Influence of nano silica on the fresh, hardened and durability properties of self-cleaning white Portland cement mortars

Paper deals with development of face architectural fibre-cement composites based on white Portland cement with addition of photoactive TiO2. Tests were carried on composite binder and then on the composites. The role of TiO2 on performance of materials was monitored. Selected composites were tested on self-cleaning ability, de-NOx activity and resistance to weathering in outdoor conditions. Two series of thin-walled products based on developed composites were prepared with self-cleaning ability and de-NOx activity.

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Effect of Colloidal Nano-Silica on the Mechanical and Durability Performances of Mortar

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.629-630.443 ◽

2014 ◽

Vol 629-630 ◽

pp. 443-448 ◽

Cited By ~ 8

Author(s):

Hong Jian Du ◽

Sze Dai Pang

Keyword(s):

Compressive Strength ◽

Drying Shrinkage ◽

Pozzolanic Reaction ◽

Nano Silica ◽

Cement Ratio ◽

Durability Properties ◽

Cement Mortars ◽

Water To Cement Ratio ◽

Water Sorptivity ◽

Mixing Water

s. The mechanical and durability properties of cement mortars with colloidal nanosilica (CNS) were investigated experimentally. Reference mortar with a low water-to-cement ratio of 0.30 was used in this study. The influence of CNS was evaluated by adding 0.5, 1.0, 1.5 and 2.0% of CNS by weight of cement. CNS was first stirred in the mixing water for 2 minutes before added to cement and sand. Superplasticizer was used to maintain the same flowability. Results showed that the compressive strength consistently increases with higher dosage of CNS at all the curing ages, due to both hydration acceleration and pozzolanic reaction. With the increase in CNS, the migration coefficient and water sorptivity consistently decreased; with 2% of CNS, the migration coefficient and water sorptivity were reduced by 45% and 30% respectively in comparison with the reference mortar. The improved durability could be explained by the reduction and refinement in the porosity, which can be attributed to nanofiller effect and pozzolanic reaction of nanosilica. Furthermore, the addition of CNS could reduce the drying shrinkage by densifying the microstructure in the cement paste, which has not been reported previously.

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Design of Energy-Efficient White Portland Cement Mortars for Digital Fabrication

RILEM Bookseries - Second RILEM International Conference on Concrete and Digital Fabrication ◽

10.1007/978-3-030-49916-7_7 ◽

2020 ◽

pp. 64-72

Author(s):

Sibel Kurt ◽

Yiğit A. Atalay ◽

Ozan E. Aydın ◽

Berrak Avcıoğlu ◽

Tayfun Yıldırım ◽

...

Keyword(s):

Portland Cement ◽

Energy Efficient ◽

Digital Fabrication ◽

Cement Mortars ◽

White Portland Cement

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Production of Self-Cleaning SiO2/CNT Nanoparticles Substituted Cement Mortar

Engineering and Technology Journal ◽

10.30684/etj.v38i3a.349 ◽

2020 ◽

Vol 38 (3A) ◽

pp. 335-342

Author(s):

Layth Al-Gebory ◽

Aseel B. Al‐Zubaidi ◽

Ahmed A. Al‐Tabbakh

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Building Materials ◽

Cement Mortar ◽

Nano Silica ◽

Construction Engineering ◽

Cement Mortars ◽

Bending Resistance ◽

Reinforced Cement ◽

Self Cleaning

Manufacturing of building materials with unique properties is one of the most important key-parameters in the development of construction engineering and building materials. The development in the nanomaterials and nanotechnology can be utilized in this field. In this paper, production of eco-friendly, low water absorption and self-cleaning cement mortar reinforced with carbon nanotubes and nano-silica with different weight percentages (0.5%, 1.5%, and 2%) is performed. Results showed prominent improvement of hardness, compression strength and a decrease of water absorption and bending resistance in the reinforced cement mortars. The results show the possibility to control the mechanical properties of the cement mortars with minimal reinforcing agents provides the possibility to design these building materials for versatile applications.

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Influence of aggregate type and gradation on the microstructure and durability properties of portland cement mortar and concrete

International RILEM Symposium on Concrete Science and Engineering: A Tribute to Arnon Bentur ◽

10.1617/2912143586.019 ◽

2004 ◽

Cited By ~ 3

Author(s):

A. Elsharief

Keyword(s):

Portland Cement ◽

Cement Mortar ◽

Durability Properties

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Evaluating Micro-Structure, Hydration and Thermal Expansions of Cement Containing Nano-Silica

GIS Business ◽

10.26643/gis.v15i1.18226 ◽

2020 ◽

Vol 15 (1) ◽

pp. 158-165 ◽

Cited By ~ 1

Author(s):

Dr. Sarvesh PS Rajput

Keyword(s):

Portland Cement ◽

Mechanical Characteristics ◽

Microstructural Properties ◽

Nano Silica ◽

Micro Structure ◽

Microstructural Characteristics ◽

Mechanical And Microstructural Properties

This study reported that the addition of nano-silica enhances the mechanical characteristics of concrete as its compressive, flexural and tensile split strengths are increased. As a comparison mixture to equate it along with nano-modified concrete, ordinary samples of Portland cement (OPC) have been utilized. Herein, upto 6.0 percent of OPC has been substituted by nanosilica. In fact, the introduction of nanosilica improves mechanical and microstructural characteristics of concrete by significantly (28 to 35%). The finding therefore, indicated that partly replacing OPC with up to 5 percent nanosilica increases the mechanical and microstructural properties cured up to ninety days as opposed to the standard OPC mix.

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