Influence of blast-furnace slag on behaviour of dolomite used as a raw material of MgO-type expansive agent
Source abstract
Abstract
Abstract The content of MgO in cement is restricted to less than 5% (by weight) because of its expansive character. However, the cement, called dam cement, containing MgO more than 5% is used in both research activities and industrial applications. Turkey is rich in dolomite reserves and dolomite is abundantly found in several regions of the country. In this study, influence of blast-furnace slag (BFS) on expansion properties of dolomite was explored. Portland Cement (CEM I 42.5R) was replaced with dolomite up to 40% and blast-furnace slag up to 20%. Hydration heat, setting times, soundness and micro-structures of paste samples and compressive strength and length change of mortar samples were measured. As a result of experimental studies, dolomite used instead of cement caused up to 1.75 mm expansion. The results are in accordance with the values indicated in the standards. As a conclusion, it is possible to use blast-furnace slag in balancing the expansion properties of dolomite.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Innovative concrete reinforcement materials · Concrete Properties and Behavior
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (37)
Show source-provided references
1. A quantitative-metallographic study of the sintering behaviour of dolomite10.1016/j.matchar.2004.06.004 ↗
2. Trojer · 1981
3. Activation of ground granulated blast-furnace slag by using calcined dolomite10.1016/j.conbuildmat.2014.06.044 ↗
4. Dolomite: occurrence, evolution and economically important associations10.1016/S0012-8252(00)00022-2 ↗
5. The present state and future outlook of the exploitation & utilization of magnesium resource in sea water and brine about our country
6. The use of dolomite–carbon-lined ladless for the production of superclean steels
7. Ghosh · 2001
8. MgO expansive cement and concrete in China: past, present and future10.1016/j.cemconres.2013.12.007 ↗
9. Dolomite used raw material to produce MgO-based expansive agent10.1016/j.cemconres.2004.09.026 ↗
10. Mechanism of expansion of concrete due to the presence of dead-burnt CaO and MgO10.1016/0008-8846(94)00111-B ↗
11. Expansive admixtures (mainly ettringite)10.1016/S0958-9465(97)00064-4 ↗
12. Mortar expansions due to delayed ettringite formation. Effects of curing period and temperature10.1016/0008-8846(95)00081-M ↗
13. Volume stabilization of high MgO cement: effect of curing conditions and fly ash addition10.1016/S0008-8846(98)00140-9 ↗
14. The kinetics and mechanism of MgO dissolution10.1016/S0009-2614(99)00909-4 ↗
15. Using a new composite expansive material to decrease deformation and fracture of concrete10.1016/j.matlet.2007.04.091 ↗
16. Hydration and setting time of MgO-type expansive cement10.1016/0008-8846(92)90129-J ↗
17. ASTM C595, Standard Specification for Blended Hydraulic Cements, Annual Book of ASTM Standards, 2012.
18. Newman · 2003
19. TS EN 196-1, Methods of Testing Cement-Part 1: Determination of Strength, Turkish Standard Institution, Ankara, 2009 (in Turkish).
20. TS EN 196-3+A1, Methods of Testing Cements-Part 3: Determination of Setting Time and Soundness, Turkish Standard Institution, Ankara, 2010 (in Turkish).
21. ASTM C227, Standard Test Method for Potential Alkali Reactivity of Cement-Aggregate Combinations (Mortar-Bar Method), Concrete and Mineral Aggregates, Annual Book of ASTM Standards, 2010.
22. ASTM C191, Standard Test Methods for Time of Setting of Hydraulic Cement by Vicat Needle, Annual Book of ASTM Standards, 2008.
23. Hydration and temperature development of concrete made with blast-furnace slag cement10.1016/S0008-8846(98)00229-4 ↗
24. Early-age properties, strength development and heat of hydration of concrete containing various South African slags at different replacement ratios10.1016/j.conbuildmat.2011.06.018 ↗
25. Betonun Eşdeğer Yaşının Çimento Hidratasyon Isısıyla Tahmini İçin Bir Yöntem
26. ASTM C151 M-09, Standard Test Method for Autoclave Expansion of Hydraulic Cement, Annual Book of ASTM Standards, 2000.
27. W.A. Klemm, Cement Soundness and the Autoclave Expansion Test: An Update of the Literature, R&D Serial No. 2651 Portland Cement Association, USA, 2005.
28. Strength and hydration products of reactive MgO–silica pastes10.1016/j.cemconcomp.2014.04.003 ↗
29. Hydrothermal synthesis of magnesium silicate montmorillonite for polymer–clay nanocomposites10.1007/s11167-005-0225-z ↗
30. Development of low pH cement systems forming magnesium silicate hydrate (M–S–H)10.1016/j.cemconres.2011.01.016 ↗
31. Influence of shrinkage and water transport mechanisms on microstructure and crack formation of tile adhesive mortars10.1016/j.cemconres.2011.07.007 ↗
32. Modeling of early age behavior of blast-furnace slag concrete based on micro-physical properties10.1016/j.cemconres.2011.06.005 ↗
33. Effects of fly ash and dolomite powder on the properties of self compacting concrete10.1016/j.conbuildmat.2011.03.018 ↗
34. Effects of curing conditions on properties of concrete using slag replacement10.1016/S0008-8846(00)00200-3 ↗
35. Determination of the leaching rate of 134Cs from the immobilized low-level radioactive sources in the cement and cement mixed with dolomite grains and with natural pozzolan powder10.1016/j.pnucene.2010.10.005 ↗
36. Sulfate resistance of mortars produced with granulated blast furnace and steel slag additive cements
37. Production of MgO-type expansive agent in dam concrete by use of industrial by-products10.1016/j.buildenv.2007.01.037 ↗