Performance of limestone cement mortars in a high sulfates environment

Pipilikaki, P.; Katsioti, M.; Gallias, Jean-Louis

doi:10.1016/j.conbuildmat.2008.05.001

Cited by 41 publications

(28 citation statements)

References 15 publications

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“…Tsivilis et al [16] showed that a Portland limestone cement exhibited lower water permeability compared to ordinary Portland cement. This is in direct contrast with the findings of Pipilikaki et al [17] who discovered increased permeability associated with the use of limestone cements. Hornain et al [18] discovered that the addition of limestone resulted in reduced chloride diffusion coefficient.…”

Section: Sulfate Resisting Capabilities Of Limestone Cementscontrasting

confidence: 56%

Performance of concrete incorporating GGBS in aggressive wastewater environments

O’Connell

McNally

Richardson

2012

Construction and Building Materials

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Concrete is traditionally used as the main component of wastewater facilities. The sulfate and acidic environment presents significant challenges. Supplementary cementitious materials (SCM) such as GGBS are being used in increasing quantities in concrete and have been shown to provide concrete with increased durability in this particular environment. They have traditionally been used with CEM I, but in recent years a shift in concrete practice has led to the introduction of CEM II cements with reduced CO 2 footprint and obvious environmental and economic benefits. However, the change in cement chemistry associated with using CEM II and GGBS must also be accounted for in concrete specifications for aggressive environments. This has particular importance when concrete is exposed to elevated sulfate and sulfuric acid environments, such as that associated with water and wastewater treatment.The performance of CEM II/A-L cements with varying amounts of GGBS was evaluated through a series of tests conducted to determine their durability characteristics in respect of sulfate attack and sulfuric acid attack. As a benchmark, samples were also tested using CEM I cement, CEM I with GGBS, and a sulfate resistant Portland cement. Results have shown that for all cases, the addition of GGBS resulted in considerable reductions in sulfate induced expansion relative to samples using CEM I or CEM II binders alone. A slight improvement in performance relative to sulphate resisting Portland cement (SRPC) binders was also observed. However in respect of the sulfuric acid environment the regime proved too harsh and ultimately resulted in the early failure of all samples. Some difference in performance was noted, but this was not considered noteworthy. The influence of pH and acid type was studied. The conclusions were that the concretes tested cannot adequately address the durability threat to all parts of wastewater infrastructure over a significant life span due to the extraordinarily harsh nature of this form of attack.

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Section: Sulfate Resisting Capabilities Of Limestone Cementscontrasting

confidence: 56%

Performance of concrete incorporating GGBS in aggressive wastewater environments

O’Connell

McNally

Richardson

2012

Construction and Building Materials

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“…Finally, it must be noted that samples exhibiting higher strengths also exhibited low expansion values when treated with sulfates at increased temperature. The authors have observed a similar behaviour before [10,21] which shows that compressive strength must be regarded as a key factor for durability in high sulfates environments.…”

Section: Compressive Strengthsupporting

confidence: 56%

“…Finally, most researchers agree that DEF is created when the following three conditions coincide and apply: excessive sulfates, high-temperature steam curing and sufficient water supply [7][8][9][10][11][12]. Delayed ettringite is formed into the pores or the cracks of the cement paste due to high sulfate presence.…”

Section: Introductionmentioning

confidence: 99%

How sulfates and increased temperature affect delayed ettringite formation (DEF) in white cement mortars

Adamopoulou

Pipilikaki

Katsiotis

et al. 2011

Construction and Building Materials

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“…This serves as an entry point of corrosion initiation and, hence, the process of corrosion being accelerated in a short period. However, the inclusion of steel is a major application of fibre reinforced concrete and finds potential merits for providing high quality construction without rebar and, hence, any costly treatment method cannot be suitable for surface treatment of steel fibres [3,4]. The process of corrosion in fibre reinforced concrete 2 International Journal of Corrosion is phenomenal due to homogenized steel fibre distribution and, hence, more careful attention has to be provided for designing concrete constituents.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Effects on the Strength Properties of Steel Fibre Reinforced Concrete Containing Slag and Corrosion Inhibitor

Sivakumar

Sounthararajan

Sengottian

2014

International Journal of Corrosion

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Corrosion in steel can be detrimental in any steel rebar reinforced concrete as well as in the case of steel fibre reinforced concrete. The process of corrosion occurring in steel fibre incorporated concrete subjected to corrosive environment was systematically evaluated in this study. Concrete specimens were prepared with steel fibre inclusions at 1.5%(volume fraction) of concrete and were added in slag based concrete (containing manufactured sand) and replaced with cement at 20%, 40%, and 60% of total binder. Accelerated corrosion studies were carried out using alternate wetting and drying cycle accompanied with initial stress at 40% and 60% of ultimate stress. Concrete specimens were then immersed in chloride-free water and sodium chloride solution (3.5%) after subjecting to initial stress. The alternate wetting and drying process of different concrete mixes was continued for longer exposure (6 months). Later, the strength degradation during the accelerated corrosion process was then assessed in compressive and flexural tests. Test results indicated that the strength degradation was marginal in the case of steel fibre reinforced concrete containing higher slag content and for the concretes containing corrosion inhibitors. The maximum strength reduction was noticed in the case of plain concrete containing steel fibres and, with the slag addition, a considerable reduction in corrosion potential was noticed. Also, with the increase in slag replacement up to 60%, a significant increase in strength was noticed in flexural test. Experimental test results also showed that the corrosion process in steel fibre reinforced concrete can be controlled with the incorporation of corrosion inhibitors in cementitious system.

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Performance of limestone cement mortars in a high sulfates environment

Cited by 41 publications

References 15 publications

Performance of concrete incorporating GGBS in aggressive wastewater environments

Performance of concrete incorporating GGBS in aggressive wastewater environments

How sulfates and increased temperature affect delayed ettringite formation (DEF) in white cement mortars

Corrosion Effects on the Strength Properties of Steel Fibre Reinforced Concrete Containing Slag and Corrosion Inhibitor

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