Sulfate resistance of alkali-activated slag/Portland cement mortar produced with lightweight pumice aggregate

被引：43
|
作者：
Dener, Murat [1 ,2 ]
Karatas, Mehmet [1 ]
Mohabbi, Mehrzad [2 ]
机构：
[1] Firat Univ, Civil Engn Dept, TR-23100 Elazig, Turkey
[2] Bingol Univ, Civil Engn Dept, TR-12000 Bingol, Turkey
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 304卷
关键词：
Alkali-activated cement; Portland cement; Slag; Sulfate resistance; Lightweight aggregate; MECHANICAL-PROPERTIES; COMPRESSIVE STRENGTH; FLY-ASH; SLAG; GEOPOLYMERS; DURABILITY; ATTACK;
D O I：
10.1016/j.conbuildmat.2021.124671
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this study sulfate resistance of alkali-activated slag/Portland cement mortar produced with lightweight pumice aggregate was investigated. Slag was partly replaced with Portland cement at levels of 0 and 15% by weight. Alkali activator was prepared with a mix of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH). The resistance to sulfate attack was investigated by exposing the mortar samples to 5% magnesium sulfate (MgSO4) and 5% sodium sulfate (Na2SO4) solutions for 1, 3 and 6 months, after which change in compressive strength and mass were determined. Microstructural deteriorations caused by sulfate attack were analyzed by FTIR. Excessive physical deterioration was observed in the mortars immersed in MgSO4 solution, but not in samples immersed in Na2SO4 solution. After all immersion periods in Na2SO4 solution, the compressive strength of both PC-free and 15% PC substituted mortars increased. This increase was higher in PC-free mortars. The compressive strength of mortars immersed in MgSO4 solution started to decrease from the 1st month of exposure.
引用
收藏
页数：8
相关论文
共 50 条
  • [21] Investigation of fire and chemical effects on the properties of alkali-activated lightweight concretes produced with basaltic pumice aggregate
    Saridemir, Mustafa
    Celikten, Serhat
    CONSTRUCTION AND BUILDING MATERIALS, 2020, 260
  • [22] Cracking resistance and sustainability assessment of alkali-activated slag concrete incorporating lightweight aggregate
    Zheng, Xiaoyan
    Liu, Huanghai
    You, Shengjie
    Easa, Said
    Cheng, Kejia
    Chen, Zongyan
    Ji, Tao
    CEMENT & CONCRETE COMPOSITES, 2022, 131
  • [23] Comparison of alkali–silica reactions in alkali-activated slag and Portland cement mortars
    Zhenguo Shi
    Caijun Shi
    Rui Zhao
    Shu Wan
    Materials and Structures, 2015, 48 : 743 - 751
  • [24] Effects of red mud and Alkali-Activated Slag Cement on efflorescence in cement mortar
    Kang, Suk-Pyo
    Kwon, Seung-Jun
    CONSTRUCTION AND BUILDING MATERIALS, 2017, 133 : 459 - 467
  • [25] Pottery Sand as Fine Aggregate for Preparing Alkali-Activated Slag Mortar
    Jiao, Zhenzhen
    Wang, Ying
    Zheng, Wenzhong
    Huang, Wenxuan
    ADVANCES IN MATERIALS SCIENCE AND ENGINEERING, 2018, 2018
  • [26] Alkali-silica reaction of ferronickel slag fine aggregate in Portland cement and alkali-activated slag mortars: Pessimum effect investigation
    Qian, Yuanshun
    Xu, Cheng
    Yang, Tao
    Yu, Haiyang
    Zhou, Guoyin
    Zhuang, Peizhi
    JOURNAL OF BUILDING ENGINEERING, 2024, 89
  • [27] Experimental study of high-temperature resistance of alkali-activated slag crushed aggregate mortar
    Huang, Wenxuan
    Wang, Ying
    Zhang, Yaming
    Zheng, Wenzhong
    JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2023, 23 : 3961 - 3973
  • [28] Studies on alkali-aggregate reaction of alkali-activated slag cement mortars
    Yang, Changhui
    Pu, Xincheng
    Wu, Fang
    Kuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society, 1999, 27 (06): : 651 - 657
  • [29] Resistance of alkali-activated slag concrete to alkali-aggregate reaction
    Bakharev, T
    Sanjayan, JG
    Cheng, YB
    CEMENT AND CONCRETE RESEARCH, 2001, 31 (02) : 331 - 334
  • [30] Comparison of alkali-silica reactions in alkali-activated slag and Portland cement mortars
    Shi, Zhenguo
    Shi, Caijun
    Zhao, Rui
    Wan, Shu
    MATERIALS AND STRUCTURES, 2015, 48 (03) : 743 - 751
12345