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Sitting in chairs on the pavement blocking the gate to the station, the officers complained that since the revolution they have been called upon to confront protesters but at the same time demonized whenever they hurt or killed one.
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"We know, because we built the toilets for our office using polyethylene pavement blocks for the structure".
It was mostly throwing of pavement blocks by both sides," he said.
First of all, pavement blocks were taken from the Leien after different periods of exposure.
Measurements correspond to different pavement blocks taken from the test site in Antwerp at different periods of time Open image in new window Fig. 7 Measurements on pavements blocks in 2010, all before washing, after 5 years of service life.
Open image in new window Fig. 5 Separate parking lanes at the Leien of Antwerp with photocatalytic pavement blocks.
Repeated measurements in the laboratory on photocatalytic concrete pavement blocks confirm the efficiency over time, even after more than 5 years of service life.
Open image in new window Fig. 6 NOx concentration at the outflow, measured on 2 pavement blocks, before (hatched) and after (colored) washing the surface.
In the case of concrete pavement blocks [7, 8], the anatase is added to the wearing layer of the pavers which is approximately 8 mm thick.
In order to see the influence of photocatalytic pavements in "real life", a first pilot section of 10.000 m2 of photocatalytic pavement blocks was constructed in 2004 2005 on the parking lanes of a main road axe in Antwerp. Figure 5 gives a view of the parking lane, where the photocatalytic concrete pavement blocks have been applied.
The strength and other properties met the Bureau of Indian Standards for non-structural materials such as flooring tiles, solid and pavement blocks, and bricks.
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