The global production of concrete amounts to a total of 12 billion m3/year. Out of this total, approximately 50 million m3 of concrete is never actually used and is returned to the production plant. Considering just 10% of this total as “critical”, meaning not recyclable while fresh, this translates into 5 million m3 of returned concrete requirement treatment every year. Returned concrete has a high environmental impact on concrete plants and leads to extra operating costs.
Current systems for treating returned concrete do not offer a sustainable solution in that they:
Have a negative impact on the environment
Do not make the best use of potentially recyclable material
Increase overall operating costs
Re-con Zero from Mapei is a solution to these problems, making the most of returned concrete by transforming it into granular material that can be reused as aggregate in concrete giving environmental advantages:
With Re-con Zero, returned concrete may be completely re-utlised, thus reducing the amount of waste material to be disposed of.
With Re-con Zero, the number of recycled material employed increases, thus reducing the impact caused by the extraction and processing of virgin materials
With Re-con Zero, the amount of materials transported by road decreases, due to the fact that part of the aggregates is produced at concrete plants.
Surface curing compounds from Mapei India
Curing is the process of controlling the rate and extent of moisture loss from concrete during cement hydration. It may be either after it has been placed in position (or during the manufacture of concrete products), thereby providing time for the hydration of the cement to occur. Since the hydration of cement does take time – days, and even weeks rather than hours – curing must be undertaken for a reasonable period of time if the concrete is to achieve its potential strength and durability. Curing may also encompass the control of temperature since this affects the rate at which cement hydrates. The curing period may depend on the properties required of the concrete, the purpose for which it is to be used, and the ambient conditions, i.e., the temperature and relative humidity of the surrounding atmosphere. Curing is designed primarily to keep the concrete moist, by preventing the loss of moisture from the concrete during the period in which it is gaining strength. Curing may be applied in a number of ways and the most appropriate means of curing may be dictated by the site or the construction method.
Mapei India has a range of curing compounds in its product range:
Mapecure E30 and Mapecure E30 White – Surface film curing compound in water emulsion to protect the surface of concrete against rapid evaporation of the mixing water
Mapecure E40 – High performance, surface film curing compound in water emulsion to protect the surface of concrete against rapid evaporation of the mixing water.
Mapecure E50 White – High performance, surface film curing compound which may be painted over, to protect the surface of concrete against rapid evaporation of the mixing water
Mapecure AS – Surface film curing compound in water acrylic emulsion to protect the surface of the concrete against rapid evaporation of the mixing water
Mapecure ASW – Surface film curing compound in water acrylic emulsion with white pigment to protect the surface of concrete against rapid evaporation of the mixing water.
Mapecure SRA25 – Curing admixture with the ability to reduce hydraulic shrinkage and formation of micro-cracks.
For further details:
Mapei Construction Products India Pvt. Ltd.
#402, Tudor Court, 40, Lavelle Road
Bangalore 560 001
Ph.: 080 22221820 / 22221840