Details
| Original language | English |
|---|---|
| Pages (from-to) | 199-212 |
| Number of pages | 14 |
| Journal | Journal of Asian Ceramic Societies |
| Volume | 7 |
| Issue number | 2 |
| Early online date | 22 Apr 2019 |
| Publication status | E-pub ahead of print - 22 Apr 2019 |
Abstract
This work focuses on an in-depth investigation of the formation of pores in the structure of lightweight geopolymer cements and mortars using rice husk as a foaming agent. The hardener used in this study was sodium waterglass. Metakaolin was replaced by 0, 10, 20, 30 and 40 % by mass of husk and the obtained powders were used to produce lightweight geopolymer cements and mortars. The formation of pores in the lightweight geopolymer cements was monitored using X-ray diffractometry and infrared spectroscopy while those in the mortars were assessed using apparent density and compressive strength measurements, mercury intrusion porosimetry and optical and scanning electron microscopy. The values for the compressive strength and apparent density were in the ranges of 28.92–0.75 MPa and 1.88–1.70 g/cm 3 , respectively. The results indicated that the values for the compressive strength and apparent density of geopolymer mortars decreased while those of the cumulative pore volume increased with increases in the metakaolin replacement level. Stereomicroscopic and scanning electron microscopic images showed the presence of rice husk and fibres of rice husk, respectively, in the networks. It was found that rice husk can be used as a foaming agent for producing sustainable lightweight geopolymer mortars.
Keywords
- compressive strength, hardener, lightweight geopolymers, metakaolin, Rice husk
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Journal of Asian Ceramic Societies, Vol. 7, No. 2, 22.04.2019, p. 199-212.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Microstructure and mechanical, physical and structural properties of sustainable lightweight metakaolin-based geopolymer cements and mortars employing rice husk
AU - Riyap, Hamed I.
AU - Bewa, Christelle N.
AU - Banenzoué, Charles
AU - Tchakouté, Hervé K.
AU - Rüscher, Claus H.
AU - Kamseu, Elie
AU - Bignozzi, Maria C.
AU - Leonelli, Cristina
N1 - Funding information: This work was supported by the Alexander von Humboldt-Stiftung [KAM/1155741 GFHERMES-P];
PY - 2019/4/22
Y1 - 2019/4/22
N2 - This work focuses on an in-depth investigation of the formation of pores in the structure of lightweight geopolymer cements and mortars using rice husk as a foaming agent. The hardener used in this study was sodium waterglass. Metakaolin was replaced by 0, 10, 20, 30 and 40 % by mass of husk and the obtained powders were used to produce lightweight geopolymer cements and mortars. The formation of pores in the lightweight geopolymer cements was monitored using X-ray diffractometry and infrared spectroscopy while those in the mortars were assessed using apparent density and compressive strength measurements, mercury intrusion porosimetry and optical and scanning electron microscopy. The values for the compressive strength and apparent density were in the ranges of 28.92–0.75 MPa and 1.88–1.70 g/cm 3 , respectively. The results indicated that the values for the compressive strength and apparent density of geopolymer mortars decreased while those of the cumulative pore volume increased with increases in the metakaolin replacement level. Stereomicroscopic and scanning electron microscopic images showed the presence of rice husk and fibres of rice husk, respectively, in the networks. It was found that rice husk can be used as a foaming agent for producing sustainable lightweight geopolymer mortars.
AB - This work focuses on an in-depth investigation of the formation of pores in the structure of lightweight geopolymer cements and mortars using rice husk as a foaming agent. The hardener used in this study was sodium waterglass. Metakaolin was replaced by 0, 10, 20, 30 and 40 % by mass of husk and the obtained powders were used to produce lightweight geopolymer cements and mortars. The formation of pores in the lightweight geopolymer cements was monitored using X-ray diffractometry and infrared spectroscopy while those in the mortars were assessed using apparent density and compressive strength measurements, mercury intrusion porosimetry and optical and scanning electron microscopy. The values for the compressive strength and apparent density were in the ranges of 28.92–0.75 MPa and 1.88–1.70 g/cm 3 , respectively. The results indicated that the values for the compressive strength and apparent density of geopolymer mortars decreased while those of the cumulative pore volume increased with increases in the metakaolin replacement level. Stereomicroscopic and scanning electron microscopic images showed the presence of rice husk and fibres of rice husk, respectively, in the networks. It was found that rice husk can be used as a foaming agent for producing sustainable lightweight geopolymer mortars.
KW - compressive strength
KW - hardener
KW - lightweight geopolymers
KW - metakaolin
KW - Rice husk
UR - http://www.scopus.com/inward/record.url?scp=85064689014&partnerID=8YFLogxK
U2 - 10.1080/21870764.2019.1606140
DO - 10.1080/21870764.2019.1606140
M3 - Article
AN - SCOPUS:85064689014
VL - 7
SP - 199
EP - 212
JO - Journal of Asian Ceramic Societies
JF - Journal of Asian Ceramic Societies
IS - 2
ER -