DRY MIX FOR OBTAINING FOAM CONCRETE
Abstract
Composition of a dry mix has been developed for production of non-autoclaved foam concrete with natural curing. The mix has been created on the basis of Portland cement, UFAPORE foaming agent, mineral additives (RSAM sulfoaluminate additive, MK-85 micro-silica and basalt fiber), plasticizing and accelerating “Citrate-T” additive and redispersible Vinnapas-8034 H powder. It has been established that foam concrete with density of 400–800 kg/m3, durability of 1,1–3,4 MPa, low water absorption (40–50 %), without shrinkable cracks has been formed while adding water of Water/Solid = 0.4–0.6 in the dry mix, subsequent mechanical swelling and curing of foam mass.
Introduction of the accelerating and plasticizing “Citrate-T” additive into composition of the dry mix leads to an increase of rheological properties in expanded foam mass and time reduction of its drying and curing. An investigation on microstructure of foam-concrete chipping surface carried out with the help of a scanning electron microscope has shown that the introduction of basalt fiber and redispersible Vinnapas-8034 H powder into the composition of the dry mix promotes formation of more finely-divided crystalline hydrates. Such approach makes it possible to change purposefully morphology of crystalline hydrates and gives the possibility to operate foam concrete structurization process.
About the Authors
S. N. Leonovich
Belarusian National Technical University
Belarus
Belarus
Professor, PhD in Engineering
D. V. Sviridov
Belarusian State University
Belarus
Professor, PhD in Chemistry
Belarus
Professor, PhD in Chemistry
G. L. Shchukin
Belarusian State University
Belarus
Associate Professor, PhD in Chemistry
Belarus
Associate Professor, PhD in Chemistry
P. I. Radyukevich
“Parade”, Closely-Held Stock Company, Minsk
Belarus
Belarus
A. L. Belanovich
Belarusian State University
Belarus
Associate Professor, PhD in Chemistry
Belarus
Associate Professor, PhD in Chemistry
V. P. Savenko
Belarusian State University
Belarus
Belarus
S. A. Karpushenkov
Belarusian State University
Belarus
Associate Professor, PhD in Chemistry
Belarus
Associate Professor, PhD in Chemistry
References
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Review
For citations:
Leonovich S.N., Sviridov D.V., Shchukin G.L., Radyukevich P.I., Belanovich A.L., Savenko V.P., Karpushenkov S.A. DRY MIX FOR OBTAINING FOAM CONCRETE. Science & Technique. 2015;(6):24-29. (In Russ.)
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