EFFECT OF BAGASSE ASH AS A SUPPLEMENTARY CEMENTITIOUS MATERIAL ON PROPERTIES OF STRUCTURAL CONCRETE
IR@CBRI: CSIR-Central Building Research Institute, Roorkee
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| Creator |
BHAWANI, A
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| Date |
2017-07-31T04:48:40Z
2017-07-31T04:48:40Z 2017-07-31T04:48:40Z |
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| Identifier |
http://hdl.handle.net/123456789/1636
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| Description |
Thesis Submitted to AcSIR for the Award of
the Degree of
MASTER OF TECHNOLOGY
in
BUILDING ENGINEERING AND DISASTER MITIGATION
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. |
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| Language |
en
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| Subject |
Cementitious Material
Strength Bagasse Ash Pozzolana Concrete Energy-dispersive X-ray Spectroscopy Xray Diffraction 2017 M.Tech Thesis CSIR-CBRI |
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| Title |
EFFECT OF BAGASSE ASH AS A SUPPLEMENTARY CEMENTITIOUS MATERIAL ON PROPERTIES OF STRUCTURAL CONCRETE
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| Type |
Thesis
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