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.

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 Partial Replacement of Cement by Neem Leaves Ash and Fly Ash

2020 ◽  
Vol 9 (1) ◽  
pp. 506-508
Keyword(s):  
Experimental Investigation ◽  
Fly Ash ◽  
Ordinary Portland Cement ◽  
Construction Materials ◽  
Strength Properties ◽  
Vital Role ◽  
Partial Replacement ◽  
Cement Ratio ◽  
Neem Leaves ◽  
The World

Concrete is the most essential construction materials in all over the world. It is necessary to search the cheaply obtainable material as admixture which might be partially replaced cement in the production of concrete. This project is an experimental investigation of the neem leaves ash as partial replacement for cement also fly ash is used for partial replacement of cement. The neem leaves were dried, burnt and heated in the furnace to produce Neem leaves Ash, which was discovered to posses Pozzolanic properties.the ordinary Portland cement was replaced by neem ash by 5%,10%,15%,20% and 25% by weight also flash replaced by 15%,20%,25% and 30% the cubes were crushed to know the comparative strength of the concrete at different curing days. The last result showed that workability and strength properties of the concrete was depended on water cement ratio, total days of curing, the percentage of replacement of Neem leaves ash for OPC . I. This project it was noticed that the result of 5% NLA and 15% fly ash and 10% NLA and 20% of fly ash were gradually increasing the strength at 28 days. Neem leaves play a vital role and behaviour of Neem leaves ash and flash used concrete will be studied

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.

scholarly journals Rheodynamic Concrete as a Progressive Viability in the field of Concrete Technology

2020 ◽  
Vol 9 (3) ◽  
pp. 319-327
Keyword(s):  
Fly Ash ◽  
Rice Husk Ash ◽  
Construction Material ◽  
Working Environment ◽  
Construction Work ◽  
Self Compacting Concrete ◽  
Concrete Technology ◽  
The World ◽  
By Products ◽  
Safe Working

The most important material which is used for the construction of any concrete structure is concrete itself. It is considered to be as a versatile construction material as its properties can be changed by various means, with the help of different elements and as and when required. Rheodynamic Concrete or Self-Compacting Concrete is a special form of concrete which can easily flow into any kind of formwork uniformly, without facing the problem of bleeding and segregation, gives a better finish, has a great characteristic of placement, requires no vibration, and thus gives a safe working environment. Due to a number of merits, this type of concrete had becoming popular in the construction work. Simultaneously, the big industries across the world are producing the by products such as fly ash, rice husk ash, etc. Thus, this paper represents a review, which is done to incorporate these wastes by – products in Self-Compacting Concrete and observe, how the different properties of the same has been modified effectively and efficiently.

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 Utilization of Industrial By-Products/Waste to Manufacture Geopolymer Cement/Concrete

2021 ◽  
Vol 13 (2) ◽  
pp. 873
Author(s):  
Numanuddin M. Azad ◽  
S.M. Samindi M.K. Samarakoon
Keyword(s):  
Mechanical Properties ◽  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Industrial Waste ◽  
Cement Concrete ◽  
Granulated Blast Furnace Slag ◽  
Geopolymer Cement ◽  
Furnace Slag ◽  
By Products

There has been a significant movement in the past decades to develop alternative sustainable building material such as geopolymer cement/concrete to control CO2 emission. Industrial waste contains pozzolanic minerals that fulfil requirements to develop the sustainable material such as alumino-silicate based geopolymer. For example, industrial waste such as red mud, fly ash, GBFS/GGBS (granulated blast furnace slag/ground granulated blast furnace slag), rice husk ash (RHA), and bagasse ash consist of minerals that contribute to the manufacturing of geopolymer cement/concrete. A literature review was carried out to study the different industrial waste/by-products and their chemical composition, which is vital for producing geopolymer cement, and to discuss the mechanical properties of geopolymer cement/concrete manufactured using different industrial waste/by-products. The durability, financial benefits and sustainability aspects of geopolymer cement/concrete have been highlighted. As per the experimental results from the literature, the cited industrial waste has been successfully utilized for the synthesis of dry or wet geopolymers. The review revealed that that the use of fly ash, GBFS/GGBS and RHA in geopolymer concrete resulted high compressive strength (i.e., 50 MPa–70 MPa). For high strength (>70 MPa) achievement, most of the slag and ash-based geopolymer cement/concrete in synergy with nano processed waste have shown good mechanical properties and environmental resistant. The alkali-activated geopolymer slag, red mud and fly ash based geopolymer binders give a better durability performance compared with other industrial waste. Based on the sustainability indicators, most of the geopolymers developed using the industrial waste have a positive impact on the environment, society and economy.

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.

scholarly journals Experimental Examination on Blended Concrete by Incorporating GGBS and Fly ash

2019 ◽  
Vol 9 (2) ◽  
pp. 3725-3728
Keyword(s):  
Fly Ash ◽  
Co2 Emission ◽  
Bending Strength ◽  
Cementitious Materials ◽  
Industrial Wastes ◽  
Mineral Admixtures ◽  
Experimental Examination ◽  
Split Tensile Strength ◽  
The World ◽  
By Products

Concrete is the highly used building material around the world. Tons of CO2 is evolved during manufacturing process of cement. This CO2 emission has massive effect on nature and to reduce it blended concrete has been used. Now days, use of cementitious materials are increasing rapidly. Blended concrete is the concrete in which cement is mixed with different proportions of mineral admixtures such as GGBS, silica fume, fly ash etc. In present study, partially replacing of cement with Fly ash and GGBS with three different proportions. Fly ash and GGBS are by-products from coal and iron industries. Here, M40 grade control concrete which is 0% replacement of cement and Blended concrete with 3 different combinations. Both the results will be compared. Cement is substituted by GGBS in 15%, 20% 25% proportion and substituted by Fly ash in 15%, 20% & 25% proportion. These specimens are tested for Split tensile strength, compressive strength and bending strength at the age of 7 and 28 days. Using these industrial wastes not only increases strength but also makes the concrete eco-friendly.

A Review of Fly Ash-Based Geopolymer Lightweight Bricks

2015 ◽  
Vol 754-755 ◽  
pp. 452-456 ◽  
Author(s):  
Wan Mastura Wan Ibrahim ◽  
Kamarudin Hussin ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Aeslina Abdul Kadir ◽  
Mohammed Binhussain
Keyword(s):  
Sustainable Development ◽  
High Temperature ◽  
Fly Ash ◽  
Power Plants ◽  
Ordinary Portland Cement ◽  
Source Material ◽  
Embodied Energy ◽  
Raw Material ◽  
Environmental Aspects ◽  
The World

This paper offers a review on production of fly ash-based geopolymer bricks.Bricks are the world’s most versatile, durable and reliable construction material.Conventional bricks are produced from clay with high temperature kiln firing or from ordinary Portland cement (OPC) concrete,and thus contain high embodied energy and have large carbon footprint. In many areas of the world,there is already a shortage of natural source material for production of the conventional bricks. For environmentalprotection and sustainable development, extensive research has been conducted on productionof bricks from waste materials.Fly ash is a waste material of coal firing thermal plants and its accumulation near power plants causes severe pollution problems. Therefore, its utilization as a raw material for brick making will be a very beneficial solution in terms of economic and environmental aspects.

Sign in / Sign up

Export Citation Format

Share Document