Nano-structural changes of cement paste due to neutron and gamma irradiation are investigated by using small-angle neutron scattering (SANS). Disk specimens were prepared with the w/c ratios of 0.4 and 0.5, and they were exposed to the neutron fluence of 2.57 × 1014 n/cm2 and the gamma radiation does dosage of 38.4 Gy. Based on SANS data and a microstructural model of C-S-H gel, one observed that the size of C-S-H globules increased after irradiation. The change of C-S-H globule size may be associated with the change of surface morphology and chemical bonding of C-S-H, and thus further research on the irradiation effects on cement paste is necessary.
Bibliographical noteFunding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning ( 2013M2B2A4041330 , 2017K1A3A1A67015884 ). The information presented in this paper is the sole opinion of the authors and does not necessarily reflect the views of the sponsoring agency.
All Science Journal Classification (ASJC) codes
- Building and Construction
- Materials Science(all)