Geopolymers
Inorganic polymeric new materials
Author:
Authors:
and
V. Rahhal
V. Rahhal
U.N.C.P.B.A Departamento de Ingeniería Civil, Facultad Ingeniería Av. del Valle 5737 B7400JWI Olavarría Argentina
Search for other papers by V. Rahhal in
Current site
Google Scholar
PubMed
Search for other papers by V. Rahhal in
Current site
Google Scholar
PubMed
R. Talero
R. Talero
C.S.I.C Instituto C.C. “Eduardo Torroja” Serrano Galvache No 4 28033 Madrid Spain
Search for other papers by R. Talero in
Current site
Google Scholar
PubMed
Search for other papers by R. Talero in
Current site
Google Scholar
PubMed
Abstract
This research reports on the effects of including natural pozzolans in two Portland cements with different mineralogical compositions, with and without excess gypsum at amounts equivalent to 7.0% SO3. The main analytical techniques used to study these effects were: the amount of water needed to make a paste of normal consistency, the 2-day Frattini pozzolanicity test and conduction calorimetry. The results obtained showed that these natural pozzolans caused contradictory (accelerating and retarding) effects on the rheology of the resulting cements, depending on the mineralogical composition of the respective Portland clinkers as well as the reactive chemical composition of the pozzolans, in particular their reactive alumina content (Al2O3r−). The addition of gypsum also caused acceleration and delays in the calorimetric evolution of the resulting pastes, which proved to be heavily dependent upon the more or less aluminic chemical character of the natural pozzolans studied. This, in turn, was conditioned by the higher or lower Al2O3r− content (for the SiO2r− content was of a very similar order of magnitude in all three pozzolans analyzed). The Al2O3r− content was likewise responsible for paste behaviour in the afore-mentioned trials and analyses, and the pozzolanic activity exhibited by the compound was found to be more specific than generic, indirectly stimulating C3A hydration more intensely and rapidly than C3S hydration in PC1, one of the two Portland cements used. Indeed, when these natural pozzolans exhibited such prior pozzolanic activity in the second cement studied, PC2, the hydration of its 79.5% of C3S was not indirectly stimulated to the same degree; rather, the contrary effect was observed, i.e., this cement was physically diluted by the three pozzolans. Pozzolan O stimulated hydration directly and non-directly more than indirectly, while pozzolan C acted conversely, and A exhibited varying combinations of the two patterns. The physical state of the reactive alumina, Al2O3r−, in these three natural pozzolans, must be more amorphous than vitreous, i.e., resembling metakaolin more than fly ash in this regard. That notwithstanding, the reactive alumina content in each pozzolan must have conditioned the water/cementitious material ratio obtained for the respective blends with both types of Portland cement (a finding that could be used in future for speedy, simple, reliable and economical characterization), as well as their specific pozzolanicity developed and the rate and total heat of hydration generated by such blended cements.
ProCite
RefWorks
Reference Manager
BibTeX
Zotero
EndNote
-
1.
Taylor HFW . La química de los cementos, vol. II, cap. 14—Ediciones Urmo, C/Espartero, 10, Bilbao, España, 1971 (in Spanish).
-
2.
Mehta PK . Pozzolanic and cementitious byproducts as mineral admixtures dor concrete—a critical review. Fly ash, silica fume slag & other mineral by products in concrete. ACI SP 79-1. 1993. pp. 1–46.
-
3.
Moya JS Aza S Sanz J Madani A Serratosa JM . Aluminum-27 and silicon-29 magic-angle spinning magnetic resonance study of the kaolinite-mullite transformation. J Am Ceram Soc. 1988; 71(10):C–418.
-
4.
Instrucción para la Recepción de Cementos RC-03 (R.D. 1797/2003, de 26 de diciembre; B.O.E. núm. 14 de 16 de enero 2004).
-
5.
EN 197-1 Standard = UNE 80-225-93 Standard. Test methods for cements: chemical analysis. Determination of the reactive silica (SiO2) content in cements, pozzolans and fly ashes. AENOR, Calle Génova no 6, 28004, Madrid, Spain.
-
6.
ASTM C 618-94a Standard. Standard specification for coal fly ash and raw or calcined natural pozzolan for use as a mineral admixture in Portland cement concrete. Annual Book of ASTM Standards, Section 04, Vol. 04.02 Concrete and aggregates. 1995. p. 304-6.
-
7.
Talero R . Contribution to the analytical and physical-chemistry study of the system: pozzolanic cements-gypsum-water (at 20 ± 2 °C). Ph.D. Thesis, Complutense University of Madrid, Ftad. CC. Químicas, 20 November 1986.
-
8.
Mehta PK . Effect of the fly ash composition on sulfate resistance of cement. ACI J Mater. 1986; 83(6): 994–1000.
-
9.
Tikalsky PJ Carrasquillo RL . Influence of fly ash on the sulfate resistance of concrete. ACI J Mater. 1992; 89(1): 69–75.
-
10.
Talero R Bollati M-R Hern´ndez-O F . Manufacturing non-traditional mortars and concretes by OPC, metakaolin and gypsum (15.05&). Mater Constr. 1999; 49(256): 29–41.
-
11.
Talero R . Kinetochemical and morphological differentiation of ettringites by the Le Chatelier-Ansttet test. Cem Concr Res. 2002; 32: 707–17 .
-
12.
Martín-L MP . Sulfate resistance and mechanical strengths behaviour of some crystalline and amorphous components in fly ashes. PhD Thesis, Autónoma University of Madrid, Spain, 29 May 1997.
-
13.
Mejía R . Contribution to the analytical and physical-chemistry study of the system: Portland cements-Pozzolans-GGBS-Water (at 20 ± 2 °C). Ph.D. Thesis, Complutense University of Madrid, Ftad. CC. Químicas, 29 November 1997.
-
14.
Mejía R Delvasto S Talero R . Chloride diffusion measured by a modified permeabilty test in normal and blended cements. Adv Cem Res 2003; 15(3): 113–8.
-
15.
Rahhal V . Characterization of pozzolanic additions by conduction calorimetry. Ph.D. Thesis, Politechnic University of Madrid, E.T.S. Ings. Caminos, Canales y Puertos, 12 December 2002.
-
16.
Takemoto K Uchikawa H . Hydratation des ciments pouzzolaniques. In: Proceedings of 7th International congress on the chemistry of cement. 1980. Vol. I, Theme IV, p. 2/1–2/29.
-
17.
Rahhal V Batic O . Mineral admixtures contribution to heat of hydration development. Cem Concr Aggreg. 1994; 19: 150–8.
-
18.
Shannag MJ Yeginobali A . Properties of pastes, mortars and concretes containing natural pozzolan. Cem Concr Res. 1995; 25: 647–57 .
-
19.
Rahhal V Batic O . Seguimiento de la reacción puzol´nica de cementos compuestos por DRX. Anales de la Asociación Química Argentina, 1995; 83 (1-2): 35–47.
-
20.
Tashiro Ch Ikeda K Inoue Y . Evaluation of pozzolanic activity by the electric resistance measurement method. Cem Concr Res. 1994; 24: 1133–9 .
-
21.
de Lux´n MP . Estudio de las puzolanas de origen volc´nico mediante espectroscopia de absorción infrarroja. Cuadernos de Investigación, Instituto Eduardo Torroja. 1976; 32: 5–21.
-
22.
Amer AA . Thermal analysis of hydrated fly ash-lime pastes. J Therm Anal Calorim. 1998; 54: 837–43 .
-
23.
Giergiczny Z . Effect of some additives on the reactions in fly ash-Ca(OH)2 system. J Therm Anal Calorim. 2004;76: 747–54 .
-
24.
El-Shimy E Abo-El-Enein SA El-Didamony H Osman TA . Physico-chemical and thermal characteristics of lime-silica fume pastes. J Therm Anal Calorim. 2000; 60: 549–56 .
-
25.
Mullick AK Babu KH Bhaskara Rao P . Evaluation of pozzolanic activity and its impact on specification of blended cements. In: 8th international congress on the chemistry of cement. 1986. Vol. VI, p. 308–11.
-
26.
Mindess S . Young J. Concrete. Englewood Cliffs, NJ: Prentice-Hall, Inc. 1981.
-
27.
Ushiyama H Shigetomi Y Inoue Y . Effect of gypsum on the hydration of alite and belite. In: 10th international congress on the chemistry of cement, Gothenburg, Sweden. 1997. Vol. II, 4 p., June 2-6.
-
28.
Norma UNE-EN 196-3:2005. Método de ensayo de cementos. Parte 3: determinación del tiempo de fraguado y de la estabilidad de volumen. AENOR, Calle Génova, 6, 28004, Madrid.
-
29.
Pliego de Prescripciones Técnicas Generales para la Recepción de los Conglomerantes Hidr´ulicos RC-75 (BOE no 206 de 28 de agosto de 1975) & EN 196-5 Standard (Pozzolanicity test for POZCs). AENOR (= Frattini, N. Ann .Chim. Applicata, 1949;39: 616–20.
-
30.
Talero R Rahhal V . Influence of aluminic pozzolans, quartz and gypsum additions on portland cement hydration. In: Proceedings of 12th international congress on the chemistry of cement, W2-05.2, Montreal, Canada. 8-13 July 2007.
-
31.
Rahhal V Talero R . Calorimetry of portland cements with metakaolíns, quartz and gypsum additions. J Therm Anal Calorim. 2008; 91: 825–34 .
-
32.
Talero R Rahhal V . Calorimetric comparison of portland cement containing silica fume and metakaolin: is silica fume, like metakaolin, characterized by pozzolanic activity that is more specific than generic?. J Therm Anal Calorim. 2009; 96(2): 383–93 .
-
33.
ASTM C 845-90 Standard. Specification for expansive hydraulic cement. Annual Book of ASTM Standards, Section 4 Construction, Vol. 04.01 Cement; Lime; Gypsum. 1995. p. 390-3.
-
34.
Rahhal V Talero R . Early hydration of portland cement with crystalline mineral additions. Cem Concr Res. 2005; 35: 1285–91 .
-
35.
Rahhal V Bonavetti V Delgado A Pedrajas C Talero R . Scheme of the portland cement hydration with crystalline mineral admixtures and other aspects. Silicates Industriels, Ref. No.: C-188. 19 January 2009 (accepted for publication; in press).
-
36.
Rahhal V Talero R . Influence of two different fly ashes on the hydration of portland cements. J Therm Anal Calorim. 2004; 78: 191–205 .
To see the editorial board, please visit the website of Springer Nature.
Manuscript Submission: HERE
For subscription options, please visit the website of Springer Nature.
| Journal of Thermal Analysis and Calorimetry | |
|---|---|
| Language | English |
| Size | A4 |
| Year of Foundation |
1969 |
| Volumes per Year |
1 |
| Issues per Year |
24 |
| Founder | Akadémiai Kiadó |
| Founder's Address |
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. |
| Publisher | Akadémiai Kiadó Springer Nature Switzerland AG |
| Publisher's Address |
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11. |
| Responsible Publisher |
Chief Executive Officer, Akadémiai Kiadó |
| ISSN | 1388-6150 (Print) |
| ISSN | 1588-2926 (Online) |
Monthly Content Usage
| Abstract Views | Full Text Views | PDF Downloads | |
|---|---|---|---|
| Jul 2024 | 13 | 0 | 0 |
| Aug 2024 | 26 | 0 | 0 |
| Sep 2024 | 18 | 1 | 1 |
| Oct 2024 | 70 | 0 | 0 |
| Nov 2024 | 53 | 0 | 0 |
| Dec 2024 | 33 | 0 | 0 |
| Jan 2025 | 8 | 0 | 0 |
Temperature dependence of the rate of reaction in thermal analysis
The Arrhenius equation in condensed phase kinetics
Author:
Copyright Akadémiai Kiadó AKJournals is the trademark of Akadémiai Kiadó's journal publishing business branch.
Powered by PubFactory