Effect of limestone fillers on CO2 and water vapour diffusion in carbonated concrete

Steiner, Sarah; Proske, Tilo; Winnefeld, Frank; Lothenbach, Barbara

doi:10.1016/j.cement.2022.100027

Cited by 6 publications

(7 citation statements)

References 42 publications

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“…Since the curing conditions have a large impact on the carbonation front propagation, a minimal curing period of 7 days was adopted. Applying these filters led to 75 experimental results of carbonation depth measured under natural indoor and sheltered outdoor conditions [12,13,16,18,25,26,[49][50][51][52][53][54][55][56], on which the regression analysis was performed. Those data originate from 14 different laboratories; however, from some experimental campaigns, only 2 or 3 measured data satisfied the mentioned conditions and were included.…”

Section: Methodsmentioning

confidence: 99%

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Service Life Design of Concrete Structures Made of High-Volume Limestone Powder Concrete—Case of the Carbonation-Induced Corrosion

Carević,

Marinković,

Plavšić

et al. 2023

Buildings

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One of the paths to CO2 emissions reduction in the concrete industry is to use low-clinker cements, providing at the same time the performance of concrete that is adequate for application in concrete structures. This paper explores the impact of the clinker replacement with high amounts of limestone powder (21–70% in the powder phase) on concrete carbonation resistance. To quantify this impact, the empirical relationship between the carbonation resistance and the compressive strength of the high-volume limestone powder concrete (HVLPC) was established. For that purpose, the regression analysis was applied on the experimental results collected from the published research. The service life analysis based on the full probabilistic approach was performed using the fib Model Code 2010 prediction model and proposed empirical relationship. The first-order reliability method (FORM) was applied to solve the limit state function of reinforcement depassivation with a reliability index equal to 1.3. The obtained minimum concrete cover depths were 40–110% higher compared to those prescribed in the current European standard EN 1992-1-1:2004 for indicative strength classes. Based on the full probabilistic analysis, recommended cover depths are given for all carbonation exposure classes, commonly applied concrete strength classes, and service lives of 50 and 100 years.

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Section: Methodsmentioning

confidence: 99%

“…The data presented in this study are openly available at https://doi. org/10.17632/5pgnmw827v.1, literature [49], as well as in cited literatures [12,13,16,18,25,26,[50][51][52][53][54][55][56].…”

Section: Data Availability Statementmentioning

confidence: 99%

Service Life Design of Concrete Structures Made of High-Volume Limestone Powder Concrete—Case of the Carbonation-Induced Corrosion

Carević,

Marinković,

Plavšić

et al. 2023

Buildings

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“…Die thermodynamische Standarddatenbank PSI/Nagra 12/07 TDB [13] wurde um die zementspezifische Datenbank Cemdata18 [14] [8] entnommen werden. Auf Basis der empirisch ermittelten Daten wurden in [8] zwei Modelle entwickelt, die in dem hier vorgestellten thermodynamisch-analytischen Ansatz zur Berechnung des CO2-Diffusionskoeffizienten (DCO2) zum Einsatz kommen. Die Messungen zur CO2-Diffusion in Betonen aus kalksteinreichem Zement ergaben zwei grundlegende Zusammenhänge, aus denen der DCO2 bestimmt werden kann.…”

Section: Thermodynamische Modellierungunclassified

“…Für Proben mit w/kl-Werten ≥ 0,55 erfolgte die Berechnung des 𝐷 CO2 mit: Die theoretischen Zusammenhänge zwischen CO2-Diffusion und CO2-Bindevermögen während der Karbonatisierung können auf der Grundlage des ersten Fick´schen Gesetzes beschrieben werden [1; 22]. Unter Verwendung der DCO2-Teilmodelle nach [8] und der Abschätzung des CO2-Bindevermögen über die Ca-haltigen Hydratphasen kann das Modell zur Simulation der theoretischen Karbonatisierungsraten in einem intakten Beton unter natürlichen Bedingungen (atmosphärische CO2-Konzentration, 65% r.F. und 20°C) durch die folgende Gleichung beschrieben werden: Der Einfluss des Hydratationsgrades kann bei diesem Ansatz daher vernachlässigt werden.…”

Section: Thermodynamische Modellierungunclassified

Thermodynamisch‐analytische Modellierung der Karbonatisierung in Betonen aus klinkerreduzierten Zementen

Steiner,

Winnefeld,

Proske

et al. 2023

ce papers

Self Cite

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KurzfassungDas Bestreben, die Umwelteinwirkungen von Zement und Beton zu verringern, wird zukünftig zum vermehrten Einsatz klinkerreduzierter Zemente führen. Etablierte Modelle zur Vorhersage der Karbonatisierungstiefe (xc) sind aber häufig auf Betone aus handelsüblichem Zement beschränkt. In diesem Beitrag werden die Karbonatisierungsraten von Beton aus Zement mit bis zu 60 Gew.‐% Kalksteinmehl (LS) und w/z‐Werten von 0,3 bis 0,75 untersucht. Zur Abschätzung der xc wurde ein gekoppeltes analytisch‐thermodynamisches Modell entwickelt. Der vorgeschlagene Modellierungsansatz beinhaltet die thermodynamische Berechnung der effektiven CO2‐Bindekapazität und einen analytischen Ansatz zur Abschätzung des CO2‐Diffusionskoeffizienten. Die gute Übereinstimmung zwischen berechneten und experimentell (XRD und TGA) ermittelten Phasenzusammensetzungen zeigt, dass thermodynamische Teilmodelle eine Möglichkeit bieten die Vorhersagegenauigkeit der xc zu verbessern. Die größten Abweichungen zwischen simulierten und tatsächlichen xc wurden bei dichtem Beton beobachtet. Die Untersuchungen und Modellierungen ergaben, dass die betontechnologisch optimierten, klinkerreduzierten Betone mit bis zu 60 Gew.‐% Kalksteinmehl ähnlich hohe Karbonatisierungswiderstände aufweisen können wie Beton aus CEM I 52.5 R.

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“…In concrete, cement is the main ingredient. The rapid growth of the building industry is driving the increasing demand for cement, increasing the production of cement clinker associated with high-energy consumption and more signi cant CO 2 emissions (Steiner et al 2022). The global construction industry emits 23% of the total CO 2 produced by global economic activity (Thomas 2018).…”

Section: Introductionmentioning

confidence: 99%

An investigation on the mechanical and microstructural properties of pigeon pea stalk ash concrete: An approach towards environmental sustainability

Krishnan

Subramanian

2022

Preprint

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The concept of sustainability in agricultural residue management has gained increasing traction around the world in recent years. After harvesting, large volumes of waste are generated that are often dumped into the environment, causing pollution. In addition to preventing environmental degradation, these wastes can also be used in the concrete industry to reduce mineral resource depletion. With this approach, sustainable development is possible. According to the results of this investigation, the effect of pigeon pea stalk ash (PPSA) as a partial replacement of cement in concrete, a series of experimental tests were performed. It has been found that the compressive strength increases for the mixes from 4 to 8% of cement replacement. In contrast, the strength decreases when the percentage replacement of pigeon pea stalk ash with cement exceeds 8%. Based on the experimental results, concrete infused with 8% pigeon pea stalk ash increased its compressive strength by 6.96%. The compressive strength decreased with a further increase in PPSA content. Although the split tensile strength value of PPSA8 concrete was same value compared to the control concrete, even an 8% PPSA concrete has higher strength than other replacement levels. Concrete with 8% PPSA content was observed to have a higher flexural strength than control concrete. PPSA concrete was prepared with pigeon pea stalk waste up to 8% substitution of cement. PPSA concrete has reduced permeability and higher resistance to acid attack. All the strength and durability test results revealed that PPSA concrete type was superior to the control concrete in terms of mechanical qualities and durability characteristics. The present work discusses concrete's improved economic and environmental aspects with incorporated pigeon pea stalk ash. Hence, this study points toward the highest potential use of more concerned about agricultural wastes like pigeon pea stalk ash in green concrete.

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Effect of limestone fillers on CO2 and water vapour diffusion in carbonated concrete

Cited by 6 publications

References 42 publications

Service Life Design of Concrete Structures Made of High-Volume Limestone Powder Concrete—Case of the Carbonation-Induced Corrosion

Service Life Design of Concrete Structures Made of High-Volume Limestone Powder Concrete—Case of the Carbonation-Induced Corrosion

Thermodynamisch‐analytische Modellierung der Karbonatisierung in Betonen aus klinkerreduzierten Zementen

An investigation on the mechanical and microstructural properties of pigeon pea stalk ash concrete: An approach towards environmental sustainability

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