Abstract
For cement-based materials, the curing temperature determines the strength gain rate and the value of compressive strength. In this paper, the 5% cement-stabilized macadam mixture is used. Three indoor controlled temperature curing and one outdoor natural curing scenarios are designed and implemented to study the strength development scenario law of compressive strength, and they are standard temperature curing (20°C), constant low temperature curing (10°C), day interaction temperature curing (varying from 6°C to 16°C), and one outdoor natural temperature curing (in which the air temperature ranges from 4°C to 20°C). Finally, based on the maturity method, the maturity-strength estimation model is obtained by using and analyzing the data collected from the indoor tests. The model is proved with high accuracy based on the validated results obtained from the data of outdoor tests. This research provides technical support for the construction of cement-stabilized macadam in regions with low temperature, which is beneficial in the construction process and quality control.
Highlights
Cement-stabilized macadam is low-dose cement-base-stabilized mixture and its cement dosage is 5% or so; it is generally used for base layer of pavement construction in China [1]
Escalante-Garcia et al [14] tested the compressive strength of hydration at five temperatures ranging from 10°C to 60°C, and the results showed that high temperature can improve the initial compressive strength, but it can Journal of Advanced Transportation decrease the strength in the long term
This purpose of this study is to focus on the strength gain law of 5% cement-stabilized macadam mixture at low temperature, which meets the actual temperature of the construction project. e maturity theory will be employed to predict the compressive strength
Summary
Cement-stabilized macadam is low-dose cement-base-stabilized mixture and its cement dosage is 5% or so; it is generally used for base layer of pavement construction in China [1]. Since the strength cannot be confirmed, one cannot reasonably arrange the process [7] Based on this special temperature condition, there is a strong need to study the compressive strength gain laws under such different low temperature curing conditions. It is important to note that such curing failed to account for the alternate changes in the temperatures during actual days and nights (like the construction project), and there have been no tests conducted under outdoor natural conditions. As such, this purpose of this study is to focus on the strength gain law of 5% cement-stabilized macadam mixture at low temperature, which meets the actual temperature of the construction project. Appropriate function will be selected and relevant parameters will be calibrated and obtained by using and analyzing the experimental data. e research results will provide technical support for the construction of cement-stabilized macadam in regions of low temperature, which is beneficial to the construction quality and process control
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