Experimental study on using sea sand and fly ash for production of marine concrete in Vietnam

Abstract

This paper presents the experimental results on the properties and durability of concrete using sea sand and fly ash. The study performed an evaluation on concrete using as-recieved sea sand, washed (desalted) seasand as fine aggregate and partially replaced cement with fly ash as a mineral additive. The properties of concrete are evaluated including assessment of concrete mix properties, mechanical properties and durability of concrete such as compressive strength, elastic modulus, impermeability, sulphate resistance, and shrinkage of concrete. Research results show that concrete using washed sea sand has the same or better quality than that of conventional river sand concrete. The tested concrete mixes using washed sea sand meet the technical requirements for practical application. Using sea sand in combination with fly ash is effective in increasing workability and durability such as impermeability and sulphate resistance of the
concrete.

Keywords: Seasand concrete; seasand; fine aggregate; mechnical properties; durability.