Browsing by Author "Perera, WSU"

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item: Thesis-Full-text
Development of fast and bouncy cricket pitches in Sri Lanka
Perera, WSU; Nawagamuwa, UP
Development of Fast and Bouncy cricket pitches in Sri Lanka Most cricket batsmen in Indian subcontinent face a great difficulty in batting against fast bowlers on English and Australian fast and bouncy cricket pitches. The lack of having such practice pitches in home is the main reason for their lack of performances in fast pitches. It had been discovered that the pace and bounce of a cricket pitch is governed by clay content, clay mineralogy, sand content, organic matter content and grass content of the top layer of a cricket pitch. Six local soils and one soil from India were tested for their index properties as the preliminary step. The soils which were fiilfilling the requirement of the soil properties of fast and bouncy cricket pitch material were selected along with the currently used soil for Sri Lankan cricket pitch preparation and used for the laboratory model studies. Six cubic samples for the frictic and bounce comparison were prepared inside the laborati y from selected three soils varying the swface grass content. The co-efficient of friction (\i value) and the co-efficient of restitution (e value) were determined by the bounce test and friction test respectively. Soils which had low value and high "e" value were selected as suitable soils for the further proceedings of the research. MU and TY along with MT (Mixture of both MU and TY) were selected to carry on further studies in an actual cricket pitches in order to check their ability to generate pace and bounce. Besides selected area of the cricket pitch was daily photographed and surface crack density was analysed using MATLAB software. MU was selected as the most suitable soil from among all tests soils and recommended to be used for the development of local fast and bouncy cricket pitches in Sri Lanka.
item: Conference-Full-text
Identification of local soils for development of cricket pitches
(Department of Civil Engineering, University of Moratuwa, 2015-10) Perera, WSU; Nawagamuwa, UP; Hettiarachchi, MTP
Most of the Cricket batsmen in Indian subcontinent face a great difficulty in batting against fast bowlers on English and Australian fast and bouncy wickets. The lack of having fast and bouncy pitches in Indian subcontinent has led to this problem. It had been discovered that the pace and bounce of a cricket pitch is governed by clay content, clay mineralogy and grass content of the cricket pitch. Local pitches were found to have high silt content, low clay content and low plasticity due to a difference in clay mineralogy. In this research “Grumusol” clay was discovered in Murunkan with a comparatively high clay content which is fulfilling most of the required clay properties of a fast and bouncy wicket. Typical Sri Lankan clay sample used to prepare wickets, Clay sample from Bangalore and the local “Grumusol” sample from Murunkan were tested for the clay properties. Results showed that “Grumusol” is most suitable for constructing a fast and bouncy wicket. Other than the clay as the basic material grass plays a vital role in binding the basic material together and maintaining the required moisture levels in the wicket preventing the wicket from fracturing during the game period. Here, Crouch grass was selected as the most suitable type of grass to achieve the desired output of the fast and bouncy wicket.
item: Conference-Abstract
Study on properties of locally available clays to be used in fast and bouncy cricket pitches
Perera, WSU; Nawagamuwa, UP; Wijerathna, HWN
Sri Lankan cricket batting line up faces a great difficulty in batting against fast bowlers in Australian “Fast” and “Bouncy” pitches. Lack of locally available fast and bouncy practicing pitches is the cause for this problem. It has been discovered that the pace and bounce of the cricket ball depends on clay mineralogy , clay and silt content, organic content, sand content and grass content of the top most clay layer in a cricket pitch. This research paper presents a comparison between results obtained through laboratory tests which were carried out in order to determine the particle size distribution, plastic characteristics, organic content, specific gravity and maximum dry density of these clayey soils. Clay sample from “Kotawehera” in Nikaweratiya region and three samples from Batticaloa, sample from a developing fast pitch in Bangalore and “Grumusol” clay from “Murunkan” in Mannar region were tested and compared with the currently used clay approved by Sri Lanka Cricket Association. Sample from Kotawehera and one sample from Batticaloa showed positive results of being a fast and bouncy pitch material by satisfying most of the criteria however, the “Grumusol” sample was highlighted from among all the other samples showing its highest potential to be used as a fast and bouncy cricket pitch material.
item: Conference-Full-text
Study on properties of locally available clays to be used in fast and bouncy cricket pitches
Perera, WSU; Nawagamuwa, UP; Wijerathna, HWN
Sri Lankan cricket batting line up faces a great difficulty in batting against fast bowlers in Australian “Fast” and “Bouncy” pitches. Lack of locally available fast and bouncy practicing pitches is the cause for this problem. It has been discovered that the pace and bounce of the cricket ball depends on clay mineralogy , clay and silt content, organic content, sand content and grass content of the top most clay layer in a cricket pitch. This research paper presents a comparison between results obtained through laboratory tests which were carried out in order to determine the particle size distribution, plastic characteristics, organic content, specific gravity and maximum dry density of these clayey soils. Clay sample from “Kotawehera” in Nikaweratiya region and three samples from Batticaloa, sample from a developing fast pitch in Bangalore and “Grumusol” clay from “Murunkan” in Mannar region were tested and compared with the currently used clay approved by Sri Lanka Cricket Association. Sample from Kotawehera and one sample from Batticaloa showed positive results of being a fast and bouncy pitch material by satisfying most of the criteria however, the “Grumusol” sample was highlighted from among all the other samples showing its highest potential to be used as a fast and bouncy cricket pitch material.