���� �-�K�[��S����e�7-?��*v9�� endstream endobj 41 0 obj 309 endobj 42 0 obj << /Filter /FlateDecode /Length 41 0 R >> stream 3. Wt. Oven drying at 80°C may, however, be continued, for a longer time to ensure complete evaporation of free water present in the sample. The speedy moisture tester which is also called calcium carbide gas moisture tester provides a quick, simple means of determining the moisture content of the soil. Moisture Content Test of Dry Chemical Powder (DCP) as per imo 1432, a sample of DCP has to be tested for moisture content bi-anually. 0000007040 00000 n 11. Oven Dry Method. 0000009310 00000 n Here’s what you should do based on your results: If your subfloor is under 12% moisture and the floorboards are within range of the subfloor moisture reading, you … Sand Moisture Content Test: AIM: To determine the surface moisture of moist or wet aggregate, APPARATUS: A metal tray or frying pan; Gas stove or an electric hairdryer; Scales to measure; Procedure: 1) For coarse aggregate, a 2 kg sample is required but for the sand (fine aggregate), a 0.5 kg sample is adequate.. 2) The wet/moist sample is then weighted as wet weight (W). 3.4. In this process, measuring accuracy and the resolution of the balance are extremely important. A definitive test that measures the amount of moisture released from the concrete requires a calcium chloride kit or a relative humidity meter. Q & A about this Moisture Content Determination Method. Moisture Content is defined as the relation of the weight of water in a given volume of soil to the weight of the solid particles in that volume. �q After 72 hours, a humidity reading is taken under the plastic with a dew point hygrometer. What is Scaffolding? Wsp = moisture content as obtained by speedy moisture meter expressed as a decimal fraction. + Wt. The table below compares the two methods and provides an overview of the … Various methods for measuring the moisture content of wood are described by the American Society for Testing and Materials in publication ASTM D4442. Order) 0000009388 00000 n Where, 4. Surface vapor tests only show you the amount of moisture being released at the surface, while embedded probes only test for moisture within the slab. Wt. If you have tested the meter against these two subjective but accurate tests and the meter reads 12 percent, all is well. So that only the division sum needs to be carried out: [(30.51/22.60) – 1] x 100 = 0.35 x 100 = 35.0 % If it is suspected that gypsum is present in the soil, dry the moisture content samples at not more that 80 °C, for a longer period and report the method used. https://civilblog.org/2013/05/14/moisture-content-test-of-soil-is-2720-part-2-1973 2. gm = gram. In the solid wood products industry, we most often define moisture content on a dry basis. 0000008714 00000 n Moisture Content Determination by Speedy Moisture Tester. The moisture content is then calculated using an equation based on the weight lost during the oven drying. The dial reading is the percent of moisture by wet mass and must be converted to dry mass. Both tests are often required to fully determine the level of moisture present in a concrete floor. Note: Take a sufficient number of empty containers and mark them. In this article, you’ll learn, Moisture Content Determination of Soil by Oven and Speedy Moisture Test. The degree of compaction of the soil largely depends upon the quantity of moisture in it. With the pressure vessel in an approximately horizontal position insert the cap in the pressure vessel and seal it by tightening the clamp; taking care that no carbide comes in contact with the soil until a complete seal is achieved. An 18- 3. cont. Ans: The temperature should be 105°C +- 5°C. If the volatile content of the solid is primarily water, the LOD technique gives a good measure of moisture content. Careful consideration must also be given to maintain identical conditions, where temperature and duration are vital for generating precise and reproducible results. Q.1: At what Temperature in Centigrade, the wet soil sample should be kept in the oven? 0000010246 00000 n moisture determination to be insensitive over the range 12–20% moisture content, and therefore unsuitable for determining the end of drying (i.e. These include two oven-dry methods, a distillation, and what the standard calls other methods. By lowering the moisture content, we decide to provide or extract some water from the soil to get full compaction. 0000004154 00000 n Empty the pressure vessel and examine the material for lumps. Moisture Content = M.C = (W4/W3)x100 (%). 2. Q.1: How much in gram the soil sample is tested in the speedy moisture tester? 0000007983 00000 n As the name suggests, this method calls for small test holes to be drilled into the concrete slab at a depth 40% of the total thickness for slabs on grade (20% from each side of suspended slabs). You ’ ll learn, moisture content as obtained by speedy moisture meter the.. 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