Study on the Method of Water-Air Two-Phase Spray Cooling of the Mass Concrete Construction Pavement Surface

DOI

10.2991/978-94-6463-932-2_28How to use a DOI?

Keywords

Mass concrete; temperature control; water-air two-phase flow; spraying cooling

Abstract

Temperature control and crack prevention are important tasks for the mass concrete construction. The temperature control construction measures are involved in the whole process of concrete construction, including concrete mixing, placement surface, watering and heat preservation. As for the concrete placement surface, the ambient temperature and solar radiation are mainly controlled through spraying of the placement surface, thus to effectively restrain the temperature rise of the concrete in the period from the placement of concrete to the pouring of concrete. The conventional spraying is generally realized with the air gun type spraying machine or the artificial roughening gun, and there are some unfavorable factors such as large atomized particles, small coverage area and insignificant shielding of solar radiation. Based on this, this paper presents a method of water-air two-phase flow spray cooling of the mass concrete placement surface, and develops a complete set of water-air two-phase flow spraying equipment, software system and analysis model. This has realized the effective control of the which realizes the effective control of the microenvironment of the placement surface. The actual application demonstrates that: (1) The equipment under this method can be used together with the formwork, and it can be installed easily, without influencing the construction. (2) The maximum atomized particle size shall not exceed 30μm. Maintain equilibrium between spray volume of water droplets and evaporation rate to ensure no water accumulation on the storage/working surface, without affecting the concrete mix ratio (as accumulated water would alter the water-cement ratio). (3) The placement surface can be fully covered to achieve good effects in shielding of the solar radiation and lowering of temperature; more specifically, the average pouring temperature can be reduced by about 2℃ compared with the conventional spraying method.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Songhui Li
AU  - Xiangyu Luo
AU  - Tong Zhang
AU  - Ruixue Zhang
PY  - 2025
DA  - 2025/12/22
TI  - Study on the Method of Water-Air Two-Phase Spray Cooling of the Mass Concrete Construction Pavement Surface
BT  - Proceedings of the 2025 2nd International Conference on Civil Engineering Structures and Concrete Materials (CESCM 2025)
PB  - Atlantis Press
SP  - 273
EP  - 290
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-932-2_28
DO  - 10.2991/978-94-6463-932-2_28
ID  - Li2025
ER  -