تلتزم الشركة دائمًا بمعدات سحق التعدين ومعدات صنع الرمل ومعدات الطحن الصناعية، وتوفير حلول عالية الجودة للرمل والحصى ومجموعات كاملة من المعدات للمشاريع الهندسية واسعة النطاق مثل الطرق السريعة والسكك الحديدية والمياه والكهرباء، إلخ. ، وتسعى جاهدة لممارسة التصنيع الدقيق المحلي والتخطيط العلمي العالمي، مع اعتبار آسيا المنطقة النائية والعملاء المشعين حول العالم. بعد أكثر من 30 عامًا من التطوير، نجحت العديد من منتجات الشركة في اجتياز العديد من شهادات الجودة الدولية مثل الشهادة الدولية ISO9001:2015، وشهادة الاتحاد الأوروبي CE، وشهادة GOST الروسية. بعد ذلك، في السعي لتحقيق التميز، سنستمر في استخدام منتجات عالية الجودة والتكنولوجيا الاحترافية والخدمات المخلصة لمساعدة العملاء على خلق قيمة أكبر، واستخدام الإجراءات العملية لمواصلة تعزيز البناء البيئي للحضارة الإنسانية.
·After 28 days of curing cylinder specimens are tested to determine the compressive strength of concrete The compressive strength of cylinder specimens after 28 days of curing are determined 0 Flexural Strength After 28 days of curing prism specimens are tested to determine the compressive strength of concrete The compressive strength
·The study has conducted to determine the workability and compressive strength of the self compacting concrete The sand has replaced with quarry dust with the proportion of 10 20 30 and 40% and super plasticizer was added % The experiments were carried out at the Infrastructure University Kuala Lumpur IUKL concrete laboratory Slump flow J Ring
·steps In this work the fresh and compressive strength properties of concrete when the Natural sand is partially replaced with stone dust Keywords Concrete sand Quarry dust compressive strength Natural sand I INTRODUCTION GENERAL For the development of any structure Concrete is the main material
·By exchanging some of the sand in concrete for quarry dust compressive strength can be measured for a range of percentages and grades of the material Researchers Shyam Prakash K and Hanumantha Rao C 2017 While producing concrete cubes Fly Ash is used at replacement levels of 0% 5% 10% 15% 20% and 25% by weight of cement In
·Based on the findings of the compressive strength at all ages of the concrete mixtures the optimum levels of substitution of cement and sand were 10% of Al dross and 20% of quarry dust It was observed that there was a steady decline in compressive strength with an increment in the Al dross percentage above 10%
·[13] A Sumathi et al studied fly ash bricks with quarry dust and concluded that maximum optimized compressive strength is obtained for optimal mix percentage of Flyash 15% Lime 30% Gypsum 2%
·Then again with the partially substitution of sand with quarry dust the strength properties were reduced Similar trend was observed When compared with the respective R10 mix the 28 days compressive split tensile and flexural strength of the concrete mix containing 20% quarry dust was reduced by % % and % respectively
The study was carried out on M20 grade concrete with water cement ratio Quarry dust can be used as fine aggregate but it has to satisfy the technical requisites like workability and strength Concrete mixes were tested for compressive strength and split tensile strength of concrete replaced by quarry dust was compared
·It is found that the compressive split tensile strength and durability studies of concrete made of quarry rock dust are nearly 14 % more than the conventional concrete The concrete resistance to
·Several studies dealt with the use of quarry dust as fine aggregate for concrete as a strategy of recycling [10][11][12][13][14] [15] [16][17][18][19] There is a growing interest in the waste
·This study looked into the use of marble dust powder in concrete with varied percentages of marble dust 0% 5% 10% 15% & 20% replaced by sharp sand in M20 grade concrete mixes while the
·Quarry dust can be utilized in concrete mixtures as a good substitute for natural river sand giving higher strength at 50% replacement Balamurgan et al 2013
·Ceramic wastes have contributed hugely to environmental pollution in our societies mostly because it is non biodegradable and not reused in any significant quantity presently Research has confirmed the feasibility of incorporating these wastes into cement concrete and asphalt concrete production In this study the use of ceramic tile dust CTD as a
·River sand and lateritic soils were sourced locally around the Landmark University premise with a geographical position of ° N ° E Red earth soil Fig 1 was gotten at a location around a hilly terrain within the University premise while quarry dust Fig 2 was obtained from a quarry site within the township of Omuaran at a location of ° N °
·It is found that the compressive split tensile strength and durability studies of concrete made of quarry rock dust are nearly 14 % more than the conventional concrete The concrete resistance to
b he compressive strength results of quarry dust concrete cubes were obtained in the second series where M25 grade of concrete with 20 25 and 30 percent replacement of 3 Compressive strength of M20 M25 and M30 grade with Compressive strength N/mm2 20 10 0 0 20 25 Percentage replacement 30 41 39 37 35 33 31 29 27 25
As a result quarry dust and river sand are suggested as construction materials for making concrete and can be used to replace river sand up to 30% of the time to achieve the needed compressive strength of not less than the standard Keywords River sand; Quarry dust; Ordinary Portland Cement; Compressive strength DOI /JEES/11 9 06
·Quarry dust can be utilized in concrete mixtures as a good substitute for natural river sand giving higher strength at 50% replacement Balamurgan et al 2013
·reference mix at 28 days corresponding to concrete mix containing 30% quarry dust in place of fine aggregates Compressive strength for concrete mix with 40% quarry dust content was found to be less than that of reference mix Water absorption Water absorption test was carried out for all mixtures and percentage water absorption was measured
·strength of concrete when replacing sand by quarry dust from 0% to 100% in steps of 10% M20 and M25 grades of concrete are taken for the study keeping a constant slump of 60mm The compressive strength of concrete cubes at age of 7 and 28 days is obtained at room temperature Split tensile strength and flexural strength of concrete are found