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Consequences of aircraft operating conditions at military airbases: degradation of ordinary mortar and resistance mechanism of acrylic and silica fume modified cement mortar
Road Materials and Pavement Design ( IF 3.4 ) Pub Date : 2020-09-23 , DOI: 10.1080/14680629.2020.1820892
Sukanta Kumer Shill 1, 2 , Safat Al-Deen 1 , Mahmud Ashraf 3, 4 , M. G. Rashed 1 , Wayne Hutchison 5
Affiliation  

Concrete pavements at military airbases are often subjected to extreme aircraft operating conditions such as exposure to high thermal shocks and hydrocarbon fluids, which cause premature degradation and loss of strength. As part of this research project, we replicated aircraft operating circumstances, and investigated their consequences on plain cement mortar as well as on a special type of cement mortar that was prepared using cement, acrylic emulsion (AE) and silica fume (SF). All mortar specimens were repetitively exposed to aircraft operating conditions, which involved the application of aviation oils and high temperature for a short period, both separately and simultaneously. Although AE and SF modified fresh mortar showed saponification during the initial stage of hydration and had a detrimental effect on the compressive strength; the modified cement mortar showed significantly better resistance to the considered harsh conditions as determined by the residual compressive strength. Moreover, the crystalline minerals in AE and SF modified cement mortar were less attacked, decomposed, and found more durable compared to the plain mortar under the extreme conditions. Thus, the study elucidates the degrading mechanisms of plain cement mortar and the added resisting mechanisms of better performing AE and SF modified cement mortar under a replicated military airbase circumstances. This study also suggests limiting the dosage of AE into cement mortar to limit the observed negative impact on compressive strength.



中文翻译:

军用空军基地飞机运行条件的后果:普通砂浆的降解与丙烯酸和硅粉改性水泥砂浆的阻力机理

军事空军基地的混凝土路面经常受到极端的飞机操作条件的影响,例如暴露在高热冲击和碳氢化合物流体中,这会导致过早退化和强度损失。作为该研究项目的一部分,我们复制了飞机运行环境,并研究了它们对普通水泥砂浆以及使用水泥、丙烯酸乳液 (AE) 和硅粉 (SF) 制备的特殊类型水泥砂浆的影响。所有迫击炮样本都反复暴露于飞机操作条件下,其中包括在短时间内分别和同时使用航空油和高温。虽然AE和SF改性新拌砂浆在水化初期表现出皂化作用,对抗压强度产生不利影响;根据残余抗压强度确定,改性水泥砂浆对所考虑的恶劣条件显示出明显更好的抵抗力。此外,在极端条件下,AE 和 SF 改性水泥砂浆中的结晶矿物质受到较少的侵蚀、分解,并且比普通砂浆更耐用。因此,该研究阐明了普通水泥砂浆的降解机制以及在复制的军事空军基地环境下性能更好的 AE 和 SF 改性水泥砂浆的附加抵抗机制。该研究还建议限制 AE 在水泥砂浆中的用量,以限制观察到的对抗压强度的负面影响。在极端条件下,AE 和 SF 改性水泥砂浆中的结晶矿物质受到较少的侵蚀、分解,并且与普通砂浆相比更耐用。因此,该研究阐明了普通水泥砂浆的降解机制以及在复制的军事空军基地环境下性能更好的 AE 和 SF 改性水泥砂浆的附加抵抗机制。该研究还建议限制 AE 在水泥砂浆中的用量,以限制观察到的对抗压强度的负面影响。在极端条件下,AE 和 SF 改性水泥砂浆中的结晶矿物质受到较少的侵蚀、分解,并且与普通砂浆相比更耐用。因此,该研究阐明了普通水泥砂浆的降解机制以及在复制的军事空军基地环境下性能更好的 AE 和 SF 改性水泥砂浆的附加抵抗机制。该研究还建议限制 AE 在水泥砂浆中的用量,以限制观察到的对抗压强度的负面影响。该研究阐明了普通水泥砂浆的降解机制以及在复制的军事空军基地环境下性能更好的 AE 和 SF 改性水泥砂浆的附加抵抗机制。该研究还建议限制 AE 在水泥砂浆中的用量,以限制观察到的对抗压强度的负面影响。该研究阐明了普通水泥砂浆的降解机制以及在复制的军事空军基地环境下性能更好的 AE 和 SF 改性水泥砂浆的附加抵抗机制。该研究还建议限制 AE 在水泥砂浆中的用量,以限制观察到的对抗压强度的负面影响。

更新日期:2020-09-23
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