Product Technical Guides : US-EN Post-Installed Rebar Guide - Page 23

Post-Installed Reinforcing Bar Guide
5.0 DEVELOPMENT OF DESIGN DATA
Figure 41 — AC308 Table 3.8 : Test Program for Evaluating Deformed Reinforcing Bars for Use in Post-installed Reinforcing Bar Connections Testing Bar size Assessment
Test
Load &
no .
Test ref .
Purpose
Test parameters
US / M §,
reg
displ .
f c
*
1a 9.6.3.1 Bond resistance
Service condition tests
Tension , confined , single reinforcing bar # 4 / 12 -
10.25.2 10.25.3
Bar embed .
l b
Minimum sample size
n min low 7d b Five
1b 9.6.3.1 Bond resistance
Tension , confined , single reinforcing bar # 8 / 25 -
10.25.2 10.25.3
low 7d b Five
1c 9.6.3.1 Bond resistance
Tension , confined , single reinforcing bar d b , max
-
10.25.2 10.25.3
low 7d b Five
1d 9.6.3.1 Bond resistance §§ Tension , confined , single reinforcing bar d b , max
-
1e †† 9.6.3.1 Bond resistance §§ Tension , confined , single reinforcing bar # 4 / 12 -
10.25.2 10.25.3
10.25.2 10.25.3 high 7d b Five high 7d b Five
2 9.6.3.2 Bond / splitting behavior
Tension , confined , reinforcing bars in corner condition
# 8 / 25 - 10.25.6 low 35d b
Six
3 9.6.4.1
4 9.6.4.2
Sensitivity to hole cleaning , dry substrate #, **
Sensitivity to hole cleaning , saturated concrete #, **
Reliability tests
Tension , confined , single reinforcing bar d b , max
≥0.8 10.25.7 low 7d b Five
Tension , confined , single reinforcing bar d b , max
≥0.8 10.25.7 low 7d b Five
5 9.6.4.3
6 9.6.4.4
7 9.6.4.5
8 9.6.4.6
9 9.6.5.1
Sensitivity to freezing / thawing conditions # Tension , confined , single reinforcing bar # 4 / 12 ≥0.9 10.25.7 high 7d b
Five
Sensitivity to sustained load at maximum longterm temperature # Tension , confined ,
single reinforcing bar # 4 / 12 ≥0.9 10.25.7 low 7d b
Five
Decreased installation temperature # Tension , confined , single reinforcing bar # 4 / 12 ≥0.9 10.25.7 low 7d b
Five
Sensitivity to installation direction # Tension , confined , single reinforcing bar d b , max
≥0.9 10.25.7 low 7d b Five
Installation at deep embedment
Installation procedure verification
Bar installation in injected hole , horizontal d b , max
- 10.25.8 - 60d b Three
10
9.6.5.2
Injection verification
Injection in clear tube
d b , max
-
10.25.8
-
60d b
Three
Durability
11a
9.6.6.1.1
Resistance to alkalinity #
Slice test
# 4 / 12
-
10.25.10
low
-
Ten
11b
9.6.6.1.2
Resistance to sulfur #
Slice test
# 4 / 12
-
10.25.10
low
-
Ten
12 9.6.7 Corrosion resistance
13 9.6.8
Seismic qualification for reinforcing bar connections *
Current and potential test
Cyclic tension , confined , single reinforcing bar
Special conditions
# 4 / 12 - 10.25.9 low 2 3 / 4 " Three
d b , max
- 10.25.11 low 7d b Five
14 9.6.8
Seismic qualification for reinforcing bar connections *
Cyclic tension , confined , single reinforcing bar
d b , max
- 10.25.11 high 7d b Five
* For definition of high- and low-strength concrete , refer to 4.3.4 . † Tests performed in test specimens in accordance with Fig . 4.5 and having minimum length / thickness of l b
+ 2 in . ( l b + 50 mm ).
§ Sizes are U . S . customary and European metric d b , max is maximum size sought for recognition . Ⅱ Perform tests with deformed reinforcing bars conforming to the mechanical requirements of 9.6.3.2.1 . # Tests are not required if corresponding test has been performed in accordance with Table 3.1 , 3.2 or 3.3 . ‡ Test bars in three test specimens for a total of six tests with cast-in bars and six tests with post-installed bars . ** Tests shall be required if hold cleaning equipment and technique varies from that used for tests in accordance with Table 3.1 , 3.2 or 3.3 . §§ Optional test . If this test is not performed , the evaluation report shall note that the value of f l to be used in the determination of development and splice lengths in accordance with c
ACI 318 shall not exceed 2500 psi ( 17.2 MPa ). ## Optional test . †† Tests required only if the system has not otherwise been qualified in accordance with Table 3.2 . In addition , Test Nos . 1b and 1d in accordance with Table 3.2 shall be conducted with # 4
( 12 mm ) reinforcing bars at 7db embedment . See 10.25.1.2 .
21 2021