... 4.Strength retention rate> 90%, elongation <1%, the durability of more than 50 years5.Good dimensional stability, stiffness, smoothness an ... . Strength retention rate> 90%, elongation <1%, the durability of more than 50 years. High elastic modulus 80.4Gpa, is ... as brick, light wood, prefabricated structure) of treatment or caused by a variety of expansion coefficient of wall crack and break . 3. 145g ...