جستجوی مقالات مرتبط با کلیدواژه « نخاله ساختمانی » در نشریات گروه « زمین شناسی »

Backfill materials used to fill underground mines are a type of engineered material whose particle size distribution (PSD) directly affects their mechanical and physical properties. According to the authors' review, there is no comprehensive standard for the properties of aggregates used in underground mine backfill materials. In this paper, the particle size ranges and particle size distribution curves of various mine backfill materials, including hydraulic backfill, paste backfill and rock backfill, have been reviewed. The available data on different types of backfill materials were collected. Based on the collected data, the smallest particle size, the largest particle size and the PSD curve ranges for each type of backfill material were determined. Then the characteristics of the particle size distribution curve of each backfill material, including the mean particle diameter (D50), the uniformity coefficient (Cu) and the curvature coefficient (Cc), were calculated.  The results of the analysis of the PSD curves for paste backfill, hydraulic backfill and rock backfill materials showed that the particles in rock backfill and paste backfill had the largest and smallest sizes, respectively. Finally, the particle size distribution characteristics of a new backfill material prepared from construction and demolition waste (CDW backfill) are presented and compared with the particle size distribution of each of the conventional backfill materials. The results indicate that the PSD curve of the CDW backfill lies at the upper limit of the range of the particle size distribution curve of hydraulic backfill and at the lower limit of the range of the particle size distribution curve of rock backfill.

The growth of urban population, thus continuing the upward trend in production and waste discharge into the environment, humans and the environment surrounding the multiple problems stems. Including concern due to the increasing population and development in the city, a certain type of proper management of waste, construction waste and reducing pollution caused by it is the environmental. Hence the proper management of construction waste, locating the perfect place for burial in landfill construction will be necessary. Determine the location of the tomb optimal health and favorable requirements engineering methods and processes that optimize the performance of each of them affect the final result. the natural environment surrounding landfill is investigated. Despite multiple parameters in the landfill, better managing time, cost and complexity of design, powerful tools of GIS have been used. By collecting and combining data layers required to determine suitable areas for construction waste landfill Yazd hierarchical analysis method was used. Information relevant weighting of each layer and the substrate and the final map using layers of privacy, forbidden zones removed. 4 The final map of area was perfectly fit in the category. Due to the impact of the prevailing wind direction is ultimately the best place for landfill was diagnosed two regions.