基于基床温度的水泥路面早龄期应力强度比分析

doi:10.3969/j.issn.16740696.2016.06.08

重庆交通大学学报（自然科学版） ›› 2016, Vol. 35 ›› Issue (6): 34-37.DOI: 10.3969/j.issn.16740696.2016.06.08

基于基床温度的水泥路面早龄期应力强度比分析

张艳聪¹，高玲玲²

(1. 山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点试验室，山西太原 030006；2. 山西水利职业技术学院道路与桥梁工程系，山西运城 044004)

收稿日期:2015-04-17 修回日期:2015-09-10 出版日期:2016-12-25 发布日期:2016-12-29
作者简介:张艳聪（1985—），男，河南鲁山人，工程师，博士研究生，主要从事路面结构与新材料方面的研究。Email：zuoyouan103@163.com。
基金资助:
国家自然科学基金项目(51308329)；山西省自然科学基金项目(20130110271,2015021115)；山西省交通运输厅科技项目(2013110,2015126)

StressStrength Ratio of Cement Pavement at Early Age Based on Base Temperature

ZHANG Yancong¹, GAO Lingling²

(1. Key Laboratory of Highway Construction & Maintenance in Loess Region, Shanxi Transportation Research Institute, Taiyuan 030006, Shanxi, P.R.China; 2. Department of Road & Bridge Engineering, Shanxi Conservancy Technical Institute, Yuncheng 044004, Shanxi, P.R.China)

Received:2015-04-17 Revised:2015-09-10 Online:2016-12-25 Published:2016-12-29

摘要/Abstract

摘要： 为探究板基床温度对水泥混凝土路面早龄期开裂的影响，在相同施工环境条件下向温度分别为10，15，20，25，30，35 ℃的基床上铺筑水泥混凝土面层，基于Hiperpav软件，分别测算铺筑72 h内路面板弯拉强度和最大主应力的发展规律，并比较其开裂风险。结果表明：基床温度越高，路面板弯拉强度形成越快，结构应力出现越早，且强度和应力均大于基床温度较低时，因此应选择基床温度较低时铺筑水泥混凝土面层；面层浇筑后的48 h内，基床温度差异对路面板结构应力的影响远大于弯拉强度，因此应重视该时段的外部养生，以降低基床温度高引起的开裂风险；面层混凝土终凝时，应力强度比达到第一次峰值，之后，环境温度逐渐取代基床温度成为影响强度应力比的主导因素，因此针对基床温度差异引起的开裂，其控制措施应在终凝前施加。

关键词: 道路工程, 基床温度, 应力强度比, 水泥混凝土路面, 早龄期开裂

Abstract: In order to explore the effect of base temperature on early cracking of concrete pavement slabs, the cement concrete surface was paved in the same construction environment on six kinds of bases whose temperature was 10, 15, 20, 25, 30, 35 ℃, and the development rules of flexural tensile strength and maximum principal stress of concrete slabs within 72 h after the pavement were calculated respectively based on the software Hiperpav. And the risks of cracking were also compared. The results show that: the higher the base temperature, the faster forming of slab flexural tensile strength and the earlier the structure stress; moreover, the strength and stress of slab in higher temperature are greater than in lower temperature; so, it is better to pave cement concrete surface when the base temperature is lower. Within 48 hours after paving, the impact of base temperature difference on structure stress is much greater than flexural tensile strength; so, the outside curing in this period should be paid attention in order to reduce the risk of cracking caused by the high base temperature. The stressstrength ratio reaches the first peak when the surface concrete is finally coagulated; and then, the ambient temperature replaces the base temperature and gradually becomes the dominant factor affecting the stressstrength ratio. Therefore, the control measures against the cracking caused by base temperature difference should be applied before the final coagulation.

Key words: highway engineering, base temperature, stressstrength ratio, cement concrete pavement, early cracking

中图分类号:

U416

张艳聪1，高玲玲2. 基于基床温度的水泥路面早龄期应力强度比分析[J]. 重庆交通大学学报（自然科学版）, 2016, 35(6): 34-37.

ZHANG Yancong1, GAO Lingling2. StressStrength Ratio of Cement Pavement at Early Age Based on Base Temperature[J]. Journal of Chongqing Jiaotong University(Natural Science), 2016, 35(6): 34-37.

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基于基床温度的水泥路面早龄期应力强度比分析

StressStrength Ratio of Cement Pavement at Early Age Based on Base Temperature

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