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O-1 A P P E N D I X O AASHTO Test Method
O-2 Standard Method of Test for Adhesive Anchors in Concrete AASHTO Designation: T XXXX-XX Prior to possible addition of SvTTF: Refer to ACI 355.4-11 for testing of adhesive anchors in concrete with the following exceptions: ACI 355.4 §8.5.2.3 shall read as follows: Qualify anchors for one or both of the temperature categories given in Table 8.1. The minimum long-term temperature for which anchors shall be qualified is 110°F. The minimum short-term temperature for which anchors shall be qualified is 176°F. Install and test a minimum of five anchors at each temperature data point. For Temperature Category A, perform tests at standard temperature and at the short- and long-term temperatures. For Temperature Category B, perform tests on anchors at standard temperature, at the long-term and short-term test temperatures and a minimum of two intermediate temperatures between the long-term and short-term temperatures with a maximum increment of 35°F. If the zdifference between the long- and short-term test temperatures is less than 35°F, then testing at intermediate temperatures is not required. In ACI 355.4 §10.4.5.1 the definition of setup shall be: o setup = 1.0 if service condition tests are performed as unconfined tests, or determined from a series of five unconfined (per Table 3.2 test 11b) and five confined tests α (per table 3.2 test 1c) if tests are performed as confined tests. ACI 355.4 §7.9 shall read as follows: 7.9âSensitivity to mixing effort (Table 3.1, Test 2e; Table 3.2, Test 2e; and Table 3.3, Test 2e) R7.9 For adhesive anchor systems that do not use automatic metering and mixing systems, and for automatic mixing systems that do not provide information in the MPII regarding delays in the automatic mixing process it is necessary to check the sensitivity of the system to sub-optimal mixing of the adhesive components. 7.9.1 PurposeââThese reliability tests are used to assess the sensitivity of the adhesive material to mixing effort. These tests are required only for those anchor systems where the mixing of the adhesive material is substantially controlled by the installer or where MCII instructions are not provided to address delays in the automatic mixing process. Such cases include systems that require: a) Components to be mixed until a color change is effected throughout the adhesive material; b) The adhesive materials to be mixed with recommended equipment for a specific duration; c) That the adhesive materials be mixed with a repetitive mixing operation a specific number of times; and α
O-3 d) Continuous mixing in a nozzle but do not provide information in the MPII that addresses delays in the automatic mixing process that might occur during anchor installation (e.g., setting the injection system aside while an anchor is installed and then reinitiating adhesive injection some minutes later). 7.9.1.1 These tests are not required for capsule anchor systems or cartridge or bulk systems that employ automatic metering and mixing through a manifold and disposable mixing nozzle unless the MPII does not provide instructions regarding delays in the automatic mixing process. 7.9.2 General test conditionsââPerform confined tension tests in uncracked concrete. 7.9.3 Conduct tests as required to establish the required time for full mixing using standard mixing equipment. Reduced mixing effort shall be achieved by decreasing the mixing time required for full mixing by 25%. For automatic mixing systems that do not provide MPII instructions on delays in the automatic mixing process, discard adhesive from the nozzle then pause the injection of the adhesive for 3/4 of the recommended working time of the adhesive and then inject into the hole. Repeat this process for all replicates. Load the anchors to failure with continuous measurement of load and displacement. With addition of SvTTF: Conduct sustained load testing in accordance with AASHTO TP 84-10 with the following exceptions: Modify section 9.4.2 as follows: o 9.4.2 Test Series â Conduct a minimum of three series of sustained load (creep) tests at three stress levels (PL1, PL2, and PL3) based on the mean static load from the static load test. o 9.4.2.1 Percent load level range 1 (PL1) is suggested to be at 70 percent of mean static load. o 9.4.2.2 Percent load level range 2 (PL2) is suggested to be at 60 percent of mean static load. o 9.4.2.3 Percent load level range 3 (PL3) is suggested to be at 50 percent of mean static load. Modify section 10 as follows: o 10.6 Plot the normalized values from the sustained load (creep) tests on a Stress versus Time-to-Failure graph. o 10.7 Extend a trendline through the nine points plotted. If a long-term (creep) test has not failed within 1000 hours, the following options are permitted: o Continue the test until failure or o Terminate at a test duration specified by the manufacturer If the test is terminated, denote test as terminated and plot the sample on the SvTTF curve at the larger of the following: o Current test duration o Projected time to reach the average displacement of the short-term tests
