Title:
Development of Ultra-Low Temperature Anti-Freezing Pumping Admixture
Author(s):
Fei Xiao, Yongwei Wang, Jinhuan Lv, Jie Zhang, and Tongwei Lu
Publication:
Symposium Paper
Volume:
329
Issue:
Appears on pages(s):
279-290
Keywords:
ultralow temperature; antifreeze admixture; strength development; durability; microscopic technologies
DOI:
10.14359/51711221
Date:
9/26/2018
Abstract:
In many parts of the world, the lowest temperature in winter is less than -20 degrees Celsius. It is an important problem in the field of construction engineering to improve the quality of concrete engineering and improve the durability of the structure under extreme climate. This paper introduces the development of ultralow temperature anti freezing pumping admixture. In the experiment, the concrete cured at -4°F (-20 °C) or -13°F (-25°C) for 7 days. And then the specimens were maintained in standard condition for different ages. Mechanical and durability properties of concrete were test in different curing conditions and different ages were studied. Mechanical properties include “negative temperature” compressive and flexural strength. Durability includes anti-permeability performance, dry shrinkage and chloride ion penetration resistance. The experimental data shows that the concrete have good mechanical and durability properties in ultra-low temperature because of the addition of an anti-freezing pumping agent. Compared with ordinary antifreeze, the negative temperature strength of concrete mixed with this ultralow temperature anti freezing pumping agent can be increased by more than 100%. By means of scanning electron microscopy (SEM) and pore size analysis were carried out. The action of this super low temperature anti freezing pumping agent and the frost resistance mechanism of concrete are analyzed.
Related References:
Si-wei Cao, Zheng-zhong Wang and Lan luo, “Research and application of high frost-resistance concrete”, Journal of Northwest A & F University (Nat. Sci. Ed.), China, V. 36,No. 3, 2008, pp.223-227.
Ewerson C., “The influence of curing conditions on the permeability and durability of concrete, result from a field exposure test”, Cement and Concrete Reswarch, No. 23 1993, pp.683-684.
Ru Gao and Chunlei Wu, “Theory and application of the frost resistance of concrete”, Inner Mongolia Water Resources, China, No. 6, 2008, pp. 93-97.
Hale, M., 2009, “W, Seamus. F. Freyne and Bruce. W. Russell., “Examining the Frost Resistance High Performance Concrete,” Construction & Building Materials, V. 23, No. 2, pp. 878-888. doi: 10.1016/j.conbuildmat.2008.04.006
Lydon, F. D., 1990, “Effect of coarse aggregate on relative permeability of concrete,” Construction & Building Materials, No. 8, pp. 5-15.
Powers, T. C., and Helmuth, R. A., “Theory of Volume Change in Hardened Portland Cement Pastes During Freezing”, Proceeding of the highway Research Board, No. 32, 1953, pp. 258-297.
Tamon Ueda, Muttaqin Hasan, and Kohei Nagai, “Mesoscale Simulation of Influence of Frost Damage on Mechanical Properties of Concrete”, Journal of Materials in Civil Engineering, No. 6, 2009, pp. 244 -13°F (-25 °C)2