Open Access

ARTICLE

Analysis on Pore Structure of Non-Dispersible Underwater Concrete in Saline Soil Area

by Fang Liu¹, Baomin Wang^2,*, Mengsai Wang², Xiaosa Yuan¹

1 Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi’an, 710123, China
2 School of Civil Engineering, Dalian University of Technology, Dalian, 116023, China

* Corresponding Author: Baomin Wang. Email:

(This article belongs to the Special Issue: Renewable building materials and properties)

Journal of Renewable Materials 2021, 9(4), 723-742. https://doi.org/10.32604/jrm.2021.013664

Received 16 August 2020; Accepted 16 October 2020; Issue published 01 February 2021

Abstract

In this paper, mercury intrusion porosimetry (MIP) is used to test the pore structure of non-dispersible underwater concrete so as to study the influence of pouring and curing environment, age and slag powder on the pore characteristics of concrete, analyze the pore characteristics, porosity and pore distribution of concrete in different hydration stages, and reveal the relationship between pore structure and permeability of concrete. The results show that the pore-size distribution of concrete in fresh water condition is better than that in sulfate environment and mixed salt environment, and therefore, sulfate as well as mixed salt are not conducive to the development of pore structure of non-dispersible underwater concrete; chlorine salt has little effect on the pore structure of non-dispersible underwater concrete; under the three conditions of sulfate, chlorine and mixed salt, the porosity of concrete mixed with slag powder is lower than that of concrete without slag powder. The results indicate that the addition of slag powder can ameliorate the pore size distribution of non-dispersed underwater concrete, reduce the porosity, and make the concrete structure more compact, which is beneficial to improve the permeability resistance of concrete at the macro level.

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