ACI 355.4-11 PDF
ACI M A U.S. Customary version of this document (ACI ) is available at Qualification of Post-Installed Adhesive Anchors. Click here to preview This standard prescribes testing programs and evaluation requirements forpost-installed adhesive anchors intended for use in concrete. ACI Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary. standard by American Concrete Institute, 08/01/.
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The use of alternate tests to address other materials is at aco discretion of the ITEA. Tests are also conducted on anchors installed in the same way and allowed to cure for the time specified in the MPII plus an additional 24 hours.
Cannon Conrad Paulson Neil M. For a listing of and access to all product errata, visit the Errata page. In prior codes, the minimum concrete compressive strength was 14 MPa. All anchors in a test series shall complete the simulated seismic-shear load history. Significant latitude is given to the engineer of record in determining the parameters of the proof load program, which will depend in large part on the type, size, and quantity of anchors being installed.
Testing and assessment criteria are provided for various conditions of use, including seismic loading; sustained loading; aggressive environments; reduced and elevated temperatures; and for determining whether anchors are acceptable for use in uncracked concrete only, or acceptable for qci both in cracked and uncracked concrete.
The applied sustained load shall not be less than 40 percent of Nsust,lt as determined in accordance with Eq. Mixture designs shall be in accordance with 4.
After the load has been applied, adjust the temperature of the test member until the temperature, as recorded by the embedded thermocouples, is stabilized at the target temperature. Steel elements for adhesive anchors may include threaded rods, deformed reinforcing bars, or internally threaded steel sleeves with external deformations.
For concrete breakout failure, this requirement is satisfied for anchors tested in tension if the reinforcement is located outside of a virtual cone projecting from the embedded end of the anchor to the concrete surface with an internal vertex angle of degrees. In particular, the sensitivity of adhesive anchors to variations in installation and service-condition parameters such as hole cleaning, installation orientation, and cracked concrete characteristics may vary widely from each system.
The use of a ramped loading function through the zero point of the cyclic load may be advantageous for operation of the testing apparatus.
Test is required only for anchors having cross-sectional area within five anchor diameters of the shear failure plane that is less than adi of threaded bolt having same nominal diameter as anchor. 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.
Other methods shall be permitted subject to the requirements of ACI Round-robin tests are performed in regional concretes to establish and compare a nominal bond strength 35.4-11 generally expected anchor performance against the tested anchor bond strength.
The mean residual capacity of the anchors in the test series shall be at least percent of Veqas given by Eq. Their use, therefore, is generally limited to discrete embedment depths for each anchor diameter corresponding to complete filling of the annular gap with cured adhesive.
In addition, Sci chapters provide opportunities for interaction of professionals and practitioners at a local level.
ACI : Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary
It does not capture all possible environmental exposures deleterious to anchor performance. Due to the likelihood that products will be installed in concrete exposed to water such as concrete exposed to weatherthese tests are mandatory. The mean residual capacity 3355.4-11 the anchors in the test series in the tension test shall be at least percent of the reduced peak load Veq,reduced.
The suitability of a specific adhesive for anchoring applications may also be dictated by health and safety requirements as contained, for example, in the product Material Safety Data Sheet MSDS.
Short-term elevated concrete temperatures occur over brief intervals, for example, as a result of diurnal cycling. The residual crack width 9 associated with a closed crack may be influenced by the presence of anchors installed in the crack path and by the crack width cycling history of the test member.
It may also be desirable to reconsider those tests where only small, medium, and large diameters are tested when the upper diameter is much larger than 38 mm. Parallel crack openings are used because they represent the most critical condition for the anchor response to loading.
355.4M-11 Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
adi Pacific Time Zone; Region 2: If the MPII specifies flushing of the hole with water prior to anchor installation, it shall be permitted to flush the hole with potable water prior to installing the anchors. The characteristic value or 5 percent fractile has been selected for anchorage design.
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In all cases, bond failure is required refer to 4.
The design method deemed to satisfy the anchor design requirements of ACI M, Appendix D, is based on 355.-411 analysis of an anchor database with a maximum diameter of The MPII shall include information on storage conditions, shelf life, and all restrictions on installation conditions The special inspector shall verify the initial installations of each type and size of adhesive anchor by construction personnel on site in accordance with As both of these tests involve exposure to water, evaluation of the adhesive for susceptibility to hydrolyzation is included as well.
For the determination of the anchor category, refer to Any applicable errata are included with individual documents at the time of purchase. The concrete mixture shall not include cement replacements such as slag cement, fly ash, and silica fume or limestone powder.
Reference to this document shall ack be made in contract documents. Adhesive anchors in aggressive environments not specifically considered in this standard. Discard the top and bottom slices. Care should be taken in the characterization of failure modes based on test observations. For overhead installations, the adequacy of measures, as required, to prevent sag of the anchor element prior to adhesive cure Fig.