道路路面稳定基层材料最佳粉煤灰掺量的确定

IF 1.6 Q3 ENGINEERING, CIVIL Australian Journal of Civil Engineering Pub Date : 2021-03-28 DOI:10.1080/14488353.2021.1905250
D. Nguyen, V. P. Le
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引用次数: 3

摘要

摘要本研究对路面稳定底基层材料中粉煤灰含量进行了研究。采用无侧限抗压强度(UCS)试验、间接拉伸(IDT)试验和弹性模量试验,研究了用混合料总重量的17%、33%、50%粉煤灰含量部分替代水泥的效果,以评估稳定底基层材料的力学性能。研究表明,用33%的粉煤灰代替水泥可用于稳定底基层材料。此外,IDT和UCS强度、弹性模量和UCS之间有很强的关系,这是确定发展相关性的系数,分别为0.9和0.82。有人建议,IDT强度或弹性模量可以通过UCS测试来估计。最后,使用机械经验路面设计指南(MEPDG)程序评估了粉煤灰替代水泥的性能。根据研究结果,可以得出结论,与使用传统底基层材料相比,用33%的粉煤灰代替水泥可以显著提高性能寿命,并且施工成本可以降低23%左右。
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Determining optimum fly ash content for Stabilized subbase materials in road pavements
ABSTRACT The investigation of fly ash content for stabilized subbase materials in road pavements was presented in this study. The effects of partial replacement of cement by 17%, 33%, 50% of fly ash contents by total weight of mixture were investigated to evaluate mechanical properties of stabilized subbase materials using the unconfined compressive strength (UCS) test, indirect tensile (IDT) test, and resilient modulus test. It was found that the replacement of cement by 33% of fly ash can use for stabilized subbase material. In addition, a strong relationship between IDT and UCS strength, and resilient modulus and UCS is given which is the coefficient of determination of developed correlation to be 0.9 and 0.82, respectively. It was suggested that the IDT strength or the resilient modulus can be estimated from a UCS test. Finally, the performance of cement replacement with fly ash was evaluated using mechanistic empirical pavement design guide (MEPDG) program. Based on the results of the study, it can be concluded that the cement replacement with 33% fly ash can enhance the performance life significantly and the construction cost reduction can be around 23%, compared to using conventional subbase material.
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来源期刊
CiteScore
3.90
自引率
7.70%
发文量
31
期刊最新文献
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