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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Where such restraint is used for example, steel cylinderdimensions of the specimen may be reduced. So if a total of four brushing and four blowing operations are specified, install the anchor with only two brushing and two blowing operations. The distance to the edge of the bearing plate from the centerline of the corresponding anchor shall be three times the diameter da of the anchor being tested. For overhead and horizontal orientations, test the largest diameter for which recognition is sought.
Examples include bonded steel plates or external carbon fiber reinforcement. Cast the concrete test members in lengths of steel or plastic pipe having a wall thickness as required to prevent slice splitting during punch testing.
Where a trend can be established between bond stress and diameter, a best-fit approximation to the recorded values should be established and used to establish unique bond stresses for each diameter as appropriate.
The minimum values and corresponding use parameters are given in Table Loading—Default loading conditions are static loading including sustained loads. For anchor systems evaluated using the reduced test program of Table 3. We are a non-profit group that run this website to share documents. For the determination of the anchor category, refer to In all cases, bond failure is required refer to 4.
Errata are not included for collections or sets of documents such as the ACI Collection. A basic differentiation is made between outdoor and indoor use.
Gross installation errors are characterized by significant deviations from the MPII or design specifications and include, but are not limited to: Anchor element type—Anchor element types used in the anchorage system include different steel material types such as carbon and stainless steels, different tensile strengths of the steel, and different anchor elements such as threaded rods, reinforcing bars, and internally threaded inserts 3.
While the provisions of Chapter 12 of ACI M may be used to establish embedment lengths for post-installed reinforcing bars in such cases, the ability of an adhesive anchor system to transfer loads to adjacent embedded bars, particularly where longer splice lengths are required, should be verified by appropriate testing.
Reproduction and Redistribution Restricted: This crack width is consistent with the expected response of reinforced concrete structures under sustained load.
The anchor shall not turn in the anchor hole prior to reaching a torque resistance of 1. 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.
Load the adi group in tension to failure as an unconfined test. Anchor element acci, material, diameter, and length. Perform tension tests to failure with continuous measurement of load and displacement.
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 Veq,reduced.
ACI : Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary
It must be included in packaging for the adhesive anchor system and cannot be supplied in the form of supplementary documentation or verbal instruction. In the context of anchor installation, continuous special inspection is generally understood to mean that the inspector is present for each anchor installation.
Meinheit Chair Tarek S. The optional exposure condition is sulfur dioxide 8. Where concrete temperatures may remain elevated over weeks or months, they should be considered longterm elevated temperatures.
Where unconfined tension tests are used as reference tests, they 3555.4-11 be compared to unconfined reliability or service-condition tests.
For each test, simultaneously record the torque at first formation of a hairline crack at one or both anchors and the maximum torque that can be applied to the anchors. Due to the likelihood that products will be installed in concrete exposed to water such as concrete exposed to weatherthese tests are mandatory.
M Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
Qualification for seismic loading shall only be considered in the context of a cracked concrete test program as given in Table 3. Failure of an anchor to develop the required shear resistance in any cycle prior to completing the loading history given Table 8. The determination of the coefficients a and b is sensitive to the number of data points evaluated and should be approached with care. Support the test member to permit uniform tension strain distribution over the length of the test member.
Alternatively, it shall be shown that the two data sets are statistically equivalent. A limitation on the minimum embedment length of adhesive anchors is necessary to ensure conformance with the design method deemed to satisfy the anchor design requirements of ACI M, Appendix D.
This standard does not address issues such as adhesive toxicity, safe disposal of adhesive compounds, or conformance with sustainable building requirements as applicable. Drilling method—The default drilling method uses a rotary hammer drill with carbide bit. Due to the variety of possible loading conditions associated with fatigue and shock loading, this standard does not include tests for these loading variants. These tests are optional; however, failure to assess this condition will result in restrictions on the use of the adhesive anchor system.
Place the two anchors in a line parallel to the edge of a concrete test element at a distance of at least 3hef from other groups. Includes proof load program. ACI committee documents ac intended for the use of individuals who are competent to evaluate the significance and limitations of its content and recommendations and who will accept responsibility for the application of the material it contains.
The ratio of tension reinforcement for top and bottom layers to the area of the crack plane shall be approximately 1 percent.
Other formats are permissible. 3355.4-11 length of time the pH was less than The anchors are allowed to cure for the minimum curing time. 355.4-111 and test a minimum of five anchors at each temperature data point. Although the core drill is shown, other 21 drilling methods may be used as appropriate.