The solid particle contamination is a challenge for the cement industries due to the highly dusty environment. The contaminants cause severe wear between moving surfaces and this in turn leads to rapid mechanical failure of the machine elements. The solid particle contaminants get into the lubricant among the metal surfaces due to the environmental conditions. The conditions get more severe in ...

In 1985, employees in the china clay industry were offered chest x ray examinations and 4478 (52.6% of the total workforce) accepted. Of these, 4167 workers and pensioners of the largest single employer also completed occupational histories, respiratory symptom questionnaires, and underwent ventilatory capacity tests. The x ray readings (read to the 1980 ILO classification) of the 4167 workers ...

in this work, the waste stone sludge obtained from the granite and marble stone processing factories was used for the manufacture of artificial stones using vibratory compaction in a vacuum environment. the results obtained showed that water absorption and density increased, and the flexure, compressive, and tensile strengths decreased with increase in the content of the waste stone sludge. the...

In general, the figurines belonging to the Neolithic (the New Stone Age) have rarely been under functional analysis. Nevertheless, three studies undertaken on the figurines unearthed from some places in the Middle East have presented some classifications for them, and attempted to study different results in terms of their application (Voight, M., 1983, pp.186-192). The first one is the publishe...

Graphics count among the oldest and newest forms of communication. Maps, for example, have been drawn in the sand or incised in stone or imprinted in clay for millennia. Maps now appear on PDAs or are downloaded from websites or are updated in car navigation systems. Ancient maps and modern ones, maps produced by professionals and those created by novices, by children and by adults, share many ...

Granite powder (stone powder), a waste product generated from stone quarries, is increasingly being reused in cement-treated clays. The particle size of powders affects the cement-clay reaction by either increasing or reducing unconfined compressive strength (UCS). This study investigated this phenomenon separating same batch at quarry into five sizes (A, B, C, D and E: 106–75 µm, 40–75 20–40 &...

Visible-near infrared (vis–NIR) spectroscopy has been widely used to characterize soil information from field global scales. Before applying a calibrated spectral predictive model acquire information, either independent validation or k-fold cross is evaluate performance. However, there no consensus on which strategy more suitable and robust when evaluating performance for the studies in differe...

PT Cipta Kridatama (CK) site Multi Harapan Utama (MHU) merupakan perusahaan kontraktor jasa pertambangan yang menerapkan metode peledakan pada aktifitas pengupasan lapisan overburden. Kegiatan geometri air deck bertujuan untuk menghemat penggunaan bahan peledak sehingga nilai powder factor juga turun. Serta mempercepat proses kegiatan tanpa menunggu waktu gassing dengan tetap menghasilkan fragm...

The article discusses traditions of constructing hydraulic structures on difficult terrain since ancient times. Features the landscape and socioeconomic conditions territory Tajikistan have led to development engineering here over centuries from simplest local building materials – stone, tree, clay. Despite primitiveness culture, masters past could arrange large irrigation that allow transporti...