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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The thermocouples shall be either cast in the concrete or positioned in holes drilled in the cured test member. The two exposure conditions—alkalinity and sulfur—are considered two of the most common and aggressive and, therefore, used as the baseline classification of anchor use.
Acceptable methods and minimum number and duration of operations required for removal of dust or drilling flour from the hole wall 4. Test and 3554-11 criteria are provided for various conditions, including loads seismic and sustainedenvironmental with regard to humidity and temperature, and determination if anchors are acceptable for use in cracked or uncracked concrete.
If the test member 355.4-1 cast vertically, limit the maximum height of a concrete lift to 1. Apply external loading to both ends of the reinforcement to facilitate development of uniform strain over the length of the reinforcing. For a listing of and access to all product errata, visit the Errata page.
Report these values in Table To reduce the potential for uncontrolled slip during load reversal, the alternating shear loading shall be permitted to be approximated by the application of two half-sinusoidal load cycles at the desired frequency connected by a reducedspeed ramped load, as shown in Fig. Otherwise, perform a load test in accordance with 8. Discard results from slices that split during the punch test.
Adhesive 3554.-11 systems that do not exhibit characteristic bond strengths equal to or exceeding the minimum permissible bond strength in accordance with The characteristic value or 5 percent fractile has been selected for anchorage design. Use of an elevated torque value 1.
M Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
It shall be permitted, however, to transport specimens prepared by the regional laboratories in the different geographic regions to the primary testing laboratory for testing.
The capsule is fragmented and becomes part of the hardened resin matrix. So if a total of four brushing and four blowing operations are specified, install the anchor with only two brushing and two blowing operations. 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.
For example, if the MPII calls for blowing out the hole twice with compressed air followed by four insertions of a brush and two additional applications of compressed air, 50 percent effort would be assessed as one application of compressed air followed by two insertions of the brush and one application of compressed air.
Use a sampling frequency appropriate for the load or strain rate employed for the test. Conduct tests on all-thread anchors that have been installed in accordance with the MPII. As such, changes in the lower crack width with increasing crack cycling are likely to be due to other causes, for example, changes in the bond relationship of the embedded reinforcement in the test specimen.
This standard includes tests to assess the sensitivity of adhesive anchor systems to a limited range of aggressive environments, including moisture, highly alkaline fluids, and sulfur dioxide.
355.4M-11 Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
Stack concrete blocks A and B, as shown in Fig. Testing in concrete with a compressive strength of 14 MPa may be necessary to validate the use of anchors in existing structures. This standard does not address issues such as adhesive toxicity, safe disposal of adhesive compounds, or conformance with sustainable building requirements as applicable.
355.4-11 of the number, order, and duration of cleaning operations and description of equipment used is required. It is therefore permissible to determine a range of limiting characteristic bond stress values associated with specific conditions.
Individuals interested in the activities of ACI are acj to become a member. To establish design bond strengths, two classes of elevated concrete temperature are identified: Company organization, management and quality.
Test anchor elements having a cross-sectional area that is less than a threaded bolt of the same nominal diameter as the anchor within five anchor diameters of the shear failure plane.
Other methods of preventing rotation of the washer shall be permitted, provided it can be shown they do not affect the anchor performance. Apply a tension preload not exceeding 5 percent of 31 Nsust,lt or N to the anchor prior to zeroing displacement readings. If the MPII specifies flushing of the hole with water prior to anchor installation, it shall be permitted to flush the hole with potable water prior to installing the anchors.
Such cases include systems that require components to be mixed until a color change is effected throughout the adhesive material, the adhesive materials to be mixed with recommended equipment for a specific duration, and the adhesive materials be mixed with a repetitive mixing operation a specific number of times.
Classification predicated on exposure to alkaline environment but no exposure to sulfuric atmosphere.
ACI : Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary
The friction factor shall be taken as a lower-bound value. To assess acci performance of an anchor for use in concrete outside of the scope of ACI Greater values for spacing of reinforcement are allowed as in the case of narrow concrete components, for example: The trend line shall be determined by calculating a least-squares fit through the data points using Eq.
Anchor performance data in accordance with Embedment depth and anchor diameter—The anchor diameters and associated embedment depth range 3355.4-11 specified by the manufacturer within the ranges permitted by this standard refer to Chapter 1.
Refer to characteristic value. In prior codes, the minimum concrete compressive strength was 14 MPa.