Due to the large amount of binder and low water-cement ratio, high-performance cement composites have high compressive strength and a dense hardened cement paste microstructure. External curing is insufficient, as it cannot reach the interior parts of the structure, which allows autogenous shrinkage to occur in the inside. Lack of prevention of autogenous shrinkage and high restraint causes structural microcracks around rigid components (aggregate, rebars). Consequently, this phenomenon leads to the propagation of internal microcracks to the surface and reduced concrete durability. One way to minimize autogenous shrinkage is internal curing. The use of soaked lightweight aggregate to minimize the risk of cracking is not always sufficient. Sorption and desorption kinetics of fine and coarse fly ash aggregate were tested and evaluated. The correlation between the development of linear autogenous shrinkage and the tensile stresses in the restrained ring test is assessed in this paper. A series of linear specimens, with cross-section and length custom designed to match the geometry of the concrete ring, were tested and analyzed. Determination of the maximum tensile stresses caused by the restrained autogenous shrinkage in the restrained ring test, together with the approximation of the tensile strength development of the cement composites were used to evaluate the cracking risk development versus time. The high-performance concretes and mortars produced with mineral aggregates and lightweight aggregates soaked with water were tested. The use of soaked granulated fly ash coarse lightweight aggregate in cementitious composites minimized both the autogenous shrinkage and cracking risk.

In his introduction to the German translation of Norwid's Vade-mecum Hans Robert Jauss calls the work of the Polish poet a lasting challenge to German poetry. This essay attempts to show the ways in which Norwid’s further reception could help re-evaluate German assessments of their own Romantic tradition. For instance, the ironic undermining of the value of work, both creative and physical, in Norwid’s ‘Irony’ can be used as a tell-tale clue for the pursuit of similar intima-tions in the writings of early German Romantics, especially the barely noticed ironic undertones of their representations of labour economics. Furthermore, the adoption of the newly-developed concept of a political and economic Romanticism for the critical study of Norwid leads to the discovery of an unexpected theoretical coherence of his oeuvre, which in effect (let it be made absolutely clear) loses nothing of its heterogeneity and dialogic nature. The irony generated by the habitus of Norwid’s crypto-parabases (a technique which is a distinctive feature of his dramas) reveals the productive role of time in this mode of poetic representation, the time of work and the time of great projects, and conjure up the jeering specter of eternity.