A comprehensive review on coal fly ash and its application in the construction industry

Kelechi, Sylvia E.; Adamu, Musa; Uche, Okorie Austine; Okokpujie, Imhade P.; Ibrahim, Yasser E.; Obianyo, Ifeyinwa Ijeoma

doi:10.1080/23311916.2022.2114201

Cited by 40 publications

(22 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the considerable amount of cementitious compound that was formed due to a greater reaction between the BLA and the cement-treated soil, the micrograph's pores were comparatively small. The holes were comparatively smaller and only partially filled with cementitious material [30][31][32][33].…”

Section: Soil Microstructure Analysis Using Diffraction Of X-raysmentioning

confidence: 98%

Experimental Analysis of the Strength and Microstructural Effects of Rice Husk Ash and Bamboo Leaf Ash on Cement-treated Lateritic Soil

Nnochiri,

Okokpujie,

Tartibu

2023

IJDNE

View full text Add to dashboard Cite

The two most often utilized binders in soil stabilization projects are lime and Portland cement, but this process has a high rate of carbon emission. However, research on soil stability through the use of cleaner materials and environmentally friendly binders with a lower carbon footprint has garnered a lot of attention in recent years due to the significant carbon emissions in cement manufacturing. In this study, the strength and microstructural characteristics of lateritic soil stabilized with bamboo leaf ash (BLA) and rice husk ash (RHA) were examined. The soil sample underwent preliminary examinations and California bearing ratio tests as part of the testing process (CBR). The soil sample was then individually mixed with BLA and RHA at 2% intervals in proportions of 0-16%, as well as cement in variable proportions of 0-12% at 2% intervals. The blends were tested for CBR at each stage. The greatest values for unsoaked and soaked CBR at 8% cement +8% RHA were 92.3% and 70.2%, and 90% and 62.2%, respectively, at 8% cement +8% BLA for soaked and unsoaked CBR. SEM and X-ray diffraction (XRD) tests were performed on samples that had reached these ideal CBR levels. According to the results, new compounds were created and the microstructural layouts changed. Therefore, it may be inferred that the stabilization process involved pozzolanic and cement hydration reactions.

show abstract

Section: Soil Microstructure Analysis Using Diffraction Of X-raysmentioning

confidence: 98%

Experimental Analysis of the Strength and Microstructural Effects of Rice Husk Ash and Bamboo Leaf Ash on Cement-treated Lateritic Soil

Nnochiri,

Okokpujie,

Tartibu

2023

IJDNE

View full text Add to dashboard Cite

show abstract

“…), in the construction of concrete dams with RCC (rolling concrete) technology, in the construction of rigid pavements, self-compacting concretes, in tunnel cladding, in cementing, in the production of ready-made mortars and in the manufacture of utilitarian objects (pots, etc.). It can also be applied in soil treatment and stabilization, in the production of synthetic zeolites, in road construction (for the construction of embankments, bases and bases and as a component of asphalt concrete) and in waste management facilities for the absorption of toxic elements [39,40].…”

Section: The Selected Non-energy Uses Of Lignitementioning

confidence: 99%

The Emergence of Non-Energy Uses of Coal and the Future of Lignite Mining in a Region of Low Carbon Footprint, a Case Study

2023

View full text Add to dashboard Cite

The rapid development of renewable energy sources, which has been going on for the last two decades, allows now the elimination of the coal use for power generation. Nevertheless, coal will continue to be used in key-industrial sectors, such as steel and cement production, which are crucial for maintaining the living standards of modern society. The future remains doubtful for coals of poor quality characteristics, such as lignite, which is used almost exclusively for power generation purposes. The present study aims to show that, even in the case of lignite, the transition to a zero-carbon economy must be decoupled from the mines closure. In this context, a combined SWOT–AHP analysis was conducted in order to compare seven potential non-energy uses of the lignite produced in the mines of Western Macedonia region, based on six criteria that are in line with the framework set by the European Union for the selection of the best technologies for every site-specific case. This comparison showed that the most promising technologies are related to the production of organic fertilizers and soil amendments, raw materials and products for the construction industry, activated carbon, and graphene. These technologies may contribute to the achievement of socioeconomic and environmental targets that are critical for the just transition of Western Macedonia region to a new, sustainable productive model.

show abstract

“…Moreover, according to the conducted analyses, the estimated amount of production of these materials may in the early thirties of the 21-st century reach the value of 2100 million tons per year [76]. In addition, it should be noted that currently the two main countries of FA generation in the world-with production of 112 and 100 million tons respectively-are India and China [77].…”

Section: Introductionmentioning

confidence: 99%

Examination of water absorption of low volume fly ash concrete (LVFAC) under water immersion conditions

Golewski

2023

Mater. Res. Express

View full text Add to dashboard Cite

The studies were carried out to find a relation between important physical property and the main mechanical parameter of concretes containing fly ash (FA) in order to develop indications for the production of durable composites with the addition of this waste. The tests included low volume fly ash concrete (LVFAC). The cements used in the studies were following: ordinary Portland cement (OPC), (FA-00) and two blended Portland cements containing FA in the amount of: 20%, (FA-20) and 30% (FA-30). Measurements of water adsorption (wa) by immersion and compressive strength (fcm) of analysed composites have been performed. The methodology of the wa tests was to reflect the conditions prevailing in the case of concrete- and reinforced concrete structures operating below the water table. The microstructure of all three materials was also assessed. Test results indicated that LVFAC mixes developed 28-day fcm between 45.10 for FA-30 to 48.96 MPa for FA-20 with a value of 47.51 MPa for the reference concrete. Neverless wa of LVFAC mixes decreased with the increase in FA content. The average values of wa was 4.6% for FA-30 and 5.3% for FA-20, respectively, while for concrete without FA it was 5.0%. Thus, it was found that wa by immersion was inversely proportional to the fcm. Based on the microstructural studies it was found that this behavior is attributed to reduced pore diameters and densification of cement matrix microstructure in FA-30 concrete. On the other hand concrete of series FA-20 showed a loose and porous microstructure, and wa in this composite increased accordingly. It can be stated that, the LVFAC containing 30% FA may increase durability of reinforced concrete structures subjected to immersion conditions.

show abstract

A comprehensive review on coal fly ash and its application in the construction industry

Cited by 40 publications

References 72 publications

Experimental Analysis of the Strength and Microstructural Effects of Rice Husk Ash and Bamboo Leaf Ash on Cement-treated Lateritic Soil

Experimental Analysis of the Strength and Microstructural Effects of Rice Husk Ash and Bamboo Leaf Ash on Cement-treated Lateritic Soil

The Emergence of Non-Energy Uses of Coal and the Future of Lignite Mining in a Region of Low Carbon Footprint, a Case Study

Examination of water absorption of low volume fly ash concrete (LVFAC) under water immersion conditions

Contact Info

Product

Resources

About