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Indian Journal of Engineering and Materials Sciences (IJEMS) >
IJEMS Vol.19 [2012] >
IJEMS Vol.19(5) [October 2012] >
| Title: | Sulphuric acid resistant ecofriendly concrete from geopolymerisation of blast furnace slag |
| Authors: | Rajamane, N P
Nataraja, M C
Lakshmanan, N
Dattatreya, J K
Sabitha, D |
| Keywords: | Geopolymer
Sulphuric acid
Portland pozzolana cement
Fly ash
Blast furnace slag powder
Sodium hydroxide
Sodium silicate |
| Issue Date: | Oct-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | In this study, geopolymer is prepared from
‘ground granulated blast furnace slag’ (GGBS)–a powder from grinding the
by-product of slag waste from blast furnace of steel plants. For comparison,
conventional cement, Portland pozzolana cement (PPC) containing fly ash was
considered. To achieve simultaneous acidic and sulphate attack, sulphuric acid
is used for durability studies. The test data indicate that on exposure to 2%
and 10% sulphuric acids, the losses in weight, thickness and strength of
geopolymer concrete (GPC) are significantly much less than those for Portland
pozzolana cement concrete (PPCC). The GPCs have inorganic polymers of
alumino-silicates as binder, generally without any free lime. Therefore, GPCs
resist acid attack better than free lime containing conventional concretes
containing Portland cement. The binding action in GPC is through
geopolymerisation of GGBS using alkaline activator solution (AAS) made of
sodium hydroxide and sodium silicate solutions. The geopolymer eliminates use
of Portland cement in structural concretes by utilizing the industrial
by-product GGBS, thereby reducing considerably the carbon footprint measured by
‘embodied energy’ and ‘embodied carbon’, i.e., ‘CO2e emission’ of
concrete. |
| Page(s): | 357-367 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Source: | IJEMS Vol.19(5) [October 2012]
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