水泥稳定碎石材料干燥收缩研究综述

doi:10.13229/j.cnki.jdxbgxb20220175

摘要/Abstract

摘要：

为进一步研究水泥稳定碎石的干燥收缩行为，改善其在道路基层的抗开裂性能，针对水泥稳定碎石材料基层由于干燥收缩而引起沥青路面面层反射裂缝的问题，通过对现有资料与研究成果的总结，对水泥稳定碎石干燥收缩机理以及调控措施进行了综述。减少水泥用量，采用骨架密实级配类型，使用振动搅拌或者振动压实成型方式，添加橡胶、钢渣、纤维等改性剂可以有效减少水泥稳定碎石材料的干燥收缩，提高其收缩性能与路用性能。在此基础上分析了水泥稳定碎石的收缩机理、综合优化方法、干燥收缩测量评价方法以及收缩预估模型存在的问题，提出了水泥稳定碎石收缩性能研究的发展趋势与展望。

关键词: 道路与铁道工程, 干燥收缩, 综述, 水泥稳定碎石, 收缩调控措施

Abstract:

The objective of this study is to analyze the drying shrinkage behavior of cement-stabilized macadam（CSM） and improve its anti-cracking performance. In this paper， previous studies conducted on the mechanism of shrinkage and cracking in CSM and shrinkage mitigation strategies are reviewed， and summarized. The drying shrinkage performance of CSM materials is mainly studied through shrinkage mechanism and shrinkage prevention and improvement measures. As a cement-based material， the existing research on the drying shrinkage mechanism of CSM mainly refers to the available dry shrinkage mechanism of cement concrete. Four models are always used to characterize the shrinkage at different stages according to the change of relative humidity（RH） inside the mixture： capillary tension， surface free energy， disjoining pressure and interlayer water movement. The drying shrinkage mitigation strategies of CSM have achieved a series of results in recent years. According to the different mechanisms CSM shrinkage performance improvement methods can be classified into gradation， cement content， CSM molding method， and additive modification. The results show that reducing the amount of cement， adopting the skeleton of dense gradation， employing vibration stirring or vibration compaction， and adding rubber， steel slag， fiber or other modifiers can effectively reduce the drying shrinkage of CSM and improve its shrinkage performance and road serviceability. Additionally， the shrinkage mechanism， comprehensive optimization method， drying shrinkage measurement and evaluation method and shrinkage prediction model of CSM are assessed. The development trend and prospect of the shrinkage performance of CSM are generated.

Key words: highway and railway engineering, drying shrinkage, review, cement-stabilized macadam, shrinkage mitigation strategies

中图分类号:

U414

张阳,王傲鹏,张靖霖,马涛,陈思宇. 水泥稳定碎石材料干燥收缩研究综述[J]. 吉林大学学报(工学版), 2023, 53(2): 297-311.

Yang ZHANG,Ao-peng WANG,Jing-lin ZHANG,Tao MA,Si-yu CHEN. Dry shrinkage in cement⁃stabilized macadam： a review[J]. Journal of Jilin University(Engineering and Technology Edition), 2023, 53(2): 297-311.

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纤维类型	纤维长度/mm	掺量	干缩条件	水泥含量/%	龄期/d	效果/%	文献
聚酯纤维	50	0%~1.5%	T=20 ℃，RH=60%	4	25~40	5.9~27.2	［44］
聚乙烯醇纤维	12	0.9 kg/m³	T=20 ℃，RH=60%	3.6	100	9.6	［46］
	18					17.2
	24					24.0
	30					19.35
	12	0.6~1.2 kg/m³	T=20 ℃，RH=60%	3.2~4	90	8.38	［47］
	18					15.79
	24					22.49
	30					17.96
聚丙烯纤维	-	0.5%	T=20 ℃，RH=60%	5.3	90	16.7	［49］
	10~20	0.1%	T=40 ℃	5	-	42	［51］
	19	1.0%	T=20 ℃，RH=60%	5	7	20.2	［53］
玻璃纤维	6	0.15%	T=20 ℃，RH=50%	4	7	17.3	［55］
	12					31.5
	18					46.8
玄武岩纤维	25	0.1%	自然条件下	4	25	51	［56］
玄武岩纤维	12	0.05%	T=20 ℃，RH=60%	4	28	13.3	［59］

外掺剂种类	外掺剂含量/%	效果/%	文献
纳米层状材料	水泥的10%	20	［66］
建筑垃圾复合粉体材料	2.0	40	［67］
粉煤灰	5~10	41.1	［68］
沥青乳液	2~3	21.4	［71］
废旧沥青混合料	25	16.5	［72］
X型凹凸棒石黏土	水泥的5%	13.7	［73］
Y型凹凸棒石黏土	水泥的10%	7.4
Y型煅烧凹凸棒石黏土	水泥的15%	20.5
脱硫石膏	5.0	60	［74］
废弃食用油	-	15	［75］
城市垃圾焚烧飞灰	代替25%水泥	25.9	［76］

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