Design and durability analysis of marine concrete

Xirui Zhao,Huaxi Gao,Wei Fan,Jinglong Hou,Ziqi Shang,Yue Duan

doi:10.1088/1755-1315/560/1/012035

Abstract

Marine engineering is an important way for a country to go deep blue. In the marine environment, there are many factors that affect the durability of concrete, among which the most harmful one is chloride ion erosion. In order to improve the ability to resist chloride ion permeation, this paper designs, compares and selects the appropriate water cement ratio of marine concrete, with the use of new anticorrosive technologies such as epoxy coating and silane impregnation. The design service life and the chloride ion diffusion coefficient prediction are analysed by establishing models, and this paper verifies whether the engineering design meets the service life requirement.

Highlights

In offshore engineering, concrete in marine environment works in a very complex environment
There are many factors that affect the durability of concrete, among which the most harmful one is chloride ion erosion
It is affected by many erosion factors, the most common failure modes that affect the durability of concrete are carbonization, salts erosion dominated by chloride ion erosion, freeze-thaw cycle and alkali aggregate reaction

Summary

Introduction

Concrete in marine environment works in a very complex environment It is affected by many erosion factors, the most common failure modes that affect the durability of concrete are carbonization, salts erosion dominated by chloride ion erosion, freeze-thaw cycle and alkali aggregate reaction. 2.1 Design service life of concrete structure Project A of the Bridge engineering is an important link between the island and the interior, it is an important node for the expressway network to communicate between the island and the inland. 2.2 Design and selection of marine concrete According to the Technical Code for Anticorrosion of Concrete Structures in Seaport Engineering, as the concrete for pile foundation used in marine environment: the lowest concrete strength grade is C25, the maximum water cement ratio is 0.50, and the minimum concrete cement consumption is 300 kg/m3.

Rust inhibitor

Complex and difficult