cyber road — Cyber

recipe for high-durability pozzolanic concrete with aggregate inspired by roman concrete

table: mix per 1 m³ compacted concrete

component	bahasa name	weight (kg)	volume (liters)	density (kg/m³)	function
crushed gravel	kerikil basalt campuran	~800	~500	~1600	structural aggregate
lime paste	kapur sirih	130	~81	~1600	primary binder
volcanic ash	abu vulkanik	200	~133	~1500	pozzolanic reaction
basalt powder	bubuk basal halus	100	~67	~1500	microfiller, structure
kaolin clay	lempung kaolin	70	~47	~1500	thermal stability
wood ash	abu kayu halus	40	~33	~1200	secondary pozzolanic action
clean water	air bersih	120	120	1000	activation of reaction
rubber latex	getah karet alami	2–5% of liquid	included in water	~920–980	improves flexibility, crack resistance

instructions
- mix dry components thoroughly: volcanic ash, basalt powder, kaolin clay, wood ash
- separately prepare lime paste
- combine dry mix with lime paste
- gradually add clean water while mixing
- optionally replace 2–5% of water with getah karet
- mix until thick sour cream consistency
- add crushed gravel and mix thoroughly
- pour in 10–15 cm lifts; compact using tamping or vibration
- cover surface with wet cloth or mist for at least 10–14 days
summary
- outstanding compaction is critical
- final density after compaction: ~1900–2100 kg/m³
- expected durability: 1000+ years in tropical open-air conditions

cyber road.md