By Ravindra K. Dhir, John G. L. Munday
Advances in Concrete Slab know-how records the court cases of the overseas convention on Concrete Slabs held at Dundee collage on April 3-6, 1979. This e-book discusses the impact of metal fiber-reinforcement at the shear energy 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 ground slabs in shear wall constructions; shrinkage and cracking of concrete at early a while; and slab building for HAB process modules also are elaborated. this article likewise covers the direct completing of concrete slabs utilizing the early age strength grinding process; program of vacuum dewatering to in-situ slab construction; 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 curious about the practices and study on the subject of slab know-how.
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Extra info for Advances in Concrete Slab Technology. Proceedings of the International Conference on Concrete Slabs Held at Dundee University, 3–6 April 1979
114, Berlin (1954). C. Teychenne. Proc. First Int. Cong, on Lightweight Concrete, l_, 23-37, London (1968). A. Muriin and C. Wilson. J. Am. Concr. , 49 (9), 21-45 (1952). W. M. C. Turna. J. Am Concr. N. B. Ibrahim. Proc. Inst. Civ. , 56, 635-646 (1973). N. B. L. Anand. Mater. , 8_, 413-423 (1975). EFFECT OF REPEATED DOSAGES OF SUPERPLASTICIZERS ON WORKABILITY, STRENGTH AND DURABILITY OF CONCRETE V. M. Malhotra Head, Construction Materials Section, Canada Centre for Mineral and Energy Technology, Canada ABSTRACT This paper gives results of a laboratory investigation to determine the effect of repeated dosages of superplasticizers on workability, strength and durability of concrete.
Speed of application through guniting process. In one tunnelling application increases of the order of six times were reported when guniting replaced traditional timber lagging and hard pack techniques. Thinner steel fibre sections following more closely the rock profile reduce material waste. Predictable, non-catastrophic mode of failure offering important safety advantages. Improved strata control through early sealing of exposed rock. Competitive costs demonstrated in numerous applications. Concrete pipes.
It is well established that the presence of fibres in concrete increases its tensile strength, ductility and crack control characteristics (1). The most unique property of the fibre reinforcement is its capacity to reduce the stress concentrations at the tips of flexural as well as shear cracks and thereby to slow down the propagation of such cracks. Fibre reinforcement can therefore be successfully used to increase the first crack strength and improve the serviceability characteristics of structural members in flexure (2).