Standard epoxy grout elastic modulus

In epoxy grout structure calculation formula, often encounter epoxy grout elastic modulus of the indicators, visible epoxy grout elastic modulus of the index is very important. The national standard GB 50010 epoxy grout elastic modulus Ecc to their level of intensity values ( Represented by fcu, k) According to the following formula: Ecc = 105 / ( 2. 2 + 34. 7/fcu,k) 。 Epoxy grout is one of the most commonly used material in modern engineering construction. Compared with traditional materials such as iron, wood, stone, the history of modern reinforced epoxy grout the shortest, but the most widely used. Modern reinforced epoxy grout technology segment, confused is difficult to use a few simple review article clearly. Epoxy was reviewed in this paper, the author shallow grout the history, structure, classical project, building performance, as well as the new progress in epoxy grout material. The apparent density of epoxy grout can be reduced to 400 ~ 1800 kg/m3, but its strength and elastic modulus has reduced. Commonly used with light aggregate epoxy grout, bubble epoxy grout, aerated epoxy grout, lightweight aggregate macroporous epoxy grout, etc. Besides used for thermal insulation materials, large span and large cantilever structure and now in the bridge structure, also often use of lightweight epoxy grout floor to reduce the structure weight. Are used when calculating the structural vibration characteristics of structure stiffness and mass, but the United States and China specifications when calculating the structural stiffness and mass methods is different, also caused the vibration characteristics of large difference. When calculating the structure stiffness, the two countries adoption of the epoxy grout formula modulus of elasticity is different. Another Chinese standard considering floor beam stiffness enhancement effect, set the beam stiffness coefficient increase, while the beam stiffness reduction, centre sill, edge beam, the stiffness of coupling beam adjustment coefficient of 2 respectively. 0 and 1. 5, 0. 5. The specification under seismic action are considered plastic development of artifacts, for column and shear wall, beam and reduction, the stiffness of coupling beam stiffness reduction factor is 0, respectively. 7, 0. 6, 0. 35, 0. 2. When calculating the structure of the quality, the calculation method of the Chinese specification of 1. The dead load + 0 0. 5 live load ( 0. 5 for commonly used live load calculation of gravity load representative value coefficient. The calculation method of the specification only consider 1. 0 dead load, do not consider the live load, live load but partition press 1. 0 consider included in the constant load coefficient.