The road sector is actively exploring strategies to reduce greenhouse gas emissions by investigating the potential use of local and recycled materials, including quarry waste sand. This study presents the results of frost heave and repeated load triaxial tests conducted on fully characterized Norwegian quarry waste sands. The tests examined the effects of two nontraditional additives, lignosulfonate and organosilane, on the engineering properties of the quarry waste sands. Thermal conductivity tests were also performed on untreated samples. The quarry waste sands, including gneiss, gabbro, quartz-diorite, limestone, and granite, exhibited varying fine contents ranging from 7% to 28%. A thermal conductivity model was validated with R values ranging from 0.87 to 0.99. The frost susceptibility was found to be reduced by 65% in samples treated with 1% additive content, and further improvements of 85% at a 2% concentration. Moreover, the addition of 1.5% lignosulfonate or 0.5% organosilane significantly improved the resilient modulus, elastic stiffness, and resistance to permanent deformation in all samples. These findings highlight the improved frost protection and mechanical properties of the stabilized quarry waste sands, contributing to enhanced pavement stability and longevity. Furthermore, incorporating lignosulfonate additives in quarry waste sands offers a promising solution for environmentally sustainable road construction. Further research, including comprehensive field-testing and life-cycle cost analyses, is recommended to assess the economic, technical, and environmental aspects of these additives.

中文翻译：

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用两种非传统添加剂稳定的采石场废砂的机械和冷冻行为

道路部门正在积极探索减少温室气体排放的策略，通过调查当地和回收材料（包括采石场废砂）的潜在用途。本研究介绍了对挪威采石场废砂进行充分表征的冻胀和重复载荷三轴试验的结果。这些测试研究了两种非传统添加剂木质素磺酸盐和有机硅烷对采石场废砂工程性能的影响。还对未经处理的样品进行了热导率测试。采石场废砂包括片麻岩、辉长岩、石英闪长岩、石灰岩和花岗岩，细粒含量从 7% 到 28% 不等。热导率模型经过验证，R 值范围为 0.87 至 0.99。研究发现，添加剂含量为 1% 的样品，抗冻性降低了 65%，浓度为 2% 时，抗冻性进一步提高了 85%。此外，添加 1.5% 木质素磺酸盐或 0.5% 有机硅烷显着提高了所有样品的弹性模量、弹性刚度和抗永久变形能力。这些发现凸显了稳定采石场废砂的防冻保护和机械性能得到改善，有助于提高路面稳定性和使用寿命。此外，在采石场废砂中加入木质素磺酸盐添加剂为环境可持续的道路建设提供了一种有前途的解决方案。建议进行进一步的研究，包括全面的现场测试和生命周期成本分析，以评估这些添加剂的经济、技术和环境方面。