Radiation shielding concrete is widely used in nuclear power plants, accelerators, hospitals, etc. With the development of nuclear industry technology, research on radiation shielding material properties is of great importance. Research on properties of radiation shielding concrete with different aggregates or admixtures and the effect of high temperature on the performance of shielding concrete are introduced. Along with the nuclear waste increase, shielding concrete durability and nuclear waste disposal are getting paramount.

This paper carries out dynamic tests of self-compacting prestressed concrete beams, 10 simply-supported and 5 free, then simulates modal analyses. It shows that, via comprehensive analyses of the first four natural frequencies and modes, the simple support can not achieve the ideal confinement effect for dynamic tests. Especially the tested high frequencies and modes are obviously different from corresponding theoretical values, instead the same as elastic-supported beams. The support plays the role of elastic one. The conclusions will provide meaningful references to further researches on prestressed concrete beams such as improving the accuracy of tests, dynamic analyses and theoretical frequency calculation.

In order to study the dynamic compression performance of waste glass powder concrete (WGPC) under high strain rate, the experiment uses the split Hopkinson pressure bar (SHPB) device with 4 increasing strain rates to test the plain concrete and WGPC block with 10% waste glass powder, the dynamic compressive strength, peak strain, stress-strain curve and other characteristics are obtained through this experiment, and the variation rules of these characteristics with the strain rate and the amount of waste glass powder are analyzed. The results show that with the increase of strain rate, the dynamic compressive strength of WGPC has significant strain rate effect; In the multi-group test, the dynamic compressive strength of WGPC reached a maximum of 58.45 MPa, compared with static compressive strength, the increase is 166%, which is close to the strength of plain concrete, indicating that the waste glass powder in concrete is a good substitute for cement under high strain rate.

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