水泥稳定废弃石屑力学性能研究

Study on Mechanical Properties of Cement Stabilized Waste Stone Chips

为了研究废弃石屑作为路基填料或道路底基层集料的可行性,采用不同剂量的水泥对其进行处置,研究了水泥稳定废弃石屑的力学性质及其影响因素,并建立无侧限抗压强度、初始切线模量和加州承载比之间的相关性。结果表明:随着水泥剂量的增加,水泥稳定废弃石屑的力学性质线性增大,当水泥剂量为8%时,水泥稳定废弃石屑的抗压强度达到公路工程底基层强度要求;随着养生龄期的延长,水泥稳定废弃石屑的抗压强度先快速增长后趋于平缓;水泥稳定废弃石屑无侧限抗压强度与初始切线模量和CBR均呈现良好的线性相关关系,这些关系可用于道路基层或地基的设计与施工。

In order to study the feasibility of waste stone chips as roadbed filler or road subbase aggregate,different doses of cement were used to dispose it.The mechanical properties and influencing factors of cement stabilized waste stone chips were studied,and the correlation between unconfined compressive strength,initial tangent modulus and California bearing ratio was established.The results show that with the increase of cement dosage,the mechanical properties of cement stabilized waste stone chips increase linearly.When the cement dosage is 8%,the compressive strength of cement stabilized waste stone chips meets the strength requirements of highway engineering subbase.With the extension of curing age,the compressive strength of cement stabilized waste stone chips increases rapidly and then tends to be gentle.The unconfined compressive strength of cement stabilized waste stone chips has a good linear correlation with the initial tangent modulus and CBR,which can be used for the design and construction of road base or foundation.