Early-age deformation and autogenous cracking risk of slag–limestone filler-cement blended binders

Bouasker, Marwen; Khalifa, Nour El Houda; Mounanga, Pierre; Kahla, Nabil Ben

doi:10.1016/j.conbuildmat.2014.01.037

Cited by 41 publications

(23 citation statements)

References 43 publications

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“…At the end of 28 days, there was shrinkage about 350, 480, 560, 640 µm/m for mortars with 0%, 25%, 50% and 75% of GGBS, respectively. This behavior was also verified by other authors that state the greater values of autogenous shrinkage with GGBS may be due to its higher degree of hydration, and therefore, a greater degree of self-desiccation (Lee et al 2006;Bouasker et al 2014;Jiang et al 2014;Valcuende et al 2015). According to the authors, the greater chemical shrinkage led to faster and greater self-desiccation, and results in larger autogenous shrinkage.…”

Section: Resultssupporting

confidence: 68%

Effect of Superabsorbent Polymers (SAP) on Fresh State Mortars with Ground Granulated Blast-Furnace Slag (GGBS)

Almeida¹,

Klemm²

2016

Proceedings of the 5th International Conference on the Durability of Concrete Structures

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Although cementitious materials are the main construction materials and worldwide produced, there is still a major concern about their sustainability and durability, especially in terms of conserving resources, reducing wastes and decreasing the environmental impacts of repair and replacement. In general, cementitious materials are very susceptible to cracking provoked by autogenous shrinkage due to their associated self-desiccation process. The problem is even more critical in concrete with blended cements, including Portland cement with ground granulated blast-furnace slag (GGBS). The current paper evaluates efficiency of superabsorbent polymers (SAP) as internal curing agents; shrinkage reduction in mortars with different levels of cement replacement by GGBS (0%, 25%, 50% and 75%) is presented. The study is focused on three types of SAPs with different water absorption/desorption capacities (SAP I: 10 g/g, SAP II: 25-30 g/g and SAP III: 35 g/g in cement paste solution). Tests of consistency, density, air content of fresh mortar, setting times and autogenous shrinkage are analysed. The results showed that mortars with SAP can significantly reduce autogenous shrinkage for any studied GGBS content in comparison with the reference mortar. The reduction of autogenous shrinkage by SAP may decrease the cracking susceptibility and hence increase the sustainability level of the material for more durable constructions.

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Section: Resultssupporting

confidence: 68%

Effect of Superabsorbent Polymers (SAP) on Fresh State Mortars with Ground Granulated Blast-Furnace Slag (GGBS)

Almeida¹,

Klemm²

2016

Proceedings of the 5th International Conference on the Durability of Concrete Structures

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“…The mechanisms of hydration are the same: the hydrate chemistry generated is identical and only the kinetics seems to be improved [41]. At a long-term, the strength of concrete cured at low temperature is much higher than those cured at a higher temperature without that, their hydration is higher [42][43][44]. This is due to a development of microstructure coarses, the hydrates (especially C-S-H) being more denser at a high temperature and distributed in a more heterogeneous manner, and allow the development of a larger porous network, causing the loss of strength [45].…”

Section: The Effect Of Mechanical Chemical and Thermal Activation Onmentioning

confidence: 94%

Effect of quaternary cementitious systems containing limestone, blast furnace slag and natural pozzolan on mechanical behavior of limestone mortars

Makhloufi

Chettih

Bédérina

et al. 2015

Construction and Building Materials

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“…In addition, it was observed that the partial replacement of Portland cement (PC) with limestone filler caused a decrease in early-age reaction heat and chemical shrinkage, due to the lower reactivity of SCM. The increase in the dosage of limestone filler from 10% to 20% resulted in delaying the appearance of the first crack in the ternary binders with limestone (Bouasker et al 2014). It is reported by another study that the replacing cement with limestone would improve the dimensional stability by reducing the heat generation and drying shrinkage (McKinley et al 2013).…”

Section: Literature Reviewmentioning

confidence: 97%

Decision-making on Increasing Limestone Content of General Purpose Cement

Mohammadi

South

2015

ACT

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Journal of Advanced AbstractFollowing the publication of the Australian Standard AS 3972, "General purpose and blended (GP) cements" in 2010, a research programme was undertaken to determine the effect, if any, of increasing the maximum permissible mineral addition in Type GP cement. This paper involves the assessment of the variation in standard laboratory concrete properties due to increasing the limestone addition in cement. Workability, bleed water, compressive strength and drying shrinkage of concrete samples with different limestone contents in the range of 5% to 12% were examined. Based on the research results, it is recommended that the maximum allowable mineral addition in Type GP cement be increased from 7.5% to 12%.

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Early-age deformation and autogenous cracking risk of slag–limestone filler-cement blended binders

Cited by 41 publications

References 43 publications

Effect of Superabsorbent Polymers (SAP) on Fresh State Mortars with Ground Granulated Blast-Furnace Slag (GGBS)

Effect of Superabsorbent Polymers (SAP) on Fresh State Mortars with Ground Granulated Blast-Furnace Slag (GGBS)

Effect of quaternary cementitious systems containing limestone, blast furnace slag and natural pozzolan on mechanical behavior of limestone mortars

Decision-making on Increasing Limestone Content of General Purpose Cement

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