Performance evaluation of pervious concrete pavements with recycled concrete aggregate

Strieder, Helena Lunkes; Dutra, Vanessa Fátima Pasa; Graeff, Ângela Gaio; Núñez, Washington Peres; Merten, Felipe Raul Meert

doi:10.1016/j.conbuildmat.2021.125384

Cited by 40 publications

(19 citation statements)

References 38 publications

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“…Due to the quicker geopolymerization reaction between the sources and alkaline solutions, specimens activated by the combination of NaOH and Na 2 SiO 3 had the maximum compressive strength. When compared with the conventional pervious concrete (with large voids and poor bond strength of the mortars) [ 27 ], the compressive strength of GRPC improved significantly.…”

Section: Resultsmentioning

confidence: 99%

Influence of Alkali-Activators on Acid Rain Resistance of Geopolymer-Recycled Pervious Concrete with Optimal Pore Size

Yang

Duan

et al. 2022

Materials

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Geopolymer-recycled pervious concrete (GRPC) is a novel concrete that can effectively inhibit the corrosion of acid rain and alleviate urban waterlog. The goal of this study is to ascertain the optimal pore size of GRPC and study its acid rain resistance activated by different alkali-activators. Three different sizes (0.8, 1.0, and 1.2 mm) were separately chosen as the pore diameters of GRPC. The alkali-activator solution adopted sodium hydroxide (NaOH), sodium silicate (Na2SiO3), and a mixture of the two. The mechanical properties and permeability coefficient were tested to determine the optimal pore size of GRPC. After that, specimens with the optimal pore size were immersed in a simulative acid rain solution (sulfuric acid solution with pH = 4.0) for 6 d and were dried 1 d until 56 d. The effects of different alkali activators on acid rain resistance of GRPC were analyzed by compressive strength, neutralization depth, and mass loss. The results manifested that the mechanical properties of GRPC were excellent, the compressive strength of GRPCH+N reached more than 60.1 MPa, and their splitting tensile strength attained more than 5.9 MPa, meeting the strength requirement of the road for heavy traffic load. Considering the mechanical properties and the acid rain purification effect of alkaline GRPC required a relatively small permeability coefficient; the optimal pore size was 1 mm. When specimens with optimal pore size were exposed to acid solution, the corrosion products (gypsums) would block the pores of GRPC to inhibit further corrosion, keeping the stability of the compressive strength. GRPC activated by the mixture of NaOH and Na2SiO3 generated a more stable amorphous three-dimensional network structure, endowing GRPCH+N with better mechanical properties and acid corrosion resistance.

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Section: Resultsmentioning

confidence: 99%

Influence of Alkali-Activators on Acid Rain Resistance of Geopolymer-Recycled Pervious Concrete with Optimal Pore Size

Yang

Duan

et al. 2022

Materials

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“…While abrasion resistance of pervious mixes containing RCA was improved for every replacement ratio, for RCB abrasion resistance it increased up to 20% replacement. It was also mentioned by Strieder et al 22 that the replacement level of recycled aggregates does not have a significant effect on tensile and flexural strength. Malaiskiene et al 23 investigated the effect of coarse aggregate content in pervious concrete and to reach that aim used two different fractions of coarse aggregates, namely 4-16 mm and 4-8 mm.…”

Section: Introductionmentioning

confidence: 82%

Experimental study of aggregate size and gradation on pervious concretes' mechanic, hydraulic, and surface properties

Yavuz

Yazıcı

2023

Structural Concrete

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As environmental impacts of materials in concrete construction have been an aspect that has been focused on lately, pervious concrete has been implemented widely around the world. Recently, as a reflection of this trend, research and application of pervious concrete have been multiplied. Pervious mixes are mostly being used on low traffic load environments such as pavements, parking lots, and greenhouses. Because of this inclination 10 ± 1.5 MPa is chosen in this study for target compressive strength. The aim of this study is to investigate the effect of aggregate type and gradation on pervious concrete properties with target compressive strength of 10 ± 1.5 MPa. Three different coarse aggregate types (limestone, river, and recycled) and three different fractions (15–25, 10–15, and 5–15 mm) were considered. Recycled coarse aggregates were obtained from the previous mixes with limestone coarse aggregates produced for this study. Mechanical properties such as compressive strength, splitting tensile and flexural strength, density, void content, abrasion strength, and drying shrinkage were determined. Results showed that it is possible to have similar compressive strength and higher void content for the pervious mixes produced with coarse recycled aggregates. While river coarse aggregates showed better quality for drying shrinkage, coarse limestone aggregates were more abrasion resistant.

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“…O consumo de materiais utilizado na pesquisa está representado na Tabela 2. O procedimento de mistura foi estabelecido baseando-se em estudos técnicos [10], dado que não há normalizações sobre a tecnologia de produção de concretos permeáveis em âmbito laboratorial. Inicialmente toda a fração de agregado graúdo e parte da água foram lançados na betoneira, misturando por cerca de 1 minuto até umedecer a superfície dos agregados.…”

Section: Materiais E Métodosunclassified

Influência da técnica de capeamento na resistência à compressão do concreto permeável

Castro

Araújo

Carasek³

2022

Xix Encontro Nacional De Tecnologia Do Ambiente Construído

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O concreto permeável tem se destacado como solução urbanística e sustentável nos últimos anos. Apesar dos avanços, o conhecimento sobre os métodos de produção, aplicação e controle tecnológico ainda é incipiente. Esta pesquisa contribui para o estudo sobre a influência da técnica de capeamento dos corpos de prova para o ensaio de resistência à compressão desse concreto. Os métodos de capeamento adotados foram: gesso, enxofre, argamassa e Neoprene, com corpos de prova cilíndricos de 100 x 200 mm. A análise estatística apontou resultados com significativa variabilidade dentre os diferentes materiais estudados. Considerando os aspectos técnicos e ambientais recomenda-se o uso de argamassa para o capeamento dos CPs de concreto permeável.

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Performance evaluation of pervious concrete pavements with recycled concrete aggregate

Cited by 40 publications

References 38 publications

Influence of Alkali-Activators on Acid Rain Resistance of Geopolymer-Recycled Pervious Concrete with Optimal Pore Size

Influence of Alkali-Activators on Acid Rain Resistance of Geopolymer-Recycled Pervious Concrete with Optimal Pore Size

Experimental study of aggregate size and gradation on pervious concretes' mechanic, hydraulic, and surface properties

Influência da técnica de capeamento na resistência à compressão do concreto permeável

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