Filling Bug Holes In Concrete Walls

We ve got a dispute on a poured wall placement regarding acceptable bug hole size.

Filling bug holes in concrete walls. These include form facing material and condition release agent type and application thickness concrete mix characteristics and placing and consolidation practices. While many variables must be considered in the elimination of surface voids or bug holes in concrete castings there are a number of precautions that can remedy this unsightly problem. Improper vibration will either insufficiently liberate the voids or over consolidate the concrete resulting in segregation and bleeding. Bug holes commonly occur in vertical cast in place concrete such as walls columns beams etc.

Careful preparation and methodical practices can eliminate even the worst of surface voids. How to eliminate voids in a concrete casting. Air entrapped during concrete placement and consolidation. According to aci 347 04 guide to formwork for concrete bug holes are surface voids in concrete defined as small regular or irregular cavities that usually do not exceed 15 mm in diameter.

Filling bug holes in concrete walls. Sealing basement walls and filling bigger holes. Section 5 3 7 3 repair of surface defects other than tie holes instructs the con tractor to outline honeycombed or otherwise defective concrete with a 1 2 to 3 4 in. Filling holes in block.

Repairing bugholes concrete construction. Three main factors contribute to this condition improper vibration practice non permeable formwork and mix design. They are the result of the entrapment of air bubbles in the surface of formed concrete during placement and consolidation. Both the number and size of bug holes vary and depend on many factors.

Aci 116r 90 cement and concrete terminology defines bug holes as small regular or irregular cavities usually not exceeding 15 mm 0 60 inch in diameter. Concrete section 5 3 3 3 b for a smooth form finish instructs the contractor to patch tie holes and defects. Filling holes in concrete block. Deep saw cut and remove such concrete down to sound concrete.

Also known as blow holes bug holes are small air bubble voids on the surface of formed concrete. A proper amount of vibration sends both entrapped air and excess water to the free surface of the concrete either vertically winding through the matrix or laterally in a direct route to the form wall. Filling furring strip holes in block foundation wall dryloc question.