碾压地聚合物混凝土与再生沥青路面材料混合

Avinash Talkeri , Raghuram Chinnabhandar , Harish Sagar
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引用次数: 0

摘要

碾压混凝土(RCC)的性能受材料配比、最佳含水率、配合比密度和不同于常规混凝土配合比的方法的影响很大。尽管碾压混凝土越来越受欢迎,但碾压混凝土混合料开发过程中的复杂现象限制了它的大规模应用。本研究采用振动锤(VH)、改性普罗托(MP)、振动台(VT)和压缩机(CM)等不同的压实技术,研制了含有碾压型地聚合物混凝土(RGC)的再生沥青路面(RAP),并与天然骨料的控制混合料进行了比较。最初,碱溶液如氢氧化钠(SH)和硅酸钠(SS)对物理性能的影响。在此期间,将研究第二阶段的力学性能,如干密度、压缩、弯曲和劈裂拉伸强度、弹性模量和微观结构性能。试验结果表明,碱溶液对压实力的影响较大。此外,RAP与粘结剂基体之间的粘结特性较差,对强度性能有显著影响。此外,各种压实技术影响了本文开发的混合料的力学性能。在与各种压实效果的比较中,VH和MP产生了相似的结果,而VT方法低估和高估了各种强度特性。虽然,CM方法报告了可比较的结果,但难以保持强度方面的一致性。因此,对于场密度,需要对影响混凝土性能的各参数进行优化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Roller-compacted geopolymer concrete mixes with recycled asphalt pavement material
The performance of roller compacted concrete (RCC) was greatly influenced by variations in material proportion, optimum moisture content, density of mixes and methodology adopted making it different from conventional concrete mixes. Even though RCC has gained popularity, the complex phenomenon involved in developing the RCC mixes limits it from large-scale applications. In this study, reclaimed asphalt pavement (RAP) incorporated roller-compacted geopolymer concrete (RGC) mixes were developed herein with different compaction techniques such as vibratory hammer (VH), modified proctor (MP), vibration table (VT) and compression machine (CM) are studied and compared with control mixes of natural aggregates. Initially, the effect of alkali solutions such as sodium hydroxide (SH) and sodium silicate (SS) on the physical properties. During, the second phase mechanical properties such as dry density, compressive, flexural and split-tensile strength, modulus of elasticity and microstructure properties will be investigated. The test results revealed that compaction efforts were greatly influenced by the alkali solution. Furthermore, the poor bond characteristics between RAP and the binder matrix had a significant effect on strength properties. Also, the various compaction techniques affected the mechanical properties of mixes developed herein. In Comparison with various compaction efforts, VH and MP produced comparable results, whereas the VT method underestimated and overestimated the various strength properties. Although, the CM method reports comparable results but difficult to maintain consistency in strength aspects. Therefore, optimization of various parameters influencing the concrete properties needs to be achieved for field density.
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