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| Title: | EFFECT OF BAGASSE ASH AS A SUPPLEMENTARY CEMENTITIOUS MATERIAL ON PROPERTIES OF STRUCTURAL CONCRETE |
| Authors: | BHAWANI, A |
| Keywords: | Cementitious Material
Strength
Bagasse Ash
Pozzolana
Concrete
Energy-dispersive X-ray Spectroscopy
Xray Diffraction
2017
M.Tech Thesis
CSIR-CBRI |
| Issue Date: | 31-Jul-2017 |
| Abstract: | Bagasse ash (BA), the residue obtained after the burning of sugarcane bagasse as a fuel,
has pozzolanic properties with potential use as a supplementary cementitious material
(SCM). Use of bagasse ash (BA) as a mineral admixture needs to be established, especially
in India, where sugarcane cultivation is widespread, to reduce land required for its disposal
and cement consumption in construction industry. Hence, to encourage commercial use of
BA with minimum processing, an evaluation of the physical, chemical and morphological
characteristics of a locally available BA and its effect, as SCM, on properties of structural
concrete was taken up.
Experimental investigations included evaluation of compressive strength, flexural strength,
and split tensile strength of BA concrete with three different w/c ratios (0.35, 0.42 and 0.5)
corresponding to high and normal strength concrete mixes. The amount of bagasse ash
used in the concrete mix varied from 10% to 30% by weight of cement in original OPC
concrete mix. In addition, BA influence on elastic modulus, and microstructure of concrete
was also investigated. Bagasse ash was found to be amorphous in nature and finer than
cement after thermal treatment based on thermo gravimetric analysis. A rational method to
get ‘optimum replacement level’ (ORL) of BA, for which maximum compressive strength
is obtained at a w/c ratio, has been proposed and verified with experiments. Cement
substitution with BA when water content, coarse aggregate amount and super plasticizer
dosage remained the same as in control mixes, improved the strength of concrete till ORL.
Maximum increase in compressive; split tensile and flexural strengths of BA concrete
compared to those of the respective cement concrete mixes were found to be in the range
of 16-57%, 43-75% and 39-44% respectively depending on w/c ratio. A simple method to
get the mix proportions of BA concrete for target strength has been described and the same
has been found to give satisfactory results. |
| Description: | Thesis Submitted to AcSIR for the Award of
the Degree of
MASTER OF TECHNOLOGY
in
BUILDING ENGINEERING AND DISASTER MITIGATION |
| URI: | http://hdl.handle.net/123456789/1636 |
| Appears in Collections: | M.Tech Thesis
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