نتایج جستجو برای: heavy concrete

تعداد نتایج: 200594  

2005
Changsoo Bahn Chul Ki Ko Yong Moon Park

We obtain sufficient conditions for conservativity of minimal quantum dynamical semigroup by modifying and extending the method used in [1]. Our criterion for conservativity can be considered as a complement to Chebotarev and Fagnola’s conditions [1]. In order to show that our conditions are useful, we apply our results to a concrete example( a model of heavy ion collision).

Journal: :Environmental technology 2009
Jaeyoung Choi Dongwook Kwon Jung-Seek Yang Ju Young Lee Young-Tae Park

This study investigated the potential for utilizing six treatment agents (two limestones, sand, starfish, black shale, and concrete as treatment agents for acid mine drainage (AMD) wastewater. These materials, with a high capacity for heavy metals, can be obtained and employed as alternative low-cost limiting substitutes. For investigating the neutralization capacity, the change in pH, Eh, and ...

1998
Marcel Honegger Alain Codourey

In tunneling and mining construction work, heavy and large manipulators are used to spray liquid concrete on the walls. These manipulators are usually operated manually with simple units allowing to control all actuators independently. In cooperation between industry and university, a novel control system has been developed for the redundant heavy manipulator Robojet® that supports the operator...

Journal: :Waste management 2016
A Keulen A van Zomeren P Harpe W Aarnink H A E Simons H J H Brouwers

Municipal solid waste incineration bottom ash was treated with specially designed dry and wet treatment processes, obtaining high quality bottom ash granulate fractions (BGF) suitable for up to 100% replacement of natural gravel in concrete. The wet treatment (using only water for separating and washing) significantly lowers the leaching of e.g. chloride and sulfate, heavy metals (antimony, mol...

2017
Buddhima Indraratna Gyanendra Regmi Long Nghiem Duc Nghiem Alexandra Golab

Contaminated groundwater resulting from pyrite oxidation of acid sulphate soils (ASS) is a major environmental problem in coastal Australia. A column test was carried out for an extended period with recycled concrete to study the efficiency of the reactive materials for neutralising acidic groundwater. Results show that the actual acid neutralisation capacity of the recycled concrete could decr...

2006
G. Hüsken H.J.H. Brouwers

Earth-moist concrete mixes are the starting substance for the mass production of concrete products like pipes, slabs, pavement stones and curb stones. The working properties of earth-moist concrete (EMC), caused by its dry consistency, are advantageous. So, in comparison to normal-weight concrete, the consistency of EMC allows for direct stripping of concrete products after filling and vibratin...

Journal: :DEStech Transactions on Engineering and Technology Research 2017

Journal: :Journal of the Korean Geotechnical Society 2013

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