An investigation of using seawater as mixing water for alkali-activated slag pastes

被引:0
|
作者
Alaa M. Rashad
Mervat H. Khalil
机构
[1] Housing and Building National Research Center (HBRC),Building Materials Research and Quality Control Institute
[2] Shaqra University,Civil Engineering Department, College of Engineering
[3] Housing and Building National Research Center (HBRC),Building Physics and Environmental Research Institute
来源
关键词
Seawater; Tap water; Alkali-activated slag; Flowability; Compressive strength; Microstructure;
D O I
暂无
中图分类号
学科分类号
摘要
Recently, freshwater is under stress due to population growth, change of climate, urbanization and industrialization. World Meteorological Organization expected that 5 billion people will be in a shortage of even freshwater for drinking. In fact, it is difficult to get freshwater in some areas. In the construction field, concrete consumes about 2 billion tonnes of freshwater annually. Among possible ways to mitigate the demand of freshwater, seawater (SW) can be used as mixing water for concrete, mortar and paste instead of tap water (TW). This research is an attempt to use SW as mixing water for alkali-activated slag paste mixtures activated by different concentrations of NaOH. Mixing TW was partially replaced with SW at ratios of 50%, 75% and 100%, by weight. The flowability of different mixtures containing different contents of SW was determined. Compressive strength ranging from 3 days up to 365 days was measured. The results showed high flowability and compressive strength when SW was used as mixing water. The rates of enhancement of compressive strength at the early ages were higher than those at the later ages. The process of polymerization of the samples mixed with SW was accelerated as confirmed by thermogravimetric analysis, while the microstructure was modified as confirmed by scanning electron microscopy analysis.
引用
收藏
相关论文
共 50 条
  • [1] An investigation of using seawater as mixing water for alkali-activated slag pastes
    Rashad, Alaa M.
    Khalil, Mervat H.
    INNOVATIVE INFRASTRUCTURE SOLUTIONS, 2022, 7 (02)
  • [2] A Preliminary study on the use of magnetic, Zamzam, and sea water as mixing water for alkali-activated slag pastes
    Rashad, Alaa M.
    Ezzat, Mohamed
    CONSTRUCTION AND BUILDING MATERIALS, 2019, 207 : 672 - 678
  • [3] Effects of natural seawater mixing on the properties of alkali-activated slag binders
    Ren, Jie
    Sun, Hongfang
    Cao, Kun
    Ren, Zhili
    Zhou, Bo
    Wu, Wenshen
    Xing, Feng
    CONSTRUCTION AND BUILDING MATERIALS, 2021, 294
  • [4] Underwater carbonation of alkali-activated slag pastes
    Liu, Chen
    Zhang, Yu
    Liang, Minfei
    Li, Zhenming
    Ye, Guang
    CONSTRUCTION AND BUILDING MATERIALS, 2024, 445
  • [5] Properties and durability of alkali-activated slag pastes immersed in sea water
    El-Didamony, Hamdy
    Amer, Ahmed A.
    Abd Ela-ziz, Hamdy
    CERAMICS INTERNATIONAL, 2012, 38 (05) : 3773 - 3780
  • [6] Influence of seawater on alkali-activated slag concrete
    Yubin Jun
    Jae Hong Kim
    Seong Ho Han
    Taewan Kim
    Materials and Structures, 2021, 54
  • [7] Influence of seawater on alkali-activated slag concrete
    Jun, Yubin
    Kim, Jae Hong
    Han, Seong Ho
    Kim, Taewan
    MATERIALS AND STRUCTURES, 2021, 54 (03)
  • [8] Adsorption of superplasticizer admixtures on alkali-activated slag pastes
    Palacios, M.
    Houst, Y. F.
    Bowen, P.
    Puertas, F.
    CEMENT AND CONCRETE RESEARCH, 2009, 39 (08) : 670 - 677
  • [9] Adsorption of Calcium Lignosulphonate Water Reducer on Alkali-activated Slag Cement Pastes
    Yang, Chang-hui
    Pan, Qun
    Zhou, Huan
    RESEARCH EFFORTS IN MATERIAL SCIENCE AND MECHANICS ENGINEERING, 2013, 681 : 7 - 10