New invention would certainly speed up the new road construction from Tola.
what's the rush?
Besides labor here is so cheap, the work is needed and the road would have to be very well prepared first including a well tamped bed of gravel.
I am more in favor of sacrificing time in favor of putting people to work!
I agree that putting people to work is desirable, but I don't think that we should go back to the stone age! With any type of paving, a well prepared base is essential. Thirty years ago Mother Earth News had a story about a machine that allowed forming and cast - in - place concrete pavers (if I remember right, this machine was made in Mexico). That would seem to be a more reasonable approach to the paver type road building that I have seen here. What I think happens here, is that the pavers are made in a factory, where they are probably moved by hand at least twice (first to dry enough so they can be stacked, then stacked for several weeks). Then they are hand loaded onto a truck, delivered to a job site, unloaded and stacked relatively close to their place of final repose. As the job progresses, they are hand loaded into a wheel barrow, brought closer to where they will end up and unloaded from the wheel barrow. Then the person that will actually place them takes a few steps to retrieve one or two pavers (depending on type/size) and proceeds to final placement. I think that this adds up to handling these pavers eight tmes! Site mixed concrete and cast - in - place eliminates extra fuel costs (materials to factory - pavers to job site) eliminates almost all hand movement of pavers and ends up with a better job!
is a good way to keep the country backwards forever.
Part of the rational for pavers is that they can be repaired easily with hand labor only (no new materials). This may make sense in an urban area where roads need to be cut for pipe repairs, etc. but it makes no sense for country roads. If you are going to use cement it would be better to pour it in place and have a smooth, uniform, stronger surface.
But then again, cement is a very expensive road building material. In most places it is reserved for high-traffic use like freeways. I think the pavers are a tradition/corruption/foreign aid thing, leaf raking without the leaves.
I like Esteli's latest project-- they paved over the bumpy old pavers with brand-new asphalt.
"Anything that is complex is not useful and anything that is useful is simple. This has been my whole life's motto."
Mikhail Kalashnikov, Russian inventor
After the riots in Egypt, some places are replacing the pavers with concrete because it was too easy to pry them up and throw them.
The adoquines being made at Somoza owned plants and then ripped up and used as barricades and protection during the conflict.
Roads paved with adoquines can be repaired by people -- not just big machines. I agree that making them close to where they are used would seem to make sense but their use in rural areas also makes sense.
The roads to San Nicolas and El Sauce are paved with them. On both of those roads I have seen repair work done after rainy season damage. It's the kind of work that would have been put off if it meant needing new asphalt. I have seen the work in progress on the San Nicolas road. An amusing situation showed me it had been done on the road to El Sauce.
The road has a yellow stripe down the middle. One day on my way to El Sauce the strip turned into some random yellow spots for about 50 meters. Clearly, the adoquines had been removed to fix the road bed and then put back without any concern for the stripe.
I also agree that people need the work over machines. I just thought it was a really cool machine.
I agree, and pretty simple to build.
Grama: Nicaraguan for lawn.