Improvement of the properties of plasma‐modified ground tire rubber‐filled cement paste

Abstract

The thesis investigated that the adhesion of ground tire rubber (GTR) to cement can be improved by applying surface plasma modification. The hydrophobic surface of GTR powder has been transformed to a hydrophilic one through plasma treatment. Attenuated total reflectance Fourier transform infrared spectral studies showed the increase in peak intensity at the range of 1400-1600 cm À1 , indicating the generation of carbon-carbon double bond after plasma treatment on the surface of the GTR powder. The X-ray photoelectron spectroscopic analysis further confirmed the presence of oxygen-containing polar functional groups on the surface of the GTR powder after atmospheric plasma treatment. The improve-ments in plastic deformation and elastic deformation that attributed to the enhanced interfacial interaction between modified GTR powder and cement matrix were observed for the modified GTR-filled cement paste via triaxial test. The pore size distribution testing manifested a better compactness of plasma GTR-filled cement paste. Besides, scanning electron microscope illustrated that adhesion of modified GTR powder with cement matrix increased.

Plasma treatment of polymer powders – from laboratory research to industrial application

“…Another important application area are composites. In this case, plasma‐treated polymer powders are used in fiber‐reinforced composites (e.g., carbon or sisal fibers) or as additives and tribological fillers with improved adhesion properties in high performance polymers or cement pastes . Another interesting application is the adhesion of sintered plasma‐modified PE powder on PUR foam products for the production of seats in the automotive industry or better isolated thermoboxes, i.e., for food industry…”

“…Several researchers investigated the combination of a cold remote MW plasma afterglow with FBRs . Figure (I–L) shows used setups.…”

Effect of dicumyl peroxide and phenolic resin as a mixed curing system on the mechanical properties and morphology of TPVs based on HDPE/ground tire rubber

“…Moreover, there are some physical methods and chemical approaches used to modify the GTR. Some chemical methods such as the surface modification, oxidation or chlorination of GTR particles' surface are necessary in order to obtain a good adhesion with the polymer matrix and GTR powders and then improve mechanical properties of the blends according to literatures . Another possible method for compatibilization is the surface treatment of GTR particles using various physical methods such as like UV, electron‐beam, gamma ray etc.…”

Thermoplastic Rubber (TPR) Modified by a Silane Coupling Agent and Its Influence on the Mechanical Properties of Oil Well Cement Pastes

“…Li and Guo [4] showed that the filling effect of rubber particles effectively increases the elastic deformation ability of oil well cement stone through research on the effect of rubber powder in oil well cement. Cheng et al [5,6] and Long et al [7] modified rubber powder using low-temperature plasma technology and added modified rubber powder to the oil well cement. e elastic modulus of cement stone containing rubber particles is lower than that of pure cement, which can improve the plasticity and elastic deformation capacity of cement stone and make the structure of cement paste more compact.…”