Correlation of Compression Resistance and Rupture Module of a Concrete of Ratio w/c = 0.50 with the Corrosion Potential, Electrical Resistivity and Ultrasonic Pulse Speed

Abstract

Reinforced concrete is one of the most used materials in the construction industry, in which the quality specifications necessary for its acceptance must be met. In the present work, the main focus is on studying the correlation that exists between the tests of resistance to compression and bending with the electrochemical test of corrosion potentials, electrical resistivity and ultrasonic pulse velocity. Specimens of hydraulic concrete with a water/ cement ratio, (w/c) = 0.50, were made according to the ACI 211.1 design method, which is based on the physical characteristics of the aggregates and is the most used in the premix plants. The study was carried out during the hydraulic concrete curing stage in which very favorable results were obtained in the correlation that exists between conventional tests and non-destructive and electrochemical tests.

Effect of the Type of Curing on the Corrosion Behavior of Concrete Exposed to Urban and Marine Environment

“…It can be seen unlike the urban environment, that the marine environment is very aggressive, which confirms what is mentioned in the literature [24]. But what needs to be analyzed is how the corrosion kinetics behavior of each specimen, highlighting the importance of concrete quality and type of curing, that as indicated by the concrete quality community or the relation w/c ratio used, the concrete will present important mechanical and durability characteristics such as resistivity and ultrasonic pulse, which correlates with corrosion resistance [25]. Although the aggressiveness of the medium is observed from the first 60 days of exposure presenting all specimens values greater than 0.2 µA/cm 2 , it can be seen relatively better performance of low water cement specimens, those of 0.45, highlighting whether it can be considered that way, the specimen cured with norm 4NM which presented Icorr below 0.5 µA/cm 2 until day 180, moderate corrosion level, followed by specimens with curing type in Work and Without Curing, which kept the level of corrosion moderate, until before the 150 days of exposure with lower values than 0.5 µA/cm 2 .…”

Corrosion of AISI 316 Stainless Steel Embedded in Sustainable Concrete made with Sugar Cane Bagasse Ash (SCBA) Exposed to Marine Environment

“…All bars and were cleaned to remove any impurities that might have been present on them [22][23] and the manufacture of the test specimens was performed as indicated in the standard ASTM C 192 [24].…”

Effect of the Addition of Sugar Cane Bagasse Ash on the Compaction Properties of a Granular Material Type Hydraulic Base

“…Portland Cement (PC), which is the most used construction material in the world and that its manufacture, in addition to requiring more than 4000 KJ per ton of cement, emits between 850 kg to 1000 kg of CO2 per ton of Portland cement produced, having in the year 2012 a world production of Portland Cement of more than 3,800,000 tons worldwide, with its respective emission of at least 3,230,000 tons of CO2 [2]. In addition to this environmental problem, the Civil Works are not complying with the durability necessary to reach the useful life for which they were designed, with the main cause of their deterioration being the corrosion of the reinforcing steel used in reinforced concrete structures [3]- [9] a pathology that occurs mainly due to the exposure of sulfates [10], [11] or chlorides [12]- [15]. The corrosion of the steel in structures built on the basis of mechanically reinforced soils is of great importance in the structural integrity and durability of such works, as has been shown in some investigations [16], [17].…”