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AASHTO T191 PDF

Standard Method of Test forDensity of Soil In-Place by the Sand-Cone Method AASHTO Designation: T 1. SCOP. AASHTO. 1). T – Density of Soil In-Place by the Sand-Cone. Method. 2). T – Correction for AASHTO T Section 4 and is summarized as follows: 1). Find the most up-to-date version of AASHTO T at Engineering

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The apparatus described here represents a design that has proven satisfactory.

Close the valve sharply, remove the apparatus and determine the mass of the apparatus and the remaining sand m2. Replace the sand removed in the funnel determination according to Section 4. Seat the base plate on the prepared surface. This relationship can be determined by dividing the in-place density by the maximum density and multiplying by The following applies to all specified limits awshto this standard: Miscellaneous Equipment—Small pick, chisels, or spoons for digging test hole; mm 10 in.

Determining the bulk density of sand DB to be used xashto the field test.

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aashtp Calculate the mass of the sand needed to fill the container, funnel and base plate. Calibration Container—A sturdy cylindrical container of known volume Vc.

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Calculate the dry in-place dry density of the material removed from the test hole as follows: When the sand stops flowing into the apparatus, close the valve sharply and empty the excess sand Note 2. Note 2—Vibration of the sand during any mass-volume determination may increase the bulk density of the sand and decrease the aazhto of the determination.

Fill the apparatus with sand according to Section 4. Determine the bulk density of the calibration sand sand calibration factor. Prepare the surface of the location to be tested so that it is a level plane. The azshto shall have stops to prevent rotating the valve past the completely open or completely closed positions.

Place the r191 on the base plate, open the valve. Calculate the volume of the test hole to the nearest 1 cm3 0.

Sand Cone Density Apparatus, H

Open the valve fully and keep open until the sand stops flowing Note 2. Open the valve fully, allow the sand to flow until the sand stops flowing Note 2. After the sand has stopped flowing, close the valve Note 2.

Zashto table shows the suggested minimum mass of the moisture content sample in relation to the maximum particle size in soil mixtures. Record the total mass m5. Divide the mass of the sand needed to fill the container Step 4.

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Density of soil, sand cone to AASHTO T191

Dig the test hole inside the opening of the base plate, being very careful to avoid disturbing the soil that will bound the hole. The base plate is required for calibrations and testing.

Weigh the apparatus with the remaining sand m6 and record. Balances—A balance conforming to the requirements of MClass G Weigh the moist material that was removed from the test hole. Place the base plate on a clean, level, plane surface. In selecting a sand for use, several bulk density determinations should be made using the same representative sample for each determination. Place the empty apparatus upright on a firm level surface, close the valve and fill the funnel with sand.

The mass of the sand needed to fill the container only is determined by subtracting the mass of the cone correction Step 4. Mix the material thoroughly and secure and weigh a representative sample for moisture determination.