Friday, December 9, 2011

Class 3 Permeable Base

The 2010 version of the Caltrans Standard Specifications now includes a Class 3 Permeable Base.  This product has been showing up in special provisions for a while but is now incorporated in the standards.  The product can be found in section 68-2.02F(4) and states the following:

"The percentage composition by weight of Class 3 permeable material in place must comply with the grading requirements shown in the following table:


Sieve sizes
Percentage passing
1-1/2"
100
1"
88–100
3/4"
52–85
3/8"
15–38
No. 4
0–16
No. 8
0–6

At least 90 percent by weight of Class 3 permeable material must be crushed particles as determined by California Test 205."

The 2010 standard specifications can be found in pdf form at http://www.dot.ca.gov/hq/esc/oe/standards.php and are now for sale in book form on the Caltrans website here.

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