Beautoklavis akytas betonas. Monografija - Remonto Gidas

A. Laukaitis, M. Sinica
NON-AUTOCLAVED POROUS CONCRETE
AND IT'S COMPOSITE PRODUCTS
SUMMARY
Technologies of production and properties of non-autoclaved
porous concrete, properties of composite products with nonautoclaved
porous concrete, their technologies of production and
questions about the usage of new products are analysed in this monograph.
The authors of this monograph represent development methods of
foams' properties because higher requirements are enhanced for nonautoclaved
porous concrete: fine-grained sand is used (or it's not used
at all) for production of non-autoclaved poruos concrete, therefore
foams have to support fresh formed mixture till the attainment of
binders' hydratation and proper plastic strength.
Frothing agents „Estand 1“ and „Centripor SK-120“ are
suitablest for these aims and fine-grained wastes of poruos concrete
are selected as the mineralizator of foam.
Mineral and organic fibrous additives are used to enlarge the
strenght characteristics of non-autoclaved foam cement concrete. It is
fixed that these additives do not have any influence to the macrostructure
of foam cement concrete and to the strength, however these additives
enlarge the flexion strength of specimens for 1,1–2,4 times
and tensile strength for 1,3–4,7 times. Square shape crosssection fibres
of polypropylene („Fiber“ sheaf) are effectivest.
It is shown that composite non-autoclaved specimens which matrix
is foam cement concrete and insertions are non-grained sand or
sheaves, values of desiccation deformations depend on the
density of material, type and amount of insertions, relative humidity
meteor.
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