conclusions about the respective weather conditions can also be drawn from the study of annual rings. If a summer was cold or too dry, the annual rings will be narrower, while the better growth associated [...] has grown. Trees also store information about these conditions in their annual rings. For example, if a tree is growing in the mountains, its annual rings will be much narrower than a tree of the same [...] determine wood density and carbon content. Wood samples are weighed and then kiln-dried for a week in a UF750plus drying oven at 103 ℃ before being weighed again. The difference in mass is equivalent to the moisture
inert passivation layer of iron oxide on the steel reinforcement, preventing the formation of rust. If, over time, the combination of humidity and CO 2 affect the structure, the calcium hydroxide reacts [...] into storage for 70 days at 20 ℃, 55 % rh and 3 % CO2 in a Memmert constant climate chamber ICH750C. The depth of carbonation is determined after 56, 63 and 70 days. This is done by splitting the test specimen
