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The Paulo Guerra Bridge in Recife, Brazil, was constructed in 1977. After about 15 years some pathological symptoms appeared, such as map cracking, concrete expansion, steel corrosion, and leaching stains. This paper presents a discussion of the specific inspections conducted, which included visual observation of the foundation blocks (pile caps), core extraction, ultrasonic pulse velocity tests, carbonation tests, measurements of chloride concentration, electrochemical resistivity, corrosion potential, compressive strength, and modulus of elasticity as well as X-ray diffraction and microscopy evaluations. The results of the inspection showed the occurrence of generalized alkali-aggregate reactions ( AARs) on the pile caps (foundation blocks) of the bridge. The recommended repair for the pile caps was confinement to resist tensile stresses of 4 MPa. [ABSTRACT FROM AUTHOR]

Latin American seminar on conceptual design and applications of precast concrete structures fib days India 2011 MC2010 presentations 3rd International Symposium on UHPC (HiPerMat 2012) fib short course: Concrete Structures in Fire, South Africa 2013 fib Achievement Award for Young Engineers fib Bulletins ICCS13, Tokyo: Call for papers Ibero-American congress 2012 What is the 'Impact Factor'? Short notes Congresses and symposia Acknowledgement [ABSTRACT FROM AUTHOR]