不同硅微粉掺量对水工混凝土抗冻性能的影响
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福建林业职业技术学院建筑工程系智慧建造工程中心,福建 南平353000

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2021年福建省中青年教育科研项目(JAT210780)。


Effect of Different Silica Powder Contents on the Frost Resistance Performance of Hydraulic Concrete
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Intelligent Construction Engineering Center, Department of Architectural and Civil Engineering, Fujian Forestry Vocational Technical College, Nanping 353000, Fujian, China

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    摘要:

    为研究不同硅微粉掺量对水工混凝土抗冻性能的影响,以硅酸盐水泥、碎石、中砂、减水剂、硅微粉作为原材料制备水工混凝土试块,对0%、2.5%、5%、7.5%、10%硅微粉掺量的试块进行冻融循环试验、单轴压缩试验和动弹性模量试验。结果表明:随着冻融循环次数的增加,水工混凝土试块的抗压强度降低;掺入硅微粉可以有效提高水工混凝土的抗冻性,但硅微粉含量过高或过低都会影响其效果;当硅微粉掺量为5%时抗冻效果最佳,60次冻融循环次数下,抗压强度提高15.1%、质量损失率降低0.17%、相对动弹性模量提高0.014%。

    Abstract:

    In order to study the effect of different silica powder contents on the frost resistance performance of hydraulic concrete, hydraulic concrete test blocks were prepared with Portland cement, crushed stone, medium sand, water reducing agent and silica powder as raw materials. Freeze-thaw cycle tests, uniaxial compression tests and dynamic elastic modulus tests were carried out on the test blocks with 0%, 2.5%, 5%, 7.5% and 10% silica powder contents. The results show that the compressive strength of the hydraulic concrete test blocks decreases with the increase in the number of freeze-thaw cycles. Adding silica powder can effectively improve the frost resistance of hydraulic concrete, but the effect will be affected if the content of silica powder is too high or too low. When the silicon powder content is 5%, the frost resistance effect is the best. Under 60 freeze-thaw cycles, the compressive strength is increased by 15.1%, the mass loss rate is decreased by 0.17%, and the relative dynamic elastic modulus is increased by 0.014%.

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林乙玄.不同硅微粉掺量对水工混凝土抗冻性能的影响[J].西昌学院学报(自然科学版),2024,38(4):49-55.

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  • 收稿日期:2024-08-15
  • 最后修改日期:2024-09-30
  • 录用日期:2024-10-11
  • 在线发布日期: 2025-01-24