A Review on Fly Ash as a Raw Cementitious Material for Geopolymer Concrete

2018 ◽  
Vol 69 (7) ◽  
pp. 1661-1667 ◽  
Author(s):  
Aissa Bouaissi ◽  
Long Yuan Li ◽  
Ligia Mihaela Moga ◽  
Ioan Gabriel Sandu ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
...  
Keyword(s):  
Fly Ash ◽  
Physical Properties ◽  
Review Paper ◽  
Chemical Activation ◽  
Solid Wastes ◽  
Mix Design ◽  
Chemical Compositions ◽  
Materials Used ◽  
By Products ◽  
Made In

This paper presents a review on fly ash as prime materials used for geopolymer. Due to its advantages of abundant resources, less in cost, great workability and high physical properties which lead to achieve high mechanical properties. Fly ash is considered as one of the largest generated industrial solid wastes or so-called industrial by products, around the world particularly in China, India and USA. The characteristics of fly ash allow it to be a geotechnical material to produce geopolymer cement or concrete as an alternative of Ordinary Portland cement. Many efforts are made in this direction to formulate a suitable mix design of fly ash based-geopolymer by focusing on fly ash as the main prime material. The physical properties, chemical compositions and chemical activation of fly ash are analysed and evaluated in this review paper. Reference has been made to different ASTM, ACI standards and other researches work in geopolymer area.

scholarly journals Fly Ash as a Cementitious Material for Concrete

2020 ◽  
Author(s):  
Aissa Bouaissi ◽  
Long Yuan Li ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Romisuhani Ahmad ◽  
Rafiza Abdul Razak ◽  
...  
Keyword(s):  
Fly Ash ◽  
Physical Properties ◽  
Ordinary Portland Cement ◽  
Chemical Activation ◽  
Solid Wastes ◽  
Chemical Compositions ◽  
The World ◽  
Geopolymer Cement ◽  
Materials Used ◽  
By Products

This paper presents a review on fly ash as prime materials used for geopolymer. Due to its advantages of abundant resources, less in cost, great workability and high physical properties, fly ash leads to achieving high mechanical properties. Fly ash is considered as one of the largest generated industrial solid wastes or so-called industrial by-products, around the world particularly in China, India, and USA. The characteristics of fly ash allow it to be a geotechnical material to produce geopolymer cement or concrete as an alternative of ordinary Portland cement. Many efforts are made in this direction to formulate a suitable mix design of fly ash-based geopolymer by focusing on fly ash as the main prime material. The physical properties, chemical compositions, and chemical activation of fly ash are analyzed and evaluated in this review paper. Reference has been made to different ASTM, ACI standards, and other researches work in geopolymer area.

scholarly journals Compressive Strength Development of Geopolymer Mortar by Utilization Slag and Fly Ash Mixtures

2019 ◽  
Vol 9 (2) ◽  
pp. 4066-4069
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Solid Material ◽  
Solid Wastes ◽  
Strength Development ◽  
Solid Materials ◽  
Compressive Strength Development ◽  
Alkaline Activator ◽  
Materials Used ◽  
Made In

The paper displays the use of two base solid wastes materials to produce the alkaline-activated binder mortar to reduce the CO2 emission on climate change. The solid materials used in this research were slag and fly-ash to improve the compressive strength (CS) of alkaline activated mortar (AAM). The output AAM of 7 trial mixes were designed with different combinations of slag and fly ash. The mixes combinations were made in ratios of (100:0), (90:10), (80:20), (70:30), (50:50), (25:75), and (0:100), respectively. The combination of 10 M NaOH and Na2SiO3 was used as alkaline activator (AA). The wt. ratio of Na2SiO3 to NaOH = 2.5, and wt. ratio of AA to solid material = 0.52. The samples of AAM were cured at 75°C for 24 h. Among all the 7 trial mixtures, it was found that mixture with a combined ratio of slag:fly ash of 25:75 produce the maximum CS at 28 days of 88.87 MPa. Therefore, the alteration percentage of SiO2 and Al2O3 derived from fly ash in combination with CaO derived from slag contributed to significant CS improvement due to the formation of (N-A-S-H), (C-S-H) and (C-(A)-S-H) gels. The result observed of gel binder formation was confirmed by XRD and FESEM analyses.

Viability of Some Kano-Nigerian Clays for Refractory Applications

2013 ◽  
Vol 315 ◽  
pp. 477-481 ◽  
Author(s):  
I.A. Rafukka ◽  
B. Onyekpe ◽  
Y. Tijjani
Keyword(s):  
Compressive Strength ◽  
Physical Properties ◽  
Bulk Density ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Linear Shrinkage ◽  
Chemical Compositions ◽  
Shock Resistance ◽  
Materials Used ◽  
Refractory Bricks

The physical properties of some materials used by local foundries were investigated with a view to assessing their suitability for use as low heat duty refractory bricks. The samples were collected from Malamai village, Gezawa Local Government, Kano state; they are Gezawa clay and Burji (Clay). The samples were crushed, ground, sieved and the chemical compositions were determined. The clay samples were treated separately as well as blended with Gezawa clay in different proportions and molded in to bricks. The bricks were dried and fired to 1100. Test for refractoriness, thermal shock resistance, linear shrinkage; bulk density, porosity and compressive strength were carried out on each of the specimen. Burji blended with 50% to 90% Gezawa clay gave improved thermal shock resistance with a refractoriness of 1300 and hence could be used for non ferrous melting cupolas.

Study on Fly Ash Based Geopolymer for Coating Applications

2013 ◽  
Vol 686 ◽  
pp. 227-233 ◽  
Author(s):  
Mustafa Al Bakri Abdullah Mohd ◽  
Liyana Jamaludin ◽  
Kamarudin Hussin ◽  
Mohammed Binhussain ◽  
Che Mohd Ruzaidi Ghazali ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Thermal Properties ◽  
Fly Ash ◽  
Ordinary Portland Cement ◽  
Mix Design ◽  
Chemical Compositions ◽  
Curing Conditions ◽  
Alumino Silicate ◽  
Alkaline Activator ◽  
Cementitious Systems

Geopolymer is cementitious binders that do not require the presence of ordinary Portland cement (OPC). Fly ash with geopolymer formulations prepared with mixing alumino-silicate with the alkaline activator solution has been applied as protective coating material that suitable for high temperature applications such as fire resistant panel. Geopolymer coating samples were cured at 70 °C for 24 hours before sintered using temperatures range from 600 °C to 1500 °C in order to increase strength and improve thermal properties. Curing conditions also have a significant effect on the development of mechanical strength in most cementitious systems. The chemical compositions, microstructure and FTIR were studied. Geopolymer coating samples cures to a glassy texture and effectively used to create a resistant surface. Fly ash geopolymer coating was improved the compressive strength of the coatings materials as high as 40 MPa. This technology develop a geopolymeric mix design that superior use as cementitious coatings with high thermal application.

scholarly journals Influence of fly ash addition on physical-mechanical properties of clay bricks – literature review

2021 ◽  
Vol 1209 (1) ◽  
pp. 012046
Author(s):  
I Vrdoljak
Keyword(s):  
Fly Ash ◽  
Literature Review ◽  
Review Paper ◽  
Construction Materials ◽  
Waste Material ◽  
Waste Materials ◽  
Clay Brick ◽  
Clay Bricks ◽  
The Past ◽  
By Products

Abstract During the past years, due to the increase in the number of people and the increasing degree of industrialization, the amount of by-products produced, the so-called waste materials are becoming larger. As this problem grows with age, attempts are being made to find answers to the questions of how to use waste material purposefully in order to reduce the problem of disposing of large quantities of this type of material. One way to reduce the accumulation of waste material is to use it in construction materials. This literature review paper presents the research of the area dealing with the influence of fly ash application on properties of clay brick. The application of fly ash at various percentages in relation to the mass of clay and the influence of fly ash at different firing temperatures are studied.

scholarly journals Parametric Study on Eco-Friendly Bricks

10.29007/dskr ◽  
2018 ◽  
Author(s):  
Bhavin Dhonde ◽  
Vijay R. Panchal ◽  
Dr. Janki Thakker
Keyword(s):  
Fly Ash ◽  
Rice Husk ◽  
Parametric Study ◽  
Waste Materials ◽  
Waste Products ◽  
The World ◽  
By Products ◽  
Made In

Every year about 1.3 trillion bricks are manufactured in, and the world of which at least 10% are made in coal fired kilns, releasing about 800 million tons of CO2 annually. Eco-friendly bricks help to reduce the emission of CO2 in environment. Another aspect is to utilize waste materials and by products such as fly-ash, rice-husk, chopped straw etc., which are cheaper and easily available. These materials should help to achieve better properties for bricks. Another aim is to reduce the shrinkage problem in present eco-friendly bricks by adding waste products and increase in the strength and serviceability of present eco-friendly bricks. In this study we utilize different materials with varying percentage to produce eco-friendly bricks with improved properties. Shrinkage of the present eco- friendly bricks was reduced by adding rice-husk (RH) and chopped-straw (CS). The highest strength of the brick was achieved.

scholarly journals Sustainable Green Concrete by using Biomass Aggregate

2020 ◽  
Vol 18 (1) ◽  
pp. 31-37
Author(s):  
Flora Anak Albert Daud ◽  
Tang Hing Kwong ◽  
Chai Teck Jung
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Chemical Properties ◽  
Mix Design ◽  
Partial Replacement ◽  
Strength Development ◽  
Major Contributor ◽  
Green Concrete ◽  
Natural Aggregate ◽  
Made In

The use of concrete for construction had become very common in developing countries. But concrete is not friendly environment because of it consumes huge quantities of natural materials and production of the cement, which is a major contributor to greenhouse gas emissions and global warming. The aim of this study is to investigate the Sustainable Green Concrete (SGC) which containing biomass aggregate; fly ash and Superplasticizer. Biomass aggregate and fly ash are waste industry products which are environmentally friendly. The study was carried out to identify the chemical properties of biomass aggregate, and to determine the chemical properties and optimum mix design of the Sustainable Green Concrete (SGC). A total of 90 cube samples were casted and compressive strength were tested at the age of 7, 14 and 28 days. The overall results showed that the workability and compressive strength were decreased with the increase of the replacement of natural aggregate with biomass aggregate. Besides that, the workability and compressive strength was increased with the incorporation with the replacement cement by fly ash. The SGC gained highest compressive strength for the concrete mixes of 39.3 N/mm2 with the optimum percentage used of SGC in producing concrete not exceeding 30% biomass aggregate and 6% of fly ash as a partial replacement with natural aggregate and cement respectively. The results obtained and observation made in this study suggested that biomass aggregate and fly ash are successfully used as partial replacement in producing SGC and can perform better strength development.

WIELAND-SW1

Alloy Digest ◽  
2015 ◽  
Vol 64 (9) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Lead Free ◽  
Made In

Abstract Wieland-SW1 is a lead-free special brass made in extruded and drawn products. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: Cu-841. Producer or source: Wieland Metals Inc. and Wieland-Werke AG.

MULTIMET (N-155)

Alloy Digest ◽  
1961 ◽  
Vol 10 (12) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Heat Treating ◽  
Age Hardening ◽  
Nickel Chromium ◽  
Cobalt Nickel ◽  
Temperature Performance ◽  
High Oxidation ◽  
Scaling Resistance ◽  
Made In

Abstract MULTIMET alloy is cobalt-nickel-chromium-iron austenitic alloy having high oxidation and scaling resistance along with good high-temperature properties. It tends to work harden but does not respond significantly to age-hardening. It is made in a wrought grade (0.08-0.16% carbon) and a casting grade (0.20% max. carbon). This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SS-28. Producer or source: Haynes Stellite Company. Originally published May 1955, revised December 1961.

ZIRCADYNE 706

Alloy Digest ◽  
1983 ◽  
Vol 32 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Heat Exchangers ◽  
Heat Treating ◽  
Chemical Compositions ◽  
Chemical Processing ◽  
Lower Oxygen ◽  
Panel Type

Abstract ZIRCADYNE 706 is a zirconium-niobium (columbium) alloy containing 2-3% niobium. It is similar in chemical compositions (except for slightly lower oxygen) to Zircadyne 705 (Alloy Digest Zr-8, July 1982). Zircadyne 706 was developed specifically for severe forming applications such as panel-type heat exchangers. The corrosion resistance of Zircadyne 706 is identical to that of Zircadyne 705 but its tensile and yield strengths are slightly lower. It is recommended for chemical processing applications. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Zr-10. Producer or source: Teledyne Wah Chang Albany.

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