Durability of Concrete Containing Calcined Clays: Comparison of Illite and Low-Grade Kaolin

Cordoba, Gisela; Zito, Silvina Vanessa; Tironi, Alejandra; Rahhal, Viviana Fátima; Irassar, Edgardo F.

doi:10.1007/978-981-15-2806-4_70

Cited by 7 publications

(4 citation statements)

References 8 publications

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“…For natural carbonation, the observed carbonation rates are approximately comparable at low clinker replacement rates [40]. Lower carbonation resistance is also reported when metaillite is used [42]. With natural carbonation, Achenbach et al [43] observe a carbonation rate equivalent to OPC.…”

Section: Introductionmentioning

confidence: 92%

Hydration and Carbonation of Alternative Binders

Kraft

Achenbach

Ludwig

et al. 2022

CMD

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The cement industry gains increasing public attention because of the high CO2 emissions for which it is accountable. One approach to improve the carbon footprint of cement production is the development of alternative binders, which can be produced with less energy consumption. These alternative binders have a reduced clinker to cement ratio or contain no Portland cement at all. For the corrosion protection of the reinforcement, the same requirements apply as for standardized types of cement. To perform this evaluation, a basic understanding is necessary of the products formed during hydration, the composition of the pore solutions and pore structure, and their influence on the resistance to carbonation. In this study, various alternative binders, such as novel types of composite cement with calcined clays or modified steel mill slag, alkali-activated materials, CA cement, and a C-S-H binder, are presented. The conducted investigations at mortars and cement pastes show the differences in hydration, microstructure development, and pH. The changes in microstructure and phase assemblage due to carbonation and the suitability of carbonation testing at an elevated CO2 content of 1 vol.-% for the different binders are also presented.

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Section: Introductionmentioning

confidence: 92%

Hydration and Carbonation of Alternative Binders

Kraft

Achenbach

Ludwig

et al. 2022

CMD

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“…Illitic calcined clay (ICC) has been less investigated, and some authors consider that ICCs have a low reactivity [20] while others report good performance after 28 days [23]. Concrete performance with blended cements containing different calcined pozzolans has been compared recently [24,25]. Also, the combination of ICC and limestone filler (LF) was recently studied [26].…”

Section: Introductionmentioning

confidence: 99%

Sulfate performance of blended cements (limestone and illite calcined clay) exposed to aggressive environment after casting

Rossetti

Ikumi

Segura

et al. 2021

Cement and Concrete Research

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“…The increased reactivity of sodium bentonite to calcium hydroxide, which is liberated during cement hydrolysis, results in the formation of pozzolanic cementation bonds. Such bond formation has a positive impact because it results in an improved microstructure, tighter pores, and increased strength [46][47][48].…”

Section: Bentonitementioning

confidence: 99%

Investigating the Consolidation Behaviour of Cement-Bentonite Barrier Materials Containing PFA and GGBS

Walenna

2023

Civ Eng J

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Cement-Bentonite (CB) barriers are expected to become a sustainable and reliable engineering solution. The deformation of CB is of interest to engineers to comprehend, particularly how CB responds to changes in loading during its construction and service life. The purpose of this study was to examine how samples of CB mixtures behaved during consolidation. This study investigated: (1) the influence of curing time and constituent materials on the consolidation properties of CB samples, (2) the volumetric change and the rate of volumetric change in response to a specific loading condition via consolidation tests. For this purpose, a laboratory consolidation test with a load range of 50 to 3200 kPa was carried out in accordance with BS 1377-7:1990 using the oedometer apparatus. This study discovered that the consolidation characteristics of CB samples are similar to those of overconsolidated soil. The CB sample became more resistant to consolidation under varying loads as curing progressed. The presence of more bentonite resulted in an increase in the recompression index. The inclusion of GGBS contributed to the consolidation characteristics of CB through the following mechanisms: (1) the significant decrease of the degree of consolidation with a curing period longer than 28 days, despite the slow strength development of the early-age curing; (2) the increase of the preconsolidation pressure; and the addition of GGBS was found to be more effective than the addition of more bentonite in increasing the preconsolidation pressure. Doi: 10.28991/CEJ-2023-09-03-02 Full Text: PDF

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Durability of Concrete Containing Calcined Clays: Comparison of Illite and Low-Grade Kaolin

Cited by 7 publications

References 8 publications

Hydration and Carbonation of Alternative Binders

Hydration and Carbonation of Alternative Binders

Sulfate performance of blended cements (limestone and illite calcined clay) exposed to aggressive environment after casting

Investigating the Consolidation Behaviour of Cement-Bentonite Barrier Materials Containing PFA and GGBS

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