**Author details**

corresponds to control mortar, when the mortars are attacked by sulfuric acid H2SO4, they react with the Portlandite Ca(OH)2 resulting from the hydration of the cement [15], which causes the of gypsum. The process is described by the following

The low percentage of alumina Al2O3 in marble waste sand decreases the formation of C3A, which reacts with gypsum to produce ettringite (Eq. 4), that is why the increase in marble waste sand percentage decreases the weight loss of mortars.

3CaSO4 þ 3CaO*:*Al2O3*:*6H2O þ 26H2O ! 3CaO*:* Al2O3*:* 3CaSO4*:*32H2O (4)

After the comparative study between mortars based on natural sand and marble

• The optimal density is observed for the mortar based on 15% of marble waste sand, due to the actual density and the water retention by the grains of marble

• The best consistency is given by the mortars based on 15% of marble waste

• The mortar with 15% marble waste sand registers the low volume of air

• Compressive and flexural strength, in all ages, of mortars based on marble waste sand are better than those of mortars based on natural sand. The mortar

• The absorption of water of mortars containing marble waste sand is high compared to that of the control mortar. This is caused by the large volume

• The mortars with the marble waste sand approved a greater shrinkage than that of the control mortar, following the evaporation of the free water existing

• Concerning acid attack, and in HCl solution, the mortar with marble waste sand had a bad resistance to aggression due the high amount of CaCO3 in marble. On the other hand, marble sand enhances resistance to H2SO4.

In light of the analysis, the conclusion of this study is that the introduction of marble waste sand was beneficial to some properties and durability of mortars.

sand, the presence of fines promotes the slump of the mortars.

content, which is explained by a better compactness.

with 20% of marble waste sand is the most effective.

proportion of the capillary pores.

in the test specimens.

**46**

waste sand, we can draw the following conclusions:

*Sandy Materials in Civil Engineering - Usage and Management*

CaðOHÞ2 þ H2SO4 ! CaSO4*:*2H2O (3)

chemical reaction:

**6. Conclusions**

waste.

Hebhoub Houria<sup>1</sup> \*, Kherraf Leila<sup>1</sup> , Abdelouahed Assia<sup>1</sup> and Belachia Mouloud<sup>2</sup>

1 Department of Civil Engineering, LMGHU Laboratory, University of Skikda, Algeria

2 Department of Civil Engineering and Hydraulic, LMGHU Laboratory, University of Guelma, Algeria

\*Address all correspondence to: hebhoubhouria@yahoo.fr

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
