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Effects of fly ash and silica fume on the resistance of mortar to sulfuric acid and sulfate attack

✍ Scribed by Kazuyuki Torii; Mitsunori Kawamura

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
740 KB
Volume
24
Category
Article
ISSN
0008-8846

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✦ Synopsis

ABSTRCT

Changes in physical and chemical properties in the mortars with different replacements by fly ash and silica fume when immersed in 2 % H2SO4, 10 % Na2SO4 and 10% MgSO4 solutions for 3 years were investigated.

The long-term exposure test data showed that the replacement of portland cement by fly ash and silica fume effectively improved the resistance of the mortar to the sulfuric acid and sulfate solution attack. However, the replacement percentage by fly ash and silica fume necessary to prevent the sulfuric acid and sulfate solution attack varied significantly depending on the type of sulfuric acid and sulfate solutions. * : Measured by MIP, which is expressed by cc per g of mortar ** : Determined by DSC-TG analysis, which is given by mass of mortar ( ) : Ratio of pore volume larger than 0.1 I.tm to total pore volume, %

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Effects of sodium sulfate concentration
Effects of sodium sulfate concentration on the sulfate resistance of mortars with and without silica fume
✍ Fevziye Aköz; Fikret Türker; Sema Koral; Nabi Yüzer 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 716 KB

An investigation was carried out on the effect of sodium sulfate concentration on the sulfate resistance of mortars. Experiments were carried out on the RILEM portland cement standard mortars and portland cement-silica tie mortars. Sulfate exposure of mortars were initiated after 28 days of lime sat

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A reply to a discussion by O. S. B. Al-Amoudi of the paper “a microstructural study of the effect produced by magnesium sulfate on plain and silica fume-bearing portland cement mortars”
✍ David Bonen 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 109 KB

I am most thankful to Dr. A1-Amoudi for providing data supporting my findings. Evidently, in light of the increase in the use of silica fume concrete, any contribution to the performance of cementitious systems containing silica fume in an aggressive environment is highly commended, as this issue is