary Portland Cement and 5% by weight for Rapid Hardening Portland Cement. ![]() A mechanical sieve device also can be used. Iii) Continuously sieve the sample giving circular and vertical motion for a period of 15 minutes. Ii) Break down the lumps in the sample with a finger. Apparatus: a) Le Chatelier Flask or Specific. I) Weight accurately 100 grams of cement and place it on a standard IS 90 Micron. Object: To determine the specific gravity of cement using Le Chatelier Flask or Spcefic.
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