Effect of Superplasticizers on the Cement Hydration Process

Abstract:

The cement hydration is an exothermic reaction. The hydration heat is characterizing quantitatively the clinker hydration degree. Monitoring its time response makes it possible to determine not only the heat released during a certain time interval but also the concrete mix setting onset, the cement hydration degree (when evaluating the cement applicability after a long storage period) etc. The measurement of the hydration heat or the temperature versus time plot for a hydrating mix makes it possible to identify the effect of the different additives and admixtures on the mix hydration kinetics. This paper deals with the effect of adding two different super-plasticizers (lignin-sulphonate-based and naphthalene-sulphonate-based) on the hydration heat development progress. A set of iso-peribolic calorimeters was used to measure the hydration heat development process. The measurement proper consisted in monitoring and recording the temperature versus time plot for the specimen under test. The released heat amount was determined by calculation from the temperature gradient, the ambience specific thermal losses, the material thermal capacity and the test specimen mass.

• Periodical: Advanced Materials Research (Volume 1100)
• Pages: 3-6
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1100.3
• Online since: April 2015
• Authors: Michal Matysík*, Tomáš Vymazal, Iveta Plšková
• Keywords: Calorimetry, Cement, Hydration, Superplasticizer

References

[1] Brandštetr, J., Polcer, J., Krátký, J., Holešinský, R., Havlica, R.: Possibilities of the use of isoperibolic calorimetry for assessing the hydration behavior of cementitious systems. 2001. Cement and Concrete Research, 31 (6), pp.941-947.

DOI: 10.1016/s0008-8846(01)00495-1

[2] Hela, R., Zach, J., Sedlmajer, M.: Possibilities of regulation of temperature in concrete during hydration by means of selection of suitable input materials. 2014. Applied Mechanics and Materials, 507, pp.199-203.

DOI: 10.4028/www.scientific.net/amm.507.199

[3] Topolář, L., Šimonová, H., Rovnaník, P., Schmid, P.: The effect of the carbon nanotubes on the mechanical fracture properties of alkali activated slag mortars. 2014. Applied Mechanics and Materials, 617, pp.243-246.

DOI: 10.4028/www.scientific.net/amm.617.243

[4] Pazdera, L., Topolar, L.: Application acoustic emission method during concrete frost resistance. 2014. Russian Journal of Nondestructive Testing, 50 (2), pp.127-131.

DOI: 10.1134/s1061830914020065

[5] Topolář, L., Pazdera, L.: Acoustic emission in protected and non-protected concrete during the first 24 hours. 2014. Applied Mechanics and Materials, 578-579, pp.1149-1152.

DOI: 10.4028/www.scientific.net/amm.578-579.1149

[6] Matysík, M., Plšková, I., Chobola, Z.: Estimation of impact-echo method for the assessment of long-term frost resistance of ceramic tiles. 2014. Advanced Materials Research, 1000, pp.285-288.

DOI: 10.4028/www.scientific.net/amr.1000.285

[7] Šimonová, H., Kucharczyková, B., Havlíková, I., Seitl, S., Keršner, Z.: Complex evaluation of fatigue tests results of plain C30/37 and C45/55 class concrete specimens. 2014. Key Engineering Materials, 592-593, pp.801-804.

DOI: 10.4028/www.scientific.net/kem.592-593.801

[8] Korenska, M., Manychova, M., Pazdera, L., Topolar, L.: Monitoring of the damage in stone blocks by means of non-destructive methods. 2014. Key Engineering Materials, 592-593, pp.545-548.

DOI: 10.4028/www.scientific.net/kem.592-593.545

[9] Korenska, M., Manychova, M., Pazdera, L.: Experimental study of the nonlinear effects generated in a concrete structure with damaged integrity. 2013. Russian Journal of Nondestructive Testing, 49 (9), pp.530-537.

DOI: 10.1134/s1061830913090040

[10] Miroslav, L., Kusak, I., Chobola, Z.: Dielectric properties of concrete specimens after heat stress.

[11] 2014. Applied Mechanics and Materials, 446-447, pp.1389-1394.

[12] Matysík, M., Topolář, L., Daněk, P., Šimonová, H., Vymazal, T., Plšková, I.: An experimental study on acoustic emission signals during the three-point bending fracture test. 2014. Advanced Materials Research, 1000, pp.281-284.

DOI: 10.4028/www.scientific.net/amr.1000.281

[13] Tupý, M., Štefková, D., Sotiriadis, K., Krmíček, L., Carbol, L., Petránek, V.: Recycled poly(vinyl butyral) used as a barrier to prevent mortar carbonation. 2014. Advanced Materials Research, 1000, pp.28-34.

DOI: 10.4028/www.scientific.net/amr.1000.28

[14] Chobola, Z., Štefková, D., Šamárková, K.: The use of acoustic methods for non-destructive testing of high-temperature-degraded cement-based composite. 2014. Applied Mechanics and Materials, 446-447, pp.1395-1399.

DOI: 10.4028/www.scientific.net/amm.446-447.1395

[15] Vymazal, T., Žižková, N., Misák, P.: Prediction of the risks of design and development of new building materials by fuzzy inference systems. 2009. Ceramics - Silikaty, 53 (3), pp.216-224.

[16] Misák, P., Kucharczyková, B., Vymazal, T., Danek, P., Schmid, P.: Determination of the quality of the surface layer of concrete using the tpt method and specification of the impact of humidity on the value of the air permeability coefficient. 2010. Ceramics - Silikaty, 54 (3), pp.290-294.

[17] Kusák, I., Luňák, M., Chobola, Z.: Non-destructive tracking of structural changes of concrete mixtures during thermal stress. 2014. Applied Mechanics and Materials, 617, pp.152-155.

DOI: 10.4028/www.scientific.net/amm.617.152

[18] Vanek, J., Dolensky, J., Chobola, Z., Lunak, M.: Microplasma analysis and noise spectroscopy of c-Si solar cells. 2012. ECS Transactions, 40 (1), pp.177-185.

DOI: 10.1149/1.4729101

[19] Plšková, I., Chobola, Z., Matysík, M.: Assessment of ceramic tile frost resistance by means of the frequency inspection method. 2011. Ceramics - Silikaty, 55 (2), pp.176-182.

[20] Zach, J., Kminová, H., Horky, O., Brozovsky, J.: Determination of intensity of hydration heat development of silicate binders. 2005. 8th International Conference of the Slovenian Society for Non-Destructive Testing: Application of Contemporary Non-Destructive Testing in Engineering, pp.375-382.

[21] Šiler, P., Kolářová, I., Krátký, J., Havlica, J., Brandštetr, J.: Influence of superplasticizers on the course of Portland cement hydration. 2014. Chemical Papers. 68(1). pp.90-97.

DOI: 10.2478/s11696-013-0413-x