Optimum Percentage of Volcanic Tuff in Concrete Production

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/m 3 . At 20% of volcanic tuff or volcanic aggregate (VA), the density of VC was 2285 kg/m3 and 2310 kg/m 3 , the compressive strength was 17 MPa and 21 MPa, flexural strength was 5 MPa at the 7 th and 28 th 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.

Construction Method of Industrial College in Vocational Colleges Based on Cluster Analysis Algorithm

“…It is very necessary for students to adapt to industry standards in advance while cultivating professional knowledge [ 3 ]. This can not only improve the fit between the professional setting of vocational colleges and the industrial structure but also enable colleges to recognize the shortcomings of professional courses with the assistance of the industrial college, which plays a great role in promoting the professional setting of colleges and market research [ 4 ]. At present, most of the industrial colleges of vocational colleges in China are carried out in the way of school-enterprise cooperation, in which enterprises provide venues, equipment, and technology, and colleges provide teaching venues and teaching teacher management content.…”