Influence of crack frequency on reinforcement corrosion in concrete

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Cement and Concrete Research

DOI:https://doi.org/10.1016/S0008-8846(96)85022-8· OSTI ID:227998

Arya, C; Ofori-Darko, F K ^[1]

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1. South Bank Univ., London (United Kingdom). Div. of Civil Engineering

The relationship between crack frequency and reinforcement corrosion was investigated using two models: (a) reinforced concrete beams, 1.36 m long, containing 0, 1, 4, 8, 12, 16 or 20 parallel sided cracks of equal width giving in each case a sum total width of 2.4 mm and (b) a 4 m long beam containing a 20 mm diameter bar in nineteen segments, ten 352 mm long stainless steel segments and nine 10 mm long mild steel segments which simulated the position of cracks. Corrosion was initiated (a) by spraying the beams with a 3% chloride solution and (b) by using concrete dosed with 5% Cl (by weight of cement). The weight loss due to corrosion of the reinforcement was estimated via linear polarization resistance and/or galvanic current measurements using a zero resistance ammeter. The results obtained from both models suggest that decreasing the frequency of cracking leads to a decrease in corrosion. Possible implications of this finding on the design of concrete structures are discussed.

• OSTI ID: 227998
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 3 Vol. 26; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHLORIDES
CORRELATIONS
CORROSION
CORROSIVE EFFECTS
CRACK PROPAGATION
MEASURING METHODS
REINFORCED CONCRETE