Essays about: "Crushed rocks"

Showing result 1 - 5 of 6 essays containing the words Crushed rocks.

  1. 1. Metamorphic microtextures and mineral assemblages in orthogneisses in NW Skåne – how do they correlate with technical properties?

    University essay from Lunds universitet/Geologiska institutionen

    Author : Maria Eleni Taxopoulou; [2020]
    Keywords : granitic gneiss; Eastern Segment; Söderåsen; rock quality; quantitative analyses; grain size; aspect ratio; circularity; mineralogy; Earth and Environmental Sciences;

    Abstract : Glacifluviala avlagringar har varit de vanligaste källorna för byggmaterial i Sverige under de senaste decennierna. De är dock ändliga resurser som måste bevaras eftersom de också fungerar som akvifärer. READ MORE

  3. 2. Increased leaching of metals as a result of foundation work

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Emmy Mattisson; [2018]
    Keywords : Principal components analysis; Modified double mass analysis; Geochemistry; Sulphide bedrock; Remediation methods; Surface water pollution;

    Abstract : Heavy metal contamination in the environment is a global issue that is likely to increase in the future. This report investigates a construction area in which increased concentrations of the heavy metals cadmium, cobalt, copper, nickel and zinc and a decreased pH-value has been observed in the surface water recipient. READ MORE

  4. 3. Material flows in the waterjet industry : an environmental perspective

    University essay from Linköpings universitet/Industriell miljöteknik; Linköpings universitet/Tekniska högskolan

    Author : Daniele Abbatelli; [2014]
    Keywords : waterjet; abrasive; LCA; Life Cycle Assessment; olivine; garnet;

    Abstract : Abrasive Waterjet cutting (AWJ) presents many advantages over competing machining techniques, but several issues are related to the high volume of materials (and in particular of abrasive) used in the process. In this study, the environmental impact of the material flows in the abrasive waterjet industry has been analyzed adopting a life cycle perspective in order to individuate which phases place the largest burden on the environment. READ MORE

  5. 4. Comparative study of established test methods for aggregate strength and durability of Archean rocks from Botswana

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Stålheim Jessica; [2014]
    Keywords : Los Angeles value; aggregate crushing value; aggregate impact value; 10 percent aggregate crushing value test; mean grain size; mean grain size distribution;

    Abstract : ABSTRACT Comparative study of established test methods for aggregate strength and durabilityof Archean rocks from Botswana In the current situation, river sand is used for building of roads and as raw material forconcrete in Botswana. River sand is a finite resource and important to preserve as itacts as natural water purification, groundwater aquifer and protection against soil erosion. READ MORE

  6. 5. Variation in rock quality between metamorphic domains in the lower levels of the Eastern Segment, Sveconorwegian Province

    University essay from Lunds universitet/Geologiska institutionen

    Author : Linda Lundgren; [2012]
    Keywords : rock quality; microDeval test; Los Angeles test; studded tyre test; quantitative analyses; Los Angelesvärde; kulkvarnsvärde; microDevalvärde; bergkvalitet; kvantitativa analyser; Earth and Environmental Sciences;

    Abstract : Populärvetenskaplig sammanfattning: Variationer i bergkvalitet hos gnejser i Halland, sydvästra Sverige För att kunna förklara variationer i bergkvalitet hos hög metamorfa gnejser i Halland, sydvästra Sverige, har tolv gnejser från området undersökts både kvantitativt och kvalitativt. Tanken är att de kvalitativa resultaten, fält- och tunnslipsbeskrivningar, ska kunna användas som prospekteringsverktyg för aggregat till väg och järnväg. READ MORE