@article{Wang_Shen_Wang_Gao_Zhang_2016, title={Nuclear magnetic resonance analysis of freeze-thaw damage in natural pumice concrete}, volume={66}, url={https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/1992}, DOI={10.3989/mc.2016.09014}, abstractNote={This paper presents an analysis of the damage propagation features of the pore structure of natural pumice lightweight aggregate concrete (LWC) under freeze-thaw cyclic action. After freeze-thaw cycling, we conducted nuclear magnetic resonance (NMR) tests on the concrete and acquired the porosity, distribution of transverse relaxation time <em>T<sub>2</sub></em>, and magnetic resonance imaging (MRI) results. The results showed the following. The <em>T<sub>2</sub></em> distribution of the LWC prior to freeze-thaw cycling presented four peaks representative of a preponderance of small pores. After 50, 100, 150, and 200 freeze-thaw cycles, the total area of the <em>T<sub>2</sub></em> spectrum and the porosity increased significantly. The MRI presented the changing spatial distribution of pores within the LWC during freeze-thaw cycling. Ultrasonic testing technology was applied simultaneously to analyze the NMR results, which verified that the new NMR technology demonstrated high accuracy and practicability for research regarding freeze-thaw concrete damage.}, number={322}, journal={Materiales de Construcción}, author={Wang, Xiaoxiao and Shen, Xiangdong and Wang, Hailong and Gao, Chu and Zhang, Tong}, year={2016}, month={Jun.}, pages={e087} }