Evaluation of the use of TiO2 industry red gypsum waste in cement production

Gázquez, M.J.; Raya, Juan Pedro Bolívar; Vaca, F.; Garcı́a-Tenorio, R.; Caparros, A.

doi:10.1016/j.cemconcomp.2012.12.003

Cited by 69 publications

(21 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The emissions from cement that could have an impact on acidification of ecosystems were found to be NO x , SO 2 , and H 2 SO 4 , which accounted for about 50, 30, and 20%, respectively. Also, the emissions that have an impact on eutrophication were NO x , NH 4 , NO 3´, and PO 4 3´, which accounted for 70%, 10%, 10%, and 10%, respectively [24].…”

Section: Resultsmentioning

confidence: 99%

Environmental Impact Analysis of Acidification and Eutrophication Due to Emissions from the Production of Concrete

Kim

Chae

2016

Sustainability

View full text Add to dashboard Cite

Concrete is a major material used in the construction industry that emits a large amount of substances with environmental impacts during its life cycle. Accordingly, technologies for the reduction in and assessment of the environmental impact of concrete from the perspective of a life cycle assessment (LCA) must be developed. At present, the studies on LCA in relation to greenhouse gas emission from concrete are being carried out globally as a countermeasure against climate change. However, the studies on the impact of the substances emitted in the concrete production process on acidification and eutrophication are insufficient. As such, assessing only a single category of environmental impact may cause a misunderstanding about the environmental friendliness of concrete. The substances emitted in the concrete production process have an impact not only on global warming but also on acidification and eutrophication. Acidification and eutrophication are the main causes of air pollution, forest destruction, red tide phenomena, and deterioration of reinforced concrete structures. For this reason, the main substances among those emitted in the concrete production process that have an impact on acidification and eutrophication were deduced. In addition, an LCA technique through which to determine the major emissions from concrete was proposed and a case analysis was carried out. The substances among those emitted in the concrete production process that are related to eutrophication were deduced to be NO x , NH 3 , NH 4 + , COD, NO 3´, and PO 4 3´. The substances among those emitted in the concrete production process that are related to acidification, were found to be NO x , SO 2 , H 2 S, and H 2 SO 4 . The materials and energy sources among those input into the concrete production process, which have the biggest impact on acidification and eutrophication, were found to be coarse aggregate and fine aggregate.

show abstract

Section: Resultsmentioning

confidence: 99%

Environmental Impact Analysis of Acidification and Eutrophication Due to Emissions from the Production of Concrete

Kim

Chae

2016

Sustainability

View full text Add to dashboard Cite

show abstract

“…This is because, in the process of increasing the rotary kiln temperature up to 1000~1450˝C in order to produce clinkers, the input of fuels such as Bunker-C Oil, bituminous coal, waste tires, and waste plastics emits environmental impact substances such as carbon dioxide (CO 2 ) and ammonia (NH 3 ). This is because most fuels used are mainly composed of carbon and hydrogen, and are made from crude oil that contains oxygen and sulfur [27]. Also, the amount of cement put in high strength concrete (40~80 MPa) was about 20% more than in normal strength concrete (below 18~40 MPa).…”

Section: Environmental Impact According To Concrete Strengthmentioning

confidence: 99%

Analysis of Environmental Impact for Concrete Using LCA by Varying the Recycling Components, the Compressive Strength and the Admixture Material Mixing

2016

View full text Add to dashboard Cite

Abstract:Concrete is a type of construction material in which cement, aggregate, and admixture materials are mixed. When cement is produced, large amounts of substances that impact the environment are emitted during limestone extraction and clinker manufacturing. Additionally, the extraction of natural aggregate causes soil erosion and ecosystem destruction. Furthermore, in the process of transporting raw materials such as cement and aggregate to a concrete production company, and producing concrete in a batch plant, substances with an environmental impact are emitted into the air and water system due to energy use. Considering the fact that the process of producing concrete causes various environmental impacts, an assessment of various environmental impact categories is needed. This study used a life cycle assessment (LCA) to evaluate the environmental impacts of concrete in terms of its global warming potential, acidification potential, eutrophication potential, ozone depletion potential, photochemical ozone creation potential, and abiotic depletion potential (GWP, AP, EP, ODP, POCP, ADP). The tendency was that the higher the strength of concrete, the higher the GWP, POCP, and ADP indices became, whereas the AP and EP indices became slightly lower. As the admixture mixing ratio of concrete increased, the GWP, AP, ODP, ADP, and POCP decreased, but EP index showed a tendency to increase slightly. Moreover, as the recycled aggregate mixing ratio of concrete increased, the AP, EP, ODP, and ADP decreased, while GWP and POCP increased. The GWP and POCP per unit compressed strength (1 MPa) of high strength concrete were found to be about 13% lower than that for its normal strength concrete counterpart. Furthermore, in the case of AP, EP, ODP, and ADP per unit compressed strength (1 MPa), high-strength concrete was found to be about 10%~25% lower than its normal strength counterpart. Among all the environmental impact categories, ordinary cement was found to have the greatest impact on GWP, POCP, and ADP, while aggregate had the most impact on AP, EP, and ODP.

show abstract

“…If its particles come into contact with water molecules after drying, setting along with heating occurs. In addition, titanium gypsum works as a cement activator as well as the alkaline activator of BFS as pH increases from 6 (before calcination) to 7.5 (after calcination) when being mixed with limestone [9].…”

Section: Waste Additive (Wa) Titanium Gypsummentioning

confidence: 99%

The Environmental Impact and Cost Analysis of Concrete Mixing Blast Furnace Slag Containing Titanium Gypsum and Sludge in South Korea

et al. 2016

View full text Add to dashboard Cite

This study assessed the environmental effects and cost of the Industrial Waste addictive Blast Furnace Slag (W-BFS) using Life Cycle Assessment (LCA) and compared it to general BFS. The environmental impacts of W-BFS were as follows: 1.12ˆ10´1 kg-CO 2 eq/kg, 3.18ˆ10´5 kg-Ethylene eq/kg, 4.79ˆ10´4 kg-SO 2 eq/kg, 7.15ˆ10´4 kg-PO 4 3´e q/kg, 7.15ˆ10´4 kg-CFC 11 eq/kg and 3.94ˆ10´3 kg-Antimony eq/kg. Among the environmental impact category, GWP and AP were 9.28ˆ10´2 kg-CO 2 eq/kg and 3.33ˆ10´4 kg-SO 2 eq/kg at a raw material stage, accounting for 80% and 70% of total environmental impact respectively. In EP, POCP and ADP, in addition, raw material

show abstract

Evaluation of the use of TiO2 industry red gypsum waste in cement production

Cited by 69 publications

References 17 publications

Environmental Impact Analysis of Acidification and Eutrophication Due to Emissions from the Production of Concrete

Environmental Impact Analysis of Acidification and Eutrophication Due to Emissions from the Production of Concrete

Analysis of Environmental Impact for Concrete Using LCA by Varying the Recycling Components, the Compressive Strength and the Admixture Material Mixing

The Environmental Impact and Cost Analysis of Concrete Mixing Blast Furnace Slag Containing Titanium Gypsum and Sludge in South Korea

Contact Info

Product

Resources

About