Bamboo scrimber is a new type of composite bamboo lumber. Its mechanical properties, for example, flexural strength parallel to grain, are superior to that of untreated bamboo lumber, and it can be used in many fields of construction. When employed outdoors, construction materials will be exposed to water in the form of rain and air humidity, and their moisture content (MC) will change constantly. It is therefore important to understand the influence of MC on the expansion rate, flexural strength parallel to grain, flexural modulus, and stiffness of bamboo scrimber. The results of this study show that the expansion in width and thickness of bamboo scrimber increases logarithmically with an increase in MC. The flexural strength parallel to grain and modulus of bamboo scrimber decrease significantly with an increase in MC until the fiber saturated point (FSP) is reached; increasing the water content further results in smaller flexural strength parallel to grain and modulus reductions. The FSP of the bamboo scrimber obtained in this study is 19.9%.

This work studies the influence of various parameters, such as temperature and humidity, fly ash content and chloride concentration, on the relationship between half-cell potential and the corrosion level of rebar in concrete. Results show that the half-cell potential decreases with an increase in temperature under the same corrosion level of rebar, and half-cell potential decreases with an increase in corrosion level of rebar under the same temperature. The half-cell potential decreases with an increase in chloride concentration and increases with an increase in fly ash content when fly ash content is lower than 50% under the same corrosion level of rebar, and the half-cell potential decreases with an increase in the corrosion level of rebar under the same chloride concentration and fly ash content.

The paper presents the experimental results of the influence of relative humidity (RH), temperature, fly ash content and chloride concentration on the relationship between concrete resistivity and the corrosion level of steel bar in concrete. The results show that the concrete resistivity decreases with the increase of corrosion level of steel bar under the same RH and temperature. The concrete resistivity decreases with the increase of RH and temperature, and the relationship between concrete resistivity and RH (temperature) is established. The concrete resistivity increases with the increase of fly ash content when the concrete cover thickness and the corrosion level of steel bar are the same, while it decreases with the increase of chloride concentration. The relationship between concrete resistivity and the corrosion level of steel bar in concrete with different chloride concentration (fly ash content) is established.