Using low concentration TiOSO4 as titanium raw material, anatase white pigment was prepared by self seeded thermal hydrolysis route via short sulfate process. The effects of hydrolysis temperature and hydrolysis time on the structure and pigment properties of the as-prepared samples were investigated. The samples were characterized by XRD, particle size distribution and pigment properties test. The hydrolysis temperature and time had great effects on the hydrolysis rate, particle size distribution, crystal growth and particle aggregation of TiO2, eventually determined the pigment structure and its pigment properties. The optimized hydrolysis temperature was at faint boiling point, and the hydrolysis time after second boiling point was of 2.5h. Anatase white pigment was appropriate particle size, narrow particle size distribution and good pigment properties.

In view of the present situation that the preparation of complex high titanium heavy slag concrete (hereinafter referred to as CHTHSC) by using all coarse aggregate, fine aggregate and ground admixture made of high titanium heavy slag, is in need of experiments and studies in detail, this paper, based on the verification and analysis of structural stability of complex high titanium heavy slag and through tests of preparing CHTHSC from C10 to C55, compares CHTHSC with ordinary concrete and high titanium heavy slag concrete (hereinafter referred to as HTHSC) from three aspects of mixture amount of coarse aggregate, fine aggregate and composite powder. Results show that the compression resistance, axial compression resistance and cleavage strength of CHTHSC are higher than those of the other two kinds of concrete. For CHTHSC, it is appropriate to have composite powder take the place of 15%-20% of cement content.

Taking the C30 complex high titanium heavy slag concrete (hereinafter referred to as CHTHSC) as example, this paper makes experiments and researches its performance on the long-term deformation and durability. The results show that, the CHTHSC will not lead to the problem of volume stability, and its shrinkage strain and creep meet the design standards. The CHTHSC shows no alkali- aggregate reaction, and its impervious grade, carbonation depth, Chloride ion diffusion coefficient, sulfate corrosion resistance coefficient meet the design requirements for concrete durability. The investigation on the durability of projects with the CHTHSC shows that the compression resistance of concrete in their cores is higher than design strength, with outward appearance unchanged. The experiment results provide important reference for the application of this kind of concrete.

The current theory of elasticity persisted in the standpoint that normal stress exists in pure bending and shearing stress exists in pure torsion, which has been negated by the non-zero point force moment elasticity theory .The mentioned new theory proved that bending point moment exists in pure bending and torsional point moment exists in pure torsion, which debunk the current theory of elasticity that the limit moment acting on the unit area is zero. As a consequence, the causation of fatigue should be revised as point moment instead of stress. By using theory of stress and the new theory to analyze fatigue of non-slender rod, safety factor worked out by the former one is much bigger, which suggests that theory of stress cannot ensure safety. Undoubtedly, that is the fundamental causation of frequent occurrence of fatigue rupture. Thus, the new theory is of great significance in the prevention of unexpected fatigue rupture in the field of aerospace, navigation, transportation and mechanical engineering, etc.

Using unconcentrated industrial TiOSO4 solution as raw material, rutile TiO2 white pigment was prepared via the self-seeded thermal hydrolysis sulfate process. The effects of pre-adding water volume ratio on the hydrolysis process and pigment properties of the TiO2 white pigments were investigated. The samples were characterized by XRD, particle size distribution and pigment properties test. The pre-adding water volume ratio had great effects on the quantity and active of seed crystal, hydrolysis process, eventually determined particle size distribution and its pigment properties. The optimized pre-adding water volume ratio was of 0.22. The as-prepared rutile white pigment was with appropriate particle size, narrow particle size distribution and good pigment properties.