Journal ArticleDOI
Micro-mechanical properties of cement paste measured by depth-sensing nanoindentation: a preliminary correlation of physical properties with phase type
John Hughes,Pavel Trtik +1 more
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TLDR
In this paper, a simple Portland cement paste with a water/cement ratio of 0.45 without aggregate was prepared and cured for a minimum of 1 month under water, and one sample was subjected to depth-sensing nanoindentation over a regular grid of 50 positions on the sample, each spaced at 50 μm.About:
This article is published in Materials Characterization.The article was published on 2004-11-01. It has received 139 citations till now. The article focuses on the topics: Portland cement & Cement.read more
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Influence of nano-silica agglomeration on microstructure and properties of the hardened cement-based materials
TL;DR: In this article, the influence of nano-silica agglomeration on microstructure and properties of the hardened cement-based materials was investigated by using precipitated silica (PS) with very large agglomers and fumed silica with much smaller ones as nanoscale additives.
Journal ArticleDOI
A Coupled Nanoindentation/SEM‐EDS Study on Low Water/Cement Ratio Portland Cement Paste: Evidence for C–S–H/Ca(OH)2 Nanocomposites
TL;DR: In this paper, a low water/cement ratio (w/c=0.20) hydrated Portland cement paste was analyzed by grid-indentation coupled with ex situ scanning electron microscope-energy-dispersive X-ray spectra (SEM-EDS) analysis at each indentation point.
Journal ArticleDOI
Nanoindentation mapping of mechanical properties of cement paste and natural rocks
TL;DR: In this paper, the authors reported a study to assess nanoindentation mapping of mechanical properties of cement paste and natural rocks, and determined the Young's modulus and hardness of individual mineral phases.
Journal ArticleDOI
A Reliable Technique to Determine the Local Mechanical Properties at the Nanoscale for Cementitious Materials
TL;DR: In this paper, the same probe is used to indent and image eliminating the complicated situation of locating the same area with different instruments or coupling two different instruments, such as a SEM and a nanoindenter to work together.
Journal ArticleDOI
A review on the mechanical properties of cement-based materials measured by nanoindentation
Chuanlin Hu,Zongjin Li +1 more
TL;DR: In this paper, a comprehensive review on the mechanical properties of cement-based materials measured by nanoindentation is presented, and the critical aspects of nano-indentations in application to building materials are discussed.
References
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Journal ArticleDOI
Determination by nanoindentation of elastic modulus and hardness of pure constituents of Portland cement clinker
TL;DR: In this paper, the properties of Portland cements (C3S and alite, C2S, C3A, C4AF) were measured at the microscopic scale by nanoindentation and at the macroscopic scale by the resonance frequencies technique.
Journal ArticleDOI
Microhardness testing of cementitious materials
TL;DR: In this article, the authors discuss the underlying principles of microhardness testing, addressing the theoretical background and the testing procedures, highlighting the advantage and limitations of this technique and providing guidelines for its proper use in the research of cementitious systems.
Journal ArticleDOI
Assessment of interfacial microstructure and bond properties in aged GRC using a novel microindentation method
Wenzhong Zhu,P. Bartos +1 more
TL;DR: In this article, changes of microstructure and properties in the interfacial zone of glass fibre reinforced cement (GRC) under the effect of ageing were investigated, and the results showed that the embrittlement of aged GRC was closely associated with a substantial increase of the microstrength values within the fibre bundle during the ageing process.
Journal ArticleDOI
Effects of an early or a late heat treatment on the microstructure and composition of inner C-S-H products of Portland cement mortars
TL;DR: In this article, the influence of both early and late heat treatments on the microstructure and on the hydration products of Portland cement mortars has been investigated using backscattered electron (BSE) imaging.
Journal ArticleDOI
Heat curing and post-heat curing regimes of high-performance concrete: Influence on microstructure and C-S-H composition
TL;DR: In this article, the effect of heat curing and post-heat conditions on the microstructure and C-S-H composition of a high-performance concrete has been investigated and some previously studied cement paste specimens of ordinary w c ratio hydrated at various temperatures have been reanalyzed.
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