The discovery of cinnabar in Hg-anomaly soil of cities and outskirts in plain areas and its characteristics;

For the purpose of solving the problems that have occurred in the anomaly appraisal and inspection in urban environment geochemistry, the authors carried out panning and thus found cinnabar and magnetic particles in anomalous areas of mercury and other heavy metals around urban districts in the alluvial plain.

Rock powders are used as admixture to the natural sands for roller compacted concrete of Jinghong hydroelectric project;

Two lab-scale Constructed Rapid Infiltration Systems (CRI) have been designed to treat bath wastewater by using natural sands for seven months.

In the light of the low Hydraulic Loading of traditional wastewater rapid infiltration land treatment system, a experiment project of building Constructed Rapid Infiltration (CRI) system by using natural sands is put forward.

Properties of artificial sand and natural sand;

Through comparison of the applying effects of man-made and natural sand in slurry and concrete,it shows man-made sand could take place of natural sand and can improve the durability and hardness of slurry and concrete.

In this paper,the influence of natural sands,manufactured-fine aggregates and micro-fines in the manufactured-fine aggregates on some performances of highstrength concrete was tested by the method of contrast,which included workability,compressive strength,Young s modulus,drying shrinkage and creep.