Compressive Strength and Chloride Ion Penetration Resistance of SHCC Coated by PDMS-based Penetrating Water Repellency

ty10086 提交于 周四, 08/26/2021 - 12:52
文章英文标题
Compressive Strength and Chloride Ion Penetration Resistance of SHCC Coated by PDMS-based Penetrating Water Repellency
正文
聚二甲基硅氧烷( PDMS )渗透水性PDMS涂层的抗压强度和抗氯离子渗透性能;渗透水斥水性;SHCC;抗压强度;抗氯离子渗透性能。研究了PDMS的渗透深度、SHCC的强度以及SHCC的抗氯离子渗透性能。由于应用不同的应用方法时测量PDMS的穿透深度,证实所有方法均满足KS F 4930的要求。虽然浸泡法表现出最大的穿透深度,但考虑到现场应用的方便,喷雾法被认为比较合适。抗压强度试验表明,随着SHCC抗压强度的增加,PDMS的穿透深度减小。PDMS穿透深度大的M4 - A和M4 - B试件的抗压强度分别比未的M4试件分别降低9.6 %和8.0 %,PDMS穿透深度小的M1 - A和M1 - B试件的抗压强度比M1试件分别降低4 %和2.2 %。由此可以看出,随着PDMS渗透深度的增加,SHCC的强度降低速率增大。氯离子渗透试验表明,随着PDMS渗透深度的增加,氯离子渗透阻力增大。
文章内容(英文)
Compressive Strength and Chloride Ion Penetration Resistance of SHCC Coated by PDMS-based Penetrating Water RepellencyPDMS;Penetrating water repellency;SHCC;Compressive strength;Chloride ion penetration resistance;In this study, Polydimethylsiloxane (PDMS) was applied to Strain Hardening Cement Composites (SHCC) for penetrating water repellency. The penetration depth of PDMS, strength of SHCC, and chloride ion penetration resistance of SHCC were investigated. As a result of measuring penetration depth of PDMS when applying different application method, it was confirmed that all methods satisfied the requirements of KS F 4930. Although the immersion method showed the largest penetration depth, the spray method was considered to be more appropriate considering the ease of field application. Compressive strength tests showed that the penetration depth of PDMS decreased as the compressive strength of SHCC increased. The compressive strength of M4-A and M4-B specimens with large PDMS penetration depths decreased by 9.6% and 8.0%, respectively, compared with those of M4 specimens produced without PDMS. Compressive strengths of the M1-A and M1-B specimens with small PDMS penetration depths were reduced by 4% and 2.2%, respectively, compared with the M1 specimen. As a result, it can be seen that the strength reduction rate of SHCC increases as the penetration depth of PDMS increases. The chlorine ion penetration tests showed that the chlorine ion penetration resistance increases with the penetration depth of PDMS.
来源出处
Journal|[J]Journal of the Korea institute for structural maintenance and inspectionVolume 22, Issue 6. 2018. PP 16-23

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备注说明:

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