建筑垃圾再生骨料无机混合料的力学及抗冻性能

Mechanical and Frost Resistance of Inorganic Binder Stabilized Construction WasteRecycled Aggregate

道路基层、底基层在使用无机混合料时对其强度要求较低,将建筑垃圾再生骨料用于无机混合料是当前建筑垃圾资源化的一种有效途径。本工作研究了胶凝材料和再生骨料组成对无机混合料力学及抗冻性能的影响。结果表明,水泥掺量、再生骨料中混凝土颗粒含量的增加可提高无机混合料强度,在胶凝材料总量不变的前提下降低石灰掺量可提高无机混合料强度,再生骨料无机混合料的回弹模量为2775~3375 MPa,冻后残留抗压强度比最高可以达到88.4%。

The road base layer and subbase layer have lower requirements for their strength when using inorganic binder stabilized aggregate.The use of recycled construction waste aggregates forinorganic binder stabilized aggregate is an effective way to recycle construction waste.In this paper,the effects of the composition of cementitious materials and recycled aggregates on the mechanical properties and frost resistance of inorganic binder stabilized aggregate were studied.The results show that the increase of cement content and the content of concrete particles in the recycled aggregate can increase the strength of the inorganic binder stabilized aggregate.Under the premise of the same total amount of gelling material,reducing the amount of lime can increase the strength of the inorganic binder stabilized aggregate.The rebound modulus value of the material is 2775—3375 MPa,and the maximum residual compressive strength ratio after freezing can reach 88.4%.