Rheological behaviour of concrete made with fine recycled concrete aggregates – Influence of the superplasticizer

Cartuxo, Francisco; Brito, Jorge de; Evangelista, Luís; Jiménez, José Ramón; Ledesma, Enrique

doi:10.1016/j.conbuildmat.2015.03.119

Cited by 172 publications

(70 citation statements)

References 38 publications

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“…Cartuxo et al [38] tested the creep behaviour of concrete made with 100% fine RCA and superplasticizers with different water reducing capacity. The results showed that all RAC mixes exhibited significantly greater creep strains (60-150% greater than that observed in control NAC mixes).…”

Section: Recycled Aggregate Sizementioning

confidence: 99%

“…An experimental investigation performed by Cartuxo et al [38] evaluated the creep behaviour of concrete mixes produced with fine RCA and with different water-reducing-power superplasticizers. Apart from the control NAC and RAC mixes without any admixtures, with w/c ratios of 0.51 and 0.55, respectively, two other mixes were evaluated.…”

Section: Effect Of Water Reducing Admixturesmentioning

confidence: 99%

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Comparative analysis of existing prediction models on the creep behaviour of recycled aggregate concrete

Silva

Dhir

2015

Engineering Structures

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Section: Recycled Aggregate Sizementioning

confidence: 99%

Section: Effect Of Water Reducing Admixturesmentioning

confidence: 99%

Comparative analysis of existing prediction models on the creep behaviour of recycled aggregate concrete

Silva

Dhir

2015

Engineering Structures

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“…It is found that the decrease of the cement paste elastic response has been reflected obviously by the decrease of η′. Since the solid structure of a material can be preserved under small‐strain test conditions, dynamic rheology testing is frequently used to evaluate the morphological structure of polymer blends or pastes . OPC has the highest viscosity at 0.05% strain at 3661 Pa s, which is about 11 times the viscosity of cement/DPC0 paste.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of a PAMAM dendrimer‐based superplasticizer and its effect on the properties in cementitious system

Zhao

Liao

Nian

et al. 2018

J of Applied Polymer Sci

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In this work, a polyamidoamine dendrimer-based polycarboxylic superplasticizer (DPC) with a crosslinked emanative structure was synthesized via simple free radical polymerization. 1 H-nuclear magnetic resonance and Fourier transform infrared spectroscopy measurements were used for structural characterization. The fluidity, rheology behavior, and compressive strength of the cement/DPC samples were investigated in detail. The DPCs performed better dispersion and dispersion maintaining capabilities, stronger water reduction capability, and higher adsorption amounts than the conventional comb-shaped superplasticizer. The dispersive capacity of the DPC increased with an increasing generation of polyamidoamine dendrimers. Besides, compared with conventional comb-shaped superplasticizer, the addition of DPC led to a delayed and lowered heat flow peak on the hydration of cement paste at early age of hydration process. Furthermore, compressive strength results showed that the cement/DPC samples performed higher compressive strength than blank cement samples.

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“…The molecular weight also has certain influence on early‐strength property, it was demonstrated that PCEs with higher molecular weight had stronger retardation effect in hydration of cement . In addition, introducing some functional groups into the PCE molecular structure was also confirmed that had acceleration effect on cement hydration . Early‐strength PCEs can markedly broaden applied range of PCEs; under this circumstance, it becomes an important research aspect to develop novel PCEs with properties of high dispersion ability and accelerating early‐strength growth of concrete .…”

Section: Introductionmentioning

confidence: 92%

Synthesis and characterization of a novel early‐strength polycarboxylate superplasticizer and its performances in cementitious system

Xia

Zhou

Ni³

et al. 2020

J of Applied Polymer Sci

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A novel early-strength type polycarboxylate superplasticizer (PCE) was synthesized by a new design of molecule structure such as introducing long polyoxyethlene side chains, functional monomer (2-acrylamide-2-methylpropanesulfonic acid), and optimizing monomer composition. In this study, with introducing the sulfonate groups into PCE structure, its dispersion capacity and the absorbed amount are increased firstly and then decreased, but the retardation hydration effect is weakened gradually. The molecular weight, adsorbed amount, and dispersion capacity of PCEs firstly increased and then decreased with increasing the AA/TPEG monomer molar ratio, and the same trend as the compressive strength harden concrete with PCEs at the age of 1, 3, and 28 days. The early-strength type PCE exhibits good dispersive capacity and weak retardation hydration effect in cementitious system, and the early age strength of concrete with addition of early-strength type PCE develops quickly. This study indicates that reasonable design of PCE molecule structure and synthesis method can obtain a novel early-strength type PCE which makes a good balance between workability and fast development of early age strength in cementitious system.

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Rheological behaviour of concrete made with fine recycled concrete aggregates – Influence of the superplasticizer

Cited by 172 publications

References 38 publications

Comparative analysis of existing prediction models on the creep behaviour of recycled aggregate concrete

Comparative analysis of existing prediction models on the creep behaviour of recycled aggregate concrete

Synthesis and characterization of a PAMAM dendrimer‐based superplasticizer and its effect on the properties in cementitious system

Synthesis and characterization of a novel early‐strength polycarboxylate superplasticizer and its performances in cementitious system

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