水泥稳定碎石基层材料设计试验教学改革  

Teaching reform of cement treat aggregate base material design experiment

作　　者：王龙[1] 解晓光[1] WANG Long;XIE Xiaoguang(School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150090,P.R.China)

机构地区：[1]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090

出　　处：《高等建筑教育》2022年第4期167-176,共10页Journal of Architectural Education in Institutions of Higher Learning

基　　金：2019—2021年哈尔滨工业大学教改项目。

摘　　要：为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,在分析传统半刚性基层配合比设计试验存在的问题基础上,基于生产实际与室内试验相协调的原则,调整课程目标,开发了振动拌合、振动成型和抗冲刷设备,提出标准试验参数,并对抗冲刷试验进行数值模拟,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。通过物理指标的分析,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影响;通过力学指标的分析,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;通过抗冲刷试验与分析,明确了设计水泥剂量指标和数值模拟作用。基于新目标的半刚性基层配合比设计试验课程,使学生理解了配合比设计的本质,在技术要求层面,不但能满足强度要求,还要兼顾功能性指标,在试验设计方面,不但要遵从规范,还要有创新精神。In order to achieve the coordination of cement treat aggregate base(CTAB)material mix proportion design between indoor experiment laboratory test and production practice,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 physical index data,the students have made clear the physical significance of the optimum water content and the influence of three methods on the maximum dry density.Through the analysis of the mechanical index data,the students have made clear the influence of different test methods on the strength and the mechanism of producing this influence.Through the anti-scour test,the students are made clear that the functional indexes should be considered when determining the design cement dosage,and the numerical simulation can explain the test phenomenon well.Based on the new objectives of semi-rigid base mix design experiment,students understand the nature of mix design,in the level of technical requirements,it is not only to meet the intensity requirements,but also take into account the functional indicators,in the aspect of test design,not only to comply with the norms,but also have the spirit of innovation.

关 键 词：试验教学 水泥稳定碎石 配合比设计 课程目标 

分 类 号：G642.423[文化科学—高等教育学] TU5[文化科学—教育学]