ACI 355.4 PDF
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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The user must determine the applicability of all regulatory limitations before applying the document and must comply with all applicable laws and regulations, including but not limited to, United States Occupational Safety and Health Administration OSHA health and safety standards. Customary version of this document ACI They are not intended to address gross installation errors. The test for exposure to sulfur dioxide 8.
355.4M-11 Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
The crack width is assumed to be roughly percent of the maximum crack width associated with elastic conditions, with the maximum level of cyclic loading approximately twice the service load level under nonseismic conditions. 355. need your help! Raise the temperature of the test chamber to the maximum long-term test temperature either Category A or B according to Table 8. In addition, the value ac 1. If thermocouples are not used in accordance with 7.
For anchors that do not meet the threshold values for the lowest anchor category, a further reduction in the limiting characteristic bond stress is taken.
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Please copy and paste this embed script to where you want to embed Embed Script. Concrete condition—Options include uncracked concrete or uncracked and cracked concrete.
Seal all other exposed surfaces to prevent evaporation of water. 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. Report these values in Table The rate of temperature rise is intended to be consistent with sun exposure.
Testing and assessment criteria are providedfor various conditions of use, including seismic loading; sustained loading;aggressive environments; reduced and elevated temperatures; 3554. fordetermining whether anchors are acceptable for use in uncracked concreteonly, or acceptable for service both in cracked and uncracked concrete.
Round-robin tests are required to minimize the potential impact of locally favorable or unfavorable aggregate types on the results 535.4 qualification testing. Determine mean strength test values from: Record the maximum shear load or residual shear capacity and the corresponding displacement, and plot the loaddisplacement response.
Reference to this document shall not be made in contract documents.
Round-robin tests followed extensive, but inconclusive, investigations to determine the precise nature of concrete composition influence on adhesive anchor performance. Perform a minimum of five confined and five unconfined tension tests to failure on anchors in concrete produced in accordance with Mixture Design A and a minimum of five confined and five unconfined tension tests to failure in concrete produced in accordance with Mixture Design B.
Hole cleaning in accordance with the MPII.
ACI : Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary
Classification predicated on exposure to alkaline environment but no exposure to sulfuric atmosphere. For conditions in which torque is not applied to the anchor, the minimum edge distance is governed by the drilling process used to qci the adhesive anchor. Drilling ac diamond core bits, dry or wet, produces a smoother hole wall with a layer of drilling slurry or dust that can impair bond development.
Members are encouraged to participate in committee activities that relate to their specific areas of interest. 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.
Supplemental testing of the production product to confirm validity of the prototype tests is required. Prepare the hole with reduced cleaning effort in accordance with 7.
The concrete mixture shall not include cement replacements xci as slag cement, fly ash, and silica fume or limestone powder. In general, loss of adhesion is characterized by a significant change in stiffness as reflected in an abrupt change in the slope of load-displacement curve Fig.
M Qualification of Post-Installed Adhesive Anchors in Concrete and Commentary (Metric)
While standards have been issued for the testing and assessment of anchors for exposure to fire, little guidance exists for the use afi the resulting resistance values in design.
Other methods of preventing rotation of the washer shall be permitted, provided it can be shown they do not affect the anchor performance. One example is underrepresenting the maximum bond strength of the adhesive anchor system. Acceptable displacements at proof load. Other table zci are permissible.
Aggregates shall be in accordance with 4. For concrete breakout failure, this requirement is satisfied for anchors tested in tension if the reinforcement is located outside of 35.4 virtual cone projecting from the embedded end of the anchor to the concrete surface with an internal vertex angle of degrees. The load shall be sci using an unconfined test setup as shown in 4. Perform this evaluation separately for the results for unconfined and confined tests.
The special inspector shall verify the initial installations of each type and size of adhesive anchor by construction personnel on site in accordance with Refer to Fuchs et al.