A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Panneau 3D au béton de sable
Abstract This paper presents test results of mechanical properties of sprayed sand concrete [BS] by wet-mix process on 3D panel, as a substitution to ordinary dry-mix shotcrete [BO (3/8)] made of aggregates up to 8 mm. The experimental investigations show that the mechanical properties and the kinetics of drying shrinkage of the two concretes are similar. However, the drying shrinkage amplitude of BS is more important. The results illustrate that the rebound is inherently higher in the dry-mix process used for BO (3/8) than that of the wet-mix used for BS (15% vs. 30%.). In addition to the above performance, the rebound of BS has a good homogeneity and may be reused, but under certain conditions in low loading structures. Manuel Olivares Santiago (Remarques autour du rebond d’un béton projeté—Ciment, Bétons, Plâtres, Chaux, No 795-2/92) and EVG-GRAZ (Austria) (Manuel du système de construction EVG avec éléments tridimensionnels, volume 1-EVG GRAZ (AUSTRIA). Pehiem, avril 1998) authorize the reused of the rebound of an ordinary concrete in the dry mix, despite a composition deeply different from the initial material. The investigation of dry-mix shotcrete without accelerator, including less than 25 percent of rebound shows that the 28-day compressive strength is higher than the shotcrete without addition of rebound (Remarques autour du rebond d’un béton projeté—Ciment, Bétons, Plâtres, Chaux, No 795-2/92). Nevertheless, more investigation taking into account hydration is necessary. On the other hand, the rebound of BO (3/8) is made of coarse aggregates with less cement paste, which makes it difficult to be reused owing to its heterogeneity. Furthermore, BS has a good appearance unlike the BO (3/8), which needs additional finishing efforts to adjust the surface. Another significant advantage is that the obtained homogeneous layers may reach 8 cm of thickness unlike the BO (3/8) where the thickness could not exceed 3 cm. The latter small value is due to the difficulty that the successive layers have to stick on each other for the mix design used. This former leads to more rigid panels with improved performance.
Panneau 3D au béton de sable
Abstract This paper presents test results of mechanical properties of sprayed sand concrete [BS] by wet-mix process on 3D panel, as a substitution to ordinary dry-mix shotcrete [BO (3/8)] made of aggregates up to 8 mm. The experimental investigations show that the mechanical properties and the kinetics of drying shrinkage of the two concretes are similar. However, the drying shrinkage amplitude of BS is more important. The results illustrate that the rebound is inherently higher in the dry-mix process used for BO (3/8) than that of the wet-mix used for BS (15% vs. 30%.). In addition to the above performance, the rebound of BS has a good homogeneity and may be reused, but under certain conditions in low loading structures. Manuel Olivares Santiago (Remarques autour du rebond d’un béton projeté—Ciment, Bétons, Plâtres, Chaux, No 795-2/92) and EVG-GRAZ (Austria) (Manuel du système de construction EVG avec éléments tridimensionnels, volume 1-EVG GRAZ (AUSTRIA). Pehiem, avril 1998) authorize the reused of the rebound of an ordinary concrete in the dry mix, despite a composition deeply different from the initial material. The investigation of dry-mix shotcrete without accelerator, including less than 25 percent of rebound shows that the 28-day compressive strength is higher than the shotcrete without addition of rebound (Remarques autour du rebond d’un béton projeté—Ciment, Bétons, Plâtres, Chaux, No 795-2/92). Nevertheless, more investigation taking into account hydration is necessary. On the other hand, the rebound of BO (3/8) is made of coarse aggregates with less cement paste, which makes it difficult to be reused owing to its heterogeneity. Furthermore, BS has a good appearance unlike the BO (3/8), which needs additional finishing efforts to adjust the surface. Another significant advantage is that the obtained homogeneous layers may reach 8 cm of thickness unlike the BO (3/8) where the thickness could not exceed 3 cm. The latter small value is due to the difficulty that the successive layers have to stick on each other for the mix design used. This former leads to more rigid panels with improved performance.
Panneau 3D au béton de sable
Benaissa, A. (author) / Kamen, A. (author) / Chouicha, K. (author) / Malab, S. (author)
2007
Article (Journal)
English
| Online Contents | 2007
| Springer Verlag | 2007
| British Library Online Contents | 2008
| Online Contents | 2008