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ASTM C90/C140 Test Report

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Attached is test result just received from Twining Laboratories who is in business for over 100 years.
https://www.twininginc.com/about-us/history/
They went pick up 9 Filter Pavers from our yard in Carson city themselves. It is only 9 miles away from their lab.

Amazing average Net psi at 4,400! (ASTM C90/C140)
It surpasses Standards for Concrete Masonry Units requirements.

We can make even higher psi value with improved specification. A 2013 testing result done by NCMA (National Concrete Masonry Association) rated Rechsand pavers at 7,350 psi.

http://www.ncma-br.org/pdfs/5/TEK%2001-01F.pdf/

Average concrete – 2,700 to 5,500 psi
Porous concrete – 2,700 to 3,000 psi

http://www.perviouspavement.org/engineering.html
Quote: In the laboratory, pervious concrete mixtures have been found to develop compressive strengths in the range of 500 to 4000 psi (3.5 MPa to 28 MPa), which is suitable for a wide range of applications. Typical values are about 2500 psi (17 MPa).

ICPI requirement:
https://www.icpi.org/paving-systems/concrete-pavers/installation
Quote: This pavement structure is commonly used for both pedestrian and vehicular applications. Pedestrian areas, driveways, and areas subject to limited vehicular use are paved with units 2 3/8 in. (60 mm) thick. Streets and industrial pavements should be paved with units at least 3 1/8 in. (80 mm) thick.

The dimension of our Filter Paver tested is W=5.88 H=2.55 L=11.76 which meets first requirement.
We can custom make specifically for the second requirement or any other sizes.

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