Twittern

Study of micronized sand as a cement replacement

• Fig. 1. Particle size distribution of four...

• Fig. 2 M6, magnification 200x (left), and M600 at...

• Fig. 2. M6, magnification 200x (left), and M600 at...

• Fig. 3 Viscosity vs. replacement level (a) and...

• Fig. 3
  . Viscosity vs. replacement level (a) and...

• Fig. 4 Maximum packing density (calculated) versus...

• Fig. 4.
  Maximum packing density (calculated)...

• Fig. 5 Comparison of calculated contact area (left...

• Fig. 5.
  Comparison of calculated contact area...

• Fig. 6
  . ESEM images of the interface between...

• Fig. 6 ESEM images of the interface between...

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Due to the high level of CO₂ emissions and scarcity or raw materials involved in the production of cement, ways are being sought to reduce the amount of cement needed. In this paper, micronized sand is investigated as a cement replacement. The material properties are determined and the influence on the cement paste assessed through workability and strength measurements. It is found that workability decreases with increasing fineness and higher replacement levels.

The environmental impact of infrastructure projects is becoming an increasingly important issue in engineering design. There is a growing pressure from governments and owners/clients to realize infrastructure that meets the needs of today’s communities without compromising the needs of future generations. This means that, in the future, construction materials will be selected on the basis of the contribution they can make to meet sustainability requirements. Today, Portland cement is still the essential component of concrete. The CO₂emissions generated by cement production amount to more than...