Abstracts Book - IMRC 2018

• SE4-P038
EVALUATION OF PRESTRESSED CONCRETE BEAMS ATTACKED BY
ACCELERATED CORROSION
Ramon Antonio Figueroa Carranza 1 , Wilfrido Martinez Molina 2 , Hugo Luis Chávez García 2 , Elia
Mercedes Alonso Guzman 2 , Cindy Lara Gomez 2 , Andres Antonio Torres Acosta 3 , Maybelin
Carolina Garcia Chiquito 2 , Arturo Zalapa Damian 1 , Isaias Trujillo Calderon 2 , Elizabeth Contreras
Marin 4
1 Universidad Michoacana de San Nicolás de Hidalgo, Chemical and Civil Engineering Faculties,
Mexico. 2 Universidad Michoacana de San Nicolás de Hidalgo, Civil Engineering Faculty, Mexico.
3 Universidad Marista de Queretaro, Civil Engineering School, Mexico. 4 Universidad de Sevilla,
Escuela Tecnica Superior de Arquitectura, Spain.
The following study shows the results obtained in pre-streses beams after of
accelerated corrosion process by appliying galvanic current. The beams were
contaminated intentionally in the middle third with 1% NaCl relative of the
cement mass, this action with the finality to accelerate the corrosion process in
that area. The measurement of the beams was made before and after to the
galvanic current connection, this action with te objetive to know the crack
propagation (length and width). The investigation was made in two phases, the
first one were studied the beams VCPC1 to VCPC3 (VCPC means that was
affected with corrosion). The second one were evaluated VCPC4 to VCPC6
beams. The specimens were in contact with the galvanic current 64 days and
121 days respectively. A comparison was made between the beams that were
subjeted to low and high corrosion and the base beams (with out corrosion and
NaCl). When the corroded beams were evaluated, it had a decrease of the
48.3% in the flexion stress capacity. The Steel mass loss was higher in corroded
beams than base beams too (14% high corrosion beams, 10% low corrosion
beams) and consequently the tension stress capacty of the pre-streses Steel was
affected too.
Acknowledgment:
The authors wish to thank to “Luis Silva Ruelas” Materials Laboratory in the Civil
Engineering Faculty of the Universidad Michoacana de San Nicolas de Hidalgo,
PFCE-SEP, CIC-UMSNH and CONACYT for the sponsorship
Keywords: concrete, corrosion, pre-stressed
Presenting authors email: ramanfic@gmail.com