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| Effect and mechanism of coupling with frost and salt on concrete performance with CWCPM |
| 1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang′an University, Xi′an, Shaanxi 710064，China; 2. College of Materials Science and Engineering, Xi′an University of Architecture and Technology, Xi′an, Shaanxi 710064, China |
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Abstract To investigate the frost resistance performance of smallscale concrete under different CWCPM contents and watercement ratios and to investigate the freezethaw damage to the smallscale concrete under different salt solution concentrations, XRD and mercury intrusion porosimetry tests were carried out, and the improving mechanism of CWCPM to the frost resistance performance of smallscale concrete was analyzed. The results show that the concrete has the best frost resistance performance when the CWCPM dosage is 30%. The worst performance is obtained when the concentration of salt solution is 3.5%. The addition of CWCPM can reduce Ca(OH)2 content and improve the composition of concrete hydration products to refine the internal pore structure of concrete. The water permeability, the freezing rate, the internal hydrostatic pressure and the osmotic pressure are reduced to improve the antifreezing performance.
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Received: 18 May 2016
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2017, Vol. 38 
