Experimental study on ASR performance of concrete with nano-particles

Abstract

Alkali-silica reaction (ASR) is a serious durability problem, resulting in significant maintenance and reconstruction cost of concrete infrastructure all over the world, so more and more attention has been attracted to it. This paper tends to discuss whether nano-SiO 2 and nano-Fe 2 O 3 can mitigate the concrete deterioration caused by ASR. The test results show that the concretes with nano-particles have lower expansion and higher sonic velocity. Therefore, it is an available method for concrete to mix with nano-particles to mitigate ASR and the optimum content of nano-SiO 2 and nano-Fe 2 O 3 in concrete is 2.0% and 1.0%, respectively. The mitigating mechanism is revealed through the effect of mixing water on the porosity.

Durability of concrete with nano-particles under combined action of carbonation and alkali silica reaction

“…The mechanism of ASR has been discussed in another paper (Zhang, Zhang, and Xie 2019), from that paper, we can conclude that enough OH − , Ca 2+ and water is essential for the process of ASR.…”

“…So, the concretes with nano-particles become more compact, which can limit the moisture transfer and the migration of Na + , K + and soluble Si caused by carbonization (Branch et al 2016;Liu et al 2015). The detailed common mechanism can be seen in other paper (Zhang, Zhang, and Xie 2019).…”

Expansion and Mitigation of Alkali-Silica Reaction in Binary Blended Concrete Confining Potentially Reactive Aggregates

“…Seeing as it affects the durability and aesthetic of concrete, numerous studies have emerged in an attempt to understand ASR [6][7][8][9] by creating models [10][11][12] and seeking mitigation techniques through either metakaolin-based internal conditioning (MIC) [13][14], microbially induced carbonate precipitation technology (MICP) [15], aggregate-focused studies [2], [5], [16][17], chemically-induced reaction studies [18][19][20], or simpler introductions of a supplementary cementitious material (SCM) like fly ash, ground granulated blast furnace slag (GGBFS), glass, etc. [4], [21][22][23][24][25][26][27][28].…”

Study on influencing factors of photocatalytic performance of CdS/TiO2nanocomposite concrete

“…He et al [36] replaced the traditional concrete in GFRP concrete composite columns with a new type of nanoconcrete and carried out a series of experimental studies on the mechanical properties of this new type of composite column. Cheng et al [37][38][39][40][41] added a certain amount of nano-siO 2 to concrete to improve the durability of concrete. Al-Swaidani [42] studied the efficiency of adding concrete binder to volcanic slag on a nanometer scale.…”