The Possibility of Adding the Rice Husk Ash (RHA) to the Concrete

Title: The Possibility of Adding the Rice Husk Ash (RHA) to the Concrete
Author(s): Tashima
Paper category : conference
Book title: International RILEM Conference on the Use of Recycled Materials in Building and Structures
Editor(s): E. Vázquez, Ch. F. Hendriks and G.M.T. Janssen
Print-ISBN: 2-912143-52-7
e-ISBN: 2912143756
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 778 - 786
Total Pages: 9
Nb references: 4
Language: English

Abstract: In the last decades, the use of residue in civil construction, specially in addition to
concrete, has been subject of many researches due to, besides to reduce the environmental
polluters factors, it may lead several improvements of the concrete properties. The world rice
harvest is estimated in 500 million tons per year, and Brazil is the 8th producer. Considering
that 20% of the grain is husk, and 20% of the husk after combustion is converted into ash, a
total of 20 million tons of ash can be obtained.
This paper evaluates how different contents of rice husk ash (RHA) added to concrete may
influence its physical and mechanical properties. Samples with dimensions of 10 X 20 cm
were tested, with 5% e 10% of RHA, replacing in mass the cement. Properties like simple
compressive strength, splitting tensile strength, water absorption and modulus of elasticity
were evaluated.
The results were compared to control sample and the viability of adding RHA to concrete
was verified.

Online publication: 2004-09-29
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143756.086