Study on corrosion effects under sulfate attack of concrete at a dry-wet circulation environment;

Sulfate attack is a very important effect to the concrete durability,however,the environment of concrete is not only sulfate attack,in fact,the concrete sometimes gets two factors of external environment and sulfate attack,such as dry-wet circulation etc.

Based on the situation of the concrete sulfate attack always exists in complex factors,the present research of the concrete sulfate attack is elaborated at a dry-wet circulation and carbonation environment,and experiments are used to prove that the dry-wet circulation and carbonation can accelerate the sulfate attack,some ideas for the future research are provided.

The simulated experimentation was employed to research the four types of soil in water level fluctuation zone of Three Gorges Reservoir, this provided the evidences for the study of characteristics of cadmium release in soil under wet-dry cycle condition.

The results indicated that there was an unobvious influence of the wet-dry cycles on the formation and spreading of micro-droplets in a condition without the electrochemical polarization.

Correlative analysis among water use efficiency and others traits of wheat varieties A115 and 4185 was studied by pot cultivation under rainproof shelter with 3 alternate drying-wetting treatments.

Effect of continuous submerging and wetting-redrying on cadmium speciation and uptake by Sorghum hybrid Sudangrass in a Ferric-accumulic Stagnic Anthrosol and a Tipical Hapludult collected from the Taihu Lake region and the rolling downs of Yingtan,Jiangxi,China respectively,was studied by pot experiment with Cd spike in 2003.