AASHTO T191 PDF

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. The following applies to all specified limits in this standard: Replace the sand removed in the funnel determination according to Section 4. Dig the test hole inside the opening of the base plate, being very careful to avoid disturbing the t19 that will bound the hole.

Sand Cone, Soil Density, Soil Compaction

T 1. Sand—Any clean, dry, free-flowing, uncemented sand having few, if any, particles passing the 0. Prepare the surface of the location to be tested so that it is a level plane. Care must be taken to avoid moisture loss during excavation.

Invert the apparatus aashtk seat the funnel in the recess of the base plate. Note 1—The internal diameter of the container shall be equal to or slightly less than the diameter of the opening of the base plate used with the sand-cone. Place the apparatus on the base plate, open the valve. To be acceptable the sand shall not have a variation in bulk density greater than 1 percent. The base plate is required for calibrations and testing. The valve shall have stops to prevent rotating the valve past the completely open or completely closed positions.

Calculate the volume of the test hole to the nearest 1 cm3 0. Divide the mass of the sand needed to fill the container Step 4. Position the calibration container on a clean, level, plane surface.

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Determining the bulk density of sand DB to aahto used in the field test. The mass of the sand needed to fill the container only is determined by subtracting the mass of the cone correction Step 4. The mass of sand required to fill the cone and base plate is calculated by the difference between ashto initial mass Step 4. This table shows the suggested minimum mass of the moisture content sample in relation to the maximum particle size in soil mixtures.

Density of soil, sand cone to AASHTO T191

Record the total mass m5. This relationship can be determined by dividing the in-place density by the maximum density and multiplying by The minimum test hole volumes suggested in determining the in-place density of soil mixtures are given in Table 1. Miscellaneous Equipment—Small pick, chisels, or spoons for digging test hole; mm 10 in.

Calculate the dry mass of the material to the nearest 1 g 0. Each sand-cone and matched base plate will also have a set of unique cone corrections and bulk sand densities. Drying Equipment—Stove or oven or other suitable equipment for drying moisture content samples. Soils that are essentially granular require extreme care.

Also, a balance conforming to the requirements of MClass G 2. Invert the sand-cone filled with sand and seat the funnel in the recess of the base plate.

Weigh the moist material that was removed from the test hole. The apparatus shall conform to the requirements shown in Figure 1.

1t91 the mass of the sand needed to fill the container, funnel and base plate. Balances—A balance conforming to the requirements of MClass G Place the base plate on the calibration container Note 1. Seat the base plate on the prepared surface. Calculate the dry mass of the material removed from the test hole as follows: In selecting a sand for use, several bulk density determinations should be made using the same representative sample for each determination.

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Open the valve fully, allow the sand to flow until the sand stops flowing Note 2. Weigh the apparatus with the t911 sand m6 and record.

The results obtained using these or other rapid test methods must be corrected to the values obtained in accordance with T The container shall be dimensionally approximate the largest test hold that will be dug. Washto and record the mass of the apparatus filled with sand m1 Determine the mass of sand required to fill the funnel and base plate Cone Correction.

Appreciable time intervals between the bulk density determination of the sand and its use in the field may result in change in the bulk density caused by a change in the moisture content or effective gradation. Calculate the moisture content to the nearest 0. Fill the apparatus with sand according to Section 4. Place the empty apparatus upright on a firm level surface, close the valve and fill the funnel with sand.

Open the valve and keep the funnel at least half full with sand during filling. Close the valve sharply, remove the apparatus aashtoo determine the remaining mass of the apparatus and sand m4. Subtract the final mass Step 4.