Effect of hydrochloric acid on sound absorption and relaxation frequency in magnesium sulfate solutions

2002 ◽  
Vol 111 (5) ◽  
pp. 2399 ◽  
Author(s):  
F. H. Fisher
Keyword(s):  
Hydrochloric Acid ◽  
Magnesium Sulfate ◽  
Sound Absorption ◽  
Relaxation Frequency ◽  
Sulfate Solutions

scholarly journals Water-separated ion pairs cause the slow dielectric mode of magnesium sulfate solutions

2018 ◽  
Vol 148 (22) ◽  
pp. 222812 ◽  
Author(s):  
Shavkat I. Mamatkulov ◽  
Klaus F. Rinne ◽  
Richard Buchner ◽  
Roland R. Netz ◽  
Douwe Jan Bonthuis
Keyword(s):  
Magnesium Sulfate ◽  
Ion Pairs ◽  
Sulfate Solutions

scholarly journals Sulfate Resistance of Rice Husk Ash Concrete

2018 ◽  
Vol 199 ◽  
pp. 02006 ◽  
Author(s):  
John Kamau ◽  
Ash Ahmed ◽  
Killian Ngong
Keyword(s):  
Compressive Strength ◽  
Magnesium Sulfate ◽  
Rice Husk ◽  
Sodium Sulfate ◽  
Rice Husk Ash ◽  
Cement Concrete ◽  
Strength Deterioration ◽  
Sulfate Resistance ◽  
Expansion Test ◽  
Sulfate Solutions

Durability of concrete is defined as its ability to resist deterioration after exposure to the environment of its use. This work investigates the performance of Rice Husk Ash (RHA) concrete in sodium sulfate (Na2SO4), magnesium sulfate (MgSO4) and combined Na2SO4 and MgSO4 solutions. Concrete bar specimens and cubes were prepared for expansion and strength deterioration tests respectively using RHA replacement at the 7.5% replacement by volume, which had achieved the highest compressive strength, as well as at the 30% replacement by volume, which was the highest replacement for the study. Strength deterioration tests were performed on the 7.5% replacement by the weight of cement. From the expansion test findings, it was concluded that at the 7.5% replacement, RHA could be used with an advantage over 100% cement concrete in MgSO4 environments, whereas at the 30% replacement, RHA could be used with an advantage over 100% cement concrete in both the Na2SO4 and mixed sulfate environments. RHA was also found to be more effective in resisting surface deterioration in all the sulfate solutions. The RHA specimens also exhibited superior strength deterioration resistance in comparison to the 100% cement specimens.

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