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

Rossetti, Agustín; Ikumi, Tai; Segura, Ignacio; Irassar, Edgardo F.

doi:10.1016/j.cemconres.2021.106495

Cited by 31 publications

(14 citation statements)

References 60 publications

(81 reference statements)

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“…As the weight of the samples decreased, the compressive strength decreased with an R 2 value of 0.9746, signifying a good fit. The performance of the concrete containing steel slag and calcined clay was due to the low porosity of the blended cement concrete, confirmed in the chloride permeability test results in Figure 10 and consistent with the works of previous researchers [59]. The addition of the two pozzolans contributed to the refinement of the pore structure within the concrete matrix.…”

Section: Sulphate Resistancesupporting

confidence: 89%

Properties of Self-Compacting Concrete (SCC) Prepared with Binary and Ternary Blended Calcined Clay and Steel Slag

Boakye,

Khorami

2024

Infrastructures

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The recent emphasis on sustainable development in the construction industry has made it essential to develop construction and building materials that are not only affordable, but have minimal negative impact on the environment. This study investigates the valorisation of steel slag, which is mostly considered to be a waste material in several parts of the world, by blending with calcined impure kaolinitic clay to partially replace ordinary Portland cement (OPC) in the preparation of self-compacting concrete (SCC). OPC was substituted with steel slag at a constant level of 10%, whereas calcined clay replaced OPC at varying levels, ranging from 10 to 30% in a ternary blended mix. The hardened properties evaluated include compressive and flexural strengths. Samples containing only calcined clay showed a lower fluidity, which was significantly improved when steel slag was added to the mix. SCC containing 10% steel slag and 20% calcined clay obtained 28 days compressive strength, which was 3.6% higher than the reference cement concrete. An XRD analysis revealed a significant decrease in the peak heights of portlandite in mixtures containing steel slag and calcined clay, regardless of their replacement percentage. Generally, all the blended cement samples performed appreciably in resisting sulphate attack. The results of this study demonstrate that using steel slag and calcined clay together can significantly improve the fresh and hardened properties of SCC without compromising its mechanical properties.

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Section: Sulphate Resistancesupporting

confidence: 89%

Properties of Self-Compacting Concrete (SCC) Prepared with Binary and Ternary Blended Calcined Clay and Steel Slag

Boakye,

Khorami

2024

Infrastructures

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“…Both kaolinitic and non-kaolinitic clays have been used to produce binary blends [40] and ternary blends with limestone [41]. While the pozzolanic reaction, controlled by clay type and calcination, improves the pore structure and transport properties, the reduction in the portlandite content reduces the capacity of the concrete to react with CO2 [42].…”

Section: Introductionmentioning

confidence: 99%

Durability performance of binary and ternary blended cementitious systems with calcined clay: a RILEM TC 282-CCL, review

et al. 2022

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“…Studies have confirmed that it can increase compressive strength [16,17] and reduce permeability [18]. The addition of calcined clay can also reduce the susceptibility of concrete to chloride ingress [18,19] and sulphate attack [20,21]. Calcined clay is also a promising component for reducing an ASR and its effects [22][23][24][25].…”

Section: Introductionmentioning

confidence: 96%

Initial Characteristics of Alkali–Silica Reaction Products in Mortar Containing Low-Purity Calcined Clay

Jóźwiak-Niedźwiedzka,

Jaskulski,

Dziedzic

et al. 2024

Materials

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An alkali–silica reaction (ASR) is a chemical process that leads to the formation of an expansive gel, potentially causing durability issues in concrete structures. This article investigates the properties and behaviour of ASR products in mortar with the addition of low-purity calcined clay as an additional material. This study includes an evaluation of the expansion and microstructural characteristics of the mortar, as well as an analysis of the formation and behaviour of ASR products with different contents of calcined clay. Expansion tests of the mortar beam specimens were conducted according to ASTM C1567, and a detailed microscopic analysis of the reaction products was performed. Additionally, their mechanical properties were determined using nanoindentation. This study reveals that with an increasing calcined clay content, the amount of the crystalline form of the ASR gel decreases, while the nanohardness increases. The Young’s modulus of the amorphous ASR products ranged from 5 to 12 GPa, while the nanohardness ranged from 0.41 to 0.67 GPa. The obtained results contribute to a better understanding of how the incorporation of low-purity calcined clay influences the ASR in mortar, providing valuable insights into developing sustainable and durable building materials for the construction industry.

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

Cited by 31 publications

References 60 publications

Properties of Self-Compacting Concrete (SCC) Prepared with Binary and Ternary Blended Calcined Clay and Steel Slag

Properties of Self-Compacting Concrete (SCC) Prepared with Binary and Ternary Blended Calcined Clay and Steel Slag

Durability performance of binary and ternary blended cementitious systems with calcined clay: a RILEM TC 282-CCL, review

Initial Characteristics of Alkali–Silica Reaction Products in Mortar Containing Low-Purity Calcined Clay

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