HIT-FP 700 R REDUCED CURE TIME
Figure 6 is intended for the full cure time of the product for in-service loads, including long-term loading. It may be desired to use a shorter cure time for conditions where the full in-service load is not being applied( i. e. temporary loads during construction). For example, if shoring is removed and the resulting load consists of short-term construction loads that are less than the in-service loads this may be possible.
Additional testing has been conducted on HIT-FP 700 R at reduced cure times. Table 5 provides reduction factors that can be applied at 2 and 3 days after installation at various temperature ranges, while Table 6 provides the number of days of t cure at various temperatures that are needed for 75 % of the full bond performance.
HIT-FP 700 R does not have published bond stresses, rather, it has been shown to be equivalent to a cast-in rebar, which does not use bond stress to calculate development length. To use the values in Table 5 or 6, determine the ratio of applied loads for the temporary load case( i. e. loads during construction) vs. the in-service loads ensuring that this ratio is less than the reduction factor, α, in Tables 5 or 6, based on the specific base material temperature for the project during the cure time.
Table 5— Hilti HIT-FP 700 R temporary load reduction factor for reduced cure time, t cure, reduced
Temperature( T) α
2 days( 48 hours) 3 days( 72 hours) 5 ° C ≤ 10 ° C 41 ° F ≤ 50 ° F 0.35 0.39 11 ° C ≤ 15 ° C 51 ° F ≤ 59 ° F 0.46 0.54 16 ° C ≤ 20 ° C 60 ° F ≤ 68 ° F 0.53 0.60 21 ° C ≤ 30 ° C 69 ° F ≤ 86 ° F 0.60 0.69 31 ° C ≤ 39 ° C 87 ° F ≤ 103 ° F 0.64 0.75
40 ° C 104 ° F 0.75 0.87
Table 6— Hilti HIT-FP 700 R reduced cure time, t cure, reduced, for temporary load at 75 % of in-service capacity
Temperature( T)
Reduced cure time, t cure, reduced for α ≥ 0.75
5 ° C ≤ 10 ° C 41 ° F ≤ 50 ° F 14 days 11 ° C ≤ 15 ° C 51 ° F ≤ 59 ° F 7 days 16 ° C ≤ 20 ° C 60 ° F ≤ 68 ° F 6 days 21 ° C ≤ 30 ° C 69 ° F ≤ 86 ° F 5 days 31 ° C ≤ 39 ° C 87 ° F ≤ 103 ° F 3 days
40 ° C 104 ° F 2 days
14 September 2024