Proposal of a method for service life prediction of a concrete structure: a case study

André Barros Bolzani Petersen ²E-mails: 2 andrebbpetersen@gmail.com

Universidade do Vale dos Sinos - UNISINOS, Escola Politécnica, São Leopoldo - Rio Grande do Sul - Brasil.

Felipe Mattos Albertini ³ 3 felipealbertini11@gmail.com

Universidade do Vale dos Sinos - UNISINOS, Escola Politécnica, São Leopoldo - Rio Grande do Sul - Brasil.

Bernardo Fonseca Tutikian ⁴ 4 bftutikian@unisinos.br

Universidade do Vale dos Sinos - UNISINOS, Escola Politécnica, São Leopoldo - Rio Grande do Sul - Brasil.

n	Beam 01	Column 01	Beam 02	Column 02
1	69.00	60.50	68.00	64.00
2	64.50	59.00	62.50	61.00
3	69.50	67.00	61.50	64.00
4	67.50	63.00	60.00	62.50
5	73.50	65.50	60.50	55.50
6	73.00	71.50	59.00	61.50
7	60.50	66.50	65.00	60.00
8	69.00	58.50	66.00	60.00
9	70.00	61.00	67.00	59.00
10	72.00	60.00	65.00	63.00
11	66.00	61.00	70.00	63.00
12	65.50	61.50	63.00	64.00
13	70.50	63.00	58.50	67.00
14	68.50	61.50	64.50	66.00
15	67.00	57.00	64.00	63.00
16	60.50	63.00	64.50	60.00
Average	68.75	61.50	64.25	62.75
Standard deviation	3.85	3.67	3.26	2.84
Conversion of the obtained values according to the equipment graphic	55 MPa	51 MPa	52 MPa	51.50 MPa

-	Sample		1	2	3	4
-	-	Unit	Beam 01	Column 01	Beam 02	Column 02
-	Surface compressive strength	MPa	55	51	52	51.5
-	Concrete cover thickness	mm	20	20	19	28.5
-	Carbonated depth	mm	3	3.1	2.9	4.4
A	Structure's life in service	years	2
-	k (Eq. 3)	mm/√year	2.12	2.19	2.05	3.11
B	t (Eq. 3)	years	88.89	83.25	85.85	83.91
C (B - A)	Remaining service life	years	86.89	81.25	83.85	81.91