System for efflorescence free and salt water resistant concrete components
Maleki-SlagSil is the result of 4 years of research and development work on a new concrete formulation. The result of the investigations carried out on pavers, precast concrete parts and pavement slabs is a unique formulation of the concrete with outstanding properties:
- No efflorescences on paving stones or concrete parts
- Durable salt water resistance
- Higher freeze/thaw/salt resistance
- Higher compressive strength
- Previous stackability (for paving stones)
- Increase in early strength
- Permanently improved acid resistance
- Environmentally friendly use of raw materials
What is Maleki-SlagSil?
Maleki-SlagSil is a stoichometrically adapted concrete formulation. When using extra-adapted GGBS and our liquid silicate Maleki-DW 100, it is possible to replace cement and at the same time to achieve some interesting advantages that have not been possible until now. In this formulation, cement particles in the concrete are replaced 1:1 by GGBS.
The remuneration of mortars or concrete with GGBS or other secondary raw materials, however, requires the most exact adjustment to the particular application in order to achieve an optimum result. Metallic sand is a latent hydraulic raw material, which reacts very slowly and thus takes more time to develop its compressive strength than Portland cement. With the stoichiometrically adapted combination of cottage sand and our liquid silicatic activating agent Maleki-DW 100, even a higher compressive strength is achieved and the product additionally has the above-mentioned advantages. Maleki-DW 100 is added with the mixing water to the concrete mixture.
Maleki-SlagSil as an important ingredient in mortars and concrete to ensure lasting protection.
Cement-based materials such as concrete have the strength-giving calcium silicate hydrates (CSH) and Ca(OH)2 (portlandite) after curing or hydration. While portlandite plays an important role in reinforcing the reinforcement of reinforced concrete, it is also responsible for unwanted concrete corrosion. Acids can dissolve Ca(OH)2 to form salts which appear as efflorescences on the surface. The most efficient protection of the materials described is the conversion of concentrated calcium ions into stable calcium silicate hydrate phases, which are permanently resistant to pollutants. The transformation of the molecular structure is achieved by a specially coordinated binder system. The proportion of portlandite in the end product is effectively reduced to a minimum and the resistance to various corrosive influences is significantly increased. This effect could be demonstrated by means of X-ray analysis in cooperation with external testing laboratories.