Durability Behavior of Nano-Silica and OMMT Nano-Clay In High Performance Concrete

Abstract

In this work here the nanomaterials are colloidal and one is in aqueous state and other one is powdered form, so the materials are in liquid form so the usage of water for the mix is also decreases and the as the mix design is done for M60 so the water use is also limited or designed and the additional use is restricted for the water. Here in this work study as a durability behaviour study in high performance concrete the 30% GGBS is used here as the admixture and the cement content is also reduced and the superplasticizer of epoxy based is used for the sitting of the concrete and the strength increasing liquid are used. This work carried out for the testing of the specimens with days of curing of 7, 14 & 28 days for the mechanical properties here flexure testing is not done due to usage of highly expensive nanomaterials in actions. In this testing determines the dosage of the nano silica. Firstly 2, 4 & 6% nano silica are added in respectively mixed in concrete and casted and cured and tested and the result shows the 2% as the optimum dosage in the mechanical properties as well as the durability properties. Secondly keeping 2% nano silica as the constant and the OMMT nano clay 2, 4 & 6% are added and mixed and casted and cured and mechanical properties are determined and as well as durability is determined as the objective of the work is defined and scope of the work also states the experimental analysis of the work with microstructure analysis like SEM and EDX are done with samples to determine the additional compositions in the concrete and the conclusions is also done with concluding the project work.

Introduction

I. INTRODUCTION

Concrete is the second most used material after consumption of water. Continuous use of concrete constituents leads to scarcity of natural materials. To avoid this problem many researchers came with alternative solutions like adding admixtures, fibres, waste materials etc. nano-silica has potential for use in concrete and its application. Combination of slag and silica helps to gain more strength in less interval of time. Addition of 2% of nano-silica gives better strength properties [1]. The reduction in the size of the silica inclusions at an early age often boosted the strength of the slag mortars [2]. The test was conducted by [3] and observed that, the compressive and flexural strengths of both NS and NC were increased when compared to traditional mortar. The structural behaviour was studied by [4] and concluded that interaction of nanomaterials with calcium hydroxide Ca (OF) 2 crystals, which are arranged in the interfacial zone (ITZ) between cured cement paste and aggregates, is responsible for this enhancement this result in the formation of C- S-H gel and the filling effectof nanoparticles, which intensify microstructure. The durability properties were studied by [5] and noticed that adding nanoparticles to cementitious materials would increase their durability by changing the physicochemical characteristics of the binder.

The corrosion analysis were conducted and test findings were used to evaluate which nanomaterial concrete had the best mechanical characteristics and durability [6]. It has been discovered that nano silica, which ispozzolanic in nature and has a nice microstructure, would make an excellent substitute for cement [7]. And The results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) have also been utilised to determine the particle distribution in the concrete specimen. The complete experiment demonstrates that using the right number of nano-composite components improves concrete specimen performance [8]. From various literatures it has been noticed that, the Nano materials based concrete structure fill all micro holes because it’s thousand times smaller than in the case of conventional concrete materials.

The use of Nano materials helps in modifying properties and thus results into a more durable concrete. Increasing the content of binder improves the performance of the concrete mixture. Strengths and characterization there are optimal contents of NS & NC mass replacement of HPC matrix to obtain dense microstructure and highest mechanical strengths respectively. Strength of cement concrete increases proportionally with increasing the amount of Nano materials.

From above considerations an attempt is made to study the mechanical properties of nano-silica and nano-clay in HPC along with durability and microstructural properties.

Conclusion

1) In the testing the S1 & S2 gives the strength as the control mix the those two has to give the satisfactory results with increasing from curing period of strength with respectively. 2) The use of nanomaterials gives the strength more than the control mix in the use of addition of nano silica the 2% nano silica is has the more strength as compared to other two mixes. Here in the compressive test the 2% nano silica sample S3 is optimum. 3) This S3 and S7 are sample specimen of 2% Nano silica and the hybrid mix with 2% Nanosilica with 4% OMMT nanoclay. 4) The RCP test is one of the most durability test it shows the chloride attack on the sample specimen with charges of coulombs passed and this shows the passing remarks on the concrete conditions. 5) This images show the minute particle in the samples with CSH gel is also shown and the nanomaterials structure is also shown. In this images the 30% mix,GGBS is also shown and the determined for the presenting in the sample. 6) This EDX images shows not only the peaks but also with the elements presents in it with the detectors weather primary or secondary transmissions with magnifications of kiloelectrovolts (keV).

References

[1] Kinnaresh Patel (2012) “The Use of Nanoclay and Nanosilica as a Constructional Material” –IJERA Vol 2 – Issue 4 [2] Islam et.al (2012) “The use of NS and NMK with cement” – IJRET Vol 5- Issue 7 [3] M. L. Nehdi et.al (2013) “NS & NCl in HPC” – HBRC vol 11 2011601Anwar M Mohamed (2014) – “Influence of Nanomaterilas on flexural and strength of concrete” HBRC vol 10 1016 [4] Surendra P. Shah et.al (2015) – “Durability of Nano-Particles” SIPS Spinger 978 [5] Priya et.al (2021) “The effects of nanosilica and nanoclay in the with the properties of cement” JKA Journals vol 13.556541.11.254 [6] Jayaraman Ariyagounder (2021) “Investigation on the strength durability properties of concrete with nanomaterials” Springer vol 10.1007 [7] Sravanti et.al (2021) “The use of Nanomaterials in M60 concrete” SNR Journals vol 14.2564.253654.102 [8] Peng Zhang et.al (2021) “Effect of Nano Silica Particles on Impact Resistance and Durability of Concrete” MDPI 12, 1296

Copyright

Copyright © 2022 Sanjay N, Thanusha . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.