Abstract
Sugarcane is one of the main cash crop grown in around 115 countries. The waste produced after its use as raw material is dumped on open lands. Detail estimation of sugarcane bagasse ash (SCBA) production on basis of sugarcane production all over as well as mainly in India is carried out in this study. Use of SCBA as a supplementary cementitious material adds sustainability to concrete by reducing the CO2 emission during cement production. The positive effects of SCBA as a partial replacement of cement on the mechanical properties of concrete are recognized through different researches; however, the overall improvement depends on the durability properties of SCBA in cementitious medium. In this study, durability properties of conventional concrete utilizing SCBA sourced from sugar factory site have been investigated. Concrete mixtures with SCBA content ranging from 0% to 30% of total binder were used. The compressive strength, ultrasonic pulse velocity and loss in weight of the concrete specimens were determined after exposure to sodium hydroxide solution. The reactivity of alkali with mixes containing SCBA in terms of expansion was determined by accelerated as well as Indian standard test method. The results demonstrated that incorporation of SCBA as partial replacement of cement improved the resistance to alkali attack on concrete. The SCBA in cement aggregate mix showed reduction in expansion proving the effectiveness of waste SCBA inclusion in cementitious medium.
Highlights
Concrete has become a part and partial of overall development in terms of social and economic aspects
The present study aims at checking the effect of replacing cement by sugarcane bagasse ash (SCBA) on properties of concrete exposed to sodium hydroxide
The maximum loss in weight was observed with 0% and 30% SCBA content mixes for all alkali exposure period conditions.The minimum loss in weight was observed with 15% SCBA content at 7d, 28d and 56d exposure period
Summary
Concrete has become a part and partial of overall development in terms of social and economic aspects. Increase in concrete consumption is forcing in increase of cement production. Cement manufacturing hampers the environment in respect of CO2 emission, depletion of natural resources which has become a challenge in front of researchers. Many developing and developed countries has regularized use of pozzolanic materials in portland cement on account of achieving control on environmental issues and improving quality of concrete mainly the durability apsect. Utilization of agricultural, industrial and agro- industrial by-products in concrete production has become an attractive area to the researchers worldwide. Utilization of such wastes as cement replacement materials as mineral admixture can reduce the cost of concrete and minimize the negative environmental effects associated with the disposal of these wastes. Rice husk ash, fly ash, metakaolin and ground granulated blast furnace slag are well established pozzolans because of high silica contents in their chemical composition [1,2,3,4,5]
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