Modifying Cement Hydration with NS@PCE Core-Shell Nanoparticles
Open Access
- 1 January 2017
- journal article
- research article
- Published by Hindawi Limited in Advances in Materials Science and Engineering
- Vol. 2017, 1-13
- https://doi.org/10.1155/2017/3823621
Abstract
It is generally accepted that fine particles could accelerate cement hydration process, or, more specifically, this accelerating effect can be attributed to additional surface area introduced by fine particles. In addition to this view, the surface state of fine particles is also an important factor, especially for nanoparticles. In the previous study, a series of nano-SiO2-polycarboxylate superplasticizer core-shell nanoparticles (NS@PCE) were synthesized, which have a similar particle size distribution but different surface properties. In this study, the impact of NS@PCE on cement hydration was investigated by heat flow calorimetry, mechanical property measurement, XRD, and SEM. Results show that, among a series of NS@PCE, NS@PCE-2 with a moderate shell-core ratio appeared to be more effective in accelerating cement hydration. As dosage increases, the efficiency of NS@PCE-2 would reach a plateau which is quantified by various characteristic values. Compressive strength results indicate that strength has a linear correlation with cumulative heat release. A hypothesis was proposed to explain the modification effect of NS@PCE, which highlights a balance between initial dispersion and pozzolanic reactivity. This paper provides a new understanding for the surface modification of supplementary cementitious materials and their application and also sheds a new light on nano-SiO2 for optimizing cement-based materials.Keywords
Funding Information
- National Natural Science Foundation of China (51408273, 51438003)
This publication has 30 references indexed in Scilit:
- Substantial global carbon uptake by cement carbonationNature Geoscience, 2016
- The synergistic effect of nano-silica with blast furnace slag in cement based materialsConstruction and Building Materials, 2016
- Hydration, microstructure and phase composition of composite cements containing nano-clayConstruction and Building Materials, 2016
- Catalytic behavior of graphene oxide for cement hydration processJournal of Physics and Chemistry of Solids, 2016
- Influences of nano-TiO2 on the properties of cement-based materials: Hydration and drying shrinkageConstruction and Building Materials, 2015
- Effects of nano-SiO2 particles on the mechanical and microstructural properties of ultra-high performance cementitious compositesCement and Concrete Composites, 2014
- Carbon dioxide equivalent (CO2-e) emissions: A comparison between geopolymer and OPC cement concreteConstruction and Building Materials, 2013
- Effects of colloidal nanoSiO2 on fly ash hydrationCement and Concrete Composites, 2012
- RETRACTED: Al2O3 nanoparticles in concrete and different curing mediaEnergy and Buildings, 2011
- The effect of TiO2 nanoparticles on water permeability and thermal and mechanical properties of high strength self-compacting concreteMaterials Science and Engineering: A, 2010