Use of OPC to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature
Most previous works on fly ash based geopolymer concrete focused on concretes subjected to heat curing. Development of geopolymer concrete that can set and harden at normal temperature will widen its application beyond precast concrete. This paper has focused on a study of fly ash based geopolymer c...
| Main Authors: | , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier BV
2015
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/38376 |
| _version_ | 1848755303954251776 |
|---|---|
| author | Nath, Pradip Sarker, Prabir |
| author_facet | Nath, Pradip Sarker, Prabir |
| author_sort | Nath, Pradip |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Most previous works on fly ash based geopolymer concrete focused on concretes subjected to heat curing. Development of geopolymer concrete that can set and harden at normal temperature will widen its application beyond precast concrete. This paper has focused on a study of fly ash based geopolymer concrete suitable for ambient curing condition. A small proportion of ordinary Portland cement (OPC) was added with low calcium fly ash to accelerate the curing of geopolymer concrete instead of using elevated heat. Samples were cured in room environment (about 23oC and RH 65±10%) until tested. Inclusion of OPC as little as 5% of total binder reduced the setting time to acceptable ranges and caused slight decrease of workability. The early-age compressive strength improved significantly with higher strength at the age of 28 days. Geopolymer microstructure showed considerable portion of calcium-rich aluminosilicate gel resulting from the addition of OPC. |
| first_indexed | 2025-11-14T08:54:10Z |
| format | Journal Article |
| id | curtin-20.500.11937-38376 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:54:10Z |
| publishDate | 2015 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-383762017-09-13T14:09:30Z Use of OPC to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature Nath, Pradip Sarker, Prabir setting time Portland cement workability compressive strength geopolymer concrete Most previous works on fly ash based geopolymer concrete focused on concretes subjected to heat curing. Development of geopolymer concrete that can set and harden at normal temperature will widen its application beyond precast concrete. This paper has focused on a study of fly ash based geopolymer concrete suitable for ambient curing condition. A small proportion of ordinary Portland cement (OPC) was added with low calcium fly ash to accelerate the curing of geopolymer concrete instead of using elevated heat. Samples were cured in room environment (about 23oC and RH 65±10%) until tested. Inclusion of OPC as little as 5% of total binder reduced the setting time to acceptable ranges and caused slight decrease of workability. The early-age compressive strength improved significantly with higher strength at the age of 28 days. Geopolymer microstructure showed considerable portion of calcium-rich aluminosilicate gel resulting from the addition of OPC. 2015 Journal Article http://hdl.handle.net/20.500.11937/38376 10.1016/j.cemconcomp.2014.08.008 Elsevier BV restricted |
| spellingShingle | setting time Portland cement workability compressive strength geopolymer concrete Nath, Pradip Sarker, Prabir Use of OPC to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature |
| title | Use of OPC to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature |
| title_full | Use of OPC to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature |
| title_fullStr | Use of OPC to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature |
| title_full_unstemmed | Use of OPC to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature |
| title_short | Use of OPC to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature |
| title_sort | use of opc to improve setting and early strength properties of low calcium fly ash geopolymer concrete cured at room temperature |
| topic | setting time Portland cement workability compressive strength geopolymer concrete |
| url | http://hdl.handle.net/20.500.11937/38376 |