礦物加工中涉及的冶金過程會(huì)產(chǎn)生大量的廢物,可能會(huì)引起各種各樣的環(huán)境問題。由于低等級(jí)礦石的開采和經(jīng)濟(jì)效益的最大化,銅尾礦的處置對(duì)礦山企業(yè)來說是一項(xiàng)艱巨而繁瑣的工作,如果不進(jìn)行嚴(yán)密的監(jiān)測,不加強(qiáng)對(duì)尾礦的管理,會(huì)導(dǎo)致環(huán)境污染。在贊比亞,銅尾礦的累積量不斷增加,重金屬滲入附近水體,并在河流和溪流中沉積。另一方面,以前的研究人員已經(jīng)記錄到,露天燃燒、廢舊輪胎的儲(chǔ)存/填埋會(huì)導(dǎo)致重金屬的浸出、有毒氣體進(jìn)入生態(tài)環(huán)境�；谝酝难芯咳藛T記錄的建筑業(yè)中銅尾礦和輪胎衍生集料的使用情況,人們越來越認(rèn)識(shí)到銅尾礦和輪胎衍生集料對(duì)環(huán)境的不利影響以及混凝土集料原材料成本的增加問題。本研究以五種不同的銅尾礦為研究對(duì)象,將銅尾礦作為低強(qiáng)度混凝土中的天然細(xì)集料替代材料,同時(shí)用銅尾礦和輪胎衍生集料替代多種天然細(xì)集料。從中國和贊比亞采集了五種銅尾礦樣品,其中的兩種銅尾礦來自中國云南省,命名為云南銅尾礦I與II,其他三種銅尾礦來自贊比亞銅帶省的Kakosa、Muntimpa和Mindolo尾礦儲(chǔ)存場地。以銅尾礦作為細(xì)集料替代料的混凝土試樣,其無側(cè)限抗壓強(qiáng)度可達(dá)到35.6MPa,30%銅尾礦替代料的無側(cè)限抗壓強(qiáng)度最高,28.77%... 

【文章來源】：東南大學(xué)江蘇省 211工程院校 985工程院校 教育部直屬院校

【文章頁數(shù)】：112 頁

【學(xué)位級(jí)別】：碩士

【文章目錄】：
DEDICATION
摘要
ABSTRACT
ACKNOWLEDGEMENTS
CHAPTER 1 INTRODUCTION
    1.1 Research Background
    1.2 Problem statement
    1.3 Objectives
    1.4 Primary objective
    1.5 Sub objectives
    1.6 Research questions
    1.7 Hypothesis
CHAPTER 2 LITERATURE REVIEW
    2.1 CT as FA
    2.2 TDAs
    2.3 Vertical Cut-off wall
CHAPTER 3 MATERIALS AND METHODS
    3.1 Materials
        3.1.1 Characteristics of the utilized FA and CA
        3.1.2 Designed concrete mix proportions
        3.1.3 pH of raw CT
        3.1.4 Raw CTs TCLP test
        3.1.5 Mortar paste mix design
        3.1.6 Copper tailing Cement (CTC) Samples
        3.1.7 CT cement bentonite (CTCB)and Nanjing silt cement bentonite (NSCB)
    3.2 Methods
    3.3 Methods for low strength concrete and mortar paste
    3.4 Methods for mortar paste
    3.5 Methods for the permeability of fine grained CT<0.074mm
CHAPTER 4 LOW STRENGTH CONCRETE AND MORTAR PASTE
    4.1 Unconfined compressive strength (UCS)
    4.2 Leachate pH and leachability of heavy metals in concrete specimens
    4.3 Mortar paste analysis
    4.4 Microstructure analysis in the concrete mix
        4.4.1 X-Ray diffraction (XRD) analysis
        4.4.2 Scanning Electron Microscope (SEM) analysis
CHAPTER 5 VERTICAL CUT-OFF WALL
    5.1 Kakosa-CT and Soil Classification
    5.2 Dry density and optimum water content
    5.3 Workability of the NSCB and CTCB
    5.4 Permeability Test
        5.4.1 Permeability of compacted CT<0.074mm
        5.4.2 Permeability of compacted CTC,CTC paste,CTCB and NSCB
        5.4.3 Calculation of effective stress,cell and seepage pressure
        5.4.4 Testing procedure
        5.4.5 UCS of compacted cemented CT (CTC) and CTC paste samples
        5.4.6 Permeability and UCS of CTCB and NSCB sample
CHAPTER 6 CONCLUSION AND RECOMMENDATION FOR FUTURERESEARCH
    6.1 Conclusions
    6.2 Recommendation for future research
REFERENCES
AUTHOR INTRODUCTION
PUBLICATIONS
APPENDIX A. LETTER TO THE GEOLOGICAL SURVEY OF ZAMBIA
APPENDIX B (Ⅰ). MINERAL VALUATION CERTIFICATE
APPENDIX B (Ⅱ).MINERAL VALUATION CERTIFICATE
APPENDIX C. MINERAL ROYALTY CERTIFICATE


【參考文獻(xiàn)】：
期刊論文
[1]活性MgO碳化固化土的滲透特性研究[J]. 王亮,劉松玉,蔡光華,唐昊陵.  巖土工程學(xué)報(bào). 2018(05)



本文編號(hào)：3329743