NTCC 2017: Long-Term Observation of the Resistance of Novel Hybrid Cement Exposed to Sulphate Solution

This work is aimed to investigate four-years impact of 5 % sodium sulphate solution on the mortar made of novel hybrid cement H-CEMENT, being prepared with maximal content of wastes and by-products and only 20 % wt. of Portland cement clinker, compared to that prepared with the reference CEM I 42.5 N (PC). H-CEMENT for its specific material composition does not meet the criteria for inclusion in the cement kinds reported in EN 197-1 but complies with all of the hygienic regulations and standards imposed on similar building materials.

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Influence of supplementary cementitious materials on hydration and microstructure development of concrete

Proceedings International ◽

10.33263/proceedings11.00430044 ◽

2019 ◽

Vol 1 (1) ◽

pp. 43-44

Keyword(s):

Fly Ash ◽

Portland Cement ◽

Cementitious Materials ◽

Supplementary Cementitious Materials ◽

Cement Clinker ◽

Hydration Kinetics ◽

Supplementary Cementitious Material ◽

Industrial Manufacturing ◽

Portland Cement Clinker ◽

By Products

Several supplementary cementitious materials (SCM) were blended with Portland cement clinker in order to produce more sustainable binders. The use of such materials, where no additional clinkering process is involved, leads to a significant reduction in CO2 emissions per ton of cementitious materials (grinding, mixing and transport of concrete and use very little energy compared to the clinkering process) and is a means to (re)utilize by-products of industrial manufacturing processes. Fly ash, for example, is the most commonly used supplementary cementitious material. The blending of Portland cement with fly ash results in the reduction of the total amount of portlandite in the hydrated mixture [1-4], somewhat less pronounced than for silica fume as: the reactivity of fly ash is very limited and as the CaO in the fly ash is an additional source of calcium [5]. Since fly ash particles are more spherical in shape than cement particles, workability and pumpability can be improved, by adding fly ash, also, fly ashes can cause low early strengthening. In this paper, the effects of Fly-ash as SCM’s on microstructure and hydration kinetics are studied.

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Investigation of fly ash properties with purpose of its utilization as a secondary raw material for portland cement clinker production

Hemijska industrija ◽

10.2298/hemind0610245b ◽

2006 ◽

Vol 60 (9-10) ◽

pp. 245-252 ◽

Cited By ~ 2

Author(s):

Zvezdana Bascarevic ◽

Miroslav Komljenovic ◽

Ljiljana Petrasinovic-Stojkanovic ◽

Natasa Jovanovic ◽

Aleksandra Rosic ◽

...

Keyword(s):

Fly Ash ◽

Portland Cement ◽

Power Plants ◽

Building Materials ◽

Thermal Power ◽

Cement Industry ◽

Raw Material ◽

Cement Clinker ◽

Physical Chemical ◽

Portland Cement Clinker

In this paper the results of the investigated properties of fly ash from four thermal power plants in Serbia are presented. The physical, chemical, mineralogical and thermal characterization of fly ash was carried out, in order to determine the possibility to utilize this material in the building materials industry, foremost in the cement industry. It was determined that, although there are differences concerning the physical, chemical, and mineralogical characteristics of the investigated samples, they are very similar concerning their thermal characteristics. It was concluded that using fly ash as one of the raw components in the mixture for Portland cement clinker synthesis, not only enables the substitution of natural resources, but it might have a positive effect on the lowering of the sintering temperature.

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