Influence of Polypropylene, Glass and Steel Fiber on the Thermal Properties of Concrete

Abstract

The variety of approaches to tackle climate change reflects the size of this global problem. No technology will act as a panacea to cure the greenhouse gas emissions problem, but new building materials with byproducts or even wastes have the potential to play a major role in reducing the environmental impacts of the building sector. In this study, three potential solutions of concrete with dispersed reinforcement in the form of recycled fibers (polypropylene, glass and steel) were examined. The aim is to present a detailed analysis of the thermal properties of new building materials in an experimental approach. Concrete mixtures were prepared according to a new, laboratory-calculated recipe containing granite aggregate, a polycarboxylate-based deflocculant, Portland cement (52.5 MPa) and fibers. This experimental work involved three different contents of each fiber (0.5%, 0.75% and 1.0 wt.%), and all tests were carried after the complete curing cycle of concrete (28 days).

Effect of Metal Lathe Waste Addition on the Mechanical and Thermal Properties of Concrete

“…With the addition of 5%, 10% and 15% of lathe waste, an increase in specific heat by 10.4%, 14.8% and 23.0% respectively was obtained compared to the base sample. The obtained correlation is similar to concrete with steel fibers [14]. Analogously to other mechanical properties, it can be observed that the slope of the obtained curve for correlation between splitting tensile strength and lathe waste content is very similar to relationships determined by other scientists [21,53], especially to the results obtained by Purohit et al [21] (Figure 12).…”

“…With the addition of 5%, 10% and 15% of lathe waste, an increase in specific heat by 10.4%, 14.8% and 23.0% respectively was obtained compared to the base sample. The obtained correlation is similar to concrete with steel fibers [14].…”

“…The widespread use of steel products in the industry results in energy consumption [ 5 ], CO 2 emission [ 6 , 7 ] and production of steel waste in various amounts and sizes [ 8 , 9 , 10 , 11 ]. Some steel waste is recycled [ 12 , 13 , 14 ]. Metal chips are generated during the cutting, milling and turning process as a side effect of manufacturing elements with specific geometric dimensions and surface finish [ 15 , 16 ].…”

Effect Steel Fibre Content on the Load-Carrying Capacity of Fibre-Reinforced Concrete Expansion Anchor

“…In recent years, many studies concerning new generations of concretes have been published, including high-performance concrete (HPC), self-compacting concrete (SCC), eco-efficient concrete, and even self-healing concrete [1][2][3]. One of the most interesting and widely used is fibre-reinforced concretes fibre [4][5][6], including recycled fibre [7][8][9]. The fibre-reinforced concretes are characterised by superior resistance to crack propagation and cracking itself (by fibre bridging on a crack), impact, and fatigue, having good durability at the same time [10].…”

Morphology and Chemical Purity of Water Suspension of Graphene Oxide FLAKES Aged for 14 Months in Ambient Conditions. A Preliminary Study

“…This state of affairs opens up new opportunities for tuning properties of resulting graphene-based materials by varying their oxidation degree. Having this in mind, we presume that studying aging-related alterations of graphene derivatives can be of great interest for practical purposes, as materials’ properties and performances are some of the most important issues regarding different types of commercially available products [ 30 , 31 , 32 ]. The primary motivation upon which this study relies is to check whether or not storage time alters the morphology and ionic conductivity of graphene oxide flakes.…”