Frequently Asked Questions
Frequently Asked Questions
Ready mix concrete is simply concrete that's specially made for delivery from a central plant to the client's construction site. Every batch of RMC is custom made based on the requirements of the contractor and is brought in a freshly mixed, plastic or unhardened condition usually by cylindrical trucks (cement mixers).
Apparent ready mixed concrete shortages are caused by:
1. Miscalculation of form volume or slab thickness when actual dimensions exceed the assumed dimensions by even a fraction.
2. Deflection or distortion of the form work.
3. Irregular subgrade & its settlement.
4. Smaller quantities wasted or used in incidental works for large pours.
To ensure sufficient supply of Geo mix concrete:
1. Measure formwork accurately & order sufficient quantity to finish the job.
2. For large pours, include an allowance of about 2% over planned dimensions to account for wastage & potential increased thicknesses.
3. Towards the end of large pours, carefully measure the remaining volume & confirm the closing quantity to the RMC supplier.
No. Masons ought to be restricted & transit mixer operators ought not to be forced to add water. Consequences of such actions could be severe. Properly designed ready mixed concrete contains optimum water. If the workability (slump) of ready mixed concrete is not as expected, the RMC supplier should be informed. If required, dosings of admixtures along with a small quantity of water would be done by the RMC supplier's technical personnel.
Geo mix concrete is supplied only after exhaustive laboratory & plant trials. To ensure consistent quality, incoming raw materials are regularly tested. Sampling & testing of ready mixed concrete is done everyday as codal stipulations. At Geo mix, buyers are invited to visit our laboratories to witness the process.
Depending on the workability, Geo mix concrete would be usable for up to 3 hours.
Ready-mix concrete is eco-friendly in a lot of ways. Concrete's ingredients (water, aggregate, and cement) are plentiful in supply and have a lesser impact on the environment in their extraction than other building materials. Quarries, the main source of raw materials, can be quickly reclaimed for residential, recreational and commercial use. They can also be refurbished to their natural condition. Plus, leftovers are readily reused or recycled.
International standards specify that RMC must be discharged from the transit mixer truck within 2 hours of the time of loading. It is also mandatory to make arrangements at site to ensure that full load of ready mixed concrete is discharged within 30 minutes of arrival on site.
No. The reason for this is that in Geo mix we have strong competition law, which makes it illegal for companies or Geo mix to get involved in any form of collusion on price or market share. Each member prices each project and quotes on it as the situation requires. It also depends on how big the job is, how busy the plant is, how eager the supplier is to get work, etc.
Try to minimise the manual handling of concrete by ensuring that the readymix truck is as close as possible to its final location. The less it is moved, the better.
Compaction ensures the optimum density of the mix is achieved, increasing compressive strength. Where reinforcing is used, the bond between concrete and redistribution bar is improved. Permeability of the concrete decreases, decreasing cold joint, honeycombing entrapped air and segregation.