Mechanical and durability properties of fly ash geopolymer concrete containing recycled coarse aggregates

Environmental and economic factors increasingly encourage higher utility of industrial by-products. The basic objective of this study was to identify alternative source for good quality aggregates which is depleting very fast due to fast pace of construction activities in India. EAF oxidizing slag as a by-product obtained during the process in steel making industry provides great opportunity to utilize it as an alternative to normally available coarse aggregates. The primary aim of this research was to evaluate the physical, mechanical, and durability properties of concrete made with EAF oxidizing slag in addition to supplementary cementing material fly ash. This study presents the experimental investigations carried out on concrete grades of M20 and M30 with three mixes: (i) Mix A, conventional concrete mix with no material substitution, (ii) Mix B, 30% replacement of cement with fly ash, and (iii) Mix C, 30% replacement of cement with fly ash and 50% replacement of coarse aggregate with EAF oxidizing slag. Tests were conducted to determine mechanical and durability properties up to the age of 90 days. The test results concluded that concrete made with EAF oxidizing slag and fly ash (Mix C) had greater strength and durability characteristics when compared to Mix A and Mix B. Based on the overall observations, it could be recommended that EAF oxidizing slag and fly ash could be effectively utilized as coarse aggregate replacement and cement replacement in all concrete applications.

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Mechanical and Durability Properties of Fly Ash Geopolymer Concrete with Silica Fume

Journal of The Institution of Engineers (India) Series A ◽

10.1007/s40030-019-00400-z ◽

2019 ◽

Vol 100 (4) ◽

pp. 697-705 ◽

Cited By ~ 2

Author(s):

Sanghamitra Jena ◽

Ramakanta Panigrahi ◽

Pooja Sahu

Keyword(s):

Fly Ash ◽

Silica Fume ◽

Geopolymer Concrete ◽

Durability Properties

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Fly ash-based eco-friendly geopolymer concrete: A critical review of the long-term durability properties

Construction and Building Materials ◽

10.1016/j.conbuildmat.2020.121857 ◽

2021 ◽

Vol 270 ◽

pp. 121857

Author(s):

Mugahed Amran ◽

Solomon Debbarma ◽

Togay Ozbakkaloglu

Keyword(s):

Fly Ash ◽

Critical Review ◽

Geopolymer Concrete ◽

Durability Properties

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Strength Assessment on Geopolymer Concrete using Ceramic Waste Powder and M-Sand

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.a8125.1110120 ◽

2020 ◽

Vol 10 (1) ◽

pp. 95-100

Keyword(s):

Fly Ash ◽

Ceramic Powder ◽

Source Material ◽

Fine Aggregate ◽

Geopolymer Concrete ◽

Polypropylene Fibres ◽

Strength Assessment ◽

Ceramic Waste ◽

Durability Properties ◽

Strength And Durability

The use of abundantly available wastes such as Fly ash and ceramic powder in construction industry in the form of geopolymer concrete turns out to be the search of a very promising building material for a sustainable future[15].This study has been undertaken to investigate the strength and durability properties of geopolymer concrete by adding ceramic powder in different percentage as source material in addition with flyash[16]. All investigations are mainly focused towards geopolymer concrete mainly with flyash as source material. In this study, ceramic waste powder is added since it is also one of the major waste material as flyash. Nowadays, almost all the construction are carried out with ceramic products which results with more ceramic waste powder. Thus this work focused to utilize this waste powder into geopolymer concrete. Characteristic strength and primary durability properties are carried out by adding ceramic powder with 50%,40% and30% with fly ash. Thus this paper focuses on varying the proportions of fly ash and ceramic waste powder (50:50, 60:40, 70:30) in geopolymer concrete incorporating with polypropylene fibres in percentage of 0.5%,0.75% and 1% in volume of concrete to evaluate its strength and durability characteristics. The alkaline activator solution used is a mixture of 10 molar Sodium hydroxide and Sodium silicate in the ratio 1:3. Ambient curing condition is applied for the specimens. M-Sand is used instead of fine aggregate, since many literature reveals addition of M-Sand gains more strength in geopolymer Concrete.

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Effect of Micro Polypropylene Fibre on the Performance of Fly Ash-Based Geopolymer Concrete

Journal of Applied Engineering Sciences ◽

10.2478/jaes-2019-0013 ◽

2019 ◽

Vol 9 (1) ◽

pp. 97-108

Author(s):

Manoj Rajak ◽

Baboo Rai

Keyword(s):

Fly Ash ◽

Portland Cement ◽

Mechanical Performance ◽

Polypropylene Fibre ◽

Fibre Reinforcement ◽

Geopolymer Concrete ◽

Split Tensile Strength ◽

Polypropylene Fibres ◽

Durability Properties ◽

Geopolymer Composites

Abstract Geopolymer offers significant promise to the construction world as a possible alternative to ordinary Portland cement (OPC). Like conventional Portland cement concrete, the matrix brittleness in geopolymer composites can be reduced by introducing suitable fibre reinforcement. A few investigations on fibre reinforced geopolymer composites are available. However there is still a gap to comprehend and enhance their performance. This paper describes the effect of incorporating micro polypropylene fibres on the strength and durability characteristics of geopolymer concrete. The engineering and durability properties like workability, compressive strength, split tensile strength, flexural strength, modulus of elasticity, and sorptivity of geopolymer concrete reinforced with micro polypropylene fibres is presented. The effect of the sulfuric acid attack on Geopolymer Concrete reinforced with micro polypropylene fibres is also discussed. The results show that hydrophobic characteristics of the micro polypropylene fibre led to weak contact with the geopolymer binder and hence weakened the mechanical performance of the fly ash based geopolymer matrix. However significant improvements in durability properties were noted.

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