Riprap Underlayment

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While soil underneath riprap or concrete is easily washed away by sea or river waves, hard structure riprap or concrete armor must be stacked along the shoreline and riverbank to protect further damage. However, the hard armor could be collapsed due to the loss of stability. As in drainage system, geotextile can effectively place as a filter which is typically used beneath riprap or concrete armor materials in revetment and other erosion control system to keep soil in place. 
To avoid risks and danger growing upon failures, ACETex® is normally applied to prevent soil draining away while enables the permeability of water through the fabric.