Effect of Sugarcane Bagasse Ash as Partial Cement Replacement on the Compressive Strength of Concrete

Abstract

The disposal of solid waste in open environment is a serious alarming concern that needs immediate attention from the researchers. The hazardous solid agro-industrial wastes which include: wheat straw ash, rice husk ash, corn cob ash and sugarcane bagasse ash (SCBA), having pozzolanic properties, have a versatile use in concrete. The solid pozzolana enhances the various concrete properties by the reaction of silicates with calcium hydroxide in the presence of water, which in result generate a saturated zone of calcium silicate hydrate (CSH) gel. This C-S-H gel reduces the amount of calcium hydroxide C(OH)2 during the hydration process of cement. Very limited research works have been done on concrete by partially replacing cement with SCBA. This research work was focused on evaluating the properties of concrete by partially replacing cement with SCBA at 0, 5, 10, and 15 percentages. Compressive strength, Strength activity index, and water absorption of all mixes were examined. And it was observed that all SCBA mixes showed an increase in compressive strength and at 10% replacement the strength activity index was at a peak of 115.67%, but all the SCBA mixes showed a strength activity index greater than 75% which satisfied the standard specification. The water absorption test for all SCBA mixes showed a slight increase in water absorption.

Mechanical properties and life cycle assessment of sugarcane bagasse and corn cob ashes‐based geopolymer concrete to promote circular economy

“…Similar observations were reported in the previous research studies, wherein SCBA addition resulted in a decrease in the slump of GGBFS based alkali‐activated concrete 86 . Apart from angular SCBA particles, higher water absorption capacity of SCBA has been consistently reported in the literature, which reduces the amount of water available to attain desired slump at constant water to binder ratio, thus lowering the workability 87,88 . It has also been reported that the decrease in slump could be attributed to the high specific surface area that reduces the flowability of the SCBA‐based concrete 89 .…”

“…86 Apart from angular SCBA particles, higher water absorption capacity of SCBA has been consistently reported in the literature, which reduces the amount of water available to attain desired slump at constant water to binder ratio, thus lowering the workability. 87,88 It has also been reported that the decrease in slump could be attributed to the high specific surface area that reduces the flowability of the SCBA-based concrete. 89 The differences in the impacts of CCA and SCBA on workability are due to their porosity and microstructure.…”

Effect of the Addition of Agribusiness and Industrial Wastes as a Partial Substitution of Portland Cement for the Carbonation of Mortars

“…It is known that SBA contain amorphous SiO 2 , which acts as a puzzolana reacting with Ca(OH) 2 produced during the hydration process of cement and water, acting as a retarding reaction, resulting into the generation of a saturated zone of calcium silicate hydrate (CSH) gel, selling porous and increasing compression resistance. This CSH gel reduces the amount of calcium hydroxide Ca(OH) 2 and consequently the pH of the cementitious paste [ 75 ]. Metakaolin (MK), Al 2 Si 2 O 7 , is a highly amorphous dehydration product of kaolinite, Al 2 (OH) 4 Si 2 O 5 ; it contains silica and alumina in an active form which will react with CH.…”

A Sustainable and Environmentally Friendly Concrete for Structural Applications

“…Sugarcane bagasse ash (SCBA) produced from cane sugar can also be used to replace a portion of cement in concrete. Moreover, the substitution of 10% of cement by SCBA increased the compressive strength of concrete by 15.67% [26].…”