scholarly journals Effect of Pyrogenic Silica and Nanosilica on Portland Cement Matrices

2018 ◽  
Vol 30 (10) ◽  
pp. 04018266 ◽  
Author(s):  
Jorge I. Tobón ◽  
Oscar Mendoza Reales ◽  
Oscar Jaime Restrepo ◽  
María Victoria Borrachero ◽  
Jordi Payá
Keyword(s):  
Portland Cement ◽  
Pyrogenic Silica ◽  
Cement Matrices

A cleaner material production by the incorporation of the rockwool waste into portland cement matrices

2021 ◽  
Vol 293 ◽  
pp. 126059
Author(s):  
Maiara Goulart Medeiros ◽  
Willian Cézar Nadaleti ◽  
Janaide Cavalcante Rocha ◽  
Malik Cheriaf ◽  
Philippe Jean Paul Gleise ◽  
...  
Keyword(s):  
Portland Cement ◽  
Material Production ◽  
Cement Matrices

scholarly journals Use of ancient copper slags in Portland cement and alkali activated cement matrices

2016 ◽  
Vol 167 ◽  
pp. 115-123 ◽  
Author(s):  
Amin Nazer ◽  
Jordi Payá ◽  
María Victoria Borrachero ◽  
José Monzó
Keyword(s):  
Portland Cement ◽  
Cement Matrices ◽  
Alkali Activated ◽  
Alkali Activated Cement

scholarly journals Effect of nano-silica on Portland cement matrices containing supplementary cementitious materials

2021 ◽  
Vol 14 (4) ◽  
Author(s):  
Thiago Melanda Mendes ◽  
Wellington Longuini Repette
Keyword(s):  
Portland Cement ◽  
Mechanical Performance ◽  
Mercury Porosimetry ◽  
Cementitious Materials ◽  
Nano Particles ◽  
Supplementary Cementitious Materials ◽  
Nano Silica ◽  
Fixed Amount ◽  
Cement Pastes ◽  
Cement Matrices

abstract: For a controlled granulometry, this study evaluates the effect of nano-silica on mechanical and rheological properties, as well in the microstructure of Portland cement matrices containing a fixed amount of supplementary cementitious materials and three different types of cements. The rheological behavior of cement pastes was evaluated by rotational rheometry and mechanical performance was measured througth the compressive strength. The microstructure was analyzed by intrusion mercury porosimetry and scanning electron microscopy. There was an increasing on the viscosity of the cementitious matrices, as a consequence of the reduction in the inter particle separation of these suspensions. The optimum content of nano-silica varied according to Ca/Si ratio of Portland cement matrices containing supplementary cementitious materials. The use of nano-silica allowed to modify the pore size distribution of cementitious matrices. And the structure of nano-silica in cementitious matrices has occurred in layers or agglomerates of nano-particles covered by hydration products.

The Chemical Environment in Cement Matrices

1985 ◽  
Vol 50 ◽  
Author(s):  
M. J. Angus ◽  
F. P. Glasser
Keyword(s):  
Portland Cement ◽  
Experimental Methods ◽  
Chemical Environment ◽  
Pore Fluids ◽  
Slag Cement ◽  
Redox Behaviour ◽  
Cement Matrices

AbstractGeneral progress in modelling the behaviour of cement matrices and their interactions with wastes is reviewed in terms of appropriate model-ling concepts and their formulation in terms of parameters Which are susceptible to evaluation. The redox behaviour, particularly of slag-cement blends is shown to differ sharply from that of Portland cement matrices. Experimental methods of measuring Eh and poising capacities are described and the composition of pore fluids determined. Slag cements contain appreciable soluble Sn− species as well as S2O32− and SO42−

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