Alsina ALSIPERCHA - Employment and Loading Requirements; Minimum Concrete Strengths for Use

6490009ENLZ / 6790009ENLZ
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11
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Al
sipercha with housing tube Alsipercha System
Employment and Loading of the system
Table of minimum concrete strengths
Shown below are the time periods for use (the time between pouring
column concrete and when the Alsipercha can be used) depending on
ambient temperature and column cross-section.
The results shown below are from tests performed with Alsipercha in
columns measuring 30 x 30 cm
2
, 25 x 25 cm
2
and 15 x 40 cm
2
.
AMBIENT TEMPERATURE
Type of
concrete
Column
section (cm
2
)
Min.
compression
value
(Mpa)*1
Indirect tensile
value (Mpa)*1
5ºC 10ºC 15ºC ≥20ºC
Any type of
structural
concrete
(HA-25 or
superior)
30 x 30 (or
superior) *2
3.27 0.37 28 h 23 h 19 h 15 h
Time
periods
for use in
hours
25 x 25 *3 4.72 0.52 30 h 24 h 20 h 16 h
15 x 40 *3 5.70 0.62 32 h 26 h 21 h 17 h
(*1) When using the system for the fi rst time.
(*2) For sections of 30x30 cm
2
or greater, the system allows for a
maximum deviation in the position of the housing tube of 50 mm
from the center of the column.
(*3) For sections of 25x25 cm
2
and 15x40 cm
2
, the system allows for a
maximum deviation in the position of the housing tube of 10 mm
from the center of the column. Based on the tolerances allowed
by the Spanish EHE Standard for deviation in column
cross-sectional dimensions.
Info . Study performed by the Universidad Politécnica de
Valencia.