Novel bifunctional dispersing agents from waste PET packaging materials and interaction with cement

•Novel modified polymer (MPET) dispersants were prepared from waste plastic bottles.•Particle size and surface area given nice degree of agreement with microstructure.•The MPETs improved the fluidity and retention time of fresh cement paste.•TOC and zeta potential highly supported MPETs-cement inter...

Full description

Saved in:
Bibliographic Details
Published in:Waste management (Elmsford) 2019-02, Vol.85, p.563-573
Main Authors: Meawad, Amr, Ibrahim, Saber
Format: Article
Language:English
Subjects:
Cement paste
Compressive Strength
Construction Materials
Dispersing agent
Flowability
PET bottles
Polyethylene Terephthalates
Recycling
Waste Products
Waste recycling
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Novel modified polymer (MPET) dispersants were prepared from waste plastic bottles.•Particle size and surface area given nice degree of agreement with microstructure.•The MPETs improved the fluidity and retention time of fresh cement paste.•TOC and zeta potential highly supported MPETs-cement interaction mechanism. Modified polyethylene terephthalate polymers (MPETs), as a novel dispersing agent, were successfully prepared from polyethylene terephthalate (PET (flakes of empty bottles in order to recycle waste from one particularly abundance packaging material. Different techniques were used to characterize the MPETs samples, including attenuated total reflectance Fourier transform infrared (ATR-FTIR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), scanning electron microscope (SEM), dynamic light scattering (DLS) and Brunauer–Emmett–Teller (BET) surface area. The fluidity and mini-slump retention of fresh cement paste were tested to evaluate the dispersion capability of the MPETs. The effect of MPETs on the setting time and compressive strength of the cement paste were studied. The adsorptive behavior of the MPETs dispersions was examined using total organic carbon (TOC) and zeta potential to interpret the interaction of the MPETs with cement. The results show that the MPETs can be adsorbed on the cement particles and improve the flowability, setting time and the compressive strength of cement paste. Adding value by generating a cheap and effective dispersing agent from recycling waste polymers is a great approach toward eco-friendly waste management.
ISSN:0956-053X
1879-2456
DOI:10.1016/j.wasman.2019.01.028