CLINKERLESS COMPLEX BINDER FROM REFRACTORY WASTE
AND OBJECTS BASED ON IT
V. N. Sokov,
S. D. Sokova,
and V. V. Sokov
Translated from Novye Ogneupory, No. 8, pp. 37 – 39, August, 2016.
Original article submitted March 3, 2016.
A dependence is revealed for carbonization of CLGG-binder stone on binder composition and heat treatment
parameters. As a result of this there is a marked change in the nature of cementing newly-formed stone that is
reflected in its operating life. In order to obtain material resistant to carbonization a four-factor experiment is
implemented and the combination of binder components, and heat treatment parameters are determined. Dif
ferent ratios of binder with fine filler, binder composition, and isothermal heating temperature, and also the ef
fect of production factors on cement strength deformation properties, are determined. It is noted that strength
in compression of fine-grained concrete in dry and water saturated conditions steaming temperature and
amount of filler have the greatest effect on condition.
Keywords: carbon dioxide gas, operating life, carbonization, cemented new formations, crystallization ca-
pacity, destructive changes, carbonizer, concrete deformation properties, water saturation, water absorption,
softening factor, adhesion, filler size modulus, glass-like particles, frost resistance.
PART 5. STUDY OF COMPLEX BINDER
During building object operation they are subject to ac-
tion of carbon dioxide and gas from air. As a result of this
there may be a marked change in the nature of cemented new
formations of silicate stone, which is reflected in its operat
ing life. Depending on carbon dioxide gas concentration,
phase composition of new formations, degree of crystalliza
tion and moisture content of materials, carbonization pro
ceeds with a different degree of intensity and is accompanied
by a change in material strength.
Silicate materials with gel-forming cementing sub
stances, whose new formations are specified by considerable
specific surface and high chemical activity, react with carbon
dioxide gas more than crystalline materials. As our research
has shown, silicate stone based on CLGG-binder, has a
sub-microcrystalline structure with highly developed specific
surface of cementing substances. Therefore its carbonization
may proceed at a considerable rate, causing destructive
It may be suggested that with a certain combination of
production factors and treatment parameters for a developed
material it will be resistant to action of carbon dioxide gas. In
order to check this assumption a four-factor experiment was
planned and implemented. The variable production factors
adopted were content of cake, grinding powder, lime, gyp
sum, and steaming temperature.
In order to carry out research for each series of tests three
beam specimens were formed with a size of 4 ´ 4 ´ 16 cm.
Specimens were carbonized for 400 h at a carbon dioxide gas
pressure in a carbonizer of 0.01 MPa, moisture content
60 – 75%, and gas concentration 95%. After carbonizing
specimens were held under natural conditions for levelling
out moisture content and then shrinkage, ultimate strength in
compression and bending, and degree of carbonization were
determined. The last index is a percentage ratio of carbon
ized area of a cross section to total specimen area. The car
bonized part was determined by absence of a crimson color
at the surface of freshly cleaved specimens section with
treatment by phenolphthalein.
By analyzing the data obtained it is possible to note that
the most marked effect on properties of CLGG-binder
(cake-lime-grinding powder-gypsum-binder) after carbon
Refractories and Industrial Ceramics Vol. 57, No. 4, November, 2016
1083-4877/16/05704-0407 © 2016 Springer Science+Business Media New York
Parts 1 and 2 of the article published in Novye Ogneupory No. 4
(2016); part 3 — No. 5 (2016); part 4 — No. 6 (2016).
FGBOU VO NIU Moscow State Civil Engineering University,