Abstract
This study develops a resin cement paste (RCP) with excellent elastic deformation and strength at high temperature and high pressure (HTHP) and determines the reinforcement-toughening mechanism of the resin in the cement paste using XRD, TG, Si29 MAS NMR, SEM, and nitrogen adsorption methods. The results showed that in the RCP, the resin mixture (RM) reduced the porosity of the RCP. The RM did not change the crystalline structure of hydration products in the paste, but some calcium ions diffused from the cement matrix into the RM. The calcium/silica ratio of the cement matrix decreased and layered hydration products were formed around the RM. Thus, in the RCP the content of hydration products containing layered gel pores (pore diameter of 3.8 nm) increased; compared with pure cement paste, the average chain length of the hydration products in the RCP increased from 3.09 to 3.46 when cured at 90 °C and 21 MPa for 28 d. Moreover, there was excellent cementation of the RM and cement matrix at HTHP. Compared with pure cement paste, the compressive strength and tensile strength of RCP containing 15 % RM increased by 14.61 % and 11 %, respectively, and the Young’s modulus decreased from 5.01 GPa to 4.56 GPa.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
