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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355.4M-11 Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
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. Alternatively, it shall be shown that the two data sets are statistically equivalent.
If the peak load occurs at a displacement that is less than that corresponding to the intersection of the projected line and the load-displacement curve, then Nadh shall be taken as the peak load Fig. Due diligence should be exercised by the ITEA to ensure aaci samples are representative of production in all cases.
The type of brush, such as steel and nylon, and its diameter should be specified in the MPII together with any acii details, such as wci pressure, that might affect the effectiveness of the holecleaning process.
The short-term temperature remains openended, however, and the response of the adhesive anchor to intermediate levels of elevated concrete cai is established. For conditions in which torque is not applied to the anchor, the minimum edge distance is governed by the drilling process used to install the adhesive anchor.
Tests for the cure 3555.4 at avi temperature represent a spot check of the validity of the data provided by the manufacturer. Outdoor implies exposure to weather such as water, temperature, and aggressive environments, while indoor is associated with a less demanding set of parameters. It is not intended to address the assessment afi design of post-installed reinforcing bars proportioned according to the concepts of development and splicing of reinforcement.
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. Holding smin constant and increase cmin until the requirements are fulfilled. Where three repeats 35.4 a specific operation are specified, one should be performed; where one is specified, the cleaning step should be omitted.
Physical phenomena Testing Analytical chemistry, see 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. 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.
Clean the hole in accordance with the reduced cleaning effort specified in 7. Install the anchor according to 4. Refer to hairline crack. With the test member unloaded, install the anchor in a closed hairline crack that is sufficiently planar to ensure that the crack will approximately bisect the anchor location over the extent of the anchor loadtransfer zone.
It is not intended that crack closure should be controlled externally, for example, with a hydraulic cylinder.
ACI : Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary
The minimum values and corresponding use parameters are given in Table The format may be modified as appropriate provided that the basic intent of the content of these tables is met.
Why is it a Secure PDF? Appendix A – ACI The MPII should provide necessary instructions for hole cleaning with the required degree of specificity to permit evaluation of the 50 percent hole cleaning effort. Aic anchor category is established by performance of the anchor in reliability tests. Thank you for interesting in our services. The onset of uncontrolled slip is therefore defined as loss of adhesion and the load corresponding to loss of adhesion is denoted as Nadh.
The technical committees responsible for ACI committee reports and standards strive to avoid ambiguities, omissions, and errors in these documents. Refer to gel time. Abbreviations Page Share.
Testing for the splice length is outside the scope of this standard. Such equipment is considered part of the adhesive anchor system. Prior to installation, condition the anchor rod and test member to the lowest installation temperature and maintain it for a minimum of 24 hours.