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Influence of nano silica on durability properties of concrete

Influence of nano silica on durability properties of concrete This study focuses on determining water permeability, water absorption, chloride permeability, and compressive strength of nano-silica added concrete. Nano-silica was utilized as a cement replacement material (0–3 wt %) to design and cast two different grade concrete mixes. The microstructure development of concrete was studied using scanning electron microscope images and energy-dispersive X-ray spectroscopy. The results specify that adding 3% nano-silica to concrete enhances its microstructure by creating a denser calcium silicate hydrate gel and lowering calcium hydroxide crystals. After 56 days, the compressive strength of concrete mixes (M 30 and M 40 grade) containing 3% nano-silica was 13.14% and 16.92% greater than the control mix (0% nano-silica). Compressive strength is reasonably high in nano-silica added concrete mixes, but they have low water absorption, water, and chloride permeability. Thus, nano-silica can develop concretes with lower water absorption, water permeability, and chloride permeability. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Innovative Infrastructure Solutions Springer Journals

Influence of nano silica on durability properties of concrete

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Publisher
Springer Journals
Copyright
Copyright © Springer Nature Switzerland AG 2022
ISSN
2364-4176
eISSN
2364-4184
DOI
10.1007/s41062-022-00777-0
Publisher site
See Article on Publisher Site

Abstract

This study focuses on determining water permeability, water absorption, chloride permeability, and compressive strength of nano-silica added concrete. Nano-silica was utilized as a cement replacement material (0–3 wt %) to design and cast two different grade concrete mixes. The microstructure development of concrete was studied using scanning electron microscope images and energy-dispersive X-ray spectroscopy. The results specify that adding 3% nano-silica to concrete enhances its microstructure by creating a denser calcium silicate hydrate gel and lowering calcium hydroxide crystals. After 56 days, the compressive strength of concrete mixes (M 30 and M 40 grade) containing 3% nano-silica was 13.14% and 16.92% greater than the control mix (0% nano-silica). Compressive strength is reasonably high in nano-silica added concrete mixes, but they have low water absorption, water, and chloride permeability. Thus, nano-silica can develop concretes with lower water absorption, water permeability, and chloride permeability.

Journal

Innovative Infrastructure SolutionsSpringer Journals

Published: Apr 1, 2022

Keywords: Concrete; Microstructure; Durability; Nano-silica

References