Results 171 to 180 of about 2,326 (201)

Cement paste–epoxy adhesive interactions

Construction and Building Materials, 2011
In the field of civil engineering, the durability of concrete assemblies using adhesives is widely conditioned by the properties of the interface between the resin and the mineral support (concrete). In this context we studied first the molecular interactions at the interface between an epoxy resin and cement pastes by several approaches based on XPS ...
Djouani, Fatma, Connan, Carole, Delamar, Michel, Chehimi, Mohamed M, Benzarti, Karim   +4 more
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Premixed calcium–phosphate cement pastes

Journal of Biomedical Materials Research Part B: Applied Biomaterials, 2003
AbstractA self‐hardening calcium–phosphate cement (CPC) containing Ca4(PO4)2O and CaHPO4 has been shown in clinical studies to be efficacious for repairing bone defects. This and several other similar CPCs harden in 10 min with the use of a phosphate solution as the liquid and form hydroxyapatite (HA) as the product.
Shozo, Takagi, Laurence C, Chow, Satoshi, Hirayama, Akiyoshi, Sugawara   +3 more
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Workability of Cement Pastes

ACI Materials Journal, 2001
This research investigated problems that have occurred when high-range, water-reducing admixtures have been used with various cements. The literature survey showed that prior work indicated that the problems were caused by the specific surface area, sulfate morphology, and aluminate content of the cements. The experimental work involved a comprehensive
openaire   +1 more source

Hydration of Cement Pastes Using the Cement LC3

2019
Nowadays, cement is still one of the most consumed products in the world, and has grown more significantly. Thus, the use of supplementary cementitious materials (SCMs) to some extent reduces the carbon dioxide (CO2) emissions in the environment, contributing to the formation of a sustainable cement. In this context, Limestone Calcined Clay Cement (LC3)
Myrelle Y. F. Câmara, Yuri S. B. Fraga, Valdirene M. S. Capuzzo   +2 more
openaire   +1 more source

Surface magnetic relaxation in cement pastes

Magnetic Resonance Imaging, 1994
Surface magnetic relaxation in porous media is usually attributed to hindered rotation or to paramagnetic impurities on the surface. In cement pastes, however, it seems reasonable to attribute surface relaxation to dipole interactions in water adsorbed as water of hydration on grain surfaces.
K S, Mendelson, W P, Halperin, J Y, Jehng, Y Q, Song   +3 more
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Smart cement paste with carbon nanotubes

2016
Carbon nanotubes can be added to cementitious materials to create a multifunctional nanocomposite with excellent piezoresistive and strain-sensing properties. The use of carbon nanotubes provides high strain sensitivity and signal-to-noise ratio, which are ideal for fabricating self-sensing nanocomposite cement paste for applications to structural ...
UBERTINI, Filippo, Simon, Laflamme, D'ALESSANDRO, ANTONELLA   +2 more
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Influence of cement constitution and temperature on chloride binding in cement paste

Advances in Cement Research, 2000
This paper describes effects of cement constitution and temperature on chloride binding in cement paste, which is an important subject in relation to lifetime modelling of reinforced concrete structures. The influence of cement constitution on chloride binding is investigated by substituting cement with pure cement clinker.
Jensen, Ole Mejlhede, Korzen, M. S. H., Jakobsen, H. J., Skibsted, J.   +3 more
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The Properties of Cement Paste

2014
In Chapter 5 the following issues are presented: Rheological properties of concrete, Relationship between the microstructure and strength of cement paste and Deformation of the paste. Cement paste is a Bingham fluid and shows as a rule the thixotropic behaviour. The flow of the paste can be relatively well presented by several models from which Bingham
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Using Dehydrated Cement Paste as New Type of Cement Additive

ACI Materials Journal, 2013
This paper presents an experimental study, including evaluation and modification, on using dehydrated cement paste (DCP) as a new type of cement additive. After a series of processes, normal DCP (N-DCP) was produced as before and a modified form of DCP (M-DCP) was produced as well. The cementitious characteristics of the groups with different kinds and
Yu, R., Shui, Z.H., Dong, J
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Positron annihilation in cement paste

Cement and Concrete Research, 1982
Abstract Changes of positron annihilation processes during hydratation of cement paste were observed. Decrease of long living component intensity and its lifetime with the storage time of paste was found. Typical for porous media a very long living component was observed in dried samples, which diminished when pores were filled by water adsorbed from
T. Rybke, C. Rybka, T. Goworek, R. Wasiewicz, J. Wawryszczuk   +4 more
openaire   +1 more source