Investigation on composite polymer and silica fume rubber aggregate pervious concrete

Toghroli, Ali; Shariati, Mahdi; Rehan, Mohamed; Ibrahim, Zainah

doi:10.15224/978-1-63248-132-0-56

Cited by 35 publications

(5 citation statements)

References 18 publications

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“…Embora muitos desses estudos relatem um bom desempenho técnico do concreto permeável, no que se diz respeito à resistência à compressão, flexão e permeabilidade, suas propriedades físico-mecânicas variam consideravelmente em função do tipo de resíduo aplicado (TOGHROLI et al, 2017). O RBRO é um resíduo produzido em larga escala no Brasil e pouco se conhece acerca de concretos permeáveis produzidos com esse material.…”

Section: Figura 1 -Comparação Entre Paver Comum E Paver Permeávelunclassified

Avaliação das propriedades mecânicas e de permeabilidade de peças de concreto permeável contendo resíduos de rocha ornamental

Simões,

Zanotelli,

Pilar

et al. 2023

Ambient. constr.

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Resumo São geradas, anualmente no Brasil, grandes quantidades de resíduos de beneficiamento de rochas ornamentais (RBRO), em sua maioria destinados a aterros sanitários, formando um preocupante passivo ambiental. A fim de contribuir com soluções que minimizem o seu descarte e ainda agregar valor técnico a esse material, é proposto o uso desse resíduo para produção de pavimentos permeáveis. Para tanto, foram produzidos concretos permeáveis no formato de blocos intertravados (pavers), contendo teores de 0, 5, 10 e 15% de RBRO em substituição (em volume) ao cimento Portland. Ensaios de permeabilidade, porosidade e resistência mecânica foram conduzidos, de acordo com a NBR 16416:2015. Para os resultados de resistência mecânica, as peças com substituição de 5% e 10% alcançaram a resistência característica (fpk) mínima, enquanto o paver com 15% de substituição de cimento por RBRO não obteve um resultado satisfatório. Os resultados de porosidade e permeabilidade foram satisfatórios, com resultados acima de 16,6% e 5.000 milímetros por hora, respectivamente, para todas as misturas testadas.

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Section: Figura 1 -Comparação Entre Paver Comum E Paver Permeávelunclassified

Avaliação das propriedades mecânicas e de permeabilidade de peças de concreto permeável contendo resíduos de rocha ornamental

Simões,

Zanotelli,

Pilar

et al. 2023

Ambient. constr.

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“…Shariati et al [22] showed that concrete permeability could be improved by making waste tires into aggregates. Toghroli et al [23] found that the coupling of composite polymer, silica fume, and rubber aggregate could improve the mechanical properties and water permeability of concrete.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Polypropylene Fiber Recycled Brick Aggregate Concrete and Its Influencing Factors by Gray Correlation Analysis

Gong¹,

Bai²,

Tan

et al. 2023

Sustainability

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Making construction waste into raw materials for recycled concrete is beneficial for resource conservation and environmental protection. This paper investigated the effects of different recycled brick aggregate (RBA) replacement rates (30%, 50%, 70%, and 100%) and different contents of polypropylene fibers (PPFs) (0.08%, 0.10%, 0.12%, 0.16%, and 0.2%) on the mechanical properties of recycled brick concrete. Gray correlation was also used to analyze the degree of effect factors on the mechanical properties of concrete. The results showed that the mechanical properties decreased when the natural coarse aggregate (NCA) was replaced with RBA, while PPFs could better improve the mechanical properties of RBA concrete. The improvement of compressive and flexural properties was optimal when the PPF content was 0.12%; the improvement of tensile properties was optimal when the PPF content was 0.2%. In addition, PPFs significantly improved the toughness of RBA concrete. The gray correlation degrees between compressive strength (tensile strength, flexural strength) and NCA, RBA, and PPFs were 0.8964 (0.8691, 0.8935), 0.7301 (0.6530, 0.7074), and 0.5873 (0.5870, 0.5840), respectively.

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“…As water is used and removed from the small holes in the hydrated cement network in HPC mixes, large inward Laplace pressures occur [ 34 ]. These pressures are significant enough to generate autogenous shrinkage, a bulk volumetric collapsing of the system that can result in early age cracks and failure of the structure, particularly if the concrete is restricted against reinforcements, forms, or even other concrete [ 17 , 39 , 78 , 79 , 80 , 81 , 82 , 83 ]. Extra water can be given externally during the curing stage to prevent self-desiccation and counterbalance part of this early age shrinkage through the use of wet blankets, hoses, or sprinklers.…”

Section: Introductionmentioning

confidence: 99%

Application of Polyacrylic Hydrogel in Durability and Reduction of Environmental Impacts of Concrete through ANN

Peng

Zandi

et al. 2022

Gels

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While adding superabsorbent polymer hydrogel particles to fresh concrete admixtures, they act as internal curing agents that absorb and then release large amounts of water and reduce self-desiccation and volumetric shrinkage of cement that finally result in hardened concrete with increased durability and strength. The entrainment of microscopic air bubbles in the concrete paste can substantially improve the resistance of concrete. When the volume and distribution of entrained air are adequately managed, the microstructure is protected from the pressure produced by freezing water. This study addresses the design and application of hydrogel nanoparticles as internal curing agents in concrete, as well as new findings on crucial hydrogel–ion interactions. When mixed into concrete, hydrogel particles produce their stored water to power the curing reaction, resulting in less volumetric shrinkage and cracking and thereby prolonging the service life of concrete. The mechanical and swelling performance qualities of the hydrogel are very sensitive to multivalent cations found naturally in concrete mixes, such as aluminum and calcium. The interactions between hydrogel nanoparticles and alkaline cementitious mixes are described in this study, while emphasizing how the chemical structure and shape of the hydrogel particles regulate swelling behavior and internal curing efficiency to eliminate voids in the admixture. Moreover, in this study, an artificial neural network (ANN) was utilized to precisely and quickly analyze the test results of the compressive strength and durability of concrete. The addition of multivalent cations reduced swelling capacity and changed swelling kinetics, resulting in fast deswelling behavior and the creation of a mechanically stiff shell in certain hydrogel compositions. Notably, when hydrogel particles were added to a mixture, they reduced shrinkage while encouraged the creation of particular inorganic phases within the void area formerly held by the swelled particle.

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Investigation on composite polymer and silica fume rubber aggregate pervious concrete

Cited by 35 publications

References 18 publications

Avaliação das propriedades mecânicas e de permeabilidade de peças de concreto permeável contendo resíduos de rocha ornamental

Avaliação das propriedades mecânicas e de permeabilidade de peças de concreto permeável contendo resíduos de rocha ornamental

Mechanical Properties of Polypropylene Fiber Recycled Brick Aggregate Concrete and Its Influencing Factors by Gray Correlation Analysis

Application of Polyacrylic Hydrogel in Durability and Reduction of Environmental Impacts of Concrete through ANN

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