Journal article
Quartz-powder free UHPC with limestone-powder or basalt-powder



Publication Details
Authors:
Wetzel, A.; Piotrowski, S.; Reinhardt, L.; Middendorf, B.
Publisher:
ERNST & SOHN
Publication year:
2018
Journal:
Beton- und Stahlbetonbau / Concrete and Reinforced Concrete Structures
Pages range:
608-613
Volume number:
113
Issue number:
8
Start page:
608
End page:
613
Number of pages:
6
ISSN:
0005-9900

Abstract
In Germany ultra-high performance concrete is currently being used especially in the field of precast concrete elements. The special properties resulting from a low water/binder ratio of approx. 0.2 and the use of high-performance superplasticizers and fine particles to increase the packing density. In addition to the use of the reactive silica powder as the finest component, the use of quartz powder is also crucial for the optimum packing density and thus beneath other effects crucial for the particularly high durability and high compressive strength. Since quartz powder is respirable and proven to be carcinogenic, alternatives are urgently sought. Based on an existing UHPC-mix the quartz powder was substituted by limestone-and basalt powder in this study. After the optimization of the fresh concrete properties, the hardened concrete was characterized. The criteria of a UHPC can be met with limestone and basalt powder. In the case of basalt powder further advantages result for the mechanical properties.

Last updated on 2019-14-05 at 09:19

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