point size
2.Final paper, 8-10 pages double spaced. All papers must be typed, double spaced, in 12-point font size. Use APA standard references, and proof read carefully.
5.This paper studied the effect of age of loading on the fracture energy(G_F)and frac-ture toughness(K_(IC))of concrete by using notched three-point bend beams with the same size.
9.The structure, morphology, size, size distribution, optical properties, magnetic properties and the melting point have been characterized by X-ray diffraction (XRD), laser scattering particle size distribution analysis (LSPSDA), transmission electron microscopy (TEM), ultraviolet-visible spectrophotometer (UV-vis), vibrating sample magnetometer (VSM) and differential scanning calorimeter (DSC), respectively.

