TY - GEN
T1 - The relationship between vickers microhardness and compressive strength of functional surface geopolymers
AU - Subaer,
AU - Ekaputri, Januari Jaya
AU - Fansuri, Hamzah
AU - Abdullah, Mustafa Al Bakri
N1 - Publisher Copyright:
© 2017 Author(s).
PY - 2017/9/26
Y1 - 2017/9/26
N2 - An experimental study to investigate the relationship between Vickers microhardness and compressive strength of geopolymers made from metakaolin has been conducted. Samples were prepared by using metakaolin activated with a sodium silicate solution at a different ratio of Si to Al and Na to Al and cured at 70oC for one hour. The resulting geopolymers were stored in an open air for 28 days before conducting any measurement. Bulk density and apparent porosity of the samples were measured by using Archimedes's method. Vickers microhardness measurements were performed on a polished surface of geopolymers with a load ranging from 0.3 - 1.0 kg. The topographic of indented samples were examined by using scanning electron microscopy (SEM). Compressive strength of the resulting geopolymers was measured on the cylindrical samples with a ratio of height to the diameter was 2:1. The results showed that the molar ratios of geopolymers compositions play important roles in the magnitude of bulk density, porosity, Vickers's microhardness as well as the compressive strength. The porosity reduced exponentially the magnitude of the strength of geopolymers. It was found that the relationship between Vickers microhardness and compressive strength was linear.
AB - An experimental study to investigate the relationship between Vickers microhardness and compressive strength of geopolymers made from metakaolin has been conducted. Samples were prepared by using metakaolin activated with a sodium silicate solution at a different ratio of Si to Al and Na to Al and cured at 70oC for one hour. The resulting geopolymers were stored in an open air for 28 days before conducting any measurement. Bulk density and apparent porosity of the samples were measured by using Archimedes's method. Vickers microhardness measurements were performed on a polished surface of geopolymers with a load ranging from 0.3 - 1.0 kg. The topographic of indented samples were examined by using scanning electron microscopy (SEM). Compressive strength of the resulting geopolymers was measured on the cylindrical samples with a ratio of height to the diameter was 2:1. The results showed that the molar ratios of geopolymers compositions play important roles in the magnitude of bulk density, porosity, Vickers's microhardness as well as the compressive strength. The porosity reduced exponentially the magnitude of the strength of geopolymers. It was found that the relationship between Vickers microhardness and compressive strength was linear.
UR - http://www.scopus.com/inward/record.url?scp=85030666211&partnerID=8YFLogxK
U2 - 10.1063/1.5002382
DO - 10.1063/1.5002382
M3 - Conference contribution
AN - SCOPUS:85030666211
T3 - AIP Conference Proceedings
BT - 3rd Electronic and Green Materials International Conference 2017, EGM 2017
A2 - Ghazli, Mohd Fathullah
A2 - Ismail, Rizalafande Che
A2 - Abdullah, Mohd. Mustafa Albakri
A2 - Ramli, Muhammad Mahyiddin
A2 - Rahim, Shayfull Zamree Abd
A2 - Isa, Siti Salwa Mat
A2 - Saad, Mohd Nasir Mat
PB - American Institute of Physics Inc.
T2 - 3rd Electronic and Green Materials International Conference 2017, EGM 2017
Y2 - 29 April 2017 through 30 April 2017
ER -