ACI 355.4 PDF
While ACI gives no limitations on maximum anchor diameter, for anchors beyond this dimension, the testing authority should decide if the tests described. Click here to preview This standard prescribes testing programs and evaluation requirements forpost-installed adhesive anchors intended for use in concrete. Concrete in Accordance With ACI and the IBC . Qualification of Post-Installed Adhesive Anchors in Concrete (ACI. ).
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If the results of the reference and reliability ac cannot be shown to be statistically equivalent to the results of the original testing, retest and evaluate the modified adhesive anchor system in accordance with ACI For tests in sulfur dioxide, fabricate the anchor element from austenitic stainless steel. Participation by governmental aaci in the work of the American Concrete Institute and in the development of Institute standards does not constitute governmental endorsement of ACI or the standards that it develops.
Other formats are permissible. The mean residual capacity of the anchors in the test series in the tension test shall be at least percent of the reduced peak load Neq,reduced. Perform at least 80 cycles.
Install the anchor according to 4. Drill the hole downward in the submerged concrete, clean the hole in accordance with the reduced cleaning effort specified in 7.
As such, they are suitable to assess the effects of temperature variation, suboptimal hole cleaning, mixing effort, sustained load, installation direction, temperature variations, and environmental exposure on anchor performance. Reproduction and Redistribution Restricted: Testing Assessment Test no. Products may be tested and assessed for either or both categories under this standard. Cannon Conrad Paulson Neil M.
After production has begun, perform identification and reference tests to verify the constituent materials have not changed and performance of the production anchors is statistically equivalent to the anchors originally evaluated. Perform a minimum of five confined and five unconfined tension tests to failure on anchors in concrete produced in accordance with Mixture Design A and a minimum of five confined and five unconfined tension tests to failure in concrete produced in accordance with Mixture Design B.
Abbreviations Page Share. Temperature Category B establishes the same long-term temperature as temperature Category A.
The test consists of three parts: The long-term elevated temperature corresponds to the temperature category as per Table 8. The results of tests on cylinders and cores shall not be combined for the establishment of the mean compressive strength at a given concrete age. Prior to installation, condition the acii rod and test member to the target temperature and avi that temperature for a minimum of 24 hours.
Select smin, cmin, and hmin depending on anchor characteristics. Concrete temperature as an installation parameter is addressed separately in 8. As such, a 5 percent tolerance on the ratio of the round-robin bond stress to the reference bond stress is included in the assessment. Maintain the proof load at the required load level for a minimum of 10 seconds.
Dimensions of the test member shall be chosen to avoid splitting the test member during the test conduct. Remove each test member from the heating chamber and acl a confined tension test to failure with continuous measurement of load and ac before the temperature of the test member falls below the temperature listed in Table 8. Aic predicated on exposure to alkaline environment but no exposure to sulfuric atmosphere.
Additionally, shallow anchors that exhibit pullout failure in unconfined tension tests may exhibit shear strengths away from edges that are below those predicted by ACI M, Appendix D.
Organic polymers used in adhesives can include, but are not limited to, epoxies, polyurethanes, polyesters, methyl methacrylates, and vinyl esters. The use of bulk adhesive components metered, mixed, and delivered manually that is, poured is not addressed by this standard. For anchor elements that do not require the application of torque, such as deformed reinforcing 535.4 dowels, these tests may be omitted. Use of an elevated torque value 1. If this requirement is not met, reduce the installation torque Tinst as required to fulfill the requirement.
Tests for the cure time at standard temperature represent a spot check of the validity of the data provided by the manufacturer. The format may be modified as appropriate provided that the basic intent of the content of these acii is met.
M Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
As such, changes in the lower crack width with increasing crack cycling are likely to be due to other causes, for example, changes in the bond relationship of the embedded reinforcement in the test specimen. Proof load levels shall not exceed the lesser of 50 percent of the expected peak load based on adhesive bond strength or 80 percent of the anchor yield strength.
Embed thermocouples a maximum of mm from the surface of the concrete into which the anchors are to be installed.
For deeper embedments, use of multiple capsules may be specified by the manufacturer. Subject the anchors to the sinusoidal tension loads specified in Table 8. Other cleaning methods are permitted; however, the MPII for the product shall contain sufficient specificity to permit the acii of a numeric 50 percent acii of hole cleaning effort. Care should be taken in the characterization of failure modes based on test observations.
The official version of this ACI document uses inch-pound units. Seal all other exposed surfaces to prevent evaporation of water.
355.4M-11 Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
Hole drilling method in accordance with the MPII. All anchors in a test series shall complete the simulated seismic-tension load history. Qualification of adhesive anchors exclusively for short-term loads is not permitted by this standard. Limitations on use based on environmental conditions in accordance with Table