长江科学院院报 ›› 2020, Vol. 37 ›› Issue (2): 153-158.DOI: 10.11988/ckyyb.20181053

• 水工结构与材料 • 上一篇    下一篇

无约束多条件下钢渣水泥砂浆的长期干缩性能

王秀红1,2, 王俊3, 白建飞4, 晋强1, 朱琳1, 袁振1   

  1. 1.新疆农业大学 水利与土木工程学院,乌鲁木齐 830052;
    2.新疆昌吉职业技术学院 建筑工程学院,新疆 昌吉 831100;
    3.南京工业大学 土木工程分院,南京 210002;
    4.乌鲁木齐市建筑建材科学研究院,乌鲁木齐 830000
  • 收稿日期:2018-09-30 出版日期:2020-02-01 发布日期:2020-04-09
  • 通讯作者: 晋 强(1979-),男,新疆乌鲁木齐人,副教授,硕士,主要从事新型建筑材料研发工作。E-mail:xjnydxjq@126.com
  • 作者简介:王秀红(1992-),女,河南周口人,硕士研究生,主要从事新型建筑材料研究工作。E-mail:1203961408@qq.com
  • 基金资助:
    新疆维吾尔自治区优秀青年科技人才培养项目(2017Q023)

Long-term Drying Shrinkage Performance of Steel Slag Cement Mortar under Unconstrained Multi-condition

WANG Xiu-hong1,2, WANG Jun3, BAI Jian-fei4, JIN Qiang1, ZHU Lin1, YUAN Zhen1   

  1. 1.College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China;
    2.Department of Architectural Engineering, Changji Vocational Technical College, Changji 831100, China;
    3.School of Civil Engineering, Nanjing Tech University, Nanjing 211816, China;
    4.Urumqi Building Materials Science Research Institute, Urumqi 830000, China
  • Received:2018-09-30 Online:2020-02-01 Published:2020-04-09

摘要: 工业钢渣中含有部分C2S、C3S等矿物,具有与水泥熟料相似的胶凝性能,但因其含有一定量的f-CaO和f-MgO,掺量过大易引起安定性不良。为了更好地将钢渣细集料应用到水泥砂浆中,采用水泥胶砂干缩试验,研究其在不同养护条件及不同龄期下对水泥砂浆长期干缩性能的影响。试验结果表明:在标准养护条件下,单掺钢渣粉60%和单掺钢渣砂70%时,钢渣水泥砂浆的干缩率最小。复掺钢渣粉与钢渣砂时,观察到掺量控制在钢渣粉20%、钢渣砂40%和钢渣粉30%、钢渣砂60%时,钢渣水泥砂浆的干缩率最小。在恒温养护条件下,单掺钢渣粉35%与单掺钢渣砂40%时,水泥砂浆的长期干缩值最小。

关键词: 水泥砂浆, 钢渣粉, 钢渣砂, 干缩性能, 干缩率

Abstract: Industrial steel slag can be used as an additive in concrete as it contains such minerals as C2S and C3S which have similar gelling properties with cement clinker. Nevertheless, excessive dosage of industrial steel slag would result in inferior stability because it also contains f-CaO and f-MgO. To better utilize fine aggregate of steel slag in cement mortar, we performed drying shrinkage test to investigate the influence of steel slag on the long-term drying shrinkage performance of cement mortar at different curing ages under different curing conditions. Test results demonstrated that under standard curing condition, the drying shrinkage rate of cement mortar reached the lowest when added with 60% single steel slag powder, or 70% single steel slag sand, or 20% powder mixed with 40% sand, or 30% powder mixed with 60% sand; under constant temperature curing condition, the long-term dry shrinkage value of cement mortar was the lowest when 35% of steel slag powder was mixed with 40% steel slag sand.

Key words: cement mortar, steel slag powder, steel slag sand, drying shrinkage performance, drying shrinkage rate

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