基于室内振动搅拌的水泥稳定碎石性能研究

振动搅拌技术可使水泥更好地分散在水泥稳定碎石混合料中，并且使混合料的强度得到一定程度的提高，从而增加了半刚性基层的路用性能，但是，水泥稳定碎石混合料的拌和设备是工地施工中的大型振动搅拌机，进行水泥稳定碎石配合比设计时尚无室内振动拌和设备可用，以致于无法准确分析振动拌和与非振动拌和水泥稳定碎石的技术指标。针对此问题，结合实际工程项目，对室内集料击振筛进行改装，以模拟水泥稳定碎石的工地生产振动拌和设备。通过一系列试验建立改装的室内振动拌和设备与工地振动拌和设备的等效关系。研究内容包括：室内振动搅拌机的原理与参数分析，室内振动搅拌的水泥稳定碎石配合比设计，室内与工地振动搅拌的水泥稳定碎石无侧限抗压强度对比等。研究结果表明：室内振动拌和的水泥稳定碎石配合比设计结果优于工地振动拌和的设计结果，而且水泥稳定碎石无侧限抗压强度大于工地振动搅拌机拌和混合料的抗压强度；根据试验结果得出了改装的室内振动拌和设备对水泥稳定碎石混合料的最佳拌和时间，使改装的室内振动搅拌机达到了工地大型振动搅拌机的同样效果，可应用于水泥稳定碎石的配合比设计与施工。

Study on Performance of Cement-stabilized Crushed Stone Based on Indoor Vibration Mix

Vibration mixing technology has been used in the domestic design and construction of the base materials of cement-stabilized crushed stone. Vibration mixing technology is effective for cement-stabilized macadam mixture mixing, causing cement to be better dispersed in the mixtures; consequently, it has been widely applied. However, the mixing equipment for cement-stabilized macadam mixtures is a large vibration mixer on the construction site. Thus, in the proportion design of cement-stabilized crushed stone, there are no indoor vibration mixing equipment, and it is not possible to accurately analyze the indices of cement-stabilized crushed stone between vibration mixing and non-vibration mixing. In relation to practical projects, the objective of this study is attempt the simulation of the vibration mixing equipment of cement-stabilized crushed stone on site by the modification of the indoor aggregate vibration sieve. Through a series of tests, the equivalent relationship between the modified indoor vibration mixing equipment and vibration mixing equipment on site is established. The research contents include:principle and parametric analysis of the indoor vibration mixer, proportion design of cement-stabilized crushed stone based on indoor vibration mixing, and comparative analysis of the compressive strength of cement-stabilized crushed stone between indoor vibration mixing and vibration mixing on site. The research results show that the proportion design of cement-stabilized crushed stone by performing indoor vibration mixing is better than that with vibration mixing on site, and the unconfined compressive strength of the cement-stabilized crushed stone obtained by indoor vibration mixing is larger than that by vibration mixing on site. According to the test results, the optimum mixing time is achieved with the modified indoor vibration mixing equipment for the cement-stabilized macadam mixture. The modified indoor vibration mixer reaches the efficiency of the vibration mixer on site and achieves satisfactory results. Thus, vibration mixing technology can be applied in the proportion design and construction of cement-stabilized crushed stone.