HEM FOR ARCHITECTURAL CONCRETE
Mortar with cement : sand : water
= 1 : 2 : 0.47 before the transformation.
The same mortar with the superplasticizer added. Bleeding is observed
here.
The same mortar transformed
with HEM
(the flow-on-glass test)
No bleeding is observed.
The flowability test is being done to a
regular mixture of the same formula.
To see the results of the flowability - strength tests CLICK HERE
This method is based on combining and optimally utilizing
mechanical energy and admixtures in the process of mixing cement, sand and
water using a high-energy mixer.
The preliminary grinding of the components is not provided for.
High-energy mixer
The prepared mixture can then be poured like plaster into molds of any shape, vibrated and left for curing without any signs of segregation or bleeding.
50-place mold for casting roof tiles
It's
replacing ceramic!
HEM results in a strong and durable material with the density of 2.1-2.3
g per cm3. The compressive strength is 4500 psi (with the
cement/sand ratio 1/3), and 7500 psi (with the cement/sand ratio 1/2).
The coloring admixtures are more
effectively used with HEM than in traditional mixing.
The cement - sand roof tile
facing tiles
HEM
results in higher durability in freezing-thawing and abrasion conditions. It is
recommended for casting paving stones.
To see
step by step
manufacturing
of
pavingstones
It can be used for houses and bridges, as well as for reproducing the fine art miniatures, like these. The liquid mixture is able to reproduce finest details of the molds.
The decorative tiles and plates featuring copies of cameos produced
in-home conditions
For more information about the decorative tiles
Expanded
HEM-mortar as a new kind of lightweight concrete
You may expand this mixture using the gas-forming admixture in order
to get the new kind of light-weight concrete with the density 1.0-1.4 g per cm3.
Properties of expanded HEM-mortar with cement-sand
ratio 1:2.
With the oven-dry density, kg per cu m. - 1000 (62.5 pcf), compressive
strength - 3 - 5 Mpa (435 - 725 psi).
With the oven-dry density 1400 kg/cu m (87.5 pcf), compressive strength - 13
Mpa (1830 psi).
Thermal conductivity 3.3 - 4.O mW/cm. K.
thus, HEM technology is proposed for casting architectural details of different kinds:
- tiles for roofing and facing of any shapes and color. instead of ceramic ones.
- porous blocks as the main material for walls possessing required thermal resistance and mechanical properties, instead of bricks, cellular concrete blocks, and lightweight concrete blocks with the aggregate of expanded clay, perlite or vermiculite.
- sculptures and architectural cast stone products of any dimensions for inside and outdoor use, instead of ones made of plaster, resins and marbles.
small sculptures made with 1 part of cement and 2 parts of sand.
Suggested technologies and materials are cheaper, do not pollute the environment, and require a minimum of energy in comparison with others using grinding, burning, and autoclaving. These technologies require only a special mixer and hermetic molds of steel, plastics or glass. Companies could develop the suggested method and technologies wherever sand and cement are available.
Since the above-mentioned method is not yet fully recognized in the United States the way it is recognized in Russia, my goal is to find a company that would be interested in doing research, and implementing the HEM technology.
To view the results of research done by Russian institutes
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