Concrete consists of cement, sand, gravel and water. And usually that's all you need to produce it. But in reality, functional additives can make the often challenging production much easier, in order to ensure that the desired results are achieved accurately. This all serves to either reduce complaints or to increase the profit margin potential of the concrete - in summary: "added value".
The so-called efflorescence is free lime, which settles on the surface as calcium carbonate CaCO3, many times causing discussions and creating complaints and headache to the producer. There is an effective remedy by adding a special water-repelling admixture HYDROMIX®-Fluid 50. The principle is quite easy: If no water penetrates the concrete, no calcium can be transported to the surface through humidity evaporation, the trigger to start the CaCo3 formation on the surface. For example coloured concrete paving stones are a standard field of application for the HYDROMIX®-Fluid 50 admixture.
It is not easy to keep track and not get confused with all the different concrete additives, with new products and names popping up almost daily. And every now and then you hear industry experts saying that the future of concrete is self-compacting concrete, only self-compacting concrete. Right or wrong? We don't know, but meanwhile you may keep up with the times with ARCON-Fluid+plus, a plasticizer based on PCE-technology. Good for both: true self-compacting concrete and semi-self-compacting if you want to reduce, but not eliminate vibration.
HEBAU-Tip: ARCON-Fluid+plus has a quite high content of active ingredients. So try it with a low dosage rate first. And you don't need to change your mix design to make it work, which is good to avoid changing the "look" of your architectural concrete.
Shrinkage cracks on the surface of concrete or cementitious screed may occur when the fresh concrete/screed surface is creating so-called plastic shrinkage stress in the first hours of hydration, at a time when the early strength is still too low to compensate this deformation. Here special fibres are useful to bridge the time until the concrete itself is strong enough. The fibres also increase the flexile strength and have a long-term positive effect, especially on wearand abrasion resistance.
left: TECHNOFIBER®- reinforced concrete
right: concrete without fibres