Abstract

Many geotechnical problems involve pavements in Algerian arid regions; the main among them being related to the scarcity of standard materials. Recently, numerous studies were carried out on the valorization of Saharan local materials for pavement design. In this context, dune sand, tuff and quarry waste are promising alternatives. In this study, the design of experiments was used to optimize formulations to meet the current unconfined compressive strength (UCS) recommendations according to grading distribution. For the studied local material, the use of UCS criterion extended the valid domain of formulations to poorly graded materials where the amount of dune sand could reach 54.5%. An optimal formulation was proposed and tested, composed of 46% dune sand, 36% tuff, 11% quarry waste and 7% water, fulfilling all current recommendations related to the pavement design in the Sahara region. Finally, the results show that the design of experiments can be a useful tool to optimize mixture formulations and valorize local materials such as dune sand.

摘要

许多岩土工程问题涉及阿尔及利亚干旱地区的路面；其中主要与标准材料的稀缺有关。最近，针对撒哈拉当地材料用于路面设计的价值进行了大量研究。在这种情况下，沙丘沙、凝灰岩和采石场废料是很有前景的替代品。在这项研究中，实验设计用于优化配方，以满足当前根据级配分布的无侧限抗压强度 ( UCS ) 建议。对于研究的本地材料，使用UCS标准将配方的有效范围扩展到沙丘沙量可能达到 54.5% 的低级配材料。提出并测试了一种最佳配方，由 46% 的沙丘沙、36% 的凝灰岩、11% 的采石场废料和 7% 的水组成，满足当前与撒哈拉地区路面设计相关的所有建议。最后，结果表明，实验设计可以成为优化混合物配方和评估沙丘等当地材料的有用工具。