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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Outdoor implies exposure to weather such as water, temperature, and aggressive environments, while indoor is associated with a less demanding set of parameters. The anchor shall not turn in the anchor hole prior to xci a torque resistance of 1. Plot the loaddisplacement history in the form of hysteresis loops.
Discard results from slices that split during the punch test. An austenitic stainless steel anchor element of sufficient resistance should be used in the sulfur dioxide tests to avoid steel failure.
M Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
Physical phenomena Testing Analytical chemistry, see 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. They are not intended to address gross installation errors. All rights reserved including rights of reproduction and use in any form or by any means, including the making of copies by any photo process, or by electronic or mechanical device, 3555.4, written, or oral, or recording for sound or visual reproduction or for use in any knowledge or retrieval system or device, unless permission in writing is obtained from the copyright proprietors.
For a discussion of issues associated with the qualification and design of systems for post-installed reinforcing bars, refer to Afi et al. For adhesive anchor systems not designed for other than down-hole installation, these tests may be omitted.
A distinction is made between continuous special inspection and periodic special inspection. If no torque is specified by the MPII, finger-tighten the anchor prior to testing.
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Embed anchors in cylindrical concrete test members having a minimum diameter of mm. Care must be taken in preparation of the slices and punch testing to ensure reliable results. System Requirements and FileOpen Plug-in download. Criteria are provided for establishing the characteristic bond strength, reductions for adverse conditions, and the anchor category and associated job-site quality control requirements.
The rate of temperature rise is intended to be consistent with sun exposure. Verification in water-saturated concrete is mandatory. Aggregates shall be in accordance with 4. The load Nadh shall be taken from the point of intersection between the projected line and the measured loaddisplacement curve Fig.
Acu exposure—The default exposure condition is high alkalinity in a wet environment.
355.4M-11 Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
ACI committee documents are 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. Refer to five percent fractile. Once a PDF file has been bound to a computer, it can be opened only from that computer.
As such, a 5 percent tolerance on the ratio of the round-robin bond stress to the reference bond stress is included in the assessment. If the comparison does not indicate statistical equivalence in test results between carbide rotary-hammer drilling and the alternative drilling method, then the alternative drilling method must be qualified using the test requirements of 3.
Options include installation in water-filled holes and in submerged concrete 7. The mean failure load shall equal or exceed 90 percent of the expected load calculated on the basis of the service-condition tests in uncracked concrete, taking into account the effects of reduced spacing and edge distances. Capsule diameter corresponds approximately to nominal anchor diameter. Remove each test member from the heating chamber and conduct a confined tension test to failure with continuous measurement of load and displacement before the temperature of the test member falls below the temperature listed in Table 8.
It shall be permitted to obtain qualification at multiple temperature categories.
Options include installation at lower concrete temperatures 8. Because of the possibility for run-out of adhesive during overhead installations, particular care should be exercised to prevent skin or eye exposure, and all precautions indicated by the MSDS for the product should be exercised.
Dimensions of the test member shall be chosen to avoid splitting the test member during the test conduct. Included are assessments of the adhesive anchor system for bond strength, reliability, service conditions, and quality control. Klingner Jake Olsen Alan D.
Bolts, nuts, and washers not supplied with the anchors shall conform to the specifications given by the manufacturer, which shall be included in the test report. This edge distance represents the critical edge distance at which there is no edge influence on the tensile capacity of the anchor as governed by concrete failure. The method described in 4.
Reduced mixing effort shall be achieved by decreasing the mixing time required for full mixing by 25 percent. Cure cylinders to the same environmental conditions as the test member. Based on feedback from you, our users, we’ve made some improvements that make it easier than ever to read thousands of publications on our website.
To assess the performance of an anchor for use in concrete outside of the scope of ACI The concrete mixture shall not include cement replacements such as slag cement, fly ash, and silica fume or limestone powder. Limitations on installation conditions in accordance with Table The drilling action during setting of spin-set capsule anchors is critical to the correct mixing and curing of adhesive.
The prototypes, however, must be produced using the production methods foreseen for the full-scale production and must be accompanied by a complete MPII.
Immediately prior to installing the anchors, remove freestanding water from the hole with a vacuum. Verify the durability of the adhesive material with slice tests. Tests for the cure time at standard temperature represent a spot check of the validity of the data provided by the manufacturer.
Stop the test when splitting or 3355.4 failure prevents the torque from being increased further. For the purpose of these tests, support the test member, that is, slab and beam, with a shear span length, which is the distance from anchor to support, not less than 1.
It is anticipated that the MPII will contain specific procedures, such as flushing the hole with water, for 355.4 holes drilled into saturated concrete 355.4 where the drilled hole has been subjected to water prior to the anchor installation for example, from rain.
Bit wear should, nevertheless, be monitored during the test program. The formation of limited-depth conical breakout surfaces shall also be considered as pullout failures.
Typical sources of elevated concrete temperature are anticipated, with the exception of heat of hydration in earlyage concrete, extreme elevated temperature for example, boiler roomsand exposure to nuclear radiation in containment structure.