The Experts below are selected from a list of 5319 Experts worldwide ranked by ideXlab platform
Dalwon Lee - One of the best experts on this subject based on the ideXlab platform.
-
clogging behavior of recycled aggregates and Crushed Stone as horizontal drains in soft ground
Korean Journal of Agricultural Science, 2013Co-Authors: Dalwon Lee, Jaejin NohAbstract:In this study, laboratory model test carried out to present the suitable range of particle size distribution and clogging behavior of recycled aggregates and Crushed Stone as horizontal drains in soft ground. The recycled aggregates and Crushed Stone showed clogging phenomenon because the top fill material and bottom clay inflow into the horizontal drains. The pp mat was the most effective method to minimize clogging phenomenon. The horizontal coefficient of permeability in case of installing the pp mat showed largely 2.1 times more than the case of not installing. When the pp mat is not installing, the thickness of fine grained soil inflow into the horizontal drains showed 6.7～13.3% range in top fill material and 3.3～6.7% range in bottom clay. Overall, the reduction of the discharge capacity by fine grained soil inflow showed small in recycled aggregates and Crushed Stone. Also, the appropriate criterion range of particle size distribution is presented to make use of a horizontal drains in soft ground on the basis of laboratory test.
-
utilization of recycled aggregates and Crushed Stone as horizontal drains in soft ground
Journal of The Korean Society of Agricultural Engineers, 2010Co-Authors: Dalwon Lee, Jinhyuk LimAbstract:In this study, laboratory model test on utilization of recycled aggregates and Crushed Stone as horizontal drains to use alternative material of sand in soft ground is practiced. The coefficient of permeability of the recycled aggregates and Crushed Stone showed largely 1.2~5.1 times and 2.0~3.3 times greater than sand, respectively. The horizontal coefficient of permeability in case of installing the horizontal perforated drain pipe showed largely 1.9~6.8 times more than the case of not installing. The drainage distance showed 1.7~1.8 times greater than sand. When a degree of consolidation is 90 %, there is no delay of consolidation in SCP and PVD improvement sections. Therefore, it is proven that the field applicability is excellent. Also, the suitable quality management criterion is presented to make use of a horizontal drains in soft ground on the basis of analysis of the physical and environmental characteristics.
Jaejin Noh - One of the best experts on this subject based on the ideXlab platform.
-
clogging behavior of recycled aggregates and Crushed Stone as horizontal drains in soft ground
Korean Journal of Agricultural Science, 2013Co-Authors: Dalwon Lee, Jaejin NohAbstract:In this study, laboratory model test carried out to present the suitable range of particle size distribution and clogging behavior of recycled aggregates and Crushed Stone as horizontal drains in soft ground. The recycled aggregates and Crushed Stone showed clogging phenomenon because the top fill material and bottom clay inflow into the horizontal drains. The pp mat was the most effective method to minimize clogging phenomenon. The horizontal coefficient of permeability in case of installing the pp mat showed largely 2.1 times more than the case of not installing. When the pp mat is not installing, the thickness of fine grained soil inflow into the horizontal drains showed 6.7～13.3% range in top fill material and 3.3～6.7% range in bottom clay. Overall, the reduction of the discharge capacity by fine grained soil inflow showed small in recycled aggregates and Crushed Stone. Also, the appropriate criterion range of particle size distribution is presented to make use of a horizontal drains in soft ground on the basis of laboratory test.
Khaled Marar - One of the best experts on this subject based on the ideXlab platform.
-
effects of Crushed Stone dust on some properties of concrete
Cement and Concrete Research, 1996Co-Authors: Tahir Celik, Khaled MararAbstract:Abstract Crusher dust is a fine material formed during the process of comminution of rock into Crushed Stone or Crushed sand. This dust is composed by particles which pass 75 μm BS sieve. Effects of dust content in aggregate on properties of fresh and hardened concrete are not known very well. An experimental study was undertaken to find out the effects of various proportions of dust content on properties of fresh concrete and hardened concrete.
Abel Tesfaye - One of the best experts on this subject based on the ideXlab platform.
-
effect of partial replacement of Crushed Stone dust filler with waste glass powder in hot mix asphalt concrete production
Social Science Research Network, 2020Co-Authors: Destaw Kifile, Emer Tucay Quezon, Abel TesfayeAbstract:The use of waste recycled materials in road construction nowadays is considered a positive means of providing improved pavement performance. This research focused on evaluating the effect of waste glass powder as a partial replacement of Crushed Stone dust filler in hot mix asphalt. Three hot mix asphalt samples were produced using Crushed Stone dust of 5%, 6.5%, and 8% as mineral filler with five different bitumen content of 4%, 4.5%, 5%, 5.5%, and 6%, respectively. From the preliminary series tests of asphalt contents, a 6.5% Crushed Stone dust filler selected, providing the highest waste glass powder stability. The content of Crushed Stone dust filler was replaced with a rate of 0%, 25%, 50%, 75%, and 100% to test Marshal stability to obtain the Optimum bitumen content and Optimum filler content. Results indicated at 75% replacement of Crushed Stone dust with waste glass powder at 5.10% bitumen content, 12.0kN Marshall stability value, 2.84mm Flow value, 4.0% Air voids, 72.3% VFB, and 2.360g/cm3 Bulk density. Hence, the mixture of 75% waste glass powder by weight of Crushed Stone dust filler meets the minimum requirements of the Ethiopian Road Authority and Asphalt Institute Specifications.
B Kim - One of the best experts on this subject based on the ideXlab platform.
-
recycling of Crushed Stone powder as a partial replacement for silica powder in extruded cement panels
Construction and Building Materials, 2014Co-Authors: T H Song, S H Lee, B KimAbstract:Abstract The continuously increasing amount of Crushed Stone powder normally coming from the production of Crushed aggregates or sawing Stone has led to an increase in the waste disposal costs or instances of improper disposal. In this study, the effective methodology to increase the utilization of Crushed Stone powder was studied by considering CaO/SiO 2 mole ratio in mix design. The hydrothermal reaction to synthesis tobermorite related to strength development was also considered to improve rigidity in hardened cement. The results showed the optimized C/S mole ratio is 0.87 and a valid method for curing conditions relating to hardened cement was desired to be acquired by 2 h of pre-curing, 4 h of atmosphere steam curing (65 °C) and 4 h of autoclave curing (180 °C, 10 atm). The extruded panels satisfied all performance requirements relating to fire resistance as well as sound insulation and can have a possible application to building materials. The main findings of this investigation revealed that the stable crystal formation of tobermorite by the hydrothermal synthesis reaction affects the most important mechanism in hardened cement and mix design by considering C/S mole rate in addition to the analysis of microstructures promotes the recycling of Crushed Stone powder for building materials.