Performance of lightweight cementitious composite incorporating carbon nanofibers

Cellular concrete is a type of lightweight concrete traditionally applied in building industry for its thermal and acoustic insulation properties. However, in recent years, there is a surge in interest in potential applications of cellular concrete as a structural component due to its low self-weigh...

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Main Authors: Wang, Su, Lim, Jacob Lok Guan, Tan, Kang Hai
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2022
Subjects:
Online Access:https://hdl.handle.net/10356/161160
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1611602022-08-17T02:48:32Z Performance of lightweight cementitious composite incorporating carbon nanofibers Wang, Su Lim, Jacob Lok Guan Tan, Kang Hai School of Civil and Environmental Engineering CeEntek Pte Ltd Engineering::Civil engineering Lightweight Concrete Micro-Foam Cellular concrete is a type of lightweight concrete traditionally applied in building industry for its thermal and acoustic insulation properties. However, in recent years, there is a surge in interest in potential applications of cellular concrete as a structural component due to its low self-weight, saving in raw materials and sustainability. Cellular concrete can be broadly divided into aerated concrete and foam concrete based on the pore-formation approaches. However, foam concrete is preferred to aerated concrete for structural applications due to better bubble size distribution, non-autoclaved curing process and no limitations in the dimensions of components. The main challenge for foam concrete is to have high-performance pore walls to provide required mechanical properties, shrinkage resistance, and durability under reduced density. In this paper, an ultrahigh performance concrete (UHPC) produced by a low water/cement ratio, optimum particle grading and incorporating carbon nanofibers (CNFs) was used as a base mix. It was then blended with homogeneous micro-foam bubbles to produce a lightweight cementitious composite (CNF-LCC) with 1500 ± 50 kg/m3 density for structural use. The novelty of CNF-LCC is that it has excellent mechanical properties and bond strength with steel reinforcement compared with traditional foam concrete, which is promising for structural applications. In addition, other engineering properties including early-age shrinkage resistance and durability of CNF-LCC are superior to normal weight concrete and lightweight aggregate concrete. Furthermore, CNFs can produce varying degrees of improvement on these engineering properties due to modification of its microstructure. The authors would like to acknowledge financial and materials support from ceEntek Pte Ltd. 2022-08-17T02:48:31Z 2022-08-17T02:48:31Z 2020 Journal Article Wang, S., Lim, J. L. G. & Tan, K. H. (2020). Performance of lightweight cementitious composite incorporating carbon nanofibers. Cement and Concrete Composites, 109, 103561-. https://dx.doi.org/10.1016/j.cemconcomp.2020.103561 0958-9465 https://hdl.handle.net/10356/161160 10.1016/j.cemconcomp.2020.103561 2-s2.0-85081132542 109 103561 en Cement and Concrete Composites © 2020 Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
Lightweight Concrete
Micro-Foam
spellingShingle Engineering::Civil engineering
Lightweight Concrete
Micro-Foam
Wang, Su
Lim, Jacob Lok Guan
Tan, Kang Hai
Performance of lightweight cementitious composite incorporating carbon nanofibers
description Cellular concrete is a type of lightweight concrete traditionally applied in building industry for its thermal and acoustic insulation properties. However, in recent years, there is a surge in interest in potential applications of cellular concrete as a structural component due to its low self-weight, saving in raw materials and sustainability. Cellular concrete can be broadly divided into aerated concrete and foam concrete based on the pore-formation approaches. However, foam concrete is preferred to aerated concrete for structural applications due to better bubble size distribution, non-autoclaved curing process and no limitations in the dimensions of components. The main challenge for foam concrete is to have high-performance pore walls to provide required mechanical properties, shrinkage resistance, and durability under reduced density. In this paper, an ultrahigh performance concrete (UHPC) produced by a low water/cement ratio, optimum particle grading and incorporating carbon nanofibers (CNFs) was used as a base mix. It was then blended with homogeneous micro-foam bubbles to produce a lightweight cementitious composite (CNF-LCC) with 1500 ± 50 kg/m3 density for structural use. The novelty of CNF-LCC is that it has excellent mechanical properties and bond strength with steel reinforcement compared with traditional foam concrete, which is promising for structural applications. In addition, other engineering properties including early-age shrinkage resistance and durability of CNF-LCC are superior to normal weight concrete and lightweight aggregate concrete. Furthermore, CNFs can produce varying degrees of improvement on these engineering properties due to modification of its microstructure.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Wang, Su
Lim, Jacob Lok Guan
Tan, Kang Hai
format Article
author Wang, Su
Lim, Jacob Lok Guan
Tan, Kang Hai
author_sort Wang, Su
title Performance of lightweight cementitious composite incorporating carbon nanofibers
title_short Performance of lightweight cementitious composite incorporating carbon nanofibers
title_full Performance of lightweight cementitious composite incorporating carbon nanofibers
title_fullStr Performance of lightweight cementitious composite incorporating carbon nanofibers
title_full_unstemmed Performance of lightweight cementitious composite incorporating carbon nanofibers
title_sort performance of lightweight cementitious composite incorporating carbon nanofibers
publishDate 2022
url https://hdl.handle.net/10356/161160
_version_ 1743119558372229120