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MELLOSE non-dispersible Underwater
Concrete Admixture
The Need
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Many under-water civil engineering
structures are affected not only by the presence of water or salt but also by water
pressure, flow of water, and by the different material's density. These factors could
cause cracks, corrosion, and dispersion of concrete particles.
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Using MELLOSE in under-water concrete structures.
Concrete particles without MELLOSE (water pictured as
black dots)
Concrete particles adding MELLOSE under water (water
pictured as black dots)
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| The Technology
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Mellose is a viscose agent based on under water Cellulose (Hydroxy Propyl Methyl
Cellulose). It is commonly referred to as a a self-leveling agent that increases viscosity
when is dissolved in water. It can be also described as an anti-washout concrete or
non-dispersible concrete mixture. Mellose is an essential component of high performance
concrete construction under water. In
under-water construction the concrete particles can be either separated or lost because of
water pressure, water flows or different densities. When Mellose is added, it
prevents the loss of cement in the mortar and the separation of the concrete particles due
to its increased viscosity. It combines first with the water than with the cement and the
other concrete particles. |
The Benefits
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Mellose increases the viscosity of suspended
concrete but decreases the viscosity of flowing concrete. Therefore, it increases the
workability of the concrete, while there is no separation of its aggregates. It prevents
the segregation of aggregates as well as the bleeding when used for under water
construction. The product comes in the form of a powder that is added as a concrete
admixture. |
Status
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The product has been successfully applied by
several Korean construction contractors like, Hyundai Construction and Dong-A Construction
for the construction of the main tower in the Kwang-an Great Bridge in Korea. |
Barriers
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Mellose can not be used with Naphtalene
Sulphonate because of chemical reactions. |
Points of Contact
- MELFLOW product: MECA Engineering Co., LTD. 3rd Kum-Ho
Bldg., 123-25 Karak-Dong, Songpa-Ku, Seoul, Korea (138-160). Phone: (+82-2) 443-3497. Fax:
(+82-2) 431-2570. Email: limstone@netsgo.com
References
- MECA Engineering Co., LTD. MEL-Series Catalog Information.
Disclaimer Statement
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Neither the Construction
Industry Institute nor Purdue University in any way endorses this
technology or represents
that the information presented can be relied upon without further investigation. |
LHM
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