نتایج جستجو برای: limestone quarries
تعداد نتایج: 6283 فیلتر نتایج به سال:
Background and aim: the workers in Quarry and Stone Industries done frequently some duties including lifting and carrying of heavy loads and they are exposed to high risk of cumulative trauma disorders. The aim of this study was to comparing the prevalence of musculoskeletal disorders and risk of work postures in Quarry and Stone Industries workers. Material and methods: this cross-sectional a...
Despite reported synergies between alumina rich supplementary cementitious materials (SCMs) and limestone, previous studies have focused on up to 5% limestone content. Slag hydration in the presence of 10% limestone is reported in this paper. Hydration was followed through chemical shrinkage, calorimetry, thermal analysis, electron microscopy and X-ray powder diffraction. The results show that ...
Vipingo quarry in Kilifi county, Kenya, is one of the quarries supplying coral limestone for manufacturing coastal region. Due to its close proximity Indian ocean, semidiurnal ocean tides tend have an influence on stability slopes adjacent shoreline. Finite element numerical analysis using generalized Hoek–Brown criterion conducted assess condition followed by slope-angle optimization determine...
Abstract Construction and ornamental stones are important elements of cultural heritage geoheritage. The quarries, where these materials extracted, a type site that combines two types heritage. Both the character rock its place origin can be deeply rooted in local society. Red Ereño is red micritic limestone (Lower Cretaceous) with abundant white rudist fossil shells. This stone has been exploi...
This text is a dialogic conjunction of working practices developed in and around specific quarries, with Karin Reisinger tracing the material life-worlds iron ore Malmberget Petra Lilja limestone Limhamn, both Sweden. We walk think humans non-humans such as rocks, stones minerals through our respective pedagogies design architecture. Our take place extractive si...
The Texas Department of Transportation has experienced problems with inconsistent performance of the coarse aggregate fraction of hotmix asphalt pavements. This project was initiated to address problems associated with variations in hotmix coarse aggregate quality. More specifically, the researchers wanted to identify simple tests that can be performed at the aggregate quarries to assess the du...
There are many ancient underground quarries in Zhejiang Province, China. Many caverns of them maintained steady more than 1000 years. Certain engineering geological condition is very important for long-term stability. In this paper, ancient underground quarries in Shepan Island are presented as a case. Shepan Island ancient large-scale underground quarry caverns are located in Sanmen County, Zh...
This experiment was conducted to evaluate the effects of single or multi-particle size limestone on the egg shell quality, egg production, egg quality and feed intake in laying hens. A total of 280 laying hens (ISA brown) were used in this 10-wk trial. Laying hens were randomly assigned to 4 treatments with 14 replications per treatment and 5 adjacent cages as a replication (hens were caged ind...
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