Figure 3 - uploaded by Getachew Gebreeyessus
Content may be subject to copyright.
The " Armfield " gas absorption experiment column at the mass transfer laboratory of the Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa, Ethiopia.
Similar publications
The Permian-Triassic mass extinction included a potentially catastrophic decline of biodiversity, but ecosystem change across this event remains poorly characterized. Here we reconstruct sedimentary factories and ecosystem change across the Permian-Triassic Critical Interval (P-TrCI) in the Xiakou area (South China). Six microfacies (MF) were class...
The Permian–Triassic mass extinction included a potentially catastrophic decline of biodiversity, but ecosystem change across this event remains poorly characterized. Here we reconstruct sedimentary factories and ecosystem change across the Permian–Triassic Critical Interval (P–TrCI) in the Xiakou area (South China). Six microfacies (MF) were class...
The 14 km wide Valdorria outcrop (Pennsylvanian, Northern Spain) is one of the few examples of entirely exposed flat-topped and high relief carbonate platforms reported in the fossil rock record. Laterally and vertically traceable stratal patterns expose three phases of growth. Phase I is a 430 m thick platform to slope succession that prograded ov...
In this chapter, we report existing and new lithostratigraphic information and Sr-isotope chemostratigraphic ages of several Cenozoic marine carbonate successions deposited within numerous Colombian basins. This information is used to link main changes in the shallow marine carbonate factory to regional environ-mental/tectonic events in the tropica...
Citations
... 18), the cost of operation is reduced by 224.45 birr/ton of clinker which is 12.07% reduction of the empirically determined value. Using this value as an improvement basis, the future state map of the value stream map is prepared.4.7.1. ...
Cement industry contributes to 5% of global CO2 emissions. To mitigate pollution, there is a need of CO2 sequestration into stable forms. Present research focusses on CO2 being channelized towards an important construction practice. This paper summarizes the potential of CO2 absorption in concrete. To verify CO2 absorption in concrete, an artificial CO2 environment for curing of concrete cubes using dry ice was created. Considering concrete of M20 grade, a comparative experimental study of water cured concrete cubes, CO2 cured concrete cubes, for penetration (using phenolphthalein indicator), and compressive strength was carried out. The result analysis of the tests indicated that CO2 cured concrete cubes showed 22.125% higher compressive strength than water cured concrete cubes and CO2 penetration of 13.5 mm after 2 hours. The rate of CO2 penetration and strength gain in concrete was found to be rapid in the early hours. It is shown that CO2 can prove to be a useful resource in the construction scenario, especially in the precast.
The global gas emission is keeping on increasing for which cement industry alone contributes 5%. The enormous water is required for curing of concrete in construction industry which can effectively be used for various purposes. The accelerated carbonation curing shows a way to reduce these emissions in a very effective way by sequestering it in concrete elements. In this research the effect of accelerated carbonation curing was checked on non-reinforced concrete elements (cubes) and reinforced concrete elements (prisms). The 100mm × 100mm × 100 mm cubes and 150mm × 150mm × 1200mm prisms were cast. They were CO2 cured for 4 and 8 hours and were tested for compressive strength and flexural strength test. The CO2 curing results showed 27.7% and 1.8% increase in strength of cubes and prisms, respectively when compared to water cured specimens. This early age strength through waste gas proves beneficial in terms of reducing in atmospheric pollution and saving the water which is a critical resource now-a-days.
