Influence Of Adding Graphite Nano/Micro Platelets On Mechanical And Durability Properties Of Self Compacting Concrete (SSC)

Techs: MICROSOFT (EXCEL,WORD, POWERPOINT) ,ORIGIN 2018
Department: Civil Engineering
Team Lead: Muhammad Harris Naeem - (malikharris001@gmail.com)
Team Members: Abdul Ahad, Mehran Zulfiqar, Salman Khan
MSTeamURL: click here

Problem Statement

This project will be helpful to researchers working on nano/micro graphite.

Description

In this project Nano-graphite platelets are added in Self compacting concrete (SCC) at different percentages i.e. 0.1-0.5 % by mass of binder to check its effects on mechanical and durability properties. Different proportion of Nano-graphite platelets are added in SCC to check its effects on SCC. Fresh properties test (Slump flow test, L box test, V funnel test, U box test), Mechanical tests (Compressive, Tensile, Flexural test) and durability tests (Rapid chloride penetration test, absorption, sorptivity and acid attack test) are performed.

Detail

One of the most versatile and commonly used building materials on earth is reinforced concrete. The reinforcement in concrete structures is becoming denser and more clustered because of ambitious structural design ideas. The concrete must be able to pass the dense rebar arrangement without blocking or segregating. Design of such type of concrete is very challenging. Poor placement and lack of appropriate vibratory compaction can result in the presence of voids and results in loss of long-term durability of concrete structures. Engineers have been concerned about this for a long time.

 Self-compacting concrete (SCC) is the concrete that is compacted under its own weight, filling the areas of congested reinforcement and reducing the use of mechanical vibration. Self-compacting concrete provides many advantages over conventional concrete 1. It provides thinner cross section with better surface finish reducing the cost of labor 2. Rapid rate of its placement and reducing the cost of labor 3. reducing the noise in construction and can be placed in strictly noise monitored areas 4. Placement is easier 5. Flexibility in design. GNPs are tiny sacks consisting of graphene layers having thickness of commonly between 0.34 and 100 Nano-meters. Graphene comprises of hexagonal plane made up of single carbon–carbon layer and is usually named as a ‘‘sub structure unit”. Research Showed that with 1.5% wt. of GNPs, the flexure strength and flexural modulus increased by 27% and 68%, respectively, as compared to the controlled mix owing to adequate dispersion of GNPs. 

Summary

An experimental program was established to study the effect of Nano/micro graphite platelets (GNMPs) on properties of self-compacting concrete (SCC). The mixes were prepared with six percentages of (GNMPs) (0.1,0.2,0.25,0.3,0.4,0.5) by mass of binder. Properties investigated were fresh properties Slump flow test, L box test, V funnel test, U box test), Mechanical tests (Compressive, Tensile, Flexural test) and durability tests (Rapid chloride penetration test, absorption, sorptivity and acid attack test). Test for compressive strength and tensile strength were performed at 7 and 28 days of curing while the rest of tests were performed after 28 days of curing. Test result indicate that the mechanical strength of concrete increase with till 0.3 percent by mass of binder but decreases afterword. Flexural strength of SCC also improved with the addition of GNMPs. Durability properties also enhanced with the addition of GNMPs.

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