INFLUENCE OF WATER-CEMENT RATIO AND SUPERPLASTICIZERS ON THE HEAT RELEASE, CEMENT HYDRATION AND HARDENING PROCESSES

Il'ya Mihajlovich Ivanov, Denis Valer'evich Matveev, Aleksandr Anatol'evich Orlov, Lyudmila Yakovlevna Kramar

Abstract


The regularities of influence of water-cement ratio (W/C) and superplasticizers on heat release, phase composition and strength in the process of cement hydration and hardening are revealed in the paper. It has been established that an increased W/C ratio causes not only an increase in the induction period and a slowdown in the hydration of cement, but also the formation of a different composition 

of the hydrate phases. It has been found that the integral heat emissions, both at increased W/C = 0.5 and late cement hydration, do not have a directly proportional dependence on the strength generation rate. The inexpediency of using calorimetric analysis of cement systems at W/C = 0.5 for research purposes, connected primarily with the production of highly functional concretes, has been justified.


Keywords


calorimetry, microcalorimetry, heat release, heat flow, heat energy, kinetics of hydration and harden-ing, water-cement ratio, superplasticizer, cement, highly functional concrete

References


Mchedlov-Petrosyan O.P., Usherov-Marshak A.V., Urzhenko A.M. Teplovydelenie pri tverdenii vyazhushchikh veshchestv i betona [Heat Emission during Solidification of Binders and Concrete]. Moscow, StroyizdatPubl., 1984. 224 p.

Usherov–Marshak A.V. [General Regularities of the Solidification of Inorganic Binders]. Doklady Akade-mii nauk SSSR [Reports of the Academy of Sciences of the USSR], 1984, vol. 256, no. 2, pp. 417–420 (in Russ.).

Usherov–Marshak A.V., Korobov A.I. Mathematical Models of Thermokinetic Analysis of Hydration of Binders]. Tsement [Cement], 1987, no. 11, pp. 12–15 (in Russ.).

Plugin A.N., Usherov-Marshak A.V., Sibiryakova I.A., Mchedlov-Petrosyan O.P. [Efficiency of Stabiliza-tion of Technological Characteristics of Cement]. Tsement [Cement], 1977, no. 10, pp. 14–15 (in Russ.).

Usherov-Marshak A.V., Sopov V.P. [Calorimetric Analysis of the Interaction in Dispersed Systems Using the Example of Binders]. Neorganicheskie materialy [Inorganic Materials], 1996, vol. 32, no. 2, pp. 249–253 (in Russ.).

Vovk A.I., Usherov-Marshak A.V. [Physicochemical Features of Hydration of Binders with Low Water Consumption]. Neorganicheskie materialy [Inorganic Materials], 1993, vol. 29, no. 5, pp. 708–710 (in Russ.).

Wilding C., Walter A., Dauble D. [Classification of Inorganic and Organic Admixtures by Condition Calo-rimetry]. Cement and Concrete Research, 1984, vol. 14, pp. 185–194.

Usherov-Marshak A.V. [Selectivity of the Action of Chemical Additives on Cement Solidification Pro-cesses]. Neorganicheskie materialy [Inorganic Materials], 1999, vol. 35, no. 12, pp. 1531–1534 (in Russ.).

Gurevich V.M., Markov A.I. [Method Calorimetric Studies of Cement Hydration]. Tsement [Cement], 1987, no. 12. pp. 20–21 (in Russ.).

Shuldyakov K., Kramar L., Trofimov B., Ivanov I. [Superplasticizer Effect on Cement Paste Structure and Concrete Freeze-thaw Resistance]. Advanced Materials in Technology and Construction (AMTC-2015), AIP Publishing, 2016. 1698, pp. 070011-1- 070011-6.

Gorshkov V.S., Timashev V.V., Savel'ev V.G. Metody fiziko-khimicheskogo analiza vyazhushchikh veshchestv [Methods of Physico-Chemical Analysis of Binders]. Moscow, High school Publ., 1981. 335 p.

Butt Yu.M., Sychev M.M., Timashev V.V. Khimicheskaya tekhnologiya vyazhushchikh materialov [Chemical Technology of Binders]. Moscow, 1980. 472 p.

Teylor Kh. Khimiya tsementa [Chemistry of Cement.]. Moscow, Mir Publ., 1996. 560 p.

Alimov L.A., Voronin V.V., Astakhov N.N., Bazhenov Yu.M. Sposob opredeleniya stepeni gidratatsii tsementa [Method for Determining the Degree of Cement Hydration]. Patent USSR, no. 1474548, 1989.

Kondo R., Ueda Sh. [Kinetics and Mechanism of Cement Hydration]. Pyatyy mezhdunarodnyy kon-gress po khimii tsementa [Fifth International Congress on Chemistry of Cement]. Moscow, Stroyizdat Publ, 1973,

pp. 185–204 (in Russ.).

Bazhenov Yu.M. Tekhnologiya betona: uchebnoe posobie dlya vuzov [Concrete Technology: A Text-book for Universities]. Moscow, ASV Publ., 2007, 528 p.

Adamtsevich A.O., Pustovgar A.P., Solov''ev V.G., Pashkevich S.A. [Actual Aspects of the Practical Ap-plication of Calorimetry Methods in the Study of Kinetics of Hydration of Binders in Building Materials]. Inte-gratsiya, partnerstvo i innovatsii v stroitel'noy nauke i obrazovanii [Integration, Partnership and Innovation in Building Science and Education]. Moscow, Moscow State University of Civil Engineering Publ., 2012, pp. 354–360 (in Russ.).

Adamtsevich A.O., Pashkevich S.A., Pustovgar A.P. [Use of Calorimetry to Predict the Growth in the Strength of Cement Systems of Accelerated Solidification]. Inzhenerno-stroitel'nyy zhurnal [Engineering and con-struction magazine], 2013, no. 3, pp. 36–42 (in Russ.).


Refbacks

  • There are currently no refbacks.