机制砂高性能混凝土抗压强度研究

摘要

以C40机制砂高性能混凝土为研究对象，通过研究其3d、5d、7d、28d、56d的抗压强度变化，以及利用超声波法检测其超声声速，得出随着龄期的增加，机制砂高性能混凝土的强度逐渐增大，超声声速也增大。并拟合出机制砂混凝土超声声速与抗压强度的关系式。%This paper takes mechanism sand high performance concrete as its research object. By studying the 3 d,5 d,7 d,28 d,56 d compressive strength change,and using ultrasonic wave method to detect the ultrasonic velocity,it is concluded that with the increase of age,the intensity of mechanism sand high performance concrete increases gradually,and so is the ultrasonic velocity. Then the author fits the relation between mechanism sand concrete ultrasonic velocity and compressive strength.