Concrete is a semi-solid mix of binding materials and Aggregates where water plays a vital roll in the hydration reaction process.  Concrete is made semi-solid for easy moulding and after hardening it gives targeted compressive strength. 

2.00 Batching and Mixing

First step for mix is  the batching. In the previous days we performed batching by volume for hand mixer but in the recent day Batching plants or small modern mixer or self loading mixer are going to be available which helps to perform batching  99% (approximate) correct by weigh. 

For mixing, hand mixers is available but modern batching plants have strong mixers like PAN or TWIN SHAFT.

2.00 Batching and Mixing

First step for mix is  the batching. In the previous days we performed batching by volume for hand mixer but in the recent day Batching plants or small modern mixer or self loading mixer are going to be available which helps to perform batching  99% (approximate) correct by weigh. 

For mixing, hand mixers is available but modern batching plants have strong mixers like PAN or TWIN SHAFT.

2.10 Concept of Ready Mix Concrete

Concrete is a product which was mostly produced at the site by hand mixer but users can get it by order like other products from RMC company in fully ready conditions. The manufacturer will produce concrete at factory by batching plant, transport by transit mixer and shall pump it to the customer’s desired position by the concrete pump.  

2.20 Production process of Ready Mix Concrete

There is a short production flow in RMC plant.  Mostly all organ of plant brings all raw materials to the mixer after Batching.  Mixer does mixing and after a certain time it delivers mix to the Transit Mixer or pump or any kind of hopper. Transit mixer transport the mix to the site. For pumping, it discharges concrete to pump’s hopper.

3.00 Durability 

The structure is designed considering life more than 50 years. More durable concrete will give more life. Considering durability many caution or steps are executed during construction but it might be felt unnecessary. Senior Engineers are witness of such many construction mistakes. After 20 years when the structure is becoming abandoned that time experienced Engineer can comment on construction mistakes done. 

4.00 Modern Concrete 

• SSC- Self compacting concrete

• HPC - High performance Concrete, strength more than 40 Mpa

• Semi dry concrete- For production of block, pavers, uni pavers, kerbs etc. 

• Light weight concrete - Foam concrete, Auto clave concrete etc.

• Ferrocement - To produce concrete sheet for many other purposes, in Bangladesh roof top water tank but in freezing area it has versatile uses for insulating purposes.

5.00  Why Concrete Technology

To improvise the quality of concrete and for diversified use, technology is required. Now by  the concrete, 40-50 storey building can be constructed as the concrete can achieve even 100Mpa compressive strength. Low strength concrete takes more space in the ground for column, even project cannot be planned due to ow strength concrete. Now the less sized pier and column helps to plan project in congested  area also.