Reusing ceramic wastes in concrete

Using ceramic sanitary ware waste as concrete aggregate

Recycled powder (RP) is the main by-product in the reclamation of construction and demolition (CD in addition, improvement methods and a benefit evaluation of RP concrete are further introduced. Based on statistical data that describe the activity index of RP and the compressive strength of RP concrete, the median diameter and replacement ratio of RP in concrete preparation should be below 30 μm and 30%, respectively. The use of RP improves the durability of concrete when the RP fineness is superior to the cement fineness. Increasing the RP fineness is an effective approach to improving the properties of RP concrete, and a CO2-curing treatment of RCP is an eco-friendly modification method. Furthermore, the use of RP in concrete has good economic and environmental benefits. Therefore, one expects that this review helps the further use of RP in concrete.

The utilization of eco-friendly recycled powder from concrete and brick waste in new concrete: A critical review

Utilization of recycled brick powder as alternative filler in asphalt mixture

A study of the mechanical properties of ground ceramic powder concrete incorporating nano-SiO2 particles

Use of waste brick as a partial replacement of cement in mortar.

The properties of moisture diffusion parameters and their effect on the tensile mechanical behavior of a fabric composite (glass fiber/epoxy resin) in the warp and weft directions were investigated. The water up take by specimens conditioned in a humid environment under different relative humidities (0, 60, and 96% RH) at a constant temperature of 60°C was evaluated by weight gain measurements. The water absorption followed Fick’s diffusion law in the fabric composite. A comparison between the values obtained for the moisture diffusion coefficient and the equilibrium moisture content at the laboratory and those given by Loos and Springer showed that the parameters depended not only on the nature of materials, but also on environmental conditions. The effect of moisture absorption on tensile characteristics of the composite, which was tested in uniaxial tension in the warp and weft directions at constant imposed displacement rates up to failure, showed a significant reduction in the ultimate tensile strength of the specimens conditioned at 96% RH.

An analysis of moisture diffusion according to Fick's law and the tensile mechanical behavior of a glass-fabric-reinforced composite

The moisture diffusion and mechanical response in shear of a laminate constituted of 12 layers of glass fabric fiber/epoxy resin were evaluated. The experimental analysis of the moisture absorption of the specimens conditioned at different relative humidities, 0, 60, and 96% RH at 60°C was to determine the two parameters characteristic of the Fick diffusion law (the diffusion coefficient D and the maximum quantity of water of saturation M
 m
 ) which admits the reversibility of the phenomenon. The analysis of the mechanical response in shear of the specimens oriented at 45° tested in uniaxial tension at constant imposed displacement rates, has permitted to show that the influence of the moisture concentration for the composite is very important at 96% RH. The proposed simple model makes it possible to specify the influence of water absorption on the mechanical behavior in shear.

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Modeling of the mechanical behavior of composite at different relative humidities

This work presents an experimental study realized at the materials laboratory of the University of M’sila. It consists to vary the percentage of the pozzolanic admixture (waste bricks) in cement by the substitution method (partial replacement of the clinker by the calcined clay). The characteristics of cement at anhydrous state and the hydrated state (chemical composition, specific weight and fineness, consistency of the cement paste, setting times and shrinkage) were studied thus that the mechanical behavior (flexural and compressive strengths) for the mortar was determined. According to the experimental results obtained, it comes that the quantity of pozzolanic admixture (calcined clay) and the chemical composition of cement manufactured are the principal parameters that influence on the variation of the mechanical strengths (flexural and compressive) of the mortars tested.

Effects of Pozzolanic Admixture (Waste Bricks) on Mechanical Response of Mortar

This experimental study investigates the effect of using binary natural fine aggregates (dune sand and crushed sand) on mortar. This method is utilized to modify the particle size distribution of various sands used in mortar. For this investigation, two sands were used: a dune sand (DS) and crushed sand (CS) at different proportions in mortar. The effect of the quality and grain size distribution of natural fine aggregates (DS ad CS) on the physical properties of binary sand confected (apparent or bulk density, absolute or gravity density, porosity, fineness modulus, particle size distribution and water absorption). The properties of fresh and hardened mortar were also analysed. The results obtained showed that the mechanical strength of mortar depends on the nature and particle size distribution of sand studied. This study shows the potential of this method to make mortar with binary sand (dune and crushed fine aggregates) in order to improve the physical properties of sand. The increase in the quantity of mixing water generated by addition of quarry waste was modified by the addition of a superplasticizer or water reducing admixture (Medaflow 30) what led to the improvement of the physical and mechanical properties of the mortar. The inclusion of crushed sand (CS) at replacement levels of 40 % to 50% resulted in a increase in the mechanical strength of the mortar. However, the improved performance was observed when quarry waste as fine aggregate was used in presence of chemical admixture (1% of Medaflow 30).

A. Naceri

Papers

Use of waste brick as a partial replacement of cement in mortar.

An analysis of moisture diffusion according to Fick's law and the tensile mechanical behavior of a glass-fabric-reinforced composite

Modeling of the mechanical behavior of composite at different relative humidities

Effects of Pozzolanic Admixture (Waste Bricks) on Mechanical Response of Mortar

Physico-mechanical properties of mortar made with binary natural fine aggregates (dune sand and crushed sand) with and without chemical admixture