EFFECTS OF LOCAL CHEMICAL MINERALOGY ON THE LONG TERM DURABILITY OF REINFORCED CONCRETE STRUCTURES - EFFECTS OF CALCIUM CARBONATE:AN INDIAN PERSPECTIVE USING XRF
IR@NPL: CSIR-National Physical Laboratory, New Delhi
View Archive Info| Field | Value | |
| Title |
EFFECTS OF LOCAL CHEMICAL MINERALOGY ON THE LONG TERM DURABILITY OF REINFORCED CONCRETE STRUCTURES - EFFECTS
OF CALCIUM CARBONATE:AN INDIAN PERSPECTIVE USING XRF
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| Creator |
Karar, N.
Singh, S. K. |
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| Subject |
Engineering (General)
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| Description |
Analyses of chemical constituents in sand were undertaken
after these sand samples were collected from different sources,
including river sand and manufactured sand from all over India,
ensuring a fair representation. Indian subcontinent is home to
20% of the worlds’ population. X-Ray Fluorescence (XRF) results
along with data from X-Ray diffraction suggested that Indian
sand is not necessarily pure silica based sand but all most always
has calcium carbonate as a constituent. Its content varied from a
few percent to majority fraction of the sand at certain locations.
This can chemically react with acidic ground water (hard water)
and make any exposed concrete porous and susceptible to
further degradation based on capillary action. As calcium salts
like carbonate was present in non-negligible amounts, such sand
samples need to be leached with dilute acids and such content
removed to make the sand chemically more stable before
mixing with cement for production of reinforced concrete, for
better durability even in slightly acidic environments with nonpotable
ground water or in areas close to the sea coast or areas
with tidal effects.
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| Publisher |
Indian Concrete Journal
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| Date |
2019-02
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/4017/1/N.%20Karari_R3.pdf
Karar, N. and Singh, S. K. (2019) EFFECTS OF LOCAL CHEMICAL MINERALOGY ON THE LONG TERM DURABILITY OF REINFORCED CONCRETE STRUCTURES - EFFECTS OF CALCIUM CARBONATE:AN INDIAN PERSPECTIVE USING XRF. The Indian Concrete Journal. pp. 58-64. ISSN 0019-4565 |
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| Relation |
http://npl.csircentral.net/4017/
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