Products of Reaction between Barium Chloride and Sodium Hyrdosilicates: Examination of Composition

Abstract:

Article Preview

One of the promising directions of quality improvement of building materials (based on various binders) is to use hydrosilicates of calcium and barium. In particular, it is known that the application of calcium hydrosilicates can improve the compression strength in two or three times; the fracture toughness can be increased in two times and more. Prospects of using barium hydrosilicates in cement systems are due to the similarity of the chemical composition (with calcium hydrosilicates) and advantages of barium cements compared to traditional cements. It is advisable to synthesize the barium hydrosilicates by means of low-temperature technology. To investigate the influence of the curing agent (barium chloride) to the properties of the reaction products in the present study the IR spectroscopy and differential scanning calorimetry (DSC) are used. Analysis of the results allowed to state that the main reaction product is a crystalline silicate phase. Reducing the amount of curing agent leads to an increase of the content of silicic acid. DSC results show that dehydration of barium hydrosilicates takes place in two stages. It is typical for systems BaO•SiO2•6H2O. Increasing the content of silicic acid is accompanied by an endothermic effect in temperature range of 120...130 °C. Joint analysis of the results of IR spectroscopy and DSC leads to the conclusion that there is a reaction of barium carbonate and silicic acid. In general case, reduction of the amount of the curing agent contributes to increase of content of the silica acid and barium carbonate. Therefore, it is advisable to use compositions prepared with reduced amount of BaCl2 in systems capable of interacting with the silica acid and forming the insoluble products.

Info:

Periodical:

Edited by:

Anna Bogdan and Nikita Martyushev

Pages:

347-350

DOI:

10.4028/www.scientific.net/AMR.1040.347

Citation:

A. N. Grishina et al., "Products of Reaction between Barium Chloride and Sodium Hyrdosilicates: Examination of Composition", Advanced Materials Research, Vol. 1040, pp. 347-350, 2014

Online since:

September 2014

Export:

Price:

$38.00

* - Corresponding Author

[1] V. I Loganina et al., Application of Supplements based on Calcium Hydrosilicates for Dry Construction Mixes, Dry Mixes. 1 (2012) 16-17 (in Russian).

[2] P.S. Gordienko et al., Calcium Monosilicates as a Components of Composite Materials, Chemical Technology. 3 (2009) 143-149 (in Russian).

[3] L.A. Meledina, New Fillers and Adhesion Promoters for Rubber Derived Synthetic Layered Silicates. PhD th., Moscow, 2006 (in Russian).

[4] G.N. Shabanova, Investigation of the Mechanism of Hardening of Hydration Products of Barium Cements, Problems of Chemistry and Chemical Technology. 1 (2003) 51-56 (in Russian).

[5] A.N. Grishina et al., The Choice of Technology of Radiation-protective Materials based on Hydrosilicates of Heavy Metals, Construction: Science and Education. 2 (2011) 3-4 (in Russian).

[6] A.N. Grishina et al., Shrinkage of Radiation-protective Building Materials based on Liquid Glass, Building Materials. 6 (2010) 59-61 (in Russian).

[7] E.V. Korolev et al., Parameters of State of Radiation-protective Building Materials based on Liquid Glass and Barium Chloride, Proceedings of the Kazan State Architectural University. 15 (2011) 172-176 (in Russian).

[8] S.B. Yarusova, Synthesis and Properties of Calcium Silicates in Multicomponent Systems, PhD th., Vladivostok, 2010 (in Russian).

[9] G.D. Chukin, Surface Chemistry and Structure of Fumed Silica, Paladin LLC, Moscow, (2008).

[10] T.I. Shishelova et al., Workshop on spectroscopy. Water in minerals, Academy of Natural Sciences, Moscow, 2010 (in Russian).

[11] V.S. Gorshkov et al., Physical and Chemical Analysis of Binders, High School, Moscow, 1981 (in Russian).

[12] P. Pradyot, Handbook of Inorganic Chemicals, McGraw-Hill, New York, (2002).

In order to see related information, you need to Login.