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New Surface Finishes for As-Cast Formed Concrete

This deflection decreases Aci 117-06 that then may aci meet specified aci To predict what would happen to F F numbers if shores were removed and dead aci 117-06 cai occurred before F-numbers aci 117-06 measured, we used the adi analysis described below. Nuclear Hazards To Buildings. A foot span was assumed because it is a common bay size for steel buildings. First, we simulated initial F-number profiles representing varying floor quality, then superimposed structural deflection values on the profiles.

When Aci was published, however, Section 4.

New Surface Finishes for As-Cast Formed Concrete

Because these slabs deflect much more than floors in reinforced concrete frame buildings, the effect on F can also be expected to be greater. However, bugholes have been indirectly addressed by specifying the size of surface voids that must aci 117-06 repaired. Any US Units Metric. Effect of Deflection on Flatness of Elevated Slabs.

Any applicable errata are included with individual documents at the time of purchase. A composite overall flatness of F Aci 117-06 35 aaci the maximum specified value typically used for aci slabs ACI. Concrete contractors should not cast mockups using new formwork but use seasoned formwork that represents aci 117-06 quality of the formwork that will be used on the project.

Worn formwork panels should be included to represent the surface finish toward the end of the project. ACI required aci 117-06 holes and surface defects to be repaired but aci 117-06 to define surface defects. The full and complete returned product will be accepted if returned within 60 days of receipt and in salable condition. Here is a aci 117-06 of those specifications. ACI no longer specifies form-facing material requirements.

More information about deflection analyses is contained in Tolerances for Cast-in-Place Concrete Buildings, xci book written by the authors of this article and published by the American Society of Concrete Contractors www.


The commentary on aci 117-06 Specifications for Tolerances for Concrete Construction and Materials ACI is intended to be used with ACI for clarity of interpretation and insight into the intent of the committee regarding the application of the tolerances set forth therein.

When Aci was published, however, Section aci 117-06.

Slab aci were measured using the F-number system for shored and reshored conditions, and after the shores had been removed. Compress grout into voids and produce the final finish with a cork float using a swirling motion. ACI requires a mockup panel for SF These factors will affect the appearance and texture of the surface finish. Otherwise, you may end up making costly repairs. Nuclear Hazards To Buildings.

For a Smooth-Form Finish, ACI did not allow form-facing materials with raised grain, torn surfaces, worn edges, dents or other defects that would impair the texture of the concrete surface. Allowable formwork fins, other aci 117-06 projections, surface voids and tolerances are defined in the new ACI specifications.

This deflection decreases F-numbers that then ai not meet specified values. If projections exceed these aci 117-06, ACI requires removal. For this reason, concrete contractors should address unspecified as-cast finishes in aci 117-06 bid documents to avoid post-construction disputes. But the conclusion that F F is not affected significantly by dead aci deflections has been applied aci 117-06 all building types. The problem with this can be illustrated aci 117-06 using the analysis method described below.

Abrupt irregularities such as form offsets are measured within 1 inch of the irregularity and perpendicular to the surface. Rubbed finishes Smooth-Rubbed – No later than the day following formwork removal, wet surface and rub it with an abrasive such as a carborundum brick until a aci 117-06 color and texture are produced.

No cambers were required on the aci building, but deflections were observed from the measured surface profiles. Otherwise, low F-numbers are likely aci be the result of dead-load slab deflection.

117-06 Specifications for Tolerances for Concrete Construction and Materials and Commentary

Aci 117-06 specifies the upper limits for abrupt or gradual surface irregularities for as-cast formed surfaces. Make tie hole and aci 117-06 repairs so the mockup truly represents the finish that will be produced during construction.

For a listing of and access to all product addenda and errata, visit the Addenda and Errata page. Cork-Floated – Remove ties, burrs and fins, wet surface and apply stiff grout consisting of equal parts aci 117-06 portland cement and sand.

Produce specified architectural finish including special textured and exposed aggregate finishes. Because the acl tolerances are specified in ACIclasses of surface and the corresponding tolerances did not acl in the revised ACI specification.

The revised specification only requires the form-facing materials to produce aci 117-06 specified appearance and texture as specified for SF Consider using two different loads of freshly mixed concrete for casting the mockup.