Quantitative assessment on the embodied environmental impact of concrete with or without fly ash

2005 ◽  
Vol 20 (3) ◽  
pp. 99-103 ◽  
Author(s):  
Li Sitang ◽  
Li Huiqiang
Keyword(s):  
Fly Ash ◽  
Environmental Impact ◽  
Quantitative Assessment

scholarly journals Fly Ash-Based Geopolymer Building Materials for Green and Sustainable Development

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5699
Author(s):  
Rosicky Methode Kalombe ◽  
Victor Tunde Ojumu ◽  
Chuks Paul Eze ◽  
Sammy Mwasaha Nyale ◽  
John Kevern ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Compressive Strength ◽  
Fly Ash ◽  
Environmental Impact ◽  
Co2 Emissions ◽  
Building Materials ◽  
Curing Conditions ◽  
High Alkalinity ◽  
Series Of Experiments ◽  
Minimal Environmental Impact

This study reports on formulations and conditions for producing fly ash-based geopolymers with a view to showing that the compressive strength required for construction applications can be obtained without the addition of aggregates, sand, and/or cement. It was shown in a series of experiments constituting at least 73% fly ash that a compressive strength of up to 90 MPa can be obtained depending on the curing conditions. While high alkalinity resulted in stronger materials, the results showed about 40% savings in CO2 emissions without using sand and cement. Such materials are suited for construction applications with minimal environmental impact.

Marine Disposal of Fly Ash from Coal Fired Power Plants

1983 ◽  
Vol 15 (11) ◽  
pp. 109-131 ◽  
Author(s):  
Ole Hjelmar
Keyword(s):  
Water Quality ◽  
Fly Ash ◽  
Environmental Impact ◽  
Power Plants ◽  
Leaching Test ◽  
Research Project ◽  
Ash Ponds ◽  
Field Investigations ◽  
Ash Disposal ◽  
Quality Institute

In order to obtain an evaluation of the environmental impact of a proposed artificial marine island of deposited fly ash a comprehensive research project has been carried out by the Water Quality Institute in cooperation with other institutes. The project involved a number of field investigations designed to yield the information required to predict emissions and ensuing ecotoxicological effects of such an island. This paper treats some project activities which were performed in pursuit of data needed for estimating emissions from various stages of a marine ash island: Dry fly ash characterization, monitoring of operating ash ponds, investigations at old ash ponds, and laboratory leaching test. The results may be used to describe and evaluate emissions from various forms of marine fly ash disposal.

EFFECT OF FLY ASH CONTENT IN MBC BONDER FOR SUSTAINABLE CFRP RETROFIT

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Reece Sainsbury ◽  
Vasudeva Upadhyaya Raghavendra ◽  
T. G. Suntharavadivel ◽  
Kai Duan
Keyword(s):  
Fly Ash ◽  
Environmental Impact ◽  
Structural Engineering ◽  
Ash Content ◽  
Partial Replacement ◽  
Experimental Program ◽  
Health Issues ◽  
Externally Bonded ◽  
Recent Developments ◽  
Frp Retrofit

The rehabilitation and strengthening of reinforced concrete structures have been attracting increasing attention due to various factors including increase in traffic volume and weight, structural aging and environmental impact. Various techniques such as grouting, guniting and external post-tensioning are being used to retrofit or strengthen deteriorated members. With recent developments in the application of fiber composites in structural engineering, externally bonded Fiber Reinforced Polymer (FRP) system has become one widely used repair techniques because of its durability and long-term cost-effectiveness. In the FRP bonded retrofit technique, epoxy is often used as the bonding material. Because of environmental impact and health issues, construction sector is always looking for sustainable alternative bonding materials for FRP retrofit. A new trend on using Mineral Based Composites (MBC) has garnered the attention for a possible alternative to replace the use of harmful epoxy in FRP retrofit. MBC is formed by mixing the cement with some other minerals together and some concrete admixtures. As a part of a project to investigate optimum mix for the MBC, a series of tests were carried out to study the effect of fly ash content in the MBC mix as a partial replacement of cement. This paper discusses the results from this experimental program and evaluates the optimum fly ash content for the MBC and its associated properties.

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