I invite discussions from geologists and scientists; who are working on geochemical investigations of rocks and cement or lime-based construction materials.
Scope of the discussion:
- Geo-chemistry of weathering of artificial rock ‘concrete’
- Geo-chemistry of heritage mortars (including lime and Surkhi mortars)
- Investigations related to weathering and deterioration of siliceous rocks (including alkali silica reaction in concrete materials)
- Investigations related to weathering and deterioration of calcareous rocks (including alkali carbonate reaction in concrete materials)
Salient Points to Discuss:
- Methods of geochemical calculations
- Relevance of binary and ternary diagrams
- Number of ions - Formula on basis of 24 (O or OH) and their relevance, when and where to use?
- Number of ions - Formula on basis of 18 (O or OH) and their relevance, when and where to use?
- Number of ions - Formula on basis of 6 (O or OH) and their relevance, when and where to use?
- Number of ions - Formula on basis of 4 (O or OH) and their relevance, when and where to use?
- Number of ions - Formula on basis of any other equivalents; i.e., 22, 23, 2 (O or OH) and their relevance, when and where to use?
- Significance of addition and subtraction diagrams based above equivalents; to calculate possible cationic exchanges during weathering and or any other chemically and thermally hostile aggressive environments.
- Calculation of stable mineral assemblages
- Relevance of Rittmann Norm Method – Is this method can be used for all rocks, cement-based systems or for lime and Surkhi to study their changes in aggressive environments. What is the limitation Rittmann norm in this perspective?
- Suggestions on any other related and specific methods.
- What will be inference from a plot ‘X’ ions to ‘Y ions or vice versa. i.e.,
Examples: - (1) A plot of amount of Ca ions in X axis and Si ions in Y axis or vice versa. (2) Dolomite ions to Calcite ions. (3) Aluminum carbonate to silicon carbonate. (4) Carbonate ions to chloride or sulphate ions.
- What will be the inference from a plot of ratios or additions?
Examples: Correlation between Ca/CO2 and Si/Al
Correlation between Na+K and Ca/CO2
- Geochemistry of salt crystallization and gypsum formation in rocks, lime and cement-based materials.
- It will be highly appreciable if you could discus in addition to the state art information provided in the text book an introduction to the rock forming minerals by Deer et al. (1992), and Stable Mineral Assemblage of Igneous rock by Gottini et al. (1973).
- Discuss if anyone has codes/algorithms/excel books and programs written within this scope of geochemical investigations.
Thanks in advance.
Mohammed Haneefa Kolakkadan
Dear Mohammed Haneefa Kolakkadan ,
I think it should be to avoid the presence of toxic or radioactive substances in cement or building materials. And maybe it's different because it contains different geochemical components that cause the weathering of concrete.
Dear Liu... Thank you for the answer.... I am specifically looking for discussions related analysis.... possibly share your expertise in analysis.... Thanks in Advance.
Please find attached the link to our paper on the "Effect of mineral additions on prevention of alkali silica reaction in SSC - Effect of ..."
including graphs related to geochemical investigations.
Maybe it will help you in the discussion.
Best regards,
Guenter Grundmann
Conference Paper Effect of mineral additions on prevention of alkali silica r...
Dear Dr.Guenter Grundmann, Thank you very much for the answer and sharing your research with me. Possibly share more on weathering of lime or lime based materials.... Thanks in advance......
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