Concrete Repair Strategies

CONDI�ION ASSESSMEN� AND CONCRE�E REPAIR S�RA�EGIES A� �A�ER �REA�MEN� S�R�C��RES

S�EPHEN FOS�ER �ISS, JANNE�, ELS�NER ASSOCIA�ES, INC.

O��LINE OF PRESEN�A�ION •

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O��LINE OF PRESEN�A�ION •

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BACKGRO�ND INFORMA�ION ��: •

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30 �� D��

BACKGRO�ND INFORMA�ION S��: •

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I� �� 1986 128 �� 39 �� 5,000 �� 34.4 MP�� 10 �� M�� H2O

��PICAL BEAMS B��: •

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220 �� 1�� 8�� 305 �� 203 �� E��

��PICAL GIRDER G��: •

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106 �� 18 �� 457 �� 16 �� 4.9 ��

��PICAL PIER P��: •

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208 �� 14 �� 356 �� 3 �� 3�1/2 �� 0.9 �� 1.1 ��

PRE�IO�S REPAIRS ON �F2 •

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GOALS OF ASSESSMEN� ��: •

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30 �� D��

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GOALS OF ASSESSMEN� ��: •

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ASSESSMEN� S�RA�EGIES •

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�IS�AL/ACO�S�IC/CO�ER S�R�E� 100% �� A�� S�� O�� 575 �� A��. C��: 1.19 ��. �30 �� 2.06 ��. �52 ��

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I�� D�� N�� L�� H��C��, C�� , & C��

�IS�AL/ACO�S�IC/CO�ER S�R�E� L�� (�� ) ��

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HALF�CELL PO�EN�IAL AS�M C876: �� >�200�� = 90% �� <�350 �� 90% ��

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I�� F��: ��, ��, ��, ��, ��

HALF�CELL PO�EN�IAL I�� R��: •

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D�� A�! M��  �� �� �� L��

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D�� A�! M��  �� �� �� L��

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G�� = �� F�� L��


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D�� A�! M��  �� �� �� L��

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�� HCP �� = ��


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D�� A�! M��  �� �� �� L��

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�H�� = ��

HALF�CELL PO�EN�IAL AS�M C876: •

>�200�� = 90% �� <�350 �� 90% ��

M��

HALF�CELL PO�EN�IAL •

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CORROSION RA�E �ES�ING G��M <0.1μA/��2= ��

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>0.1 �� <0.5 μA/��2 = �� >0.5 �� <1 μA/��2= ��

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>1 μA/��2= �� . ��

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M�� (��G�� E��) �� B��=0.05μA/��2 G�� = �� = 0.35 μA/��2

CARBONA�ION �ES�ING �� : �H 12�14 P�� : �H 9.5�11 P��: �� = �H>9 25 �� = �1 ��. �25 ��

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C�� 0.04 �� 1 ��/�� M�� + �� + �� H = ��

CARBONA�ION �ES�ING �� : 25 �� = �1 ��. �25.4�� M�� R.H. 50� 70% C�� . �� 1 ��. �25 ��

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CO2 ��

C�� : �� < �� <�� MEAS�RED CARBONA�ION DEP�HS, IN. �MM�

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0.25 �6.4�

0.25 �6.4�

0.25 �6.4�

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0.25�6.4�

0.75 �19.1�

0.53 �13.6�

P��

0.38 �9.5�

1.00 �25.4�

0.57 �14.5�

GRO�ND PENE�RA�ING RADAR R��: GPR �� 74 �� 196 �� , ��

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PE�ROGRAPH� & COMPRESSI�E S�RENG�H AS�M C856 ��

AS�M C42 ��

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A�� 0.4 �� 0.5 �/� ��

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N� A��/DEF A��. �� = 6,740 �� 46.5 MP��

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RAPID CHLORIDE PERMEABILI�� AS�M C1202

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M�� : –

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480 �� 1015 �� A�� = 800 �� = ��

S�LFA�E CON�EN� & SOIL �ES�ING AS�M C265 �� AS�M C1580 ��

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C��: 1.4% (�� ) �� 0 �� 1 ��. �25 �� = 1.5 � �� : 0.1% (�� ) = �� ACI 318

CHLORIDE CON�EN� ANAL�SIS AS�M C1152 ��

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AS�M C1218 �� •

C�� . �� C�� : –

0.2% ��

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350 ��

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�1 ��/��

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CHLORIDE CON�EN� ANAL�SIS B�� = 70 �� R�� C��  420�� H�� : ��  A�� D��

CHLORIDE CON�EN� ANAL�SIS P��: >500 �� B��/G��: <400 �� : 500�800 ��

RES�L�S OF ASSESSMEN� •

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BEAM RES�L�S A��. C�� = 1.54 ��. �39 �� C�� = 0.25 ��. �6.4 ��

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HCP = 20% �� C�� = <400 ��

C�� C�� HCP ��

GIRDER RES�L�S A��. C�� = 1.5 ��. �38 �� C�� = 0.53 ��. �13.6 �� HCP = 35% �� N� ��

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�� 20% ��

GIRDER RES�L�S A��. C�� = 1.5 ��. �38 ��

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C�� = 0.53 ��. �13.6 ��

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HCP = 35% �� N� ��

C�� / ��

PIER RES�L�S A��. C�� = 1.2 ��. �30 ��

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A��. C�� = 0.57 ��. �14.5 �� HCP = 40% �� •

C�� = 300�500 ��

C�� . � �� L�� & �� = �� , ��

PERIME�ER �ALL RES�L�S C�� : < 1 ��. �25 ��

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H�� (400 �800 ��)

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D�� I�� D�� / �� P�� / ��

SLAB RES�L�S A��. C�� = 2 ��. �51 �� A��. C�� = 0.5 ��. �13 �� C�� = 100�200 ��

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N� �� /�� I�� (�1�2 ��. ��.) C�� ; ��

SER�ICE LIFE MODEL G��: 30 �� F�� ? H�� ? A�� ?

SER�ICE LIFE MODEL E�� P�� C�� = 22 ��

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SER�ICE LIFE MODEL M�� : �� • • • •

M�� = M�� B�� & G�� 25 �� 30 �� 10% ��

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REPAIR S�RA�EGIES •

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50% ��

REPAIR S�RA�EGIES R�� : •

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REPAIR S�RA�EGIES R�� : •

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REPAIR S�RA�EGIES F�� L�� M�� : •

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RECOMMENDA�IONS FOR �ALL F�� L�� M�� : •

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CONCL�SIONS •

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D�� F�� C�� F�� 10% �� C�� D��

Concrete Repair Strategies

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