Specification for ground granulated blastfurnace slag for use with Portland cement

2015 ◽  
Keyword(s):  
Portland Cement ◽  
Blastfurnace Slag

Chloride Permeability Of Concrete Containing A Flyash And A Blastfurnace Slag

1988 ◽  
Vol 137 ◽  
Author(s):  
Mitsunori Kawamura ◽  
Kazuyuki Torii
Keyword(s):  
Portland Cement ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Mercury Intrusion Porosimetry ◽  
Chloride Permeability ◽  
Curing Conditions ◽  
Mercury Intrusion ◽  
Blastfurnace Slag ◽  
Low Humidity

AbstractThe effects of curing conditions on the chloride permeability of concrete with various replacements of Portland cement by a flyash and a blastfurnace slag was investigated. In order to relate the porosity and pore size distribution of concretes to their chloride permeability, mercury intrusion porosimetry measurements were also conducted. The results showed that exposure of concretes to a relatively low humidity at early ages increased their chloride permeability. It was also found that the chloride permeability of concrete increased proportionally with increasing volume of pores larger than 0.1 μm in diameter.

Microstructure and Microchemistry of Slag Cement Pastes

1986 ◽  
Vol 85 ◽  
Author(s):  
A. M. Harrisson ◽  
N. B. Winter ◽  
H. F. W. Taylor
Keyword(s):  
Portland Cement ◽  
Bound Water ◽  
Compositional Variation ◽  
Slag Cement ◽  
Cement Pastes ◽  
Blastfurnace Slag ◽  
The Individual ◽  
Bound Water Content ◽  
Water Contents

ABSTRACTPastes of a portland cement (60%) blended with a granulated blastfurnace slag (40%) were examined, principally by SEM with EDX analysis. Reaction rims around slag particles and relicts of fully reacted slag particles had compositions compatible with mixtures, in varying proportions, of C-S-H having Si/Ca -0.62 and a phase of the hydrotalcite family having Al/Mg -0.38. Calculations taking into account relevant densities and water contents indicated that replacement of the slag by its in situ hydration products entails little or no change in the numbers of Mg and 0 atoms per unit volume, but that substantial proportions of the Ca, Si and Al are released and an equivalent amount of H gained. In other respects, the microstructures qualitatively resembled those of pure portland cement pastes of similar ages, but less CH was formed and the C-S-H not formed in situ from the slag had a Si/Ca ratio of 0.56, higher than that of 0.50 to 0.53 found in the absence of slag. None of the individual phases in the slag cement pastes showed significant compositional variation with time in the 28 day to 14 month period studied. The relative amounts of Ca, Si and Al expelled from the slag are such that, in order to form C-S-H and AFm phase, more Ca is required. It is obtained partly at the expense of CH formation, and partly through increase in the Si/Ca ratio of the C-S-H formed from the clinker phases. Mass balance, volume composition and bound water content were calculated for the 14 month old paste and compared with corresponding results for the pure portland cement.

scholarly journals Effect of blastfurnace slag addition to Portland cement for cationic exchange resins encapsulation

2013 ◽  
Vol 56 ◽  
pp. 02003
Author(s):  
E. Lafond ◽  
C. Cau Dit Coumes ◽  
S. Gauffinet ◽  
D. Chartier ◽  
P. Le Bescop ◽  
...  
Keyword(s):  
Portland Cement ◽  
Blastfurnace Slag ◽  
Cationic Exchange ◽  
Exchange Resins

Microstructure and Microchemistry of Slag Cement Pastes

1986 ◽  
Vol 86 ◽  
Author(s):  
A. M. Harrisson ◽  
N. B. Winter ◽  
H. F. W. Taylor
Keyword(s):  
Portland Cement ◽  
Bound Water ◽  
Compositional Variation ◽  
Slag Cement ◽  
Cement Pastes ◽  
Blastfurnace Slag ◽  
The Individual ◽  
Bound Water Content ◽  
Water Contents

ABSTRACTPastes of a portland cement (60%) blended with a granulated blastfurnace slag (40%) were examined, principally by SEM with EDX analysis. Reaction rims around slag particles and relicts of fully reacted slag particles had compositions compatible with mixtures, in varying proportions, of C-S-H having Si/Ca -0.62 and a phase of the hydrotalcite family having Al/Mg -0.38. Calculations taking into account relevant densities and water contents. indicated that replacement of the slag by its in situ hydration products entails little or no change in the numbers of Mg and O atoms per unit volume, but that substantial proportions of the Ca, Si and Al are released and an equivalent amount of H gained. In other respects, the microstructures qualitatively resembled those of pure portland cement pastes of similar ages, but less CH was formed and the C-S-H not formed in situ from the slag had a Si/Ca ratio of 0.56, higher than that of 0.50 to 0.53 found in the absence of slag. None of the individual phases in the slag cement pastes showed significant compositional variation with time in the 28 day to 14 month period studied. The relative amounts of Ca, Si and Al expelled from the slag are such that, in order to form C-S-H and AFm phase, more Ca is required. It is obtained partly at the expense of CH formation, and partly through increase in the Si/Ca ratio of the C-S-H formed from the clinker phases. Mass balance, volume composition and bound water content were calculated for the 14 month old paste and compared with corresponding results for the pure portland cement.

scholarly journals BLASTFURNACE SLAG-PORTLAND CEMENT PLUGGING MATERIAL FOR HIGH TEMPERATURE WELLS STRENGTHENING

2016 ◽  
pp. 61-66
Author(s):  
V. P. Ovchinnikov ◽  
N. A. Aksyonova ◽  
O. V. Rozhkova ◽  
T. A. Kharitonova ◽  
V. A. Fedorovskaya
Keyword(s):  
Blast Furnace ◽  
High Temperature ◽  
Portland Cement ◽  
Oil And Gas ◽  
Material Composition ◽  
Gas Wells ◽  
Oil And Gas Wells ◽  
Blastfurnace Slag

The authors suggest a solution of the problem of improving the quality of oil and gas wells cementing in the high temperature intervals by using the blast-furnace wastes as granulated slags introduced in the plugging material composition.

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