Plastic Concrete Reuse Using Extended Set-Retarding Admixtures
This paper reports a preliminary experimental study on the effect of extended setretarding admixture or ‘stabiliser’ on the plastic and hardened properties of grouts and concretes containing general purpose Portland cement, blended cement and low heat cement. The effect of stabiliser on efflux time...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Conference Paper |
| Published: |
The Concrete Institute of Australia
2011
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/21451 |
| _version_ | 1848750593949040640 |
|---|---|
| author | Mali, Sarvesh Ahmed, Shaikh Nikraz, Hamid |
| author2 | Not listed |
| author_facet | Not listed Mali, Sarvesh Ahmed, Shaikh Nikraz, Hamid |
| author_sort | Mali, Sarvesh |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This paper reports a preliminary experimental study on the effect of extended setretarding admixture or ‘stabiliser’ on the plastic and hardened properties of grouts and concretes containing general purpose Portland cement, blended cement and low heat cement. The effect of stabiliser on efflux time or ‘flow time’ of GP cement grout was studied and the dosage required to achieve an efflux time of 35 seconds was estimated. The results showed a linear relationship with increasing stabiliser dosage extending the holding time of the grout. The effect of stabiliser on the timing and measure of peak hydration temperature was then assessed and the results showed that for GP cement and GB cementitious grouts, peak temperatures were lower after adding stabiliser, and for all three grouts the time to peak hydration was significantly increased. Finally, the effect of stabiliser on the plastic and hardened properties of fresh concrete, stabilised concrete, and a blend of fresh and stabilised concrete was assessed. The results showed that the initial one hour slumps and the final slumps of the blended concretes were all within tolerance. The results also showed that adding stabiliser to the concretes did not a significantly reduce compressive strength when compared to the original, non-stabilised concretes. |
| first_indexed | 2025-11-14T07:39:18Z |
| format | Conference Paper |
| id | curtin-20.500.11937-21451 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:39:18Z |
| publishDate | 2011 |
| publisher | The Concrete Institute of Australia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-214512017-01-30T12:25:18Z Plastic Concrete Reuse Using Extended Set-Retarding Admixtures Mali, Sarvesh Ahmed, Shaikh Nikraz, Hamid Not listed stabiliser environment flow cone recycling peak temperature rise returned plastic concrete extended set-retarder Ready mix concrete cementitious material type of cement This paper reports a preliminary experimental study on the effect of extended setretarding admixture or ‘stabiliser’ on the plastic and hardened properties of grouts and concretes containing general purpose Portland cement, blended cement and low heat cement. The effect of stabiliser on efflux time or ‘flow time’ of GP cement grout was studied and the dosage required to achieve an efflux time of 35 seconds was estimated. The results showed a linear relationship with increasing stabiliser dosage extending the holding time of the grout. The effect of stabiliser on the timing and measure of peak hydration temperature was then assessed and the results showed that for GP cement and GB cementitious grouts, peak temperatures were lower after adding stabiliser, and for all three grouts the time to peak hydration was significantly increased. Finally, the effect of stabiliser on the plastic and hardened properties of fresh concrete, stabilised concrete, and a blend of fresh and stabilised concrete was assessed. The results showed that the initial one hour slumps and the final slumps of the blended concretes were all within tolerance. The results also showed that adding stabiliser to the concretes did not a significantly reduce compressive strength when compared to the original, non-stabilised concretes. 2011 Conference Paper http://hdl.handle.net/20.500.11937/21451 The Concrete Institute of Australia fulltext |
| spellingShingle | stabiliser environment flow cone recycling peak temperature rise returned plastic concrete extended set-retarder Ready mix concrete cementitious material type of cement Mali, Sarvesh Ahmed, Shaikh Nikraz, Hamid Plastic Concrete Reuse Using Extended Set-Retarding Admixtures |
| title | Plastic Concrete Reuse Using Extended Set-Retarding Admixtures |
| title_full | Plastic Concrete Reuse Using Extended Set-Retarding Admixtures |
| title_fullStr | Plastic Concrete Reuse Using Extended Set-Retarding Admixtures |
| title_full_unstemmed | Plastic Concrete Reuse Using Extended Set-Retarding Admixtures |
| title_short | Plastic Concrete Reuse Using Extended Set-Retarding Admixtures |
| title_sort | plastic concrete reuse using extended set-retarding admixtures |
| topic | stabiliser environment flow cone recycling peak temperature rise returned plastic concrete extended set-retarder Ready mix concrete cementitious material type of cement |
| url | http://hdl.handle.net/20.500.11937/21451 |