That makes things easier! The empty fruits do look like those of Eucalyptus robusta on the following link:
http://www.noosanativeplants.c...
There's a good photo showing bark on this link:
http://plantnet.rbgsyd.nsw.gov...
Gum nuts stay on the plant much like Callistemon seed pods do, so what appeared to be nuts in the first photos could be flower buds which have dried up due to being chopped.
Fruit a thin-walled cylindrical to urn-shaped capsule (8–)10–18 mm × 6–11 (–12) mm, enclosed in a woody hypanthium, opening with 3–4 included to slightly exserted valves, many-seeded.
The description of the wood seems to fit, not sure about the bark though.
bark rough, soft, spongy, fibrous, red-brown
The heartwood is pale red when freshly cut, turning orange-red or red-brown with age; it is clearly demarcated from the up to 5 cm wide, pale brown sapwood. The grain is interlocked, texture coarse. Quartersawn surfaces sometimes have a ribbon figure of light and dark stripes.
It is one of the most widely planted Eucalyptus species and it has been introduced into many tropical, subtropical, and warm-temperate areas
It is used for reforestation and dune stabilization and it is planted to dry-out swamps, e.g. to combat malaria. It is sometimes used for windbreaks and wayside planting, and it has ornamental value.
Eucalyptus robusta is grown from sea-level up to 1600 m altitude, in areas with a mean annual temperature of 16–28°C, a mean maximum temperature of the warmest month of 25–32°C, a mean minimum temperature of the coldest month of 3–12°C, and an average annual rainfall of 700–1800 mm, with a dry season of 1–4 months.
http://database.prota.org/PROT...
It all seems to fit Eucalyptus robusta.
https://www.google.co.uk/searc...
