## 1 Introduction
[15] verified the addition of agate \"rolled powder\" as a small aggregate in conventional concretes, and obtained good results against the compressive strength and the absorption of water by capillarity. [PERSON] et al. [16] evaluated the influence of the agate waste as a large aggregate in the compressive strength and cement consumption of concretes produced with different recycled aggregates. [PERSON] [17] evaluated agate residue in the average granulometry of sand (average diameter between 0.3 and 1.2 mm) for the production of white and conventional concrete. The results demonstrated that the use of this material as a substitute for natural sand showed deleterious reactions, known as alkali-aggregate  
Figure 1: (a) Rolled stone, (b) Ball bearing drum and (c) rolled powder. reactions (AAR). In this context, it is shown that the AAR was minimized by adding pozzolanic material as silica fume [11]. The study by [PERSON] [18] evaluated the possibility of replacing natural sand with agate residue in the production of stoneware tile, in the mass proportion of 15 to 45%. The agate powder was also used in the production of ceramics [19], in the development of urban pavement structures [20], as soil remineralizer [21], and in the production of colored sand through magnetite nanoparticle incorporation [22]. Many silica-based wastes have been evaluated to produce efficient cementitious materials such as: self-compacting concrete with waste marble dust [23]; concrete made with granite and marble as recycle aggregates [24]; concrete with high volumes of unprocessed lignite-coal fly ash and rice husk ash [25]; rice husk ash incorporated as a partial replacement for fine aggregate in concrete [26]; concrete produced from coal bottom ash [27]; waste brick as a partial replacement of cement in mortar [28]; concrete from alkali activated slag [29]; waste glass in autoclaved aerated concrete [30]; and, other uses. According to [PERSON] and [PERSON] [31], the concrete can present twenty-seven variations, one of which is lightweight concrete. One type of lightweight concrete is known as aerated concrete, which is normally used in the form of sealing blocks [32], and is divided into aerated foamed concrete blocks (AFCB) and autoclaved aerated concrete blocks (AACB), also known as autoclaved cell concrete blocks (ACCB). AACB in Brazil, is regulated by the Brazilian Association of Technical Standards NBR 13438 [32], and has a specific mass of 400 to 650 kg/m\({}^{3}\), after hardening. Though, there is no Brazilian standard for AFCB, but AFCB is internationally standardized. According to the American Society for Testing and Materials, C 495-99a [33; 34] the specific mass of Aerated Foamed Concrete (AFC) can range from 320 to 1920 kg/m\({}^{3}\). The internal structure of foamed concretes includes that of air-voids that form up to 80% of the volume of the material. These small air-voids must be homogeneously distributed within the mortar and are incorporated by adding preformed foam [33; 35]. Non-autoclaved lightweight concretes present less compressive strength and greater retraction due to the absence of a curing process when compared to autoclaved ones. This difference is explained by the reactions produced in the autoclave because the materials based on silicon oxide react with calcareous materials and form very well defined structures, known as tobermorite (hydrated calcium silicate--(Ca\({}_{5}\)Si\({}_{6}\)O\({}_{16}\)(OH)\({}_{2}\)-4H\({}_{2}\)O)) [36]. In the curing process in the natural environment, limestone materials initially have an acicular shape and over the first six months are converted into hexagonal calcite crystals [37]. In AFCB, the incorporation of air into the mortar is usually produced by adding preformed foam based on synthetic foam agents. More stable incorporators of air have been sought that reduce the effects of Ostwald ripening, which reduces the coalescence and drainage of the film that encapsulates the air-void. In addition, the study by [PERSON] et al.