pozzolanas

Natural pozzolanas react quickly and well with lime.

Chapter 7 1998

Natural pozzolanas react quickly and well with lime.

Chapter 7 1998

In producing blended cements, almost all types of common pozzolanas can be used.

3. Innovative technologies related to the increased utilization of low-energy building materials 1995

The blending of certain carbonaceous materials such as granulated slag, fly-ash and other pozzolanas with cement makes it possible to produce more cement from the same amount of clinker and, thus, reduce the final consumption of energy per ton of cement produced.

2. Energy efficiency in the production of high-energy content building materials 1995

Artificial pozzolanas are produced from a number of industrial and agricultural wastes which are highly siliceous.

3. Innovative technologies related to the increased utilization of low-energy building materials 1995

Blended cements are either produced directly in cement plants (e.g. by mixing certain types of pozzolanas with cement clinkers and grinding them together) or they can be produced on site by mixing ordinary Portland cement (OPC) with finely ground pozzolanas.

3. Innovative technologies related to the increased utilization of low-energy building materials 1995

As in the case of natural pozzolanas, the artificial pozzolanas are processed and mixed either with lime or cement to be used as binding material in low-cost construction or soil stabilization.

3. Innovative technologies related to the increased utilization of low-energy building materials 1995

Even though processing pozzolanas and producing them in a usable form, to be mixed with lime or cement, requires some energy, experiment and extensive research work have shown that the sum of energy used in this process is less than the energy used in the substituted cement or lime.

3. Innovative technologies related to the increased utilization of low-energy building materials 1995

However, among the different types of pozzolanas, furnace slag has been widely used in the process of producing blended cement, which is very popular in both developed and developing countries and for which relevant standards have already been established.

3. Innovative technologies related to the increased utilization of low-energy building materials 1995

The replacement percentages of pozzolanas vary from 15 to 50 per cent resulting in an energy saving of up to 40 percent.

3. Innovative technologies related to the increased utilization of low-energy building materials 1995