Abstract
Large amounts of rice husk ash (RHA) are produced every year worldwide, and difficulties related to its disposal may cause this product to become an environmental hazard. Owing to its high amorphous silica content, RHA has shown to be a valid supplementary cementing material in the production of concrete. This paper presents the physical and chemical properties of a new generation RHA that is off-white in color, is carbon neutral, and has no crystalline SiO2 and toxic metals. The effects on mechanical properties of a mixture using off-white rice hull ash (OWRHA) as partial replacement of white cement were also investigated. The OWRHA-blended concrete has higher compressive and splitting tensile strengths at various ages compared with the control mixture. It is shown that up to 15% of OWRHA could be advantageously blended with white cement to enhance white concrete performance without modifying the aesthetics of the final product.
| Original language | English |
|---|---|
| Article number | 013010QMT |
| Pages (from-to) | 1078-1083 |
| Number of pages | 6 |
| Journal | Journal of Materials in Civil Engineering |
| Volume | 22 |
| Issue number | 10 |
| DOIs | |
| State | Published - Mar 1 2010 |
Fingerprint
Keywords
- Ashes
- By-product
- Cement
- Mechanical properties
- Recycling
ASJC Scopus subject areas
- Building and Construction
- Civil and Structural Engineering
- Materials Science(all)
- Mechanics of Materials
Cite this
Carbon neutral off-white rice husk ash as a partial white cement replacement. / Ferraro, Rossella M.; Nanni, Antonio; Vempati, Rajan K.; Matta, Fabio.
In: Journal of Materials in Civil Engineering, Vol. 22, No. 10, 013010QMT, 01.03.2010, p. 1078-1083.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Carbon neutral off-white rice husk ash as a partial white cement replacement
AU - Ferraro, Rossella M.
AU - Nanni, Antonio
AU - Vempati, Rajan K.
AU - Matta, Fabio
PY - 2010/3/1
Y1 - 2010/3/1
N2 - Large amounts of rice husk ash (RHA) are produced every year worldwide, and difficulties related to its disposal may cause this product to become an environmental hazard. Owing to its high amorphous silica content, RHA has shown to be a valid supplementary cementing material in the production of concrete. This paper presents the physical and chemical properties of a new generation RHA that is off-white in color, is carbon neutral, and has no crystalline SiO2 and toxic metals. The effects on mechanical properties of a mixture using off-white rice hull ash (OWRHA) as partial replacement of white cement were also investigated. The OWRHA-blended concrete has higher compressive and splitting tensile strengths at various ages compared with the control mixture. It is shown that up to 15% of OWRHA could be advantageously blended with white cement to enhance white concrete performance without modifying the aesthetics of the final product.
AB - Large amounts of rice husk ash (RHA) are produced every year worldwide, and difficulties related to its disposal may cause this product to become an environmental hazard. Owing to its high amorphous silica content, RHA has shown to be a valid supplementary cementing material in the production of concrete. This paper presents the physical and chemical properties of a new generation RHA that is off-white in color, is carbon neutral, and has no crystalline SiO2 and toxic metals. The effects on mechanical properties of a mixture using off-white rice hull ash (OWRHA) as partial replacement of white cement were also investigated. The OWRHA-blended concrete has higher compressive and splitting tensile strengths at various ages compared with the control mixture. It is shown that up to 15% of OWRHA could be advantageously blended with white cement to enhance white concrete performance without modifying the aesthetics of the final product.
KW - Ashes
KW - By-product
KW - Cement
KW - Mechanical properties
KW - Recycling
UR - http://www.scopus.com/inward/record.url?scp=77957118922&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77957118922&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)MT.1943-5533.0000112
DO - 10.1061/(ASCE)MT.1943-5533.0000112
M3 - Article
AN - SCOPUS:77957118922
VL - 22
SP - 1078
EP - 1083
JO - Journal of Materials in Civil Engineering
JF - Journal of Materials in Civil Engineering
SN - 0899-1561
IS - 10
M1 - 013010QMT
ER -