Abstract
Waste stone powder (SP) from machine-made sand, which can be substituted for natural sands in concrete causes environmental problems. To investigate effects of polycarboxylate superplasticizers (PCEs) molecular structure on their behavior in cement-SP paste, grain composition, mineral compositions, and zeta potentials of two kinds of SPs were measured. Effects of PCEs on their dispersion and adsorption behavior in cement-SP paste were investigated. The results show that the intercalation of SPs with PCEs caused PCE adsorption in the interlayer of SPs and decreased cement-SPs paste fluidity. The intercalation of PCE with Ledong stone powder (LDSP) was higher than with Haikou stone powder (HKSP), because that the intercalation between PCE and muscovite, which is present in LDSP and isn’t present in HKSP is stronger than the other mineral composites. PCE-S1 has a short side chain which is difficult to be intercalated in SPs, caused higher cement-SP paste fluidity, and lower difference in adsorption amount between cement and SPs than the other PCEs. Thus, a short-side-chain-PCE has good SP tolerance.
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.
