Experimental Investigation of Self Healing Behavior of Concrete using Silica Fume and GGBFS as Mineral Admixtures

Depaa, R. A. B; Kala, T. Felix

doi:10.17485/ijst/2015/v8i36/87644

Cited by 11 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, the findings also discovered that the existence of silica fume gave the highest bond strength regardless of capsule surface modification. It is noted that the presence of pozzolan increased the formation of CSH gel [54,55], which densifies the cement microstructure and consequently improved the interfacial zone between capsule's shell and mortar-cement matrix. The adhesion between capsule and cement matrix needs to be strong to allow the breakage of the capsule during concrete cracking [42].…”

Section: Capsule's Bonding Strengthmentioning

confidence: 99%

Evaluation of the Compatibility of Modified Encapsulated Sodium Silicate for Self-Healing of Cementitious Composites

et al. 2021

View full text Add to dashboard Cite

Healing agent carriers play a significant role in defining the performance of the autonomous self-healing system. Particularly, the ability to survive during the mixing process and the release of the healing agent when cracks occur without affecting the mechanical properties of the cementitious composite. Up to now, these issues are still a concern since glass capsules are unable to survive the mixing process, while some types of microcapsules were reported to cause a decrement in strength as well as limited strength recovery. Therefore, this study was twofold, addressing the surface treatment of polystyrene (PS) capsules and the evaluation of the compatibility of the modified capsules for cement-based applications. Secondly, assessing the healing performance of modified PS capsules in cementitious composites. Furthermore, the study also evaluates the potential healing performance due to the synergic effect between the encapsulation method and the autogenous self-healing mechanism. The investigation was carried out by measuring the changes in the pH of pore solution, FTIR analysis, survival ratio, and bonding strength. For self-healing assessment, the compression cracks on the cement paste were created at an early age and the strength recovery was measured at the age of 28 and 56 days. To identify the chemical compounds responsible for the healing process, SEM-EDX tests were conducted. Moreover, the effect of silica fume (SF) on bonding strength and self-healing was also evaluated. Based on the results, the modified PS capsules by roughing approach showed promising performance in terms of survivability, bonding, and recovery. The modified PS capsule increased the strength recovery by about 12.5–15% for 100%OPC and 95%OPC + 5%SF, respectively. The finding observed that the combining of modified PS capsules and the inclusion of SF gave high strength recovery of about 20% compared to 100%OPC without capsules. Thus, the modified PS capsule has a good potential for self-healing of cementitious-based applications.

show abstract

Section: Capsule's Bonding Strengthmentioning

confidence: 99%

Evaluation of the Compatibility of Modified Encapsulated Sodium Silicate for Self-Healing of Cementitious Composites

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Las propiedades de endurecimiento optimas se determinan con un 5% de CCA y 5% de CV en reemplazo del cemento (Bheel, et al, 2020). Otro tipo de diseño en relación a altas temperaturas es fabricar un prototipo de concreto laterizado, que viene a ser un concreto con agregados de laterita rico en hierro, y alúmina a menudo utilizado en protecciones el comportamiento autocurativo del concreto; induciendo a la mezcla del primer aditivo entre un 2.5 a 12.5%, y como masa reemplazante al cemento el segundo entre 35 y 55%; demostrando que mientras menor sean las partículas de la composición existirán mayor cantidad de partículas no hidratadas que cuando entren en contacto con la humedad atmosférica la reacción de los aditivos formaran hidróxido de calcio que por medio de las aberturas lograran el efecto de autocuración (Depaa et al, 2015).…”

Section: Influencia Del Aditivo En Estado Endurecidounclassified

El Uso del aditivo mineral como modificador de las propiedades mecánicas en el concreto: una revisión

et al. 2021

View full text Add to dashboard Cite

El presente artículo recopila e identifica la adición de ciertos aditivos minerales de uso más frecuente en la industria de la construcción como modificadores del concreto durante su estado fresco y endurecido, los cuales en su mayoría son usados como remplazo parcial del cemento. Actualmente los investigadores buscan optimizar las propiedades del diseño de mezclas dependiendo al uso por el cual son concebidas, así mismo que sea factible económicamente y respetuoso con el medio ambiente. Se revisaron 50 artículos indexados entre los años 2010 y 2021 distribuidos en las siguientes bases de datos: 37 artículos de Scopus, 10 artículos de ScienceDirect, 2 artículos de Springer y 1 artículo de SciELO. Los aditivos en estudio son escoria de alto horno granulada (EAHG), cenizas volantes (CV), humo de sílice (HS), ceniza de cascarilla de arroz (CCA). En su mayoría presentan una mejora considerable en sus características mecánicas de tracción, resistencia a la compresión y módulo de elasticidad. La adición de CV mejora en la mezcla del diseño durante su estado fresco, la CCA durante su estado endurecido y las mejores resistencias para el HS; sin embargo, la EAHG resulta cumplir con casi todas las expectativas en mayor porcentaje y así mismo junto con la CCA, son potencialmente competitivos.

show abstract

“…The authors also found that bacteria which are not reported as calcite precipitating, Bacillus flexus, exhibited maximum compressive strength. In this research study [19] cement-based concrete with added GGBFS (ground granulated blast furnace slag) and silica fume was tested for compressive strength at 28 days. It was found that the concrete mixture containing 35% of GGBFS had a compressive strength value of 56 N/mm 2 .…”

Section: Influence Of Bacteria On Concrete Propertiesmentioning

confidence: 99%

Bacterial Concrete as a Sustainable Building Material?

Stanaszek-Tomal

2020

Sustainability

View full text Add to dashboard Cite

The right selection of building materials plays an important role when designing a building to fall within the definition of sustainable development. One of the most commonly used construction materials is concrete. Its production causes a high energy burden on the environment. Concrete is susceptible to external factors. As a result, cracks occur in the material. Achieving its durability along with the assumptions of sustainable construction means there is a need to use an environmentally friendly and effective technique of alternative crack removal in the damaged material. Bacterial self-healing concrete reduces costs in terms of detection of damage and maintenance of concrete structures, thus ensuring a safe lifetime of the structure. Bacterial concrete can improve its durability. However, it is not currently used on an industrial scale. The high cost of the substrates used means that they are not used on an industrial scale. Many research units try to reduce production costs through various methods; however, bacterial concrete can be an effective response to sustainability.

show abstract

Experimental Investigation of Self Healing Behavior of Concrete using Silica Fume and GGBFS as Mineral Admixtures

Cited by 11 publications

References 0 publications

Evaluation of the Compatibility of Modified Encapsulated Sodium Silicate for Self-Healing of Cementitious Composites

Evaluation of the Compatibility of Modified Encapsulated Sodium Silicate for Self-Healing of Cementitious Composites

El Uso del aditivo mineral como modificador de las propiedades mecánicas en el concreto: una revisión

Bacterial Concrete as a Sustainable Building Material?

Contact Info

Product

Resources

About