Mechanical Properties of Plain AAC Material

Fouad, F. H.; Dembowski, J.

doi:10.14359/14388

Cited by 2 publications

(1 citation statement)

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“…For this reason, a minimum compressive (and also tensile) strength should be guaranteed in order to prevent local compression crushing at the corners, as well as premature cracking of the wall [30]. Despite a large number of studies available in the literature on the mechanical characterization of AAC blocks, only a few of them [31][32][33][34][35][36] discuss the dependency of the mechanical properties from density by analyzing experimental results relative to the same production (i.e., referred to the same raw materials and autoclaving conditions, which are known to be the intrinsic factors with a stronger influence on AAC properties [37][38][39][40]). Most published works are referred to the characterization of a specific product (with a given density), and this makes it difficult to put the available data together to derive a general trend because of the different raw materials in the admixture and the different conditions followed for the thermal treatment.…”

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confidence: 99%

The Effect of Density on the Delicate Balance between Structural Requirements and Environmental Issues for AAC Blocks: An Experimental Investigation

Ferretti

Michelini

2021

Sustainability

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Among other construction materials, Autoclaved Aerated Concrete (AAC) offers several advantages to face the pressing need to build more sustainable and energy-efficient buildings. From the building side, the low thermal conductivity of AAC allows the realization of energy-efficient building envelopes, with interesting savings in terms of heating and cooling processes. The equilibrium between structural performances (related to safety issues) and energy efficiency requirements is, however, very delicate since it is strictly related to the search for an “optimum” material density. Within this context, this work discusses the results of wide experimental research, showing the dependency of the most important mechanical properties (compressive strength, elastic modulus, flexural strength and fracture energy) from density, as well as the corresponding variation in thermal conductivity. In order to identify the better compromise solution, a sort of eco-mechanical index is also defined. The big challenge for future researches will be the improvement of this eco-mechanical index by working on pore structure and pore distribution within the material without significantly reducing the density and/or by improving the strength of the skeleton material.

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