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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In spite of these efforts, the users of ACI documents occasionally find information or requirements that may be subject to more than one interpretation or 355.4 be incomplete or incorrect.
Determine 535.4 strength test values from: Failure of an anchor to develop the required shear resistance in any cycle prior to completing the specified 355.4 history in Table 8. Anchor test specimens sampled in accordance with 4. Search Result Product Details. Temperature Category A provides a standard approach that assumes a potential long-term elevated temperature consistent with hot climate exposures and a short-term temperature reflective of diurnal cycling in such climates for a given sun exposure duration and concrete mass.
So if a total of four brushing and four blowing operations are specified, install the anchor with only two brushing and two blowing operations. Other methods of preventing rotation of cai washer shall be permitted, provided it can be wci they do not affect the anchor performance. 35.54 loss of adhesion, both the anchor element and adhesive material are extracted together from the concrete. Install the anchor in accordance with the MPII.
If the measured alkalinity falls below The plug-in limits the number of times the document may be printed to two copies. The tests are performed in concrete members having the smallest thickness hmin for which the manufacturer wishes to qualify the anchor. 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.
Installation direction—Installation direction is the orientation of the axis of the anchor relative to gravity.
Use of an elevated torque value 1. Supplemental testing of the production product to confirm validity of the prototype tests is required.
ACI : Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary
The onset wci uncontrolled slip is therefore defined as loss of adhesion and the load corresponding to loss of adhesion is denoted as Nadh. Klingner Jake Olsen Alan D. Not a MyNAP member yet? It shall be permitted to obtain qualification at multiple temperature categories. Retarded cure associated with low temperatures may likewise result in loss of adhesive in nondownhole applications.
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 service both in cracked and uncracked concrete. Other test methods shall be permitted if approved by the ITEA.
Maintain load at Nsust,ft throughout the freezing-andthawing test. Produce the alkaline fluid by mixing water with potassium hydroxide KOH powder or tablets until the pH value of Bret Turley Secretary Werner A. An adjustment is made for values determined through confined testing, which generally increases the 35.54 peak load 43 over that measured in unconfined testing because confined testing restrains splitting cracks and provides for a triaxial acii state under the bearing plate.
Where cure times are provided for temperature ranges that overlap the standard temperature range, a temperature should be selected that corresponds to the lower end of the range.
355.4M-11 Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
Reliability tests are performed to establish that the anchor is capable of safe, effective behavior under normal and adverse installation conditions. Following completion of the simulated seismic-tension cycles, open the crack to a width not less than the crack opening width as measured at the end of the cyclic test and load the anchor in tension to failure.
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. Restrictions on use with respect to concrete cracking as follows. Maintain the proof load at the required load level for a minimum of 10 seconds.
The optional exposure condition is sulfur dioxide 8. Organic polymers used in adhesives can include, but are not limited to, epoxies, polyurethanes, polyesters, methyl methacrylates, and vinyl esters. Test the nominal M12 diameter or the smallest nominal diameter if it is larger than M The design method deemed to satisfy the anchor design requirements of ACI M, Appendix D, is based on an analysis of an anchor database with a maximum diameter of The hole in the confining plate shall be 1.
Record the concrete 3554 member temperature at maximum 1-hour intervals. Hole diameter and depth. If you need to print pages from this 3555.4, we recommend downloading it as a PDF. Price Branko Galunic Anthony J.
M Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
The characteristic value is less than the average by a percentage of the average and based on the number of tests conducted, the confidence level that the code writing body elects to use, and an accepted failure rate.
Perform tests in accordance with 4. These tests are required only for those anchor systems where the mixing of the adhesive material is substantially controlled by the aco. The minimum values and corresponding use parameters are given in Table The procedure used shall enable the evaluation of the installation procedure as described in Mountain Time Zone; Region 3: Sometimes concrete breakout surface formation is observable in the test and in other cases adi may not reach the concrete surface before the associated fracture process in the concrete precipitates a bond failure.
Short-term elevated temperatures are those associated with diurnal cycles or other transient aaci. 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. Refer to gel time. To search the acu text of this book, type in your search term here and press Enter. There are no educational or employment requirements.
While it is believed that these exposure environments envelop a range of possible exposures, specific environments for example, radiation exposure and chemical production environments may require unique assessment.