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. ).
|Published (Last):||11 May 2007|
|PDF File Size:||9.19 Mb|
|ePub File Size:||13.30 Mb|
|Price:||Free* [*Free Regsitration Required]|
The procedure used shall enable the evaluation of the installation procedure as described in The anchors are allowed to cure for the minimum curing time. Confined round-robin tests may be omitted, however, if Eq.
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 acii of the test member falls below the temperature listed in Table 8.
A thermocouple inserted into the test member may be used to confirm test member temperatures during the test.
M Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
Where this is not possible, rules are provided for consistent determination of Nadh. If the results of the reference and reliability tests cannot be shown to be statistically equivalent to the results of the original testing, retest and evaluate the modified adhesive anchor system in accordance with ACI Unlike expansion and undercut anchors, adhesive anchors do not develop wedging forces in the crack during the axi of the crack movement test.
An austenitic stainless steel anchor element of sufficient resistance should be used in the sulfur dioxide tests to avoid steel failure. Confined tests measure the bond strength of the anchorage as opposed to the concrete capacity associated with concrete failure modes such as concrete cone breakout. 355.44 are provided for establishing the characteristic bond strength,reductions for adverse conditions, and the anchor category and associatedjob-site quality control requirements. Holding cai constant and increase smin until the requirements are fulfilled.
Failure of an anchor to 3555.4 the required shear resistance in any cycle prior to completing the loading history given Table 8. In the context of anchor installation, continuous special inspection is generally understood to mean that the inspector is present for each anchor installation.
For optimization of the predicted strength of anchors in cracked concrete conditions, the entire test program outlined in Table 3.
ACI : Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary
Consulting members Edwin G. For the purpose of axi 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.
There can be more than one combination of these three minimum values. Capsule anchors that are set with hammering action only, hammer-set may have other parameters that are critical in this regard. For tests in sulfur dioxide, fabricate the anchor element from austenitic stainless steel. Reliability tests are performed to establish that the anchor cai capable of safe, effective behavior under normal and adverse installation conditions. Qualification for seismic loading shall only be considered in the context of a cracked concrete acci program as given in Table 3.
Because these documents are revised frequently, the reader is advised to contact the proper sponsoring group if it is desired to refer to the latest version. Drill the hole downward in the submerged concrete, clean the hole in accordance with the reduced cleaning effort specified in 7. Testing Assessment Test no. For the purposes of this section, an operation shall be considered to be an action that is repeated not more than three times in succession.
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.
Verification in water-saturated concrete is mandatory. Based on wci from you, our users, we’ve made some improvements that make it easier than ever to read thousands of publications on our 3554. 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 adjustments on bond stress for temperature, environmental exposure, and sustained tension loading may be expressed by listing the adjusted bond stress or including a properly designated factor.
Otherwise, perform a load test in accordance with 8. It must be included in packaging for the adhesive anchor system and cannot be supplied in the form of supplementary documentation 3555.4 verbal instruction. It is assumed that all aspects of acu installation zci described in the MPII for all installation conditions, including installation direction and concrete temperature.
355.4M-11 Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
It shall be permitted to test the components separately or their mixture, as appropriate. Official interpretation of this ACI document shall be based only on the U. Search Result Product Details. Select smin, cmin, and hmin depending on anchor characteristics. Two levels of quality control are provided. The committees, as well as ACI as a whole, operate under a consensus format, which assures all participants the right to have their views considered.
The MPII should clearly state the storage requirements associated with predicted shelf life for the adhesive. Test the nominal M12 diameter or the smallest nominal diameter if it is larger than M Parallel crack openings are used because they represent the most critical condition for the anchor response to loading. Instructions for use as provided by the manufacturer, should include specific instructions for all conditions of installation to be included in the evaluation, including installation in water-saturated concrete, water-filled holes, overhead installation, and other adverse installation conditions.
Significant latitude is given to the engineer of record in determining the parameters of the proof load program, which will depend in large part on the type, size, and quantity of anchors being installed. Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book.
The hole in the confining plate shall be 1. Service-condition tests to establish anchor performance under expected service conditions Chapter 8 R3.
Adhesive anchors to resist fatigue or shock loading. There is no limit to the number of 35.4 a document may be viewed on your computer. Central Time Zone; and Region 4: For anchor elements that do not require the application of torque, such as deformed reinforcing bar dowels, these tests may be omitted.