Articulating Block Mat (ABM)

Articulating Block Mat (ABM) is formed with a double layer woven fabric, joined together into a matrix of rectangular compartments each separated by a narrow perimeter of interwoven fabric and containing interconnecting high strength revetment cables. Articulating Block Mat forms are positioned on the area to be protected, where they are filled with pumpable fine aggregate concrete (structural grout) to form a mattress of individual blocks in a bonded block pattern. The high strength revetment cables become embedded in the blocks to tie the blocks together and enable the revetment to resist tension in all directions. Patented separate cable duct design assures that the revetment cables will be positioned securely in the center of each block. Relief of hydrostatic uplift pressure, caused by entrapped and ground water, is provided through the narrow perimeter of interwoven fabric after the grout has hardened. Articulating Block Mat (ABM) is custom fabricated into multiple mill width panels, designed to fit actual site dimensions and topography.

Articulating Block Mat (ABM) form a mattress of individual blocks in a bonded block pattern. The revetment cables become embedded in the blocks to tie the blocks together and resist tension in all directions. Patented separate cable duct design assures that the revetment cables will be positioned securely in the center of each block. Relief of hydrostatic uplift pressure is provided through the narrow perimeter of interwoven fabric after the grout has hardened. ABM is custom fabricated into multiple mill width panels, designed to fit the actual site dimensions and topography.


DESIGN CONSIDERATIONS

ABM is used where velocities are low to high, bedload and ice formations are light to heavy and a roughness coefficient of N = 0.045 to 0.050 is acceptable.

ABM is used where wave action is light to heavy.

ABM is ideal for underwater placement.

ABM is recommended where subgrade deformation is expected.


TECHNICAL DATA

ARTICULATING BLOCK MAT(ABM)
STYLE NOMINAL THICKNESS BLOCK WEIGHT UNIT WEIGHT CONCRETE COVERAGE
3” ABM 20” x 11” x 3” 55 lbs. 35 lbs./ft2 95 sq. ft./cy
4” ABM 20” x 14” x 4” 90 lbs. 47 lbs./ft2 73 sq. ft./cy
6” ABM 20” x 20” x 6” 195 lbs. 70 lbs./ft2 49 sq. ft./cy
8” ABM 30” x 22” x 8” 420 lbs. 93 lbs./ft2 36 sq. ft./cy

INDUSTRIES

  • Highways/Bridges
  • Ports/Harbors
  • Dams/Levees
  • Rivers/Canals
  • Flood Control
  • Coastal/Marine
  • Industrial Waste Landfill
  • Mining
  • Oil/Gas Pipeline
  • Power Generation

APPLICATIONS

  • Bridge Abutments
  • Storm Sewer Outfalls
  • Channel Lining
  • Levee Protection
  • Dike Groin
  • Spillway/Weirs
  • Pipeline Shallow Cover
MATERIAL PROPERTY – ARMORFORM FABRICS
PROPERTY TEST UNITS VALUE
PHYSICAL
Composition of Yarns - - Polyester
Mass Per Unit Area (Double-Layer) ASTM D oz/yd2 14
Thickness (Single-Layer) ASTM D mils 27
Mill Width (Woven) inch 72
MECHANICAL
Wide-Width Strip Tensile Strength - WARP | FILL ASTM D 4595 lbs./inch 340/270
Elongation at Break - WARP | FILL - Max. ASTM D 4595 % 12/12
Trapezoidal Tear Strength - WARP | FILL ASTM D 4533 lbs. 180/170
Grab Tensile Strength ASTM D4632 lbf 364/310
Grab Tensile Elongation ASTM D4632 % 25/21
CBR Puncture Strength ASTM D lbs. 1525
HYDRAULIC
Apparent Opening Size (AOS)3 ASTM D 4751 U.S. Standard 20
Flow Rate ASTM D 4491 gal/min/ft2 125

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