Eco-Flex Articulating Block Mat They are identical to Ercoform but include open cells to provide environmentally compatible protection against periodic high flows. Eco-Flex mats are comprised of concrete-filled elements and unfilled areas, allowing for the establishment of riparian vegetation.Woven in such a manner as to provide a woven double-layer, joined into a matrix of rectangular compartments (blocks), each separated by an area of non-woven yarn to produce a 25% open cell mat. Ducts (grout tubes) interconnect each block, and high-strength revetment cables are installed between blocks and through the grout tubes, joining one block to the next. The non-woven areas between the blocks serve as a hinge to permit articulation, while the cables remain embedded in the concrete blocks to facilitate articulation. Technical Data Eco Flex Articulating Block Mat (EABM) Style Average Block Dimensions Average Unit Weight Block Weight Concrete Coverage Mannings 4" EABM 20" x 14" x 4" 36 lbs./sq. Ft. 90 lbs. 90 sq. ft./cy N = 0.045–0.050 Typical Range of Mix Proportions Material Mix Proportions lbs./cu. Yd. After Placement lbs./cu. Yd. Cement 750–850 810–920 Sand (FM 2.60) 2030–2120 2195–2290 Water 485–555 360–430 Air As Required N/A System 21 A versatile and eco-friendly approach to pipeline protection, it is designed for complete pipeline coverage within the creek bed utilizing Ercoform™ while promoting the growth of local riparian vegetation within the mat along the creek banks, utilizing Eco-Flex™.Designed for complete pipeline coverage within the creek bed utilizing Ercoform while promoting the growth of local riparian vegetation within the mat along the creek banks incorporating Eco-Flex. This is accomplished by a two-phase mat, where an Ercoform solid mat and an Eco-Flex open-cell mat are combined during manufacturing and inflated on-site.