AASHTO R 73:2016 Standard Practice for Evaluation of Precast Concrete Drainage Products.
3.2. bleedout—leakage of the paste (cement, water, air, and tine aggregate particles) through form gaps and seams of the form that results in small voids or openings between coarse aggregate particles.
3.3. hug holes—bug holes are small irregular cosmetic cavities typically resulting from entrapment of air bubbles or water on the surface of formed concrete during placement and consolidation.
3.4. chip—physical damage (breakage) of the corner or edges of the product.
3.5. damage—physical harm which impairs the product’s normal performance.
3.6. dry cast/packerhead concre fe—a low water-cementi tious materials ratio concrete (zero slump) cast by a method in which the product is demolded immediately after consolidating.
3.7. honeycomb—failure of mortar to completely surround coarse aggregate in concrete, leaving empty spaces (voids) between the coarse aggregate particles.
3.8. rifling— a series of tool marks resembling spiral grooves on the interior of a round structure. These grooves are caused by the manufacturing process and are not typically an indication of insufficient reinforcement cover.
3.9. sealing suiface——arca of the joint which the gasket is capable of sealing.
3.10. semi-diy cast concrete—–grcatcr than zero slump concrete that is consolidated with or without vibration in which the product is demolded once the concrete stiffens to the point where it can stand on its own.
3.11. slab off—a result of separation (delamination) of freshly placed concrete, prior to initial set, which typically occurs at a steel reinforcement plane.
3.12. spall—The chipping or splintering of a localized area of cured concrete (usually in a circular or oval shape) breaking loose from the steel reinforcement plane.
3.13. wet cas concrete— greater than zero slump concrete that is consolidated with or without vibration in which the product is demolded after reaching a specified stripping and handling strength.
4. ACCEPTABLE DEFECTS IN PRECAST CONCRETE PRODUCTS
4.1. Minor defects, which do not affect the performance or design life of the product as described in Sections 4.2 through 4.8. will not be cause for rejection or repair.
4.2.1. Fractures or cracks not passing through the wall or joints, or a single end crack less than 2 in. in length at either end of a pipe, unless these defects exist in more than 5 percent of the entire shipment or delivery, shall be acceptable.
4.3. Acceptable Cracksfor Reinforced Pipe:
4.3.1. A single end crack that does not exceed the depth of the joint as, shown in Figure 3, shall be acceptable.AASHTO R 73 pdf download.