By Ravindra K. Dhir, John G. L. Munday
Advances in Concrete Slab know-how records the court cases of the foreign convention on Concrete Slabs held at Dundee college on April 3-6, 1979. This ebook discusses the impact of metal fiber-reinforcement at the shear power of slab-column connections; sulfur-treated concrete slabs; yield line research of orthotropicaly bolstered external panels of flat slab flooring; and behaviour of flat slab/edge column joints. The layout of a number of panel flat slab constructions; structural habit of flooring slabs in shear wall structures; shrinkage and cracking of concrete at early a while; and slab building for HAB procedure modules also are elaborated. this article likewise covers the direct completing of concrete slabs utilizing the early age strength grinding method; software of vacuum dewatering to in-situ slab creation; retexturing of concrete slabs; and fatigue resistance of composite precast and in situ concrete flooring. This booklet is an efficient reference for college students and participants taken with the practices and learn when it comes to slab know-how.
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Additional resources for Advances in Concrete Slab Technology. Proceedings of the International Conference on Concrete Slabs Held at Dundee University, 3–6 April 1979
5 kN) are those based on CP110 (12). The load-deflection curves show that the presence of fibre reinforcement causes substantial reductions in the centre deflections. 2 per cent (slab S4). The increase in the service loads of the fibre concrete slab connections, taking the deflection at the service load of the plain concrete connection SI as the criterion of serviceability, is given in Table 1. 5 kN is the ultimate design load of slab connection SI based on CP110, both slabs S3 and S4 will have service loads higher than the ultimate design load of the plain concrete slab connection.
The steel and concrete strains were all very small in the elastic stage of loading until the first crack appeared, then they increased steadily and then rapidly, as yielding approached. Yielding of the tension reinforcement near the centre occurred for all the slabs at about three-quarters of the corresponding maximum load. The steel strains in the compression reinforcement were initially compressive and gradually changed into tension with further increase in load. Similar phenomena in the change of concrete strains at the compression face have been observed in reinforced concrete beams failing in shear, and the load at which the strain changes from compression to tension is indicative of the load at which diagonal tension cracking occurs within the slab.
CONCLUSIONS This paper shows the great potential of lightweight aggregate concrete for a wide range of structural applications in reinforced and prestressed concrete. The mixes, the data of which are presented here, have been used for short and longterm structural testing. Limitations of space preclude any reference to structural behaviour of these concretes and these will be reported elsewhere. It is shown that with a cement content of 450 kg/m 3, strengths of 40 to 50 N/mm 2 could be obtained at 5 days and strengths of 55 to 65 N/mm 2 at 28 days with and without steel fibre inclusions.