I need to fix a rather long retaining wall (25-30 m) but only between 20-40 cm high against the lawn so there won't be much pressure against it. The wall will be standing on a concrete slab and some parts on a "concrete stump" that I will cast out from the slab. I want a fairly "hefty" thickness (20 cm) on the wall.
My idea is to first build everything with leca blocks 15 cm thick and 5 cm lower than the wall should be with platon behind. Then I attach cast iron/mesh to the leca blocks and build form plywood on the front and against the blocks on the backside and fill with concrete. In this way, it will look like a solid concrete wall but filled with leca blocks.
My concern is mainly whether water/moisture in the leca blocks can then crack the concrete (though it's 5 cm reinforced concrete)?
I will mix all the concrete by hand so casting everything seems out of the question, and I already have two pallets of leca from a previous project...
My idea is to first build everything with leca blocks 15 cm thick and 5 cm lower than the wall should be with platon behind. Then I attach cast iron/mesh to the leca blocks and build form plywood on the front and against the blocks on the backside and fill with concrete. In this way, it will look like a solid concrete wall but filled with leca blocks.
My concern is mainly whether water/moisture in the leca blocks can then crack the concrete (though it's 5 cm reinforced concrete)?
I will mix all the concrete by hand so casting everything seems out of the question, and I already have two pallets of leca from a previous project...