Abstract
In this paper a styrene–acrylate copolymer (SAE) powder was used to modify Portland cement paste. The concentration of the products of hydration was investigated using X-ray diffraction (XRD). Also the physical and chemical interactions occurring in the modification process were studied using Fourier-transform infrared spectrometer (FTIR). The results show that the addition of SAE powder facilitates the formation of ettringite (AFt). The hydration product tetracalcium aluminate hydrate (C4AH13) begins to appear in the cement paste after 7days, its formation slightly decreases with an increase in the SAE powder–cement ratio (mp/mc). Single-sulfur hydrated calcium sulphoaluminate (AFm) is also found in the cement paste beginning after 7days; however its content is very small. Also as the mp/mc is increased the amount of calcium hydroxide (Ca(OH)2) in the hydrating cement paste decreases, this effect is more pronounced at earlier ages. FTIR analysis indicates that Ca2+–carboxyl complexes form during the hydration of cement paste containing SAE powder.
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.
