UHPC Navy Concrete - Ferrocement


The technique of using fine wire mesh as a 
reinforcement for concrete (ferroconcrete) 
structures is already very old. This 
technique has been used above all in the 
manufacture of boat and ship hulls, simple 
construction elements and in the design 
sector.

Today, less so-called chicken wire mesh is 
used and more plastic and ceramic mesh is 
used, which exceeds the tensile strengths 
of steel several times over.

With UHPC (Ultra High Performance 
Concrete) Navy binder it is also possible to 
use very fine aggregates, which in turn make 
it possible to use very fine meshes. Modern 
high quality UHPC Navy materials are a 
multiple times superior to standard concrete 
in all technical values.


UHPC has been used in the offshore industry 
for more than 25 years as a construction 
material and as a corrosion protection material 
under the harshest environmental conditions. 
In many areas, UHPC is superior to steel and 
replaces it there.

UHPC Navy offers the professional navy 
architect, boatbuilder and shipyard a more 
than interesting alternative to steel, plastic 
and wooden constructions.
Production methods such as casting and 
spraying and the rapid development of 
strength can save enormous costs.


This new development also makes it possible 
to manufacture boats or ships in series. 
Special hulls are possible. UHPC designs for 
floating windmill systems are in production today.


 
Statement on Ferrocement Statement on UHPC Navy
  Ferrocement = Steel reinforcement plus
  mortar concrete
  Small dia high tensil steel rods sandwiched
  between layers of wire mesh (chicken mesh)
  UHPC Navy = Steel, cermic fiber or plastic fiber
  reinforcement plus
  Ultra High Performance Concrete
  Extreme high tensil strength ceramic or glasfibre
  mesh and ceramic rods
  The shell structure of mortar and steel would
  be sufficiently impermeable, strong and
  impact resistant and with the right degree of
  flexibility
  The shell structure of UHPC Navy and
  reinforcement would be high sufficiently
  impermeable, extreme strong, very high impact
  resistant and with a extreme high flexibility.
  Ferrocement boats are produced in Britain,
  Canada, South Africa, Hong Kong and USA
  Hong Kong, Singapore, United Arabs Emirates
  Ferrocement hulls do not rot, nor do such
  marine animals as bores and tered worm
  have any effect on the mortar
  UHPC Navy hulls are absolutly sea water resistant, absolutly restinstant      against marine animals high dense structure and extreme high corrosions resistant
  Ferrocement hulls are stronger than hull 
  build in wood or glassfibre
  UHPC Navy hulls are much stronger than hulls in wood or glassfibre
  A partical characteristic of ferrocement,
  unlike others, is that if gains strength with
  age rather than loose it.
  UHPC Navy already reaches more than 70% of final strength after 48 hours and gain strength with age.
  Ferrocement
  Tensil strength 37 MPa
  Compressive Strength 83 MPa
  UHPC Navy Tensil strength 52 MPa+ or 755 psi (depends on reinforcement system)
  Compressive strength 140 MPa+ or 2300 psi
  (depends on reinforcement)      
  Ferrocement is high temperature resistant   UHPC Navy is very high temperature resistant. In a special high temperature resistant version UHPC Navy it temperature resistant up to 1200°C or 2192°F
 Ferrocement has a very low thermal
 conductivity
  UHPC Navy has a low thermal conductivity in
  combination. With special insulation aggregates
  UHPC will have a extreme low thermal conductivity
  Absence of maintenance cost for the hull   UHPC Navy hulls are maintenace free
  A problem would be the difficulty of
  achieving complete penetration of mortar
  through the mesh matrix
  UHPC Navy mortar, spray and castable products are selfcompacting. The penedration through the mesh is nearly to 100%
  Portland cement, Slag cement   UHPC Navy Binder
  Water/cement ratio 0,35   Water/ cement below 0,25
  Aggregate: Sand which pass 3/16 in sive   Aggregate: 0 – 3 mm Quarzsand or insulation
  material in the same grain size or desert sand
  Mixing ratio cement : aggregates 1:2   Mixing ration UHPC Navy binder : aggregates 1:1
  Density 2400   Density 2400
  Admixtures: for improve workability,
  durability, acclerate or retard setting and
  hardening
  Such admixtures are only introduced in
  minute qualities to produce the desired
  effect, therefor the degree of control must be
  very high.
  Admixtures are not necessary for UHPC Navy
  Recommended mixer is that which has a
  paddle attached to the inside of the drum to
  keep the mortar mixing evenly.
  The mixer is often referred to as a plaster´s
  mixer
  Pan pot mixer or shaft mixer
  Min. boat size approx. 18 ft   Not known
  Hull skin thickness 3/4 in   Hull skin thickness max. 3/4 in
  Salary rates for mortar work very high   Labor costs much lower, installation as shotcrete, casting and mortar possible. UHPC Navy material is self-compacting.
  No serial production possible   Series production easily possible
 
 
 
 
 
 
WPE DK International

Phone: 0049 176 601 73146
E-mail: info@wpe-dk.dk
Homepage: www.wpe-dk.com





1 comment:

  1. Bonjour, je suis sur le bord du grand et majestueux fleuve Congo (Côté de la République du Congo) non loin de la ville de Brazzaville... Je veux construire des bateaux catamaran en ferrociment + bambou + bois et des maisons flottantes catamaran en ferrociment + bambou et bois aussi avec isolation en polyuréthane et pour la propulsion : Moteur électrique + batterie + petite éolienne + solaire + hydrolienne, c'est a dire de l'énergie alternative...

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