This document discusses using rice husk ash to make bricks more cost effective. It outlines how rice husk ash is added to bricks to reduce materials costs without compromising strength or durability. Experiments were conducted to determine the optimal rice husk ash content, which was found to be 2% by weight. Bricks with 2% rice husk ash exhibited the highest compressive strength of 6.20 MPa and water absorption of 15.2%. The document concludes rice husk ash can be used to create stronger, more cost effective bricks.

2.  Rice husk ash is added to the brick to make it more
economical.

3.  The brick is the main material in construction due to
strengthen, durability, loading, compactness and light
weight.
 But now a days the materials cost of these bricks is
getting hired.
 By using rice husk ash as a building materials we can
reduce the cost of construction.

4.  To make a cost effective brick using waste materials
without compromising its properties.

5.  selection of raw materials
 manufacturing of fired brick with RHA in industrial
scale
 conducting experiments in the laboratory to test its
properties .

6.  Clay
• The clay was collected from a pit about 1m deep near the
bank of the river
• The pit was dug and excavated with the aid of an excavator.
 Rice Husk Ash:
• The rice husk ash was
collected from the output of the brick
kiln.

8.  Silicon dioxide : it gives more strength to the brick.
 Aluminum dioxide and iron oxide : it gives red color to
the pigment .

9. Procuring of raw
materials
Molding Drying
Sintering
Mixing
Curing
Addition of rice
husk ash

10.  The compressive strength of brick specimen having 2%
rice husk ash has maximum of compress strength of
6.20 MPa.
 The addition of rice husk ash are 2% by weight show
maximum of water absorption were 15.20 % because at
composition their high maximum of density properties.

11.  The bulk density were high maximum 1.68 g/cm3
with 2% addition of rice husk ash, and decrease when
rice husk ash addition more than 2%.

12.  Saves construction cost since the raw material are
easily available.
 Less water seepage and dampness in wall
 Less energy consumption
 Reduction in air pollution

13.  The best composition of brick is 2 percent of rice husk
ash by weight.
 The 2 percent of rice husk ash by weight obtain 6.20
MPa of compressive strength and 15.2 percent of water
absorption.

14.  The main component of rice husk ash is Silicon
Dioxide which effect of increasing interaction. The
interaction is that heated ash in quartz form rises up due
to solid state sintering. This cause effects strength of
brick end of water absorption.

15. [1] 'Chemical and Physical Properties of fired-Clay Brick
at Different type of Rice Husk Ash'. Proceedings of
International Conference on Environment Science and
Engineering. Singapore, (2011).
[2] Lin D. and Weng C., 2011. 'Use of sewage sludge ash
as brick material'. Journal of Environmental
Engineering.

16. [3] Nilantha B, G., Jiffry I., Kumara Y. and Subashi
G.H.M.J.., 2010. 'Structural and Thermal
Performances of Rice Husk Ash (RHA) Based Sand
Cement Block'. Proceeding of the International
Conference on Sustainable Built Environments.

17. [4] Ghassan A. and Mahmud H 'Study on Properties of
Rice Husk Ash and Its Use as Cement Replacement
Material'. (2016)
De Silva S. and Uduweriya R. Investigation of the
Properties of Concrete containing Rice Husk Ash.
Transactions of the Institution of Engineers, Sri Lanka
(IESL)(2011).