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

Dhandapani, Yuvaraj; Joseph, Shiju; Bishnoi, Shashank; Kunther, Wolfgang; Kanavaris, Fragkoulis; Kim, Tae‐Hwan; Irassar, Edgardo F.; Castel, Arnaud; Zunino, Franco; Machner, Alisa; Talakokula, Visalakshi; Thienel, Karl‐Christian; Wilson, William; Elsen, Jan; Martirena, Fernando

doi:10.1617/s11527-022-01974-0

Cited by 20 publications

(8 citation statements)

References 162 publications

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“…Figure 6 shows that the surface resistivity of LC2 and PFA concretes increases with curing duration due to the extended pozzolanic reactions from calcined clay and fly ash. The absolute resistivity values of LC2 concrete are always higher than those of PFA mixes at all ages, confirming the trends found in previous studies on cement paste [ 30,35,36] that were attributed to significant modification of the pore structure [36,37] and pore solution conductivity [30,36].…”

Section: Evolution Of Resistivitysupporting

confidence: 89%

Limestone-Calcined Clay (LC2) as a supplementary cementitious material for concrete

Basavaraj,

Muni,

Dhandapani

et al. 2023

RILEM Tech Lett

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In this work, limestone-calcined clay (LC2) is studied as an alternative supplementary cementitious material (SCM), combining two widely available resources – calcinated kaolinitic clay and limestone, to partially substitute portland clinker. The primary goal is to assess the potential of LC2 to produce moderate to high strength concretes with design compressive strengths of 20 to 50 MPa. For this purpose, 27 mixes with LC2 were prepared with a range of binder contents and water-binder ratios, and the performance was benchmarked against those of mixes having fly ash (PFA). In addition to the quantification of strength and concrete resistivity, life cycle assessment was performed for the concretes considering a typical situation in India. The efficiency of concretes made with LC2, PFA and ordinary portland cement (OPC) was analyzed using the energy intensity index (eics) and apathy index (A-index) as sustainability indicators. This framework establishes the sustainability potential of the LC2 with insights on the influence of strength on the indicators. It is concluded that the LC2 concretes with 45% replacement level, w/b≤0.45 and binder content lower than 400 kg/m3 possess the highest sustainability potential, among the concretes studied here.

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Section: Evolution Of Resistivitysupporting

confidence: 89%

Limestone-Calcined Clay (LC2) as a supplementary cementitious material for concrete

Basavaraj,

Muni,

Dhandapani

et al. 2023

RILEM Tech Lett

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“…This is confirmed by the higher amount of carboaluminate phases formed at higher water to binder ratios [24]. The critical pore entry declined with increasing metakaolinite content [61]. No clear difference [62] or even an increase of the critical pore entry [63] was reported for blended binders with calcined 2:1 illite dominated clays compared to the reference OPC system.…”

Section: Microstructurementioning

confidence: 67%

1:1 or 2:1 ‐ Does it matter for calcined clay as supplementary cementitious material?

Thienel,

Scherb,

Beuntner

et al. 2023

ce papers

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Calcined clays are the most promising future supplementary cementitious material which are capable of replacing fly ashes and blast furnace slag on the long run due to their potential to achieve high cement replacement levels and their global availability. In the last decade most research has focused on calcined clays rich in the 1:1 kaolinite. Clay with less than 20 to 25 % kaolinite were seen as worthless. Even the content of 2:1 phyllosilicates in the kaolinitic clays was neglected and not even mentioned although especially these clays are dominant in areas like central and northern Europe. Here, highly kaolinitic clays are rare or used by other industries leading to high prices. This paper is based on published works and highlights whether information obtained for calcined 1:1 dominated clays can be applied for calcined 2:1 dominated clays or not and where further research is needed.

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“…Durability modeling of calcined clay binders is documented in a few studies only, 110,112 as a recent review of the durability of binary and ternary binders also supported. 114 However, the presented results suggest that the general processes identied. e.g.…”

Section: Modeling the Reaction Of Calcined Clays In Cementitious Bindersmentioning

confidence: 69%

Thermodynamics of calcined clays used in cementitious binders: origin to service life considerations

Hanein¹,

Nguyen²,

Provis³

et al. 2023

J. Mater. Chem. A

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

Abstract: This is a repository copy of Durability performance of binary and ternary blended cementitious systems with calcined clay: a RILEM TC 282 CCL review.

Cited by 20 publications

References 162 publications

Limestone-Calcined Clay (LC2) as a supplementary cementitious material for concrete

Limestone-Calcined Clay (LC2) as a supplementary cementitious material for concrete

1:1 or 2:1 ‐ Does it matter for calcined clay as supplementary cementitious material?

Thermodynamics of calcined clays used in cementitious binders: origin to service life considerations

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