Results 241 to 250 of about 315,352 (293)

Controlling the Cohesion of Cement Paste

Langmuir, 2005
The main source of cohesion in cement paste is the nanoparticles of calcium silicate hydrate (C-S-H), which are formed upon the dissolution of the original tricalcium silicate (C(3)S). The interaction between highly charged C-S-H particles in the presence of divalent calcium counterions is strongly attractive because of ion-ion correlations and a ...
Jönsson, B., Nonat, A., Labbez, C., Cabane, B., Wennerström, H.   +4 more
openaire   +3 more sources

Effect of wet carbonated recycled cement paste powder on the rheology of cement paste

Cement and Concrete Research
Xiang Hu, Sarra DRISSI, Yuguang Mao
exaly   +2 more sources

Cement Paste and Concrete

Annual Review of Materials Science, 1973
This paper outlines the current state of knowledge as regards the chemical and physical aspects of the structure of hardened cement paste, then relates the properties of shrinkage, inelastic behavior, and creep to structure. Some significant recent developments in materials for concrete production are presented.
T C Hansen, F Radjy, E J Sellevold
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Heat deformations of cement paste phases and the microstructure of cement paste

Materials and Structures, 1984
The paper presents the results of an experimental investigation of the influence of thermal deformations of phases present in hardened cement paste on its microstructure. For the observation of the thermal deformation course in the range of temperature20–800°C, a method of complex thermal analysis (DTA, DTD, TD) was employed.
openaire   +1 more source

Water Confined in Cement Pastes as a Probe of Cement Microstructure Evolution

The Journal of Physical Chemistry B, 2009
The properties of the water confined in a hydrating white cement paste have been investigated using low-temperature differential scanning calorimetry (LT-DSC) and low-temperature near infrared spectroscopy (LT-NIR). LT-DSC thermograms show, upon cooling, several exothermic peaks in the temperature range -10 to -42 degrees C, whose position and area ...
RIDI, FRANCESCA, LUCIANI, PAOLA, FRATINI, EMILIANO, BAGLIONI, PIERO   +3 more
openaire   +2 more sources

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

Analytical Electron Microscopy of Cement Pastes: II, Pastes of Portland Cements and Clinkers

Journal of the American Ceramic Society, 1980
Three hundred sixty‐five particles of C‐S‐H, Ca(OH) 2 , AFm phase, and AFt phase from pastes of normally ground portland cements and of finely ground cements and clinkers were analyzed. All the phases, except the Ca(OH) 2 , showed significant variation ...
E. E. LACHOWSKI, K. MOHAN, H. F. W. TAYLOR, A. E. MOORE   +3 more
openaire   +1 more source

Chloride ingress in cement paste and mortar

Cement and Concrete Research, 1999
In this paper chloride ingress in cement paste and mortar is followed by electron probe microanalysis. The influence of several paste and exposure parameters on chloride ingress are examined (e.g., water-cement ratio, silica fume addition, exposure time, and temperature).
Jensen, Ole Mejlhede, Hansen, Per Freiesleben, Coats, A. M., Glasser, F. P.   +3 more
openaire   +2 more sources

Study of the Dielectric Characteristics of Cement Paste

Materials Science Forum, 1998
The characterization of the microstructure of cementitious materials by means of Impedance Spectroscopy (IS) is attracting an increasing interest. This is due not only to the importance of the cement cover on steel corrosion, but because of the possibility of characterise aspects like hydration degree of cement or water content.
Alonso, M. Cruz, Andrade Perdrix, Carmen, Keddam, Michel, Nóvoa, X. R., Takenouti, Hisasi   +4 more
openaire   +2 more sources

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
openaire   +2 more sources