Comparative Study of Strength and Corrosion Resistant Properties of Plain and Blended Cement Concrete Types

Abstract

The relative performances of mechanical, permeability, and corrosion resistance properties of different concrete types were compared. Concrete types were made from ordinary Portland cement (OPC), Portland pozzolana cement (PPC), and Portland slag cement (PSC). Compressive strength test, effective porosity test, coefficient of water absorption, short-term accelerated impressed voltage test, and rapid chloride permeability test (RCPT) were conducted on M30 and M40 grades of concrete designed with OPC, PPC, and PSC cements for 28-and 90-day cured concrete types. Long-term studies such as microcell and electrochemical evaluation were carried out to understand the corrosion behaviour of rebar embedded in different concrete types. Better corrosion resistant properties were observed for PSC concrete by showing a minimum current flow, lowest free chloride contents, and lesser porosity. Besides, PSC concrete has shown less coefficient of water absorption, chloride diffusion coefficient (CDC), and lower corrosion rate and thereby the time taken for initiation of crack extended.

A Study on the Mechanical Properties of Green Concrete

“…The percentage increase in compressive strength from 28 days to 90 days was found to be similar in M30 grade and M40 grade concrete types. Comparable compressive strength values were obtained for Portland Pozzolana Cement and Portland Slag cement types when compared with Ordinary Portland cement concrete strength values [13]. The properties of cement are seen in Table 1.…”

Increasing the Compressive Strength of Concrete Using PPC

“…Concrete that uses PPC has advantages over OPC. The corrosion resistance properties of concrete using PPC are higher than concrete using OPC [4]. Concrete using PPC has better performance than concrete using OPC in sea water [5].…”

Cymbopogon citratusand NaNO2Behaviours in 3.5% NaCl-Immersed Steel-Reinforced Concrete: Implications for Eco-Friendly Corrosion Inhibitor Applications for Steel in Concrete

“…It is worth noting that all steel-reinforced concrete samples in this first set were cured in curing room for 28 days [67,68], as per ASTM C192/192 M-16a [65]. The second set of steelreinforced concrete samples includes three samples that were cast in similar manner to the samples for electrochemical experiment (the first set) but with 0.00% admixture and which were cured in water for 28 days [11,41,69]. These samples of the second set are not subjected to electrochemical corrosion monitoring but are employed in the study as control samples for the compressive-strength testing according to the specification from ASTM C267-01(2012) [70].…”

“…(iii) Corrosion-rate (CR) using the 3-electrode LPR Data Logger from Metal Samples5, whereby saturated calomel electrode (SCE) from EDT direct-ION5 is the reference, brass plate is auxiliary, and the reinforcingsteel embedded in concrete is the working electrode [11,45]: For giving readout of the corrosion-rate directly, this LPR instrument nulls the potential difference between the reference and working electrodes before increasing current flow between the auxiliary and working electrodes. The ratio Δ /Δ , from the shifted working electrode potential (Δ ) relative to the reference electrode by the polarizing current (Δ ), is then used by the LPR instrument to compute the directly readout corrosion-rate on the instrument [15].…”

“…Chloride-induced corrosion of reinforcing-steel in concrete is essentially problematic because chloride ion promotes and accelerates the corrosion reaction via formation of intermediate product but without the chloride ion being consumed through the reaction process [8,9]. The steel-reinforced concrete degradation ensues from rust byproduct of the embedded steel corrosion which is expansive within the concrete, thus causing hoop stress that leads to cracks, spalling, delamination, and loss of load-bearing integrity of the structural member [10][11][12][13][14]. This could lead to insidious failure of the steel-reinforced concrete structure culminating in economic losses, especially, in the bid to avert catastrophic injury to life and property via costly repairs, 2 International Journal of Corrosion rehabilitation, and maintenances of the corrosion-damaged structure [15,16].…”