新型建筑材料2024，Vol.51Issue(9) ：30-34.

超低温环境下双掺粉煤灰及硅灰对砂浆力学性能的影响

The effect of double-doped fly ash and silica fume on the mechanical properties of mortar under ultra-low temperature environment

孔萌萌 崔云鹏 李洪斌 王一鹤 邓玉姣
新型建筑材料2024，Vol.51Issue(9) ：30-34.
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  • 万方数据

超低温环境下双掺粉煤灰及硅灰对砂浆力学性能的影响

The effect of double-doped fly ash and silica fume on the mechanical properties of mortar under ultra-low temperature environment

孔萌萌 1崔云鹏 2李洪斌 1王一鹤 1邓玉姣3
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作者信息

  • 1. 沈阳理工大学材料科学与工程学院,辽宁沈阳 110159
  • 2. 沈阳理工大学材料科学与工程学院,辽宁沈阳 110159;辽宁省交通规划设计院有限责任公司,辽宁沈阳 110111
  • 3. 芯恩(青岛)集成电路有限公司,山东青岛 266500
  • 折叠

摘要

研究了粉煤灰、硅灰2种矿物掺合料双掺在不同掺量下对超低温冻融循环(-190～20℃)后水泥砂浆抗压、抗折强度和抗冻性的影响规律.结果表明:在超低温冻融循环后,对水泥砂浆性能的劣化程度远大于低温冻融循环(-20～20 ℃);当粉煤灰掺量15％、硅灰掺量10％时,水泥砂浆力学性能最优,10次超低温冻融循环后,抗折、抗压强度分别达到10.06、38.29MPa;此时水泥砂浆强度的损失率最低,抗冻性最好;孔径达到最小为33.15 nm,孔隙率也是最小,为13.58％.

Abstract

In this paper,the influence of fly ash and silica fume on the compressive strength,flexural strength and frost resis-tance of cement mortar after ultra-low temperature freeze-thaw cycle(-190～20 ℃)was studied under different dosage of fly ash and silica fume.The results show that the deterioration degree of cement mortar after ultra-low temperature freeze-thaw cycle is much greater than that of low temperature freeze-thaw cycle(-20～20 ℃).Among them,when the double-doped fly ash is mixed with 15％and the silica fume is mixed with 10％,the mechanical performance of cement mortar is the best.After 10 super-low temperature freeze-thaw cycle,the flexural strength and compressive strength reach 10.06 MPa and 38.29 MPa respectively.At this time,the loss rate of cement mortar strength is the lowest and the frost resistance is the best;the pore size reaches a minimum of 33.15 nm,and the porosity is also a minimum of 13.58％.

关键词

超低温冻融循环/矿物掺合料/水泥砂浆/强度损失/抗冻性/孔隙结构

Key words

ultra-low temperature freeze-thaw cycle/mineral admixture/cement mortar/loss of strength/frost resistance/pore structure

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出版年

2024
新型建筑材料
中国新型建筑材料工业杭州设计研究院

新型建筑材料

CSTPCD
影响因子：0.569
ISSN：1001-702X
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