Technology and Physico-Mechanical Properties of Claydite Foam Concrete for Monolithic and Prefabricated Construction

Theoretical and experimental investigations have resulted in obtaining an effective insulating and structural material (claydite foam concrete) that is not subjected to slump and shrinkage in the range of main grades used in construction in terms of average density D300–D700, characterized by 5–31 % greater strength and 8–27 % elasticity modulus, as well as a higher (£30.7 %) level of vapor permeability and moisture return (by 17.4–46.7 %) with lower values (by 10.0–83.2 %) of water absorption, sorption moisture and thermal conductivity in comparison with aerated concrete of autoclave hardening and foam concrete of equal density. A three-stage technology has been developed for preparing claydite foam concrete. At the first stage cement dough is prepared and if it is necessary an optimum amount of hardening accelerator (1 % CaCl2 from cement mass) and additives condensing cement stone structure (1 % Al2SO4 from cement mass ) are introduced into it, they prevent slump of a binder (foam concrete) during the subsequent hardening, and in combination with 0.5 % from cement mass “Hydroxypropylmethylcellulose УСК-200 TT” – and shrinkage of foam and claydite foam concrete during the subsequent drying. At the second stage, the binder is aerated while introducing protein-based foam agent (Laston) into the cement dough in an optimal amount (depending on the given density) 0.5–1.3 % from the cement mass; and at the third stage, expanded clay gravel is introduced into prepared foam concrete mixture (in rational amount of approximately 0.7–0.8 m3 per 1 m3 of claydite foam concrete) with continuous mixing for 60–90 seconds. Methodologies for calculation of foamand claydite foam concrete compositions have been developed; molding modes of expanded clay foam concrete with high degree of homogeneity (variation coefficient of density and strength uk £ 6.2 % in the process of manufacturing molding with layer height up to 1500 mm) have been justified that confirms efficiency of the proposed technology.

1. Zhukov D. D. (1999) Thermal-Insulating Materials. Belorussky Stroitelny Rynok [Belarusian Construction Market], (14), 2–7 (in Russian).

2. Lygach I. O., Mordich M. M. (2009) New Materials and Technologies for Construction of Buildings From Light Power-Efficient Structures.Arkhitektura i Stroitelstvo [Architecture and Construction], (3), 34–37 (in Russian).

3. Lygach I. O., Mordich M. M. (2008) New Materials and Technologies for Construction of Light Energy-Saving Buildings. Belorussky Stroitelny Rynok [Belarusian Construction Market], (8), 8–11 (in Russian).

4. Mordich M. M. (2016) Influence of Hardening-Accelerating Agent on Physical and Mechanical Indices of Foam Concrete Quality for Cast-In-Situ Construction. Perspektivy Razvitiya Novykh Tekhnologii v Stroitel'stve i Podgotovke Inzhenernykh Kadrov: Materialy XX Mezhdunar. Nauch.-Metod. Sem. GrGU imeni Ya. Kupaly, Grodno, 2016 g. [Prospects for Development of New Technologies in Construction and Training of Engineering Personnel: Proceedings of ?? International Scientifc and Methodological Workshop of Yanka Kupala State University of Grodno, 2016]. Grodno, 2016, 147–152 (in Russian).

5. Mchedolov-Petrosyan O. P. (1965) Portland CementBased Expanding Composition (Chemistry and Technology). Moscow, Stroyidat Publ. 137 (in Russian).

6. Batyanovsky E. I., Ryabchikov P. V., Yakimovich V. D. (2009) Theoretical Prerequisites and Efficiency for Use of Carbonic Nano-Materials in Cement Concrete. Problemy Sovremennogo Betona i Zhelezobetona: Sb. Tr. Ch. 2. Tekhnologiya Betona [Problems of Modern Concrete and Reinforced Concrete: Collected Papers. Part 2. Concrete Technology] Minsk, Minsktipproyekt Publ., 100–117 (in Russian).

7. Ryabchikov P. V., Batyanovsky E. I. (2015) The Prospects of Application of Carbon Nanomaterials in the Heavy Concrete Technology.ALITinform – Mezhdunarodnoe Analiticheskoe Obozrenie “Tsement. Beton. Sukhie Smesi” = ALITinform – International Analytical Review “Cement. Concrete. Dry Mix”, 41 (6), 26–35 (in Russian).

8. Batyanovsky E. I., Mordich M. M., Galuzo G. S. (2011) Peculiar Features for Application of Carbonic Nano-Materials in Constructional and Thermal Insulation Foam Concrete. Nauka – Obrazovaniyu, Proizvodstvu i Ekonomike: Materialy IX Mezhdunar. Nauch.-Tekhn. Konf., Minsk, 2011 g. [Science for Education, Industry and Economics: Proceedings of IX International Scientific and Technical Conference, MInsk, 2011]. Minsk, Belarusian National Technical University, 272–273 (in Russian).

9. Kiselev D. P., Kudryavtsev A. A. (1966) Light-Weight Porous Concrete. Moscow, Stroyizdat Publ. 81 (in Russian).

10. Tikhomirov V. N. (1983) Foam. Theory and Practice for its Obtaining and Destruction. Moscow, Khimiya Publ. 264 (in Russian).

11. Simonov M. Z. (1973) Fundamentals of Technology for Light-Weight Concrete. Moscow, Stroyizdat Publ. 584 (in Russian).

12. Itskovich S. M., Galuzo G. S. (1981) Light-Weight Concrete. Minsk, 1981. 25 (in Russian).

13. Nanazashvili I. Kh. (1990) Construction Materials, Products and Structures. Moscow, Vysshaya Shkola Publ., 140–150 (in Russian).

14. Dorofeev V. S. [et al.] Strength and Deformative Properties of Concrete and Structures with Porous Aggregates of South Ukraine. Problemy Sovremennogo Betona i Zhelezobetona: Sb. Tr. Ch. 2. Tekhnologiya Betona [Problems of Modern Concrete and Reinforced Concrete: Collected Papers. Part 2. Concrete Technology]. Minsk, Minsktipproyekt Publ., 189–207 (in Russian).

15. Krivitsky M. Ya., Levin N. I., Makarichev V. V. (1972) Cellular Concrete: Technology, Properties and Structures. Moscow, Stroyizdat Publ., 136 (in Russian).