The effect of cement composition and pH of environment on sulfate resistance of Portland cements and blended cements

1997 ◽  
Vol 19 (2) ◽  
pp. 161-171 ◽  
Author(s):  
H.T. Cao ◽  
L. Bucea ◽  
A. Ray ◽  
S. Yozghatlian
Keyword(s):  
Portland Cements ◽  
Blended Cements ◽  
Sulfate Resistance

scholarly journals Portland Cements with High Content of Calcined Clay: Mechanical Strength Behaviour and Sulfate Durability

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4206 ◽  
Author(s):  
Carlos H. Aramburo ◽  
César Pedrajas ◽  
Rafael Talero
Keyword(s):  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Chemical Effect ◽  
Portland Cements ◽  
Calcined Clay ◽  
Blended Cements ◽  
Sulfate Resistance ◽  
Type Iv ◽  
Mechanical Strengths ◽  
Mineralogical Compositions

Calcined clay has become the supplementary cementitious materials with the greatest potential to reduce the clinker/cement. In this research, the mechanical strengths and sulphate resistance of blended cements with a high content of calcined clay as a pozzolanic addition were evaluated to demonstrate that these cements could be designed as CEM (cement) type IV/A-SR and IV/B-SR cements by the current European standard UNE-EN 197-1: 2011. The blended cements were prepared by two Portland cements (P1 and PY6) with different mineralogical compositions and a calcined clay. The level of replacement was greater than 40% by weight. The results obtained confirm the decrease in the mechanical strengths and the increase in the sulfate resistance of the two Portland cements when they are replaced by calcined clay at a level of replacement greater than 40%. These results are a consequence of the chemical effect from the pozzolanic activity of the calcined clay. Therefore, there is an important decrease in portlandite levels of paste liquid phase that causes the increase in sulfate resistance and the decrease of the mechanical strengths.

Sulfate resistance of blended cements containing fly ash and rice husk ash

2007 ◽  
Vol 21 (6) ◽  
pp. 1356-1361 ◽  
Author(s):  
P. Chindaprasirt ◽  
P. Kanchanda ◽  
A. Sathonsaowaphak ◽  
H.T. Cao
Keyword(s):  
Fly Ash ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Blended Cements ◽  
Sulfate Resistance

Effect of very high limestone content and quality on the sulfate resistance of blended cements

2018 ◽  
Vol 188 ◽  
pp. 1065-1076 ◽  
Author(s):  
Andre Baldermann ◽  
Moien Rezvani ◽  
Tilo Proske ◽  
Cyrill Grengg ◽  
Florian Steindl ◽  
...  
Keyword(s):  
Blended Cements ◽  
Sulfate Resistance ◽  
Very High

scholarly journals Sulfate resistance of calcined clay – Limestone – Portland cements

2019 ◽  
Vol 116 ◽  
pp. 238-251 ◽  
Author(s):  
Zhenguo Shi ◽  
Sergio Ferreiro ◽  
Barbara Lothenbach ◽  
Mette Rica Geiker ◽  
Wolfgang Kunther ◽  
...  
Keyword(s):  
Portland Cements ◽  
Calcined Clay ◽  
Sulfate Resistance

Scientific Basis for Determining the Sulfate Resistance of Blended Cements

1987 ◽  
Vol 113 ◽  
Author(s):  
P. K. Mehta
Keyword(s):  
Scientific Basis ◽  
Sulfate Attack ◽  
Chemical Processes ◽  
Critical Examination ◽  
Blended Cements ◽  
Sulfate Resistance ◽  
Natural Pozzolans ◽  
Iron Blast Furnace ◽  
Physical And Chemical ◽  
Furnace Slag

ABSTRACTThe physical and chemical processes underlying the sulfate attack on concrete are briefly reviewed with special reference to blended portland cements containing natural pozzolans, fly ash, or granulated iron blast-furnace slag. Published literature contains empirical guidelines for evaluating the suitability of blending materials for sulfate resistance; however a critical examination shows that some of the guidelines are not satisfactory. Ideas for establishing a scientific basis for determining the sulfate resistance of blended cements are presented in the paper.

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