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OPTIMUM PERCENTAGE OF VOLCANIC TUFF IN CONCRETE PRODUCTION

Pages: 43 – 50

Mohmd Sarireh

Abstract:

The Tafila area (Jabal Al Hala) is covered with volcanic tuff, which has been tested and studied for its possible use as a construction material in the production of ordinary concrete. The volcanic tuff material was used at 10, 20, 30, 40, and 50% mix proportion of the materials in the concrete mix.It was subsequently tested for density, compressive strength, and flexural strength. The density of volcanic concrete (VC) ranged from 2195 to 2297 kg/m3. At 20% of volcanic tuff or volcanic aggregate (VA), the density of VC was 2285 kg/m3 and 2310 kg/m3, the compressive strength was 17 MPa and 21 MPa, flexural strength was 5 MPa at the 7th and 28th days, respectively. The results showed that the volcanic tuff can be used in concrete production by replacing part of the aggregate (fine and coarse) by the VA, with the proportion of 20% of VA as the optimal value. The VA can be used for VC production where lower density is required for loading, and the VC shows a remarkable density and strength during the testing and construction at sites.

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