An Experimental Study of Mortars with Recycled Ceramic Aggregates. Deduction and Prediction of the Stress-Strain

Abstract

The difficult current environmental situation, caused by construction industry residues containing ceramic materials could be improved by using these materials as recycled aggregates in mortars, with their processing causing a reduction in their use in landfill, contributing to recycling and also minimizing the consumption of virgin materials. Although some research is currently being carried out into recycled mortars, little is known about their stress-strain (σ-ε); therefore this work will provide the experimental results obtained from recycled mortars with recycled ceramic aggregates (with contents of 0, 10, 20, 30, 50 and 100%), such as: the density, the compression strength, as well as the σ-ε curves representative of their behavior. The values obtained from the analysis process of the results are those of: σ (elastic ranges and failure maximum), ε (elastic ranges and failure maximum), and Resilience and Toughness; in order to finally obtain, through numerical analysis, the equations to predict their behavior (related to their recycled content). At the end of the investigation it is established that mortars with recycled ceramic aggregate contents of up to 20% could be assimilated just like mortars with the usual aggregates, and the prediction equations produced could be used in cases of similar applications.

Influence of Demolition Waste Fine Particles on the Properties of Recycled Aggregate Masonry Mortar

“…The water absorption capacity of all the recycled aggregates proved to be greater than that of the natural aggregate (Table 1), a fact which has also been reported by other researchers [13,[17][18][19]22,26,[42][43][44]. With respect to recycled aggregates, those obtained from crushing the fine and coarse fraction of CDW1 achieved the highest and lowest absorption capacity, respectively.…”

“…Most of the mortar mixes manufactured with higher percentages of recycled aggregate presented lower mechanical properties than those of conventional mortar [13,14,16,17,19,20]. However, certain authors have established that there were minor influences on the properties of mortar mixes produced with a replacement ratio of up to 20% [21,22], 25% [19] or 40% [15] of recycled aggregate in substitution of natural aggregate. According to several researches [23][24][25][26] the improvements on the mortars'…”

Recycled Mortars with Ceramic Aggregates. Pore Network Transmutation and Its Relationship with Physical and Mechanical Properties

“…In Table 4 the results corresponding to the physical and mechanical properties of the CRM and UM studied, respectively, are shown. These results (open porosity and absorption [ 29 ]; density , fm , E and drying shrinkage [ 34 ]) were analyzed in previous works. The objective of the current work is to establish their relationship with porosity.…”

“…The standards used were the Spanish UNE (UNE-EN 1015-10 [ 32 ], UNE-EN 1936 [ 33 ], and ASTM standards, respectively. More details of the tests for these properties can be found in previous publications by the authors [ 29 , 34 ].…”

Plastic deformation of ZnO thin films through edge and screw dislocation movements

“…Studies on polycarbosilanederived SiC ceramic 25 and SiC/SiC composite 26,27 have shown that porosity decreases and mechanical properties improve with the increasing number of PIP cycles. Zhu et al 28 show that increasing pyrolysis temperature and the concentration of SiC fillers in polycarbosilane polymer result in improved mechanical properties in two-dimensional Carbon/ SiC (C/SiC) composites fabricated using the PIP process.…”