Your ignorance of things "Caribbean" seems to be boundless.
You're trying to impose your own arbitrary ideals and it's insulting. When you come into a country with a chip on your shoulder(which you seem to be making an effort to do), no one is going to want to listen you, no matter how good your ideas are.
I'm not a great fan of the concrete buildings, either, but there are two little details that make them important:
1. Criminals
2. Hurricanes
Locally found building materials is a good option, but remember that concrete is made out of limestone, rocks, and sand. And one thing the DR has lots of is limestone, rocks, and sand.
If I understand you, you would use this type of brick to line the drywells? Again the issue would be cost effectiveness.
Cinderblocks are the cheapest was to cover a m2 of surface, both timewise and efficiency wise. This Cinvaram process requires a lot of personnel and requires a place to get the dirt, a mixing shed water to curesand etc, which are not available at reasonable costs. The only upside is the community participation.
For example. We were lucky to have a friend who would lend us his dumptruck once or twice a week to haul the dirt from a "mine' that was close by, but we had to find guys or we ourselves had to load that truck...and that was hard, backbreaking work.
Then we had to cure the bricks...well we got kids to water them like flowers...\
And so on..
Better to stick with cinderblocks, me thinks.
HB
So long as the experts are paying attention, I have two questions:
1. When I lived in Mexico a long, long time ago, making adobe included straw in the process. Is that necessary? If making adobe here, what is used as the straw?
2. When I as in El Salvador visiting, I found that instead of tin, aluminum, or other metals for roofing, they were using heavy fiberglass sheets that seems to be as good as metal but not nearly as hot. I'm not talking about those crappy cheap fiberglass sheets that let the sunlight in and break after two years, but instead these were heavy grey fiberglass sheets that seemed to be very resilient. Any idea what that was, and is it available here?