## 1 Introduction  
Considering that cement screeds is frequently installed in floor constructions exposed to heavy traffic, such as floors in industrial and commercial buildings, highway warehouses, stations, hospital halls, and similar structures, it is subjected to significant loads, including concentrated loads. Acting over relatively small areas, these loads generate high local pressure responsible for damage and defects in the screed [1]. There is often a need for the repair and rehabilitation of floor constructions, with damages manifesting over time, sometimes immediately after construction. Technical specifications for cement screeds typically focus on basic data, but the need for additional information on characteristics and proper material selection is underscored. Poorly executed cement screeds can lead to high reconstruction costs and losses due to the cessation of activities during rehabilitation, pointing to structural defects in the lower zones of screeds [2]. Numerous engineers and researchers have explored cement screeds and their diverse properties. For example, the thermal properties of recycled glass claddings and their significance for the energy efficiency of a building were studied by [PERSON] and others [3]. [PERSON] and colleagues investigated improved thermal and acoustic performances of cement claddings, exploring the possibility of reducing their weight by adding cork granules obtained as waste during production [4]. The use of waste materials as constituents of screeds was also examined by [PERSON] and others, who assessed the impact of recycled concrete as an aggregate, derived from fine fractions, in cement claddings [5]. Using electrofilter ash in concrete screeds is becoming a common practice. This situation entails both environmentally and economically positive effects [6]. Apart from the evident ecological and economic advantages, substituting a portion of cement with supplementary cementitious materials (SCMs) also provides engineering benefits, such as enhanced workability, decreased risk of segregation, and mitigation of shrinkage and cracking [7]. Since electrofilter ash has pozzolanic properties, whose activity is defined as the ability to produce materials with hydraulic properties in the presence of water and lime Ca(OH)\({}_{2}\), and relatively high grinding fineness, this powdered material can be used as a mineral additive in the production of cement, i.e., it may be a partial replacement for Portland cement in composite materials [8]. The partial replacement of Portland cement with SCMs, including fly ash, clays, ground granular blast-furnace slag, limestone filler, silica fume, and metakaolin, has garnered significant attention in recent years [9]. The construction industry is concerned about its impact on global warming, mainly due to carbon emissions (CO\({}_{2}\)) from activities like material production, construction, transportation, and waste generation. Portland cement (PC) production is a major source of CO\({}_{2}\), with 1 kg of PC generating approximately 0.8-0.9 kg of CO\({}_{2}\)[10]. Adding fibers to the cement-composite mix improves its strength and behavior by delaying the initiation of cracks and controlling their propagation. Commonly used fibers in the concrete mixture include steel fibers (SF), carbon fibers (CF), and polymer fibers (PF). Steel fibers are considered the most popular, as they can significantly increase the tensile and compressive strength of hardened concrete more than other types of fibers. Despite this, the use of polypropylene fibers has proven effective in enhancing the mechanical properties of hardened cement composite and is widely used in various applications [11]. While polypropylene is not a natural fiber, it can serve as an environmentally friendly option when sourced from recycling. Its integration into concrete not only facilitates plastic recycling and reuse but also improves the performance of the cement-based composite.