Product Technical Guides : US-EN Post-Installed Rebar Guide | January 2023 | Página 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

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

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

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

* 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 November 2022