The effect of superplasticizers on the mechanical performance of concrete made with fine recycled concrete aggregates
By P. Pereira, L. Evangelista, Jorge de Brito. 2012
261 citations recorded by the source corpus.
Abstract It is considered that using crushed recycled concrete as aggregate for concrete production is a viable alternative to dumping and would help to conserve abiotic resources. This use has fundamentally been based on the coarse fraction because the fine fraction is likely to degrade the performance of the resulting concrete. This paper presents results from a research work undertaken at Instituto Superior Tecnico (IST), Lisbon, Portugal, in which the effects of incorporating two types of superplasticizer on the mechanical performance of concrete containing fine recycled aggregate were evaluated. The purpose was to see if the addition of superplasticizer would offset the detrimental effects associated with the use of fine recycled concrete aggregate. The experimental programme is described and the results of tests for splitting tensile strength, modulus of elasticity and abrasion resistance are presented. The relative performance of concrete made with recycled aggregate was found to decrease. However, the same concrete with admixtures in general exhibited a better mechanical performance than the reference mixes without admixtures or with a less active superplasticizer. Therefore, it is argued that the mechanical performance of concrete made with fine recycled concrete aggregates can be as good as that of conventional concrete, if superplasticizers are used to reduce the water–cement ratio of the former concrete.
Subfields: Building and Construction, Civil and Structural Engineering
View Paper: https://www.semanticscholar.org/paper/36034321c4e5178885da7bdb1da52fa4217b1488
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In Building and Construction
In Civil and Structural Engineering
Citations in the corpus
- Physical, chemical and mineralogical properties of fine recycled aggregates made from concrete waste (2015, unknown): “The normalized results are similar to recent results from other authors [67,55].”
- Concrete with fine recycled aggregates: a review (2014, methodology): “Notwithstanding the limitations imposed, more recent scientific works (Evangelista and de Brito, 2007, 2010; Khatib, 2005; Leite, 2001; Pereira et al., 2012a, 2012b; Solyman, 2005) have shown that it is feasible to use FRA in structural concrete and maintain its characteristics within acceptable…”
- Predicting strength of recycled aggregate concrete using Artificial Neural Network, Adaptive Neuro-Fuzzy Inference System and Multiple Linear Regression (2016, methodology): “In the present study, a total of 257 data sets was collected from fresh experiments performed by authors (Ajdukiewicz and Kliszczewicz, 2002; Tu et al., 2006; Ryu, 2002; Deshpande et al., 2014; Hansen and Narud, 1983; Rao et al., 2011; Yong et al., 2009; Akbari et al., 2011; Katz, 2003; Padmini et a”
- Tensile strength behaviour of recycled aggregate concrete (2015, background): “This was observed in all publications studied [26-66].”