Cracking Characteristics of Cement-Stabilized Macadam with Early Strength Agent under Variable Temperature and Humidity Curing Conditions

Authors

GE Dongdong, College of Transportation Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China ;National Engineering Research Center of Highway Maintenance Technology , Changsha , Hunan 410114 , China ;National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment (Changsha ), Changsha , Hunan 410114 , ChinaFollow
LIU Dingyuan, College of Transportation Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China ;National Engineering Research Center of Highway Maintenance Technology , Changsha , Hunan 410114 , China ;National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment (Changsha ), Changsha , Hunan 410114 , China
LYU Songtao, College of Transportation Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China ;National Engineering Research Center of Highway Maintenance Technology , Changsha , Hunan 410114 , China ;National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment (Changsha ), Changsha , Hunan 410114 , China
JIANG Xiangyang, College of Transportation Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China ;National Engineering Research Center of Highway Maintenance Technology , Changsha , Hunan 410114 , China ;National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment (Changsha ), Changsha , Hunan 410114 , China
XUE Yanhua, College of Transportation Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China ;National Engineering Research Center of Highway Maintenance Technology , Changsha , Hunan 410114 , China ;National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment (Changsha ), Changsha , Hunan 410114 , China
YU Yang, College of Transportation Engineering , Changsha University of Science & Technology , Changsha , Hunan 410114 , China ;National Engineering Research Center of Highway Maintenance Technology , Changsha , Hunan 410114 , China ;National Key Laboratory of Green and Long-Life Road Engineering in Extreme Environment (Changsha ), Changsha , Hunan 410114 , China

Abstract

In environments with large temperature variations and low humidity,the curing conditions of cement-stabilized macadam fail to meet the specifications,leading to slow early strength development and increased susceptibility to cracking.This study aimed to investigate the effects of actual environmental temperature,humidity,curing age,and addition of early strength agents on the cracking characteristics of cement-stabilized macadam.Variable temperature conditions were determined based on actual environmental temperature data.Four curing conditions were set by combining temperatures (variable temperature and standard temperature ) with relative humidity of 95%,80%,and 65%,respectively.Three types of specimens were prepared with 0%,10%,and 15% early strength agent contents and cured for 14 and 28 days,respectively.The cracking characteristics of the specimens were evaluated through splitting tensile strength tests,four-point bending flexural strength tests,four-point bending flexural modulus tests,and semi-circular bending tests.The results show that under variable temperature conditions,the cracking characteristics of cement-stabilized macadam,including strength,rigidity,and toughness,are lower than those under standard temperature conditions.Among them,the decrease in splitting fracture work is the most significant at 31.74%,while the reduction in flexural modulus is the smallest at 8.60%.Lower curing humidity indicates an increased susceptibility of cement-stabilized macadam to cracking.The incorporation of early strength agents can mitigate the negative effects of curing conditions.Scanning electron microscope (SEM ) observations reveal that variable temperature or lower humidity reduces the degree of cement hydration,while the addition of early strength agents enhances it.Based on correlation and reliability analysis,the four-point bending test is recommended for assessing the cracking characteristics of cement-stabilized macadam.

Publication Date

2-22-2025

DOI

10.14048/j.issn.1671-2579.2025.01.004

First Page

31

Last Page

41

Submission Date

March 2025

Recommended Citation

Dongdong, GE; Dingyuan, LIU; Songtao, LYU; Xiangyang, JIANG; Yanhua, XUE; and Yang, YU (2025) "Cracking Characteristics of Cement-Stabilized Macadam with Early Strength Agent under Variable Temperature and Humidity Curing Conditions," Journal of China & Foreign Highway: Vol. 45: Iss. 1, Article 4.
DOI: 10.14048/j.issn.1671-2579.2025.01.004
Available at: https://zwgl1980.csust.edu.cn/journal/vol45/iss1/4

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