Ochánduri Block - Formwork Block for Reinforced Walls
Ochánduri Block: the reinforced wall without renting formwork
For a structural retaining wall, the expensive part isn't the concrete: it's the formwork. The Ochánduri Block is a 30 × 20 × 40 cm permanent formwork block: you dry-stack it, run the vertical and horizontal rebar through its cavities and fill it with concrete. The block itself acts as both formwork and finished face, with no panels and no stripping.
✅ Key advantages
No formwork: the block is dry-stacked and stays in place: savings on rental, assembly and stripping.
Structural wall: vertical and horizontal reinforcement through the cavities and concrete fill: real retention strength.
30 cm thick: a depth designed for retaining walls and residential basements.
Fast progress: 12.5 pieces per m², laid without mortar between courses.
Full pallet at a better price: 50 units (4 m² of wall).
Build the footing with the vertical starter bars already embedded as per the design calculations.
Dry-stack the blocks in a staggered bond, threaded onto the starter bars.
Place the horizontal reinforcement in each course as specified in the project.
Fill with fluid concrete in lifts of 3-4 courses, vibrating lightly.
For retaining walls, waterproof and drain the back face before backfilling with soil.
💡 Professional tip: a reinforced wall is a structure: the rebar diameter and spacing and the maximum height are defined by the project or a qualified engineer, not by habit. The block saves you the formwork, not the calculations.
Frequently Asked Questions
¿Qué es un bloque de encofrado perdido?
Un bloque hueco que se apila en seco y hace de molde: la ferralla y el hormigón de relleno van por dentro, y el bloque queda formando parte del muro.
¿Cuántos bloques necesito?
12,5 piezas por m² de muro. El palet de 50 cubre 4 m².
¿Necesita mortero entre hiladas?
No: se apila en seco a rompejuntas. La resistencia la aportan la armadura y el hormigón de relleno.
¿Qué armadura lleva?
La que defina el proyecto: esperas verticales desde la zapata y redondos horizontales en cada hilada. El cálculo corresponde a un técnico.
¿Cómo se rellena?
Con hormigón fluido por tongadas de 3-4 hiladas, vibrando ligeramente para que no queden coqueras.
¿Sirve para contener tierras?
Sí, es su uso principal, siempre con zapata, armado según cálculo e impermeabilización y drenaje del trasdós.
¿Se puede dejar visto?
Sí, la cara es de hormigón gris uniforme; también admite enfoscado, monocapa o revestimiento de piedra.
