![]() ![]() Properly selected plant species can almost completely cover the entire hard surface of the ACBs, allowing them to blend in with the natural look of the project as well as water purification by absorbing nutrients and breaking down other pollutants. One of the environmental benefits of ACB erosion systems is that vertical cores and spaces can be incorporated throughout the system, which allows vegetation growth. Design resources for ACBs include the Design Manual for Articulating Concrete Block and ACB Design Spreadsheet (refs. ACBs have excellent resistance to hydraulic shear and overtopping conditions. They can be made in a variety of shapes and thicknesses, and may even be colored according to preference. 7), are not considered ACBs.Īrticulating concrete blocks are produced in accordance with ASTM D6684, Standard Specification for Materials and Manufacture of Articulating Concrete Block (ACB) Revetment Systems (ref. However, grid pavers manufactured according to ASTM C1319, Standard Specification for Concrete Grid Paving Units (ref. ACB systems are often used as an alternative to cast-in-place concrete bulkheads and slope paving, gabions, soil cement, roller compacted concrete, or rock riprap. The systems are easy to install, simple to produce, and environmentally friendly. They are either hand-placed or installed as pre-assembled mats on top of a filter layer on prepared subgrade, and act as a soil revetment.Īrticulating concrete blocks (ACBs) are an effective erosion control system used to solve a wide variety of erosion problems: Long-term durability and sustainability relies on an appropriate engineered design based on site-specific hydrological and geotechnical conditions. ![]() The interlocking property provided by the special shapes of ACBs also allows for expansion and contraction. The term “articulating” implies the ability of individual blocks of the system to conform to changes in subgrade while remaining interlocked or otherwise restrained by virtue of the block geometric interlock and/or additional system components such as cables, ropes, geotextiles, or geogrids. The blocks within the matrix must be dense and durable while providing a matrix that is flexible and porous.Īrticulating concrete block systems are used to provide protection to underlying soil materials. The filter layer may be comprised of a geotextile or properly graded aggregate or both. The system includes a filter layer underlay that allows infiltration and exfiltration to occur while providing particle retention of the soil subgrade. An articulating concrete block (ACB) system is a matrix of individual concrete blocks placed together to form an erosion-resistant overlay with specific hydraulic performance characteristics. ![]()
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