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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This standard also applies to anchors with an anchor embedment depth hef not less than four diameters 4daor 41 mm, and an embedment depth not exceeding 20da. While the provisions of Chapter 355.44-11 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.
It does not contain specific instructions for many of the tests described in this sci. The determination of the coefficients a and b is sensitive to the number of data points evaluated and should be approached with care.
Verification that the test procedure used for a specific test will produce the appropriate crack geometry shall be performed at the beginning of the test series. The official version of this ACI document uses inch-pound units.
The double-sided abrasive paper shall have sufficient roughness to prevent rotation of the washer relative to the test fixture during the application of torque. For anchors evaluated in accordance with Table 3.
The format may be modified as appropriate provided that the basic intent of the content of these tables is met. The fixture shall contain all elements shown. Extend tension reinforcing as required in 4. Where three repeats of a specific operation are specified, one should be performed; where one is specified, the cleaning step should be omitted.
Failure of an anchor to develop the required shear resistance in any cycle prior to completing the specified loading history in Table 8. These tests permit the selection of product-specific values for cmin and smin that, in conjunction with some value of hmin ac, will allow anchor installation without damage in the form of splitting cracks to the concrete.
ACI : Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary
Record the maximum tension load, that is, residual tension capacity; the corresponding displacement; and plot the load-displacement response. Following application of load to the anchor sufficient to remove any slack in the loading 3554-11, begin recording the anchor displacement, and increase the tension load on the anchor to Nw as given by Eq. Report any use 3555.4-11.
The format, text, pictograms, photos, or other graphic devices used to convey the installation procedures should be legible, self-explanatory, and understandable for persons having a secondary school or higher education level. Where bond values in excess of those specified in ACI M, Appendix D, for adhesive anchors in lightweight concrete are required, these must be based on testing in lightweight concrete.
355.4M-11 Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
Otherwise, perform a load test in accordance with 8. 355.4-11 anchors in cylindrical concrete test members having a minimum diameter of mm. The tests are performed in concrete members having the smallest thickness 3554-11 for which the manufacturer wishes to qualify the anchor.
Care should be taken in the characterization of failure modes based on test observations. Seal the interface between the blocks. It is therefore critical that the hole-cleaning procedures used in the test program correspond to those given in the MPII. The plug-in limits the number of times the document may be printed to two copies.
Mixture designs shall be in accordance with 4. Refer to five percent fractile. Reference tests to obtain baseline values for the evaluation of reliability and service-condition test results Chapter 6 3. The wci width is assumed to be roughly percent of the maximum crack width associated with elastic conditions, with the maximum level of axi loading approximately twice the service load level under nonseismic conditions. Seal all other exposed surfaces to prevent evaporation of water.
We need your help! There is no limit to the number of times a document may be viewed on your computer. These conditions are best confirmed using a boroscope. Perform tension tests to failure with continuous measurement of load and displacement.
M Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
They are not pass-fail tests, but rather provide the necessary input for determining the characteristic maximum bond stress for the adhesive anchor system. Adhesive installation in accordance with the MPII.
Capsule diameter corresponds approximately to nominal anchor diameter. Temperature extremes can also affect the installation process, whereby hotter ambient temperatures will simultaneously decrease the adhesive viscosity and accelerate the curing process and colder temperatures will generally increase viscosity and retard curing.
Adhesive anchors in aggressive environments not specifically considered in this standard. This temperature is relevant for testing to establish response to sustained load.
If the adhesive material is changed by the manufacturer, that change may or may not significantly affect the published performance of the anchor system. Ideally, the crack runs vertically down the centerline axis of the anchor over its entire length.