The Rheology of a Cement Paste and the Frost Resistance of a Permeable Concrete With an Emulsified Asphalt Modified by a Silane Coupling Agent

Yan, Zhen

doi:10.13168/cs.2020.0001

Cited by 2 publications

(1 citation statement)

References 27 publications

(22 reference statements)

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“…The findings reported by Wang et al [ 37 ] support the observed increase in the viscosity of cement pastes when incorporating graphene oxide and increasing silane concentration in the mixtures. Additionally, Yan et al [ 38 ] reported an increase in the maximum shear stress with increasing silane addition up to a dosage limit of 2%. This indicates that the presence of silane facilitates the better engagement of the cementitious paste on the surface of the aggregates, resulting in a more compact structure.…”

Section: Resultsmentioning

confidence: 99%

Assessment of Wood Bio-Concrete Properties Modified with Silane–Siloxane

de Aguiar,

da Silva,

Gomes

et al. 2023

Materials

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Bio-based materials, such as wood bio-concrete (WBC), hold promise in reducing energy consumption and carbon footprint of the construction industry. However, the durability of these materials is not well understood and can be negatively affected by the high water absorption capacity of wood bio-aggregates. In the field of cement composites, for example, silane–siloxane-based water repellent has been used to protect such materials from natural environmental attack. Nevertheless, there is still a limited understanding of various aspects related to this type of treatment, including its performance when applied to the bio-concrete substrate. This research aimed to investigate the influence of silane–siloxane on the rheology and hydration of cementitious paste through isothermal calorimetry and thermogravimetric analysis. Additionally, the impact of silane–siloxane on the physical and mechanical properties of WBCs was examined by conducting tests at fresh state (flow table and entrained air content) and hardened state (compressive strength and capillary water absorption). The composites were produced with a volumetric fraction of 45% of wood shavings while the cement matrix consisted of a combination of cement, rice husk ash, and fly ash. Silane–siloxane was applied in three ways: as coating, incorporated as an admixture, and in a combination of both methods. The results indicated that by incorporating silane in the cementitious pastethe viscosity increased by 40% and the hydration was delayed by approximately 6 h when compared to the reference. In addition, silane improved the compressive strength of WBCs by 24% when incorporated into the mixture, expressively reduced the water sorptivity of WBCs (93%), and was more effective if used as coating.

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Section: Resultsmentioning

confidence: 99%

Assessment of Wood Bio-Concrete Properties Modified with Silane–Siloxane

de Aguiar,

da Silva,

Gomes

et al. 2023

Materials

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Metodologías empleadas para la producción de concreto permeable usando parcialmente materiales reciclados como agregados: una revisión literaria

Ayala-López

Gil-Ahumada

Cornejo-Ramos

et al. 2022

TecnoL.

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El objetivo de la presente revisión fue recopilar y discutir literatura científica sobre metodologías empleadas para la producción y elaboración del concreto innovador “concreto permeable”, como alternativa de diseño en pavimentos, con el remplazo parcial de agregado grueso por agregados reciclados, como látex de caucho al 5 % y 8 % por peso de cemento, ceniza volante entre el 0 % y el 70 % por volumen del cemento, y fibra de carbono al 0.27 % y 0.4 % por peso de agregado grueso. Esta revisión de literatura implicó seleccionar las publicaciones más relevantes, para los períodos del 2015 al 2021 en bases de datos indexadas Scopus, Scielo, ScienceDirect, y Latindex; enfocándose en múltiples parámetros como: “materiales residuales, coeficiente de permeabilidad, concreto permeable, grado de porosidad y ensayos de laboratorio para el concreto permeable”. Los resultados muestran que la resistencia a la compresión varía entre 0.5 MPa y 97.3 MPa, resistencia a la tracción entre 1.6 MPa y 5.29 MPa y la permeabilidad entre 4.63 mm/s y 10.2 mm/s, donde el porcentaje idóneo del uso de ceniza volante para la obtención óptima de concreto permeable es hasta el 20 %, que, excediendo este porcentaje, afecta negativamente sus propiedades mecánicas. En conclusión, el “concreto permeable” se sitúa dentro de los rangos establecidos según normativa: 17.5 MPa, 2.6 MPa, 6.1 mm/s, respectivamente; por ende, adquiere un valor sustancial, contribuyendo con la mejora del nivel microestructural y mayor durabilidad, siendo ventajoso y útil en los tiempos modernos.

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The Rheology of a Cement Paste and the Frost Resistance of a Permeable Concrete With an Emulsified Asphalt Modified by a Silane Coupling Agent

Cited by 2 publications

References 27 publications

Assessment of Wood Bio-Concrete Properties Modified with Silane–Siloxane

Assessment of Wood Bio-Concrete Properties Modified with Silane–Siloxane

Metodologías empleadas para la producción de concreto permeable usando parcialmente materiales reciclados como agregados: una revisión literaria

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