Greener concrete using coal industrial waste (fly ash): an efficient, cost effective and eco-friendly construction materials for the future
11 Aug 2016-Vol. 1, Iss: 1, pp 8-14
TL;DR: The use of coal fly ash as a performance-enhancing ingredient in concrete is one of the most outstanding examples of industrial ecology-i.e., making effective use of waste resources, and ultimately eliminating the concept of waste altogether as mentioned in this paper.
Abstract: Nowadays recycling of waste and industrial by products gaining popularity to make concrete eco-friendly material and the concrete can be called as Green Concrete. Green concrete is a revolutionary topic in the history of concrete industry. Coal fly ash is an abundant industrial waste product, known to be a good pozzolanic material and has been used to increase the ultimate compressive strength and workability of fresh concrete. For this simple reason it is rapidly becoming a common ingredient in concrete all over the world; it is already present to some degree in half the concrete. The use of fly ash as a performance-enhancing ingredient in concrete is one of the most outstanding examples of industrial ecology-i.e., making effective use of waste resources, and ultimately eliminating the concept of waste altogether. In fact, given the huge volume of concrete production worldwide, the potential for effectively using fly ash and other common industrial by-products makes it one of the key components of a global industrial ecology. The paper aims at discussing the use of coal fly ash in construction contributes the reduction of greenhouse emissions with negative impacts on the economy. These wastes utilization would not only be economical, but may also help to create a sustainable and pollution free environment.
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TL;DR: The waste management process presented in this paper promotes the sustainable management of the spent fluid catalytic cracking catalyst and contributes to the development of a new resource for a critical material such as lanthanum.
24 citations
TL;DR: In this paper , the authors evaluated the mechanical properties of fly ash Ground Granular Blast Furnace Slag based Geopolymer Concrete (FGGPC) with partial replacement by various percentage of Titanium di oxide (TiO2).
Abstract: In current scenario, new innovative recyclable materials are scientifically tried to be a part of concrete for improving the properties and reducing the cost. The aim of the present study, is to evaluate the mechanical properties of Fly ash Ground Granular Blast Furnace Slag based Geopolymer Concrete (FGGPC), with partial replacement of fly ash by various percentage of Titanium di oxide (TiO2). In this study, mechanical properties like strength (compressive and split tensile strength) and elasticity properties (modulus of elasticity and modulus of rupture) are assessed, which is basic requirement study for any type of concrete. It is found that, up-to 3% partial replacement of fly ash by TiO2 result in enhanced mechanical properties of FGGPC. Models based on mechanical properties of conventional concrete are available in literatures and standards. Dependency of these models are checked using statistical method and interval concepts. Reliability of the relationships between conventional and FGGPC is validated by Integral Absolute Error (IAE), Mean Absolute Error (MAE), Root Mean Square Error (RMSE), prediction and confidence intervals concepts.
7 citations
03 Sep 2017
TL;DR: In this paper, the authors highlight the management of fly ash to make use of this solid waste and its beneficial potential in application of civil engineering construction as well as others to reduce the environmental pollution.
Abstract: In today’s era energy planners are aiming to increase the use of oil, gas, nuclear and also renewable energy sources to meet the electricity demand in India. But till now coal-based thermal power plants are the major source of electricity generation and they will continue to dominate in the next few decades too. India has some of the largest reserves of coal in the world. Indian coal has high ash content and low calorific value. Some 85 thermal power stations, besides several captive power plants use bituminous and sub-bituminous coal and produce large quantities of fly ash. High ash content (30%-50%) coal contributes to these large volumes of fly ash. Current annual production of Fly ash, a by-product from coal based thermal power plant, is about 112 million tons. One of the major disadvantages of coal-based thermal power plants is the disposal problem of Fly Ash. It was earlier considered as a total waste and an environmental hazard, thus its use was limited, without much understanding. Fortunately, its useful properties have now begun to be known as raw material for various applications as an outcome of their efforts, Fly Ash is being very effectively and economically used in building components such as bricks, cement, doors, door-frames, etc. Fly Ash is also being used in construction of roads and embankments with some design changes. It is also used as raw material in agricultural and wasteland development programmed. The trend is clear, Fly Ash will soon be considered as a resource material and its potential will be fully exploited. Through development & application of technologies, Fly Ash has shifted from “Waste Material” category to “Resource Material” category. Thus fly ash management is a cause of concern for the future. This article attempts to highlight the management of fly ash to make use of this solid waste and its beneficial potential in application of civil engineering construction as well as others to reduce the environmental pollution.
1 citations
Journal Article•
TL;DR: In this article, experiments were carried out using fly ash as an adsorbent in domestic sewage water treatment and the experimental results showed significant reduction in the values of BOD from 385 mg/l to 45-55mg/l, COD from 680 mg/lp to 110-150 mg/L, pH from 8.4 to 6.9 and TDS from 715 mg/lt to 250-300 mg/t after treatment.
Abstract: Wastewater treatment and disposal is a serious issue and need attention for protecting the environment. Over the recent years, fly ash has been experimented as an adsorbent for the waste water treatment plants. The abundant availability, high carbon content and adsorption characteristics of fly ash lead to application in waste water treatment methods. In this study, experiments were carried out using fly ash as adsorbent in domestic sewage water treatment. A filter media was prepared with pebbles, sand and fly ash with different thickness, characterized and used for the removal of impurities. The physio-chemical properties of waste water before and after treatment were examined. The experimental results showed significant reduction in the values of BOD from 385 mg/l to 45-55 mg/l, COD from 680 mg/l to 110-150 mg/l, pH from 8.4 to 6.9 and TDS from 715 mg/l to 250-300 mg/l after treatment. Beneficial effects of fly ash utilization as adsorbent was observed for removing various impurities present in wastewater.