Study on the properties of sea sand concrete

Abstract

Sea sand concrete is a kind of concrete in which mixed sea sand as fine aggregate, which is large-scale application in the coastal areas in recent years, especially in Ningbo area. The sea sand solves the problem of river sand shortage, coupled with cheaper price, most of the ready-mixed concrete companies are willing to use desalted sea sand instead of river sand. Many companies even are using sea sand without any treatments. The history of using sea sand in our country is very short, so the durability of the sea sand concrete need to be tested by many projects in the future, along with the development of science and technology and the invention of precision instruments, the durability of sea sand concrete will be adequate assurance. Ningbo area has a wide range usage of sea sand concrete. By measuring the strength of sea sand concrete with fly ash, finding out the law of strength for the sea sand concrete by the presence of fly ash.At the same time, we used electron scanner to analysis the sea sand concrete internal microstructure, researched the influence of chlorine salts on sea sand concrete micro-structural features.