China
Africa
Explore chapters and articles related to this topic
Stabilization of rock slopes
Published in Duncan C. Wyllie, Christopher W. Mah, Rock Slope Engineering, 2017
Duncan C. Wyllie, Christopher W. Mah
Reinforcement. For permanent applications, shotcrete should be reinforced to reduce the risk of cracking and spalling. The two common methods of reinforcing are welded-wire mesh, or steel or polypropylene fibers. Welded-wire mesh is fabricated from light gauge (∼3.5 mm diameter) wire on 100 mm centers, and is attached to the rock face on about 1–2 m centers with steel pins, complete with washers and nuts, grouted into the rock face. The mesh must be close to the rock surface, and fully encased in shotcrete, taking care that there are no voids behind the mesh. On irregular surfaces it can be difficult to attach the mesh closely to the rock. In these circumstances, the mesh can be installed between two layers of shotcrete, with the first layer creating a smoother surface to which the mesh can be more readily attached.
Concrete Fundamentals for Rigid Pavements
Published in Rajib B. Mallick, Tahar El-Korchi, Pavement Engineering, 2017
Rajib B. Mallick, Tahar El-Korchi
Welded wire mesh is steel wire welded together to form a flat sheet with a square grid pattern. A common grid size is 150 × 150 mm (6 in. × 6 in.), and a common steel wire thickness is 4 mm (1/8 in.). Wire fabric or bar mats are used in PCC slabs to control temperature cracking. The stresses developed in the concrete slab during these volume changes are mainly due to friction that develops. However, these reinforcements do not increase the structural capacity of the slab. The wire fabric aids in holding the cracked concrete pavement together and allows for load transfer through aggregate interlock. Additionally, the reinforcement allows for greater spacing between joints.
Experimental and numerical investigation of strengthening of openings in masonry walls using steel bars and steel wire mesh
Published in European Journal of Environmental and Civil Engineering, 2022
Tarik El-Salakawy, Gehan Hamdy
Steel wire mesh: Galvanized steel welded wire mesh having 25 × 25 mm opening size is used, Figure 1(b), weight 630 kg/m3 (0.945 kg/m2), wire diameter 1.5 mm made of mild steel having yield stress (fy) 240 MPa, ultimate tensile strength fu 350 MPa and modulus of elasticity (Es) 200 GPa.