JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Relationship between Compressive Strength of Geo-polymers and Pre-curing Conditions
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
  • Journal title : Applied Microscopy
  • Volume 43, Issue 4,  2013, pp.155-163
  • Publisher : Korean Society of Electron Microscopy
  • DOI : 10.9729/AM.2013.43.4.155
 Title & Authors
Relationship between Compressive Strength of Geo-polymers and Pre-curing Conditions
Kim, Hyunjung; Kim, Yooteak;
  PDF(new window)
 Abstract
Meta-kaolin (MK) and blast furnace slag (BS) were used as raw materials with NaOH and sodium silicate as alkali activators for making geo-polymers. The compressive strength with respect to the various pre-curing conditions was investigated. In order to improve the recycling rate of BS while still obtaining high compressive strength of the geo-polymers, it was necessary to provide additional CaO to the MK by adding BS. The specimens containing greater amounts of BS can be applied to fields that require high initial compressive strength. Alkali activator(s) are inevitably required to make geo-polymers useful. High temperature pre-curing plays an important role in improving compressive strength in geo-polymers at the early stage of curing. On the other hand, long-term curing produced little to no positive effects and may have even worsened the compressive strength of the geo-polymers because of micro-structural defects through volume expansion by high temperature pre-curing. Therefore, a pre-curing process at a medium range temperature of is recommended because a continuous increase in compressive strength during the entire curing period as well as good compressive strength at the early stages can be obtained.
 Keywords
Geo-polymer;Meta-kaolin;Blast furnace slag;Alkali activator;Compressive strength;
 Language
English
 Cited by
1.
Short-Term Compressive Strength of Fly Ash and Waste Glass Alkali-Activated Cement-Based Binder Mortars with Two Biopolymers, Journal of Materials in Civil Engineering, 2017, 29, 7, 04017045  crossref(new windwow)
 References
1.
Bernal S A, Provis J L, Rose V, and De Gutierrez R M (2011) Evolution of binder structure in sodium silicate-activated slag-metakaolin blends. Cement & Concrete Composites 33, 46-54. crossref(new window)

2.
Buchwald A, Hilbig H, and Kaps C (2007) Alkali-activated metakaolin-slag blends--performance and structure in dependence on their composition. J. Mater. Sci. 42, 3024-3032. crossref(new window)

3.
Glasser F P (1996) Properties of cement waste composites. Waste Manage. 16, 159-168. crossref(new window)

4.
Komnitas K and Zaharaki D (2007) Geopolymerisation: a review and prospects for the minerals industry. Miner Eng. 20, 1261-1277. crossref(new window)

5.
Provis J L, Yong C Z, Duxson P, and van Deventer J S J (2009) Correlating mechanical and thermal properties of sodium silicate fly ash geopolymer. J. Mater. Sci. 336, 57-63.

6.
Regourd M (1995) Cement Portland Hydration-hydraulic Concrete: Knowledge and Practice (ENPC, Paris).

7.
Temuujin J and van Riessen A (2009) Effect of fly ash preliminary calcination on the properties of geopolymer. J. Harzard Mater. 164, 634-639. crossref(new window)

8.
Yip C K, Luckey G C, Provis J L, and van Deventer J S J (2008) Effect of calcium silicate sources on geopolymerisation. Cem. Concr. Res. 38, 554-564. crossref(new window)

9.
Yip C K, Lukey G C, and van Deventer J S J (2005) The coexistence of geopolymeric gel and calcium silicate hydrate at the early stage of alkaline activation. Cem. Concr. Res. 35, 1688-1697. crossref(new window)

10.
Yip C K and van Deventer J S J (2003) Microanalysis of calcium silicate hydrate gel formed within a geopolymeric binder. J. Mater. Sci. 38, 3851-3960. crossref(new window)

11.
Zhao Q, Nair B, Rahimian T, and Balaguru P (2007) Novel geopolymer based composites with enhance ductility. J. Mater. Sci. 42, 3131-3137. crossref(new window)

12.
Zhou J, Qian S, Beltran M G S, Ye G, van Breugel K, and Li V C (2010) Development of engineered cementitious composities with limestone powder and blast furnace slag. Mater. Struct. 43, 803-814. crossref(new window)