A facile approach of developing micro crystalline cellulose reinforced cementitious composites with improved microstructure and mechanical performance

Lívia Silva, Shama Parveen, Aloysio Filho, Amanda Zottis, Sohel Rana, Romel Vanderlei, Raul Fangueiro

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In the present study, microcrystalline cellulose (MCC) reinforced cementitious composites have been developed using a short and less energy intensive physical dispersion technique. MCC–cement mortar specimens were prepared through addition of aqueous MCC suspensions to the cement-sand mixture. Aqueous MCC suspensions (0.4%, 0.8%, 1.2%, 1.6% and 2% MCC, by weight) were prepared through magnetic stirring of pre-soaked MCC powder for only 45 min. The flow behaviour of freshly prepared MCC-mortar paste as well as bulk density, mechanical performance, microstructure, porosity, water uptake and hydration products of developed cementitious composites were characterized. It was noted that with the increase of MCC content, the flow of mortar paste decreased significantly. Maximum improvements of 20.5% in flexural strength, 19.8% in compressive strength, 100% in flexural modulus and 27.2% in fracture energy were achieved after 28 days of hydration. Mechanical performance was found to be better at lower MCC concentrations and at early hydration days. The addition of MCC significantly reduced the pore size of cementitious matrix, leading to increased dry bulk density and reduced water uptake as compared to the plain mortar specimens.
LanguageEnglish
Pages654-663
Number of pages10
JournalPowder Technology
Volume338
Early online date20 Jul 2018
DOIs
Publication statusPublished - 1 Oct 2018
Externally publishedYes

Fingerprint

Cellulose
Crystalline materials
Microstructure
Composite materials
Mortar
Hydration
Ointments
Suspensions
Cements
microcrystalline cellulose
Fracture energy
Water
Bending strength
Density (specific gravity)
Powders
Compressive strength
Pore size
Sand
Porosity

Cite this

@article{966b856e4bce4bee9584fce093ced7e8,
title = "A facile approach of developing micro crystalline cellulose reinforced cementitious composites with improved microstructure and mechanical performance",
abstract = "In the present study, microcrystalline cellulose (MCC) reinforced cementitious composites have been developed using a short and less energy intensive physical dispersion technique. MCC–cement mortar specimens were prepared through addition of aqueous MCC suspensions to the cement-sand mixture. Aqueous MCC suspensions (0.4{\%}, 0.8{\%}, 1.2{\%}, 1.6{\%} and 2{\%} MCC, by weight) were prepared through magnetic stirring of pre-soaked MCC powder for only 45 min. The flow behaviour of freshly prepared MCC-mortar paste as well as bulk density, mechanical performance, microstructure, porosity, water uptake and hydration products of developed cementitious composites were characterized. It was noted that with the increase of MCC content, the flow of mortar paste decreased significantly. Maximum improvements of 20.5{\%} in flexural strength, 19.8{\%} in compressive strength, 100{\%} in flexural modulus and 27.2{\%} in fracture energy were achieved after 28 days of hydration. Mechanical performance was found to be better at lower MCC concentrations and at early hydration days. The addition of MCC significantly reduced the pore size of cementitious matrix, leading to increased dry bulk density and reduced water uptake as compared to the plain mortar specimens.",
keywords = "Cementitious composites, Mechanical performance, Mercury intrusion Porosimetry, Micro crystalline cellulose dispersion, Microstructure",
author = "L{\'i}via Silva and Shama Parveen and Aloysio Filho and Amanda Zottis and Sohel Rana and Romel Vanderlei and Raul Fangueiro",
year = "2018",
month = "10",
day = "1",
doi = "10.1016/j.powtec.2018.07.076",
language = "English",
volume = "338",
pages = "654--663",
journal = "Powder Technology",
issn = "0032-5910",
publisher = "Elsevier",

}

A facile approach of developing micro crystalline cellulose reinforced cementitious composites with improved microstructure and mechanical performance. / Silva, Lívia; Parveen, Shama; Filho, Aloysio; Zottis, Amanda; Rana, Sohel; Vanderlei, Romel; Fangueiro, Raul.

In: Powder Technology, Vol. 338, 01.10.2018, p. 654-663.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A facile approach of developing micro crystalline cellulose reinforced cementitious composites with improved microstructure and mechanical performance

AU - Silva, Lívia

AU - Parveen, Shama

AU - Filho, Aloysio

AU - Zottis, Amanda

AU - Rana, Sohel

AU - Vanderlei, Romel

AU - Fangueiro, Raul

PY - 2018/10/1

Y1 - 2018/10/1

N2 - In the present study, microcrystalline cellulose (MCC) reinforced cementitious composites have been developed using a short and less energy intensive physical dispersion technique. MCC–cement mortar specimens were prepared through addition of aqueous MCC suspensions to the cement-sand mixture. Aqueous MCC suspensions (0.4%, 0.8%, 1.2%, 1.6% and 2% MCC, by weight) were prepared through magnetic stirring of pre-soaked MCC powder for only 45 min. The flow behaviour of freshly prepared MCC-mortar paste as well as bulk density, mechanical performance, microstructure, porosity, water uptake and hydration products of developed cementitious composites were characterized. It was noted that with the increase of MCC content, the flow of mortar paste decreased significantly. Maximum improvements of 20.5% in flexural strength, 19.8% in compressive strength, 100% in flexural modulus and 27.2% in fracture energy were achieved after 28 days of hydration. Mechanical performance was found to be better at lower MCC concentrations and at early hydration days. The addition of MCC significantly reduced the pore size of cementitious matrix, leading to increased dry bulk density and reduced water uptake as compared to the plain mortar specimens.

AB - In the present study, microcrystalline cellulose (MCC) reinforced cementitious composites have been developed using a short and less energy intensive physical dispersion technique. MCC–cement mortar specimens were prepared through addition of aqueous MCC suspensions to the cement-sand mixture. Aqueous MCC suspensions (0.4%, 0.8%, 1.2%, 1.6% and 2% MCC, by weight) were prepared through magnetic stirring of pre-soaked MCC powder for only 45 min. The flow behaviour of freshly prepared MCC-mortar paste as well as bulk density, mechanical performance, microstructure, porosity, water uptake and hydration products of developed cementitious composites were characterized. It was noted that with the increase of MCC content, the flow of mortar paste decreased significantly. Maximum improvements of 20.5% in flexural strength, 19.8% in compressive strength, 100% in flexural modulus and 27.2% in fracture energy were achieved after 28 days of hydration. Mechanical performance was found to be better at lower MCC concentrations and at early hydration days. The addition of MCC significantly reduced the pore size of cementitious matrix, leading to increased dry bulk density and reduced water uptake as compared to the plain mortar specimens.

KW - Cementitious composites

KW - Mechanical performance

KW - Mercury intrusion Porosimetry

KW - Micro crystalline cellulose dispersion

KW - Microstructure

U2 - 10.1016/j.powtec.2018.07.076

DO - 10.1016/j.powtec.2018.07.076

M3 - Article

VL - 338

SP - 654

EP - 663

JO - Powder Technology

T2 - Powder Technology

JF - Powder Technology

SN - 0032-5910

ER -