This paper presents a practical approach for designing, erecting, and testing stone columns using the vibro-replacement method to improve soil bearing capacity under shallow foundations (isolated and raft foundations) for any typical building under small or medium loading conditions. Usually, the vibroreplacement method is used in soils with cohesive layers of mixed deposits, loose sand, or bot...

In this study, the usability of limestone extracted from two different aggregate quarries located in Çankırı province as concrete was investigated. For purpose, samples were taken and on taken, sieve analysis, specific gravity, water absorption, bulk density, very fine material content, flakiness index, methylene blue, disintegration strength, abrasion resistance, freeze-thaw, alkali-silica rea...

This paper deals with the possibility of using Schmidt hardness test, which does not require much preliminary preparation and is easy to perform, in production commercial blocks a quarry. Previous recommendations for testing rock materials were specifically related tests performed geomechanical purposes. They also referred mostly smaller samples, but has some special features, mainly because th...

The Auckland aggregate market is estimated to be 7.2 million tonnes a year. Sixteen major quarries supply this market. Because of the number of suppliers and the variety of products, planning in this complex environment is difficult. Winstone Aggregates is the largest producer of rock products in Auckland. It owns nine quarries and supplies slightly more then half of the region's aggregate need...

With globally more than 100,000 km2 impacted by surface mining at present, and with increasing demand for surface-mined products, land managers are challenged to address landscape degradation of decommissioned quarries, especially in urban areas. In this study, soil, microclimate, vegetation community data were collected from geomorphologically distinct locations (quarry floor, platform pond, q...

A fast, quantitative image analysis technique was developed to assess potential rock weathering by bacteria. The technique is based on reduction in the surface area of rock particles and counting the relative increase in the number of small particles in ground rock slurries. This was done by recording changes in ground rock samples with an electronic image analyzing process. The slurries were p...

Originally described from limited exposures in central Noble County, Ohio, the Noble Limestone Member (Congemaugh Group, Pennsylvanian) has recently been discovered at three additional localities in northern Noble County and eastern Guernsey County. The Noble Limestone Member overlies the fresh-water Ewing Limestone Member and occurs beneath the Rock Riffle Run Limestone Member, at a position a...

ONE PROBLEM of recent interest in the theory of mathematical ecology is the attempt to describe the effect of the spatiotemporal structure of a heterogeneous environment on the growth and diffusion of a population. Most single-species models that have been analysed in the literature (cf. [5,6]) have a constant diffusion coefficient and a constant carrying capacity of the environment. However, e...

Iodine is an essential micronutrient for human health. Its deficiency causes a number of functional and developmental abnormalities such as goitre. The limestone region of Derbyshire, UK was goitre-endemic until it declined from the 1930s and the reason for this has escaped a conclusive explanation. The present study investigates the cause(s) of goitre in the UK-Peak District area through an as...