为了实现室内试验与生产实际相协调的水泥稳定碎石基层材料配合比设计试验,发挥室内试验结果对现场施工的指导作用,在分析了传统《半刚性基层配合比设计试验》存在的问题的基础上,基于生产实际与室内试验相协调的原则,调整了课程目标；根据课程的新目标,开发了振动拌合、振动成型和抗冲刷设备,提出了标准试验参数,并对抗冲刷试验进行了数值模拟,明确了被冲刷试件冲刷应力分布,作为学生抗冲刷试验分析基础；通过对三组不同配合比设计试验方法物理指标的分析,使学生明确了最佳含水量的物理意义和三种方法对最大干密度的有影响；三组不同试验方法力学指标试验结果表明,采用振动拌合+振动成型的A组,抗压强度平均提高2Mpa；可以节约水泥1.3%,通过分析,使学生明确了不同试验方法对强度的影响和产生这种影响的机理；不同水泥剂量下水泥稳定碎石抗冲刷试验表明,随着水泥剂量的增加,质量损失在减小,在确设计水泥剂量时要兼顾功能性指标,数值模拟可很好的解释试验现象。基于新目标的《半刚性基层配合比设计试验》课程,使学生明确了配合比设计的本质,不但要满足强度要求,还要兼顾功能指标,不但培养了学生的动手能力,还大幅度培养了学生分析问题和解决问题能力。

In order to achieve the coordination of cement treat gravel base(CTGB) material mix proportion design between indoor experiment laboratory test, and production practice test results play the role of guidance to field construction, base on the analysis of the traditional course "mix proportion design of semi-rigid base test ", the course objectives were adjusted on the basis of the principle of production practice in harmony with indoor test;According to the new objective of the course, the equipment of vibration mixing, vibration molding and anti-scour was developed, standard test parameters were proposed, and numerical simulation of anti-scour test was carried out. The scour stress distribution of the scour specimen was clarified, which was used as the basis of analysis of anti-scour test for students.Through the analysis of the physical indexes of three groups of different mix ratio design test methods, the students have made clear the physical significance of the optimal water content and the influence rule on the maximum dry density by the three methods.The mechanical index test results of three different test methods showed that the compressive strength average increase of 2MPa was obtained in group A, which was by vibration mixing and vibration molding.It can save the cement by 1.3%. Through the analysis, the students have made clear the influence of different test methods on the strength and the mechanism of the influence.The scour resistance test of CTAB under different cement dosages shows that the mass loss decreases with the increase of cement dosages. Functional indexes should be taken into account when determining the cement dosages. Numerical simulation results can well explain the test phenomenon.Based on the new goals of the "semi-rigid base mix design experiment" course, so that the students clear mix design essence, it is not only to meet the strength requirements, but also to take into account the functional indicators, new goals are not only cultivate students" practical ability, but also largely cultivate students" ability to analyze and solve problems.