Investigation of coal bottom ash and fly ash in concrete as replacement for sand and cement

Rafieizonooz, Mahdi; Mirza, Jahangir; Salim, Mohd Razman; Hussin, Mohd Warid; Khankhaje, Elnaz

doi:10.1016/j.conbuildmat.2016.04.080

Cited by 437 publications

(191 citation statements)

References 14 publications

Supporting

Mentioning

165

Contrasting

Unclassified

Order By: Relevance

“…The reduction in strength for the CBA30 mix could be attributed to the porous and weaker particle of CBA compared to normal sand [15,16]. Reduction in compressive strength when CBA was used was also reported by Rafieizonooz et al [12]. On the other hand, due to the addition of SP in the CBA50 mix, increased compressive strength was observed.…”

Section: Compressive Strengthsupporting

confidence: 50%

“…CBA is part of coal ash which is the non-combustible material left in furnace of thermal power plants after burning of coal to generate power. In fact, about 1.7 million tons of CBA are produced in Malaysia [12]. CBA have been used as both structural fill and land filling materials on the empty lot adjoining thermal power plant sites over the years and has become an environmental menace to the surrounding.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Valorization of Wastes from Power Plant, Steel-Making and Palm Oil Industries as Partial Sand Substitute in Concrete

Ong

Jumaat

et al. 2017

Waste Biomass Valor

View full text Add to dashboard Cite

Section: Compressive Strengthsupporting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Valorization of Wastes from Power Plant, Steel-Making and Palm Oil Industries as Partial Sand Substitute in Concrete

Ong

Jumaat

et al. 2017

Waste Biomass Valor

View full text Add to dashboard Cite

“…In fact, most of the previous researchers used pre-soaked LWA as internal curing materials in expansive concrete [16,17]. Bottom ash, a by-product from coal combustion, is known as a porous material and is typically used as a replacement material for sand in concrete [18,19]. Bottom ash has the ability to retain water due to its high porosity.…”

Section: Introductionmentioning

confidence: 99%

Influence of Bottom Ashes with Different Water Retainabilities on Properties of Expansive Mortars and Expansive Concretes

Nguyen¹,

Saengsoy²,

Tangtermsirikul³

2019

View full text Add to dashboard Cite

This study investigates the influence of bottom ashes with different water retainabilities as an internal curing material on the performances of mixtures containing an expansive additive and fly ash. Two series of experiments were conducted: mortar containing expansive agent (expansive mortar) with a controlled w/b ratio and concrete containing expansive agent (expansive concrete) with a controlled initial slump. Test results indicate that workability of expansive mortar is improved due to retained water of bottom ash. Compressive strength of expansive mortar with bottom ash decreases. Total shrinkage of the expansive mortars, with a constant w/b, increases with the use of bottom ashes that have high water retainability in the condition of 7 days of water curing and then air curing. However, by using bottom ashes, compressive strength increases when the slump of the expansive concrete is controlled due to decrease of w/b ratio. The internal curing ability of bottom ashes leads to enhanced expansion of expansive mortars with sealed curing and expansive concretes with moist curing, reducing total shrinkage of expansive mortars with air curing. It was found by DTG analysis that expansive concretes with higher expansion containing bottom ash with higher water retainability had a higher amount of ettringite.

show abstract

“…This requires addition of other materials to conventional concrete to meet the required strength, durability and ecological aspects and this led to the need for search of additional materials. Various authors had carried out successful studies on use of different materials namely fly ash [4,5], rice husk ash [6], lead-zinc slag [7], waste glass powder [9], ceramic waste powder [10], silica fumes [11], polypropylene fibres [11], volcanic originated natural materials [12] etc., in concrete to improve strength and durability aspects as per required by the mega-infrastructure projects. Of these different materials, Red Brick dust is one such material which has potential for use in concrete making.…”

Section: Introductionmentioning

confidence: 99%

Red Brick Dust as a Partial Substitute to Cement in Conventional Concrete

Raju¹,

Reddy²,

Raju³

et al. 2019

IJRTE

View full text Add to dashboard Cite

In emerging countries like India, the government plans for mega-infrastructure projects for the development of the country. These projects involve construction of high-rise buildings and high-speed rail and road networks. These constructions require higher quantities of concrete, which is a combination of cement, fine and coarse aggregate. The manufacturing process of cement results in emission of CO2 , a pollutant which causes serious health hazards to living beings. The adverse effects are not only limited to posing threat to living beings, but also result in depletion of natural resources which are used as key ingredients in manufacturing cement. This mandates the need to search for cement replacing materials which maintain the same strength or improve the strength of conventional concrete. Red brick Dust is a highly siliceous waste material which is available near brick kilns or while dismantling buildings. Improper handling of red brick dust causes silicosis disease in human beings, when inhaled. Hence there is a need to dispose it off safely. It is reported by various researchers that red brick dust when used as an additive in concrete, improved the strength and durability aspects. Hence, in the present study, it is aimed to improve the compressive strength of conventional concrete by substituting cement partially with red brick dust in conventional concrete. The study has revealed that upon substituting cement with red brick dust, the compressive strength of conventional concrete is increased by about 13%. The present study reveals that red brick dust can be effectively used as a partial substitute to cement in conventional concrete thereby addressing the adverse effects of cement manufacturing and health hazards of improper disposal of red brick dust

show abstract

Investigation of coal bottom ash and fly ash in concrete as replacement for sand and cement

Cited by 437 publications

References 14 publications

Valorization of Wastes from Power Plant, Steel-Making and Palm Oil Industries as Partial Sand Substitute in Concrete

Valorization of Wastes from Power Plant, Steel-Making and Palm Oil Industries as Partial Sand Substitute in Concrete

Influence of Bottom Ashes with Different Water Retainabilities on Properties of Expansive Mortars and Expansive Concretes

Red Brick Dust as a Partial Substitute to Cement in Conventional Concrete

Contact Info

Product

Resources

About