基于智能制造的CRTSⅢ型轨道板混凝土配合比优化研究

Research on Mix Ratio Optimization of CRTSⅢTrack Slab Concrete Based on Intelligent Manufacturing

为提高高速铁路CRTSⅢ型轨道板在智能制造生产过程中的效率和经济性,以满足轨道板大规模、机械化、智能化生产,分别设置掺合料为复合掺合料和磨细矿渣粉,开展轨道板混凝土配合比优化试验研究,并验证现有自动蒸养系统在大规模智能制造轨道板生产中的适用性。研究结果表明,在满足CRTSⅢ型轨道板混凝土设计要求的前提下,若以早期强度为主要考虑条件,推荐细骨料为复合掺合料、水胶比为0.30和细骨料为磨细矿渣粉、水胶比为0.29的混凝土配合比设计方案;若以经济性为主要考虑条件,推荐细骨料为磨细矿渣粉、水胶比为0.29的混凝土配合比设计方案。通过对轨道板内部、表层、环境温度进行测量,并与温度自动采集系统数据进行对比,可知测温系统可有效对蒸养温度进行实时监测,数据真实有效,现有自动蒸养系统可应用于大规模智能制造轨道板生产。

In order to improve the efficiency and economy of the high-speed railway CRTSⅢtrack slab in the intelligent manufacturing process,to meet the large-scale,mechanized and intelligent production of track slabs,the admixtures were set as composite admixtures and ground slag powder respectively,and an experimental study on the optimization of the concrete mix ratio of the track slab was carried out.The applicability of the existing automatic steam curing system in the production of large-scale intelligent manufacturing track slabs is verified.The research results show that under the premise of meeting the design requirements of CRTSⅢtrack slab concrete,if the early strength is the main consideration,the recommended concrete mix ratio design scheme is that the fine aggregate is a composite admixture,the water-binder ratio is 0.30,it is also recommended the fine aggregate is ground slag powder,and the water-binder ratio is 0.29.If economy is the main consideration,it is recommended that the fine aggregate is ground slag powder and the concrete mix ratio design plan is 0.29.By measuring the internal,surface and ambient temperature of the track plate,and comparing with the data of the automatic temperature acquisition system,it can be seen that the temperature measurement system can effectively monitor the steam curing temperature in real time,and the data is real and effective.The existing automatic steam curing system can be applied to the production of large-scale intelligent manufacturing track slabs.