use of Reinforced fly ash sub bases in rural roads or the low volume roads. It can significantly reduce the cost of construction. The use of fly ash can pavement can reduce the ecological and environmental impact of such waste products.

1. PRESENTED BY:
SOURABH JAIN

2.  Fly ash is a waste by-product from thermal power plants,
which use coal as fuel.
 At present about 100 thermal power plants in India produce
about 130 million tonnes of fly ash every year.
 The construction of roads using fly ash helps to consume
bulk quantities of fly ash solving its disposal problems to
certain extent but also satisfies the construction
requirements.

3.  To observe the effect of reinforcement on
conventional parameters (engineering
properties) of fly ash.
 To study the effect of reinforcement on rut
depth formation on model section with
simulation of field conditions.

4.  Fly Ash
From N.T.P.C. Ghaziabad (UP).
As per Bureau of Indian Standard (BIS) it is also classified as
silt of low compressibility. (ML)
 Soil
Roorkee soil is used in present study.The soil used can be
classified as poor graded fine sand (SP).
 Reinforcement.
Fiber used in the present investigation is polypropylene fiber
manufactured from high-density polypropylene and polyethylene.

6.  Proctor Compaction Test Results
 California Bearing Ratio Test results
 Plate Load Test Results
 Dynamic load test in model test tank

7. Modified compaction tests.

8. Analysis of test results showed that both
optimum moisture content and maximum
dry density for all the types of soils,
decreased with an increase in fiber content.

10. California Bearing Ratio (CBR) of fly ash
increased with increase in percentage of fiber
content at a particular aspect ratio.

13. modulus of subgrade reaction (k) increases by introducing
the fiber with fly ash.
The k-value at 0.2 % fiber content increases 15.47 %, 21.4
% and 51.2% for fly ash, fly ash + 15 % soil and fly ash +25
% soil respectively.

14.  Steel tank (60x60x60cm) for repeated loading
tests.
 Four layers of pavement:
 Subgrade layer (200 mm)
 Sub base layer (210 mm)
 Base layer of WMM (150mm)
 Surface layer (25mm)

15.  10 cm plate used to transfer load from plunger
to the pavement surface.
 The numbers of load cycles applied on the model
are limited to 10,000 only.
 Volume of traffic is considered medium. (4100
kg wheel load)
 This whole stimulation is used to calculate rut
depth of pavement.
 Rut depth is indicator of life of a pavement.

17.  Both optimum moisture content and maximum dry
density for all the types of soils, decreased with an
increase in fiber content.
 California Bearing Ratio (CBR) of fly ash increased
with increase in percentage of fiber content at a
particular aspect ratio.
 Modulus of subgrade reaction increases with
increase in fiber content at constant fly ash
content.
 The rut depth of pavement decreases with increase
in fiber content hence life of pavement increases.

18.  “Reinforced flyash in rural road sub-bases.”
published in indian road congress (IRC)
journal.
 Rural Roads Manual (IRC-SP:20-2002), Indian
Roads Congress, New Delhi.
 Textbook “soil mechanics and foundation
engineering” by B.C. Punmia.
 Textbook “Highway materials and pavement
testing” by Khanna and Justo