Durability of self-consolidating concrete containing natural waste perlite powders

Abstract

Perlite is a natural glassy volcanic rock used in construction applications requiring improved lightweight, thermal, and acoustic properties. During processing of raw perlite (i.e., cutting and fractioning to different sizes), large amounts of powders are collected and stored as waste materials. This paper evaluates the effect of waste perlite (WP) powders on durability and long-term transport properties of self-consolidating concrete (SCC). Different mixtures prepared with 580 kg/m 3 powder using various combinations of WP, limestone filler (LF), metakaolin (MK), and silica fume (SF) are tested over 2-years period. Test results showed that WP confers particular benefits to the SCC compressive strength and its evolution over time, particularly when used in combination with MK and SF. Water permeability, carbonation, and chloride ion migration curtailed when WP concentration reached 220 and 260 kg/m 3 . In contrast, the resistance against freeze/thaw remarkably improved, given the pozzolanic reactions and porous nature of such powders that accommodated the disruptive expansive stresses resulting from frost attack.

Performances of vermiculite and perlite based thermal insulation lightweight concretes

“…Lightweight geopolymer concretes with fly ash, pumice and perlite produced compressive strengths up to 10-50 MPa as their unit weights changed between 1250 and 1700 kg/m 3 [29]. Thermal conductivity and the over-all durability of concretes were substantially improved with the use of perlite [30][31][32].…”

Optimization of CWP-Slag Blended Geopolymer Concrete using Taguchi Method

“…The incorporation of powder wastes characterized with silicate and/or aluminate compounds have shown promising results during the manufacture of mortar/concrete. Fly ash, metakaolin, ground granulated blast furnace slag (or simply slag), ladle slag, expanded perlite, and ceramic waste powder (CWP) are considered as by-product wastes that could partially or completely replace Portland cement to achieve concrete with adequate strength properties and durability [1][2][3][4][5][6][7][8][9]. Such practice combines the advantages of enhancing the performance of concrete while mitigating its ecological footprint [10].…”

Durability Behavior of Mortars Containing Perlite Tailings: Alkali–Silicate Reaction Viewpoint

“…Perlite is a natural vitreous volcanic rock that, when heated to around 900-1200 • C, expands 5 to 20 times its original volume [1], making it suitable for various applications in the most diverse industries, such as construction, paint industries, pharmaceuticals, soil and water filtration, and the plastics industry [2][3][4][5]. However, during the processing of raw pearlite (i.e., cutting, crushing, grinding, and particle size classification), a large volume of tailings is generated, with particle sizes ranging from microns to about 0.5 mm [6]. In this processing process, two types of waste are generated: the coarse perlite (CP) tailings from the crushing stages and the fine tailings (PP) from the grinding and granulometric classification stages.…”