DELTA®-MS 20 can be economically applied on vertical surfaces as a high capacity drainage layer between a shotcrete layer (diaphragm wall) and the structural concrete wall. The shotcrete of the diaphragm wall acts like a filter and keeps the seepage layer free from ground soil particles.
With its 20 mm studs and very high drainage capacity, DELTA®-MS 20 is ideally suited as a reliable high performance seepage and drainage layer in blind-side applications against shotcreted surfaces.
Studded membrane made of special, high-density polyethylene.
DELTA®-MS 20 can be used between shotcrete installations or diaphragm walls and cast-in-place concrete walls. The shotcrete or the diaphragm wall acts like a filter and keeps the seepage layer free from ground soil particles.
This procedure allows to:
|Product name||DELTA®-MS 20|
|Material||Recycled high-density polyethylene, encapsulated between two layers of special virgin HDPE|
|Dimple height||approx. 3/4" (20 mm)||ASTM D6364-06|
apprx. 4,270 psf (200 kN/m²)
B1 available upon request
|Flow rate / unit width @ Hydr. grad. 1; 100 kPa||41.8 gal/min/ft (528 l/min/m)||ASTM D4716-08|
|Air-gap volume between dimples||approx. 14 l/m²|
|Water Penetration Resistance||> 120 psi (815 kPa)
|Water Vapor Transmission||< 22 ng/(Pa s m²)||ASTM E96, Meth. A|
|Vapor permeance||< 0.3 perms [grains/h/ft²/in Hg]||ASTM E96, Meth. A|
|Temperature range||-22°F to +176°F (-30°C to +80°C)|
|Chemical properties||Excellent chemical resistance, resistant to root-penetration, rot-proof|
65' 7" (20 m)
6' 6" (2 m)
|Service life expectancy||
> 25 years (at pH between 4 and 9, and temperature below 25°C). Do not expose to UV light for longer than 30 days.