713_05_TOPSOIL_MDT_Specification.pdf

2014 EDITION MISCELLANEOUS MATERIALS – 713

713.05 TOPSOIL

Furnish topsoil meeting Table 713-4 gradation requirements.

TABLE 713-4

TOPSOIL GRADATION REQUIREMENTS

Fraction Particle Size (mm) Max. % Of Soil

(-10 Mesh) (2mm) Fraction

Sand 0.05-2.0 85 Silt 0.005-0.05 80 Clay less than 0.005 50 Gravel larger than 2.0 max. % of total sample1

Notes:

1. A maximum of 20% is allowable. Any quantity exceeding 10% is not included in the basis for payment. Gradation is tested in accordance with AASHTO T 88.

Meet the following:

1. Soil pH between 5.5 and 8.0 or up to 8.5 if the exchangeable sodium is less than 10%;

2. Soil conductivity factor less than 4; and

3. Organic content between 1% and 20%.

Topsoil is sampled and tested in accordance with MT 412.