properties of mixes of sugar cane fibre waste with cement
TRANSCRIPT
Properties of mixes of sugar cane fibre waste with cement binding
Dr Rajesh JeetahT. Dusoruth, A.Seeboo & P. Khedun
Cambridge SS Conference 13 April 2005
Outline
Introduction & aim of workProperties of Sugar Cane Fibres(SCF)Literature ReviewExpt Work/ResultsConclusions and suggestions for future work
Introduction
Sugar IndustrySugar Cane fibresAlternative uses of SCF?* Textile* Geotextile, geotechnical material* Fibre reinforced composites* SCF & SS
Sugar Cane
Sugar cane field – pre-harvest
Mechanical properties of fibresTensile strength(N/mm2) Related ProblemsAsbestos 3600Glass 1000-3500 Alkali Resistance, BrittlenessSteel 2400-3800 -Carbon 2000-3000 Cement adhesionKevlar-29 2380-3100 PP 200-550PA-66 700-1000PET 800-1300Rayon 450-1100PAN 850Jute 187-540 Alkali Resistance Flax 250-1000Cotton 350
SCF 290 ?
Why consider Sugar cane fibres?
Annual Production of Crushed SCF Fibres
200 million tonnes
……………..Renewable.
Collier et al 1992
SCF
SCF
Survey of Cellulosic based material research
ReinforcementGeotextileSolidification/Stabilisation (S/S)
Aggarwal 1995
Ramirez-Coreti 1992
Summary
1. Flexural strength of concrete does increase with an increase in fibre content up to an optimal level
2. SCF at optimal level outperforms control samples over a period of 6 years
Solidification/stabilisation
Janusa et al 2002
Effect of fibre content on UCS of concrete
51015202530
0 2 4 6 8 10
% fiber
UC
S (N
/mm
2)
Mix design:-OPC:Sand:Gravel = 1:2.25:2.65 with water/cement ratio of 0.54
Impact Resistance
0
1
2
3
4
5
6
7
8
0 1 2 3 4 5 6% Bagasse
No.
of b
low
s
Water curing
Air curing
Conclusions1. Up to an optimal value SCF does
contribute towards an increase in strength of concrete
2. SCF may be used to produce Light weight concrete with improved impact resistance
3. SCF can be used in S/S of hazardous waste
Ongoing work
Studies on effect of cellulose on S/SEffect of delignified fibres on concrete strengthS/S effect on other hazardous wasteEffect of other textile waste on S/S
Thank you
Notes:
1. Cellulose is a polysaccharide with the following formula: (C6H10O5)n
2. Bagasse has a polymer chain of 2000-3000 units
3. Kraft process: Sodium sulphide and sodium hydroxide are active ingredients used to attack lignin
0
20
40
60
80
100
120
0 1 2 3 4 5 6
% Bagasse
Slump value, mm
Vebe time, s