نتایج جستجو برای: schmidt hammer hardness

تعداد نتایج: 36985  

Journal: :Journal of science and medicine in sport 2012
Dara M Twomey Peta E White Caroline F Finch

OBJECTIVES To establish if there is an association between ground hardness and injury risk in junior cricket. DESIGN Nested case-series of players who played matches on specific grounds with objective ground hardness measures, within a prospective cohort study of junior community club cricket players. METHODS Monitoring of injuries and playing exposure occurred during 434 matches over the 2...

2012
Gregory J. Retallack

Despite evidence that weathering plays a role in forming intertidal, estuarine, and fluvial rock platforms, many publications uncritically refer to “wave-cut” or “stream-cut” rock platforms. The alternative explanations of chemical weathering and physical water erosion of rock platforms have been debated since 1839. Our new approach to this long-standing problem introduces data from fluvial as ...

2009
J. Brožovský

The paper presents evaluation of correlations for calculation of concrete compression strength using nondestructive testing parameters for both impact and ultrasonic pulse methods, as listed in EN 13791:2007. This standard indicates procedures relating to compression strength determination in construction and building elements. These procedures relate to compression strength evaluation based ei...

2014
Jiri Brozovsky

The paper deals with the application of combined nondestructive method for assessment of compressive strength of calcium silicate bricks. In this case, it is a combination of the rebound hammer method and ultrasonic pulse method. Calibration relationships for determining compressive strength of calcium silicate bricks obtained from nondestructive parameter testing for the combined method as wel...

1998
KEVIN WHITE NICK DRAKE

There are a number of techniques for estimating the amount of weathering a clast has undergone. These usually have the objective of establishing an ordinal chronology of geomorphological surfaces, or investigation of site-specific conditions affecting weathering rates. Three such techniques are applied to a dated sequence of alluvial fan segments in southern Tunisia. Two of these techniques dep...

Estimation of roadheader performance is one of the main topics in determining the economics of underground excavation projects. The poor performance estimation of roadheader scan leads to costly contractual claims. In this paper, the application of soft computing methods for data analysis called adaptive neuro-fuzzy inference system- subtractive clustering method (ANFIS-SCM) and artificial  neu...

Journal: :Jurnal deformasi 2023

Bendungan merupakan salah satu sarana multifungsi yang memiliki peranan penting bagi kehidupan manusia. Guna menjaga dan meningkatkan jaminan keamanan bendungan pengoperasiannya maka diperlukan pemeriksaan teliti (assesment) melalui penerapan metodologi test/pengujian memadai. Tujuan dari penelitian ini adalah mengetahui tingkat pelapukan kekuatan struktur beton concrete face spillway sejak din...

Journal: :Construction and Building Materials 2021

Theoretical approaches and code formulas assume the compressive strength of solid clay brickwork as a function bricks mortar. Such an approach is not so easy to be applied in practice since components may identified only by means indirect testing through rebound hammers or penetrometers. Since largely depends on brick properties, mortar playing minor role, low detailed fast estimate deduced fro...

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