Use of iron and steel industry by-product (GGBS) in cement paste and mortar

Siddique, Rafat; Bennacer, Rachid

doi:10.1016/j.resconrec.2012.09.002

Cited by 174 publications

(69 citation statements)

References 17 publications

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“…The could be attributed to the extremely low or even zero calcium hydroxide (CH) content in the cementitious material matrices of these two mixes, because of the large volume of GGBS used [33]. This is consistent with the results of those of O'Connell et al [32] who also showed slight increase in mass with GGBS concrete exposed to a sulphuric acid solution.…”

Section: Acid Attacksupporting

confidence: 83%

Feasible use of large volumes of GGBS in 100% recycled glass architectural mortar

Ling

Poon

2014

Cement and Concrete Composites

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Section: Acid Attacksupporting

confidence: 83%

Feasible use of large volumes of GGBS in 100% recycled glass architectural mortar

Ling

Poon

2014

Cement and Concrete Composites

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“…Table 1. This effect was also verified by Siddique & Bennacer (2012), where workability of mortar has been increased with the increment in the surface area of GGBS, i.e., finer binder material increased fluidity ratio of mortars. Moreover, due to its slower hydration process, GGBS may be acting as filler in the first minutes of fresh mortars mixes, when the flow property is tested.…”

Section: Methodsmentioning

confidence: 55%

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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“…This delay in GGBS hydration is related to its chemical composition, fineness, glass content, temperature, and to the fact that GGBS has to be activated by alkalis/lime to start to form CSH [2,6]. In this case, the presence of SAP plays an important role in providing water for longer period.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Its ability to slow down cementitious reactions and induce a filler effect leads to a denser CH-laden interfacial zone and formation of finer capillaries, in particular, those in the mesopore range [1,2,6,36]. Fig.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Towards more sustainable construction–application of superabsorbent polymers in cementitious matrices with reduced carbon footprint

Klemm

Almeida

2018

MATEC Web Conf.

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Abstract. Construction industry is constantly searching for sustainable innovations to mitigate negative environmental impacts. Ground granulated blast-furnace slag (GGBS) is a well-known supplementary cementitious material which contributes to reduction of energy and CO 2 emissions from cement industry. However, its use in cementitious systems leads to materials with high cracking susceptibility due to their greater autogenous shrinkage triggered by self-desiccation processes. This problem is even more pronounced when concrete is exposed to severe dry-hot weather conditions, such as in North Africa. In order to mitigate this negative effect of cracking, internal curing agents in the form of Superabsorbent polymers (SAP) can be successfully used. This approach leads to more durable cement based materials and in turn more sustainable constructions.

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Use of iron and steel industry by-product (GGBS) in cement paste and mortar

Cited by 174 publications

References 17 publications

Feasible use of large volumes of GGBS in 100% recycled glass architectural mortar

Feasible use of large volumes of GGBS in 100% recycled glass architectural mortar

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

Towards more sustainable construction–application of superabsorbent polymers in cementitious matrices with reduced carbon footprint

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