A review of chloride transport in alkali-activated cement paste, mortar, and concrete

Osio-Norgaard, Jorge; Gevaudan, Juan Pablo; Srubar, Wil V.

doi:10.1016/j.conbuildmat.2018.07.119

Cited by 70 publications

(35 citation statements)

References 126 publications

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“…In many steel-reinforced concrete applications, the service life of a structure or element is governed by the ability of the concrete to protect the steel from chloride-induced corrosion. The rate and mechanisms of chloride transport in AAMs have been reviewed in detail by Osio-Norgaard et al [214]. Thomas et al [215,216] have provided a comparison of chloride test methods as applied to these materials.…”

Section: Durabilitymentioning

confidence: 99%

Recent progress in low-carbon binders

Shi

Provis

2019

Cement and Concrete Research

490

131

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The development of low-carbon binders has been recognized as a means of reducing the carbon footprint of the Portland cement industry, in response to growing global concerns over CO2 emissions from the construction sector. This paper reviews recent progress in the three most attractive low-carbon binders: alkali-activated, carbonate, and belite-ye'elimite-based binders. Alkali-activated binders/materials were reviewed at the past two ICCC congresses, so this paper focuses on some key developments of alkali-activated binders/materials since the last keynote paper was published in 2015. Recent progress on carbonate and belite-ye'elimite-based binders are also reviewed and discussed, as they are attracting more and more attention as essential alternative low-carbon cementitious materials. These classes of binders have a clear role to play in providing a sustainable future for global construction, as part of the available toolkit of cements.

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Section: Durabilitymentioning

confidence: 99%

Recent progress in low-carbon binders

Shi

Provis

2019

Cement and Concrete Research

490

131

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“…About 80% of the structural failure was caused by the chloride penetration in the reinforced concrete according to the statistics [6]. Steel corrosion induced by chloride penetration is generally considered as a durability issue of the reinforced concrete around the world, especially for some environmental considerations [7,8]. Moreover, the chloride penetration behavior is closely related to the mix proportion, pore structure, water content, and the exposed environment of concrete.…”

Section: Introductionmentioning

confidence: 99%

Effects of an Applied Load on the Chloride Penetration of Concrete with Recycled Aggregates and Recycled Powder

Duan

2019

Advances in Civil Engineering

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Recycled aggregate (RA) and recycled powder (RP) are the primary products of the reclamation of construction and demolition (C&D) wastes, and the question of how to use them to prepare recycled aggregate concrete (RAC) and recycled powder concrete (RPC) has been a hot topic in the construction industry in China. As concrete structures are frequently subjected to the effects of both applied loads and chloride attacks, it is necessary to examine their effects on both RAC and RPC, which have received little consideration in previous investigations. In this study, RAC and RPC were firstly prepared by using RA and RP, respectively, to replace natural coarse aggregate and cement by weight. For each type of recycled concrete, sustained load and repeated load tests were then conducted, followed by a chloride diffusion experiment after unloading. The results indicated that the chloride penetration increased with the loading degree as well as the repeated load cycles. As the RP used in this study has high fineness and activity, the chloride penetration of RPC was lower than that of natural concrete, while the opposite result was found in RAC. Besides, the correlation between the chloride diffusivity and the imposed loading damage was also established in this study.

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“…The early corrosion of AASFA and AAIS with respect to AAS is probably associated with the porosity effect and the chloride binding capacity (P cb ). As has already been shown, low Ca systems have higher porosity and permeability compared to high Ca systems [13,14]. In addition, chloride ingress is partly hindered by higher binding capacity of high Ca systems due to chloride uptake by hydrotalcite and physical adsorption on C-A-S-H gel and possible precipitation of Friedel's Salts [15,16].…”

Section: Resultsmentioning

confidence: 96%

Korozijski potencijal čelika ugrađenog u alkalno-aktiviranu zguru

Runci¹,

Serdar²

2019

6th Symposium on Doctoral Studies in Civil Engineering

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Alkali-Activated Materials (AAMs) are a group of free clinker binders that are based on aluminosilicate powder and an alkali activator. AAMs have shown high performance in many areas and have attracted great interest because of their lower environmental impact compared to ordinary Portland cement. The aim of this paper is to offer a first assessment on the safety of application of AAMs in marine environments, or where de-icing salts are used. The paper focuses on the alkali-activated ground-granulated blast furnace slag in combination with other by-products originating from Southeast Europe. The setup used to evaluate the corrosion behaviour consists of structural steel plates covered with a layer of mortar, and with tap water or a simulated seawater solution. The corrosion behaviour of structural steel plates was monitored by means of the Open Circuit Potential (OCP).

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A review of chloride transport in alkali-activated cement paste, mortar, and concrete

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Cited by 70 publications

References 126 publications

Recent progress in low-carbon binders

Recent progress in low-carbon binders

Effects of an Applied Load on the Chloride Penetration of Concrete with Recycled Aggregates and Recycled Powder

Korozijski potencijal čelika ugrađenog u alkalno-aktiviranu zguru

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