The significance of nanoparticles on bond strength of polymer concrete to steel

Abstract

Polymer concrete (PC) is a commonly used material in construction due to its improved durability and good bond strength to steel substrate. PC has been suggested as a repair and seal material to restore the bond between the cement annulus and the steel casing in wells that penetrate formations under consideration for CO 2 sequestration. Nanoparticles including Multi-Walled Carbon Nano Tubes (MWCNTs), Aluminum Nanoparticles (ANPs) and Silica Nano particles (SNPs) were added to an epoxy-based PC to examine how the nanoparticles affect the bond strength of PC to a steel substrate. Slant shear tests were used to determine the bond strength of PC incorporating nanomaterials to steel; resultsreveal that PC incorporating nanomaterials has an improved bond strength to steel substrate compared with neat PC. In particular, ANPs improve the bond strength by 51% over neat PC. Local shear stresses, extracted from Finite Element (FE)analysis of the slant shear test, were foundto be as much as twice the apparent/averageshear/bond strength. These results suggest that the impact of nanomaterials is higher than that shown by the apparent strength. Fourier Transform Infrared (FTIR) measurements of epoxy with and without nanomaterials showed ANPs to influence curing of epoxy, which might explain the improved bond strength of PC incorporating ANPs.

Nanoparticles used as an ingredient in different types of concrete

“…The effects of nano-silica decreased at the ages of 28 and 90 days; for example, the compressive strength of concrete produced with 3% replacement of nano-silica with cement decreased from 42% at the early age to 6% at 28 and 90 days. Douba et al [52] reported that the incorporation of different types of nanomaterials gave different elastic modulus values. They used different types of nanomaterials, such as multi-walled carbon nanotubes (MWCNTs), aluminum nanoparticles (ANP), and NS.…”

Poli̇mer Betonlarin Mekani̇k Performanslarinin Veri̇ Madenci̇li̇ği̇ Kullanarak Beli̇rlenmesi̇

“…Yani polimer beton, faz malzeme ile polimerin belli oranlarda karıştırılıp, daha sonra katalizör ve hızlandırıcı ilavesini takiben oda sıcaklığında polimerizasyon işleminin gerçekleşmesi sonucu, sertleşmesi ile elde edilen kompozit bir yapı malzemesidir [6,7]. Polimer betonlar geleneksel betona kıyasla yüksek mekanik dayanımları, geliştirilmiş durabilite özellikleri, esneklik, hafiflik, çevresel koşullara ve agresif kimyasallara direnç, geçirimsizlik kabiliyetleri ve üstün sağlamlık derecesi ile çelik ve beton yüzeyler için inşaat ve onarım çalışmalarında yaygın olarak kullanılan bir yapı malzemesidir [8][9][10].…”

Experimental Study on the Bond Performance between Fiber‐Reinforced Polymer Bar and Unsaturated Polyester Resin Concrete

“…A continuous curve model was proposed by Gao et al [19], which was capable of fitting the falling section of the bond stress-slippage curve for FRP barreinforced concrete; however, a horizontal line was employed to represent the bond residual section of the bond stress-slippage curve, which was inconsistent with the fact. e bond performance of FRP bar-reinforced special concrete has also received great attention recently [20][21][22][23][24][25][26][27][28][29]. Yang et al [20] studied the bond behavior between basalt fiber-reinforced polymer (BFRP) bar and coral concrete with a series of pull-out tests.…”

“…Nemeth et al [28] reported that the bond strength between smooth steel bar and polymer concrete was as much as 10 times higher than that between steel bar and ordinary concrete. Douba et al [29] found that the bond strength between steel bar and polymer concrete could be significantly improved by adding aluminum nanoparticles in polymer concrete.…”