# Use of Eoofriendly Glass Powder Concrete in Construction of Wind Farms
## 1 Introduction
[20] stated that up to a substitution percentage of the aggregates by glass powder of 70% can be reached, provided that a particle size between 36 and 50 um is used. This showed that by reducing the particle size of glass powder, the pozzolanic properties of the binders manufactured increase. In addition, a greater long-term strength resistance of the pastes manufactured with this type of cement was obtained, due to the higher presence of C-S-H gels [19; 20]. Also, these gels have a self-repairing property when they are used in the stabilization of rolling track soils by prolonging their setting over time [21]. [PERSON] [22] reported that self-compacting concrete produced with 10% glass powder to replace cement had good properties when fresh. They indicated that workability decreased as the glass powder content of the concrete increased due to the geometry of the glass dust. In the same line, [PERSON] et al. [13] indicated that the sharper edge and the more angular shape of the glass powder (GP) particles reduced the fluidity of the cement mortars and concretes. [PERSON] and [PERSON] [23] reported pozzolanic activity when glass powder with a particle size of 13 um was used as a fractional replacement for cement in concrete. [PERSON] et al. [24] studied the properties of ground glass powder and reported that up to a certain percentage substituting ground glass for cement was a viable solution for fabrication in concrete. Studies carried out by [PERSON] et al. [25] have shown that at constant water-to-binder mass ratio, the addition of 20% of glass powder significantly reduced the chloride ion permeability of concrete, which was confirmed by [PERSON] et al. [21]. This property confers protective properties against corrosion to concretes made with glass powder and cement. [PERSON] et al. [23] observed an increase in compressive strength of 120% at the cure age from 3 to 90 days, when concrete was produced with ground glass powder with particle size up to 38 \(\upmu\)m.  
According to [PERSON] et al. [24], in the traditional concrete used in civil construction that is generally subjected to large changes in temperature, its durability is clearly affected, and in extreme cases can leave the concrete out of service. To avoid these consequences in traditional concretes, air-entraining additives are incorporated into the mix. In the case of concrete made with glass powder as a binder, the higher the percentage of substitution of glass powder for cement, the higher the air content, so it is not necessary to include additives. In 1935, [PERSON] gave a formula to predict the compressive strength of cement mortar, which expresses a linear relationship between the water-cement ratio and compressive strength. This expression indicates that compressive strength of cement-based materials is mainly dependent on the water-cement ratio among all the other factors. Therefore, it is seen as a mathematical form of water-cement ratio law. In this regard, based on [PERSON] studies [25], a calculation of theoretical compressive strengths at 28 and 90 days was reported using [PERSON]'s dosage, introducing a coefficient \(k\) that represented the replacement of cement CEM 152.5 R by glass powder. Considering all the above-mentioned points, our initial research hypothesis was that the glass powder used in this work, with its characteristics and particle size, will allow us to produce an ecofriendly concrete, whose mechanical properties will not be adequate to use it as a structural concrete, but it may be useful as a surface protection layer to avoid or reduce corrosion phenomenon. Therefore, the aim of this work consisted of studying the compressive strength of cements produced with different substitution percentages of a certain glass powder. A mathematical model has been proposed to fit the experimental compressive strength results. Also, [PERSON]'s formula was applied for simulation of the relationship between the water-cement ratio and 28- and 90-day compressive strength.