[1]彭波,陈思燚,吴士园,等.基于温度域的水泥土稳定RAP混合料配合比设计[J].长安大学学报(自然科学版),2020,40(4):27-38.
　PENG Bo,CHEN Si yi,WU Shi yuan,et al.Mix proportion design of cementsoil stabilized RAP mixturebased on temperature domain[J].Journal of Chang’an University (Natural Science Edition),2020,40(4):27-38.
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基于温度域的水泥土稳定RAP混合料配合比设计()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第40卷
期数:
2020年4期
页码:
27-38
栏目:
道路工程
出版日期:
2020-07-15

文章信息/Info

Title:
Mix proportion design of cementsoil stabilized RAP mixturebased on temperature domain
作者:
彭波; 陈思燚; 吴士园; 杜冰洁; 龚志成
（1. 长安大学 公路学院，陕西 西安 710064； 2. 河南省城乡规划设计研究总院有限公司，河南 郑州 450044；3. 黄河勘测规划设计有限公司，河南 郑州 450003）
Author(s):
PENG Bo1;  CHEN Siyi1;  WU Shiyuan2;  DU Bingjie3;  GONG Zhicheng1
(1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. Henan Urban Planning andDesign Research Institute Co., Ltd., Zhengzhou 450044, Henan, China; 3. Yellow River EngineeringConsulting Co., Ltd., Zhengzhou 450003, Henan, China)
关键词:
道路工程; 回收沥青路面材料; 温度域; 灰土掺量; 强度标准; 配合比建议值
Keywords:
Key words:〖WTBZ〗road engineering;  RAP;  temperature domain;  lime soil content;  strength standard;  recommended value of mix proportion
文献标志码:
A
摘要:
为解决掺入灰土的水泥土稳定回收沥青路面材料(RAP)混合料基层强度不适用中国《公路沥青路面再生技术规范》（JTG/T 5521—2019）的问题，通过7 d无侧限抗压强度试验，研究不同温度下RAP掺量对水泥土稳定RAP混合料抗压强度的影响规律，提出基于温度域的水泥土稳定RAP基层强度标准值；分析温度对不同灰土掺量、水泥掺量、养生龄期下冷再生混合料性能的影响规律，提出基于温度域的水泥土稳定RAP混合料的强度标准及其配合比设计建议值。研究结果表明：对中、轻交通荷载等级公路，水泥土稳定RAP冷再生混合料无侧限抗压强度应不小于3.2 MPa；不同温度下水泥土稳定RAP混合料的无侧限抗压强度变化规律相近，即随RAP掺量增大而降低，RAP最佳掺量（质量分数，下同）为70%，水泥土稳定RAP混合料的无侧限抗压强度随灰土掺量增大而降低，且灰土的合理掺量范围为0%~40%；水泥的加入能够显著提高冷再生混合料的力学强度，且其前期强度增长较大，但随着水泥掺量的增加，其对混合料力学性能的增强效果逐渐减弱，水泥的掺量应控制在4.5%~5.5%；灰土的加入对冷再生混合料有不利影响，其冷再生混合料的力学强度逐渐降低，且灰土掺量在20%以下时，混合料的强度降低率较小，随着灰土掺量的增大，其力学强度的降低率增大，灰土的最佳掺量为10%~20%；水泥土稳定冷再生混合料的强度形成主要在初期，且灰土的加入对冷再生混合料的早期强度不利。
Abstract:
In order to solve the problem that the strength of cement stabilized RAP mixture base layer mixed with lime soil was not applicable to the technical specifications for highway asphalt pavement recycling (JTG/T 5521—2019) in China, the 7 d unconfined compressive strength test was used to study the compressive strength of cementsoil stabilized RAP mixture at different temperatures. Based on the influence law of strength, the strength standard of cementsoil stabilized RAP base layer based on temperature domain was proposed. The influence of temperature on the amount of lime soil, cement dosage and coldrecycled mixture in the ageing period were analyzed, the strength standard of the material were analyzed, and the recommended value of the mix design of the cementsoil stabilized RAP mixture based on the temperature domain was proposed. The results show that the unconfined compressive strength of cementsoil stabilized RAP cold recycled mixture should be no less than 2.9 MPa for secondary and below roads, the unconfined compressive strength of cementsoil stabilized RAP mixture at different temperatures is similar, which show a decrease when RAP content increase, and the optimal RAP content is 70%. The unconfined compressive strength of the cement stabilized RAP mixture decrease with the increase of the amount of lime soil, and the reasonable dosage range of the lime soil is 0% to 40%. The addition of cement can significantly improve the mechanical strength of the cold recycled mixture, and its early strength increases greatly, but as the cement dosage increases, its reinforcing effect on the mechanical properties of the mixture is gradually weakened, so the cement dose should be controlled from 4.5% to 5.5%, the addition of lime soil has an adverse effect on the cold recycled mixture. With the addition of lime soil, the mechanical strength of the cold recycled mixture gradually decreases, and when the amount of lime soil is below 20%, the rate of strength reduction is small. As the amount of lime soil increases, the reduction rate of mechanical strength is greater. Therefore, the optimum dosage of lime soil is 10% to 20%, the strength of cementsoil stabilized cold recycled mixture is mainly formed in the early days, and the addition of lime soil is detrimental to the early strength of the cold recycled mix. 6 tabs, 12 figs, 27 refs.

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更新日期/Last Update: 2020-07-31