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Specific Chemical Admixtures for the Production of Hollow-Core Slabs

BASF Construction Chemicals Italia S.p.A., Treviso, Italy / Nordimpianti S.R.L., Chieti, Italy


In the production of prestressed hollow-core slabs, along with the nature of the raw materials and the composition of the concrete, the machinery, be it an extruder or a slipformer, also plays a fundamental role. The difficulty of simulating in the laboratory the way the concrete is compacted by these machines, and therefore the lack of specific methods to develop and evaluate chemical products, help explain the limited use of high-performance chemical admixtures among hollow-core slabs manufacturers. This work highlights how the close collaboration between machine builders and admixture manufacturers helps develop specific chemicals for this application. These products, tested in the laboratory using the methods presented, then introduced into the plant, lead to improvements both in production efficiency and in the performance characteristics – not just the mechanical ones - of the concrete slabs.

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Master Builder Solutions
by BASF Construction Chemicals
Treviso, Italy
Nicoletta Zeminian

Nordimpianti System SRL
Gian Piero Gagliardi
Via Erasmo Piaggio, 19/A, Zona Industriale Chieti Scalo
66100 Chieti (CH), Italy
T +39 0871 540222, F +39 0871 562408
info@nordimpianti.com, www.nordimpianti.com

CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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