News and Information for Customers and Partners May 2005

A magazineof the SEG-Group

Editorial 2

Latest developmentsBVK/VGB Fly Ash Conference: “Fly ash in concrete – New insights” 3

TechnologyAvoiding harmful alkali aggregate reaction (AAR) with fly ash 4

ASIKOS blasting abrasives for perfect surfaces 6

One year of the SEG-Group Laboratory 8

LogisticsQuality management at MINERALplus 9

MINERALplus manages waste flows in the RAG Group 10

The inside viewEimol Prinz zo sin …, süns häste jet versäump 11

In a nutshell 12

02 Editorial

Dear Readers,

“Rely on our strengths”, is the motto of the SEG-Group. To giveyou the opportunity to utilize all our strengths, beginning nowwe would like to inform you not only about “fly ash in con-crete”, but also about all other activities of the SEG-Group.

I particularly welcome our many new readers who are cus-tomers of MINERALplus and ASIKOS.

In our first joint issue we inform you about the quality man-agement practiced by MINERALplus, how waste flows are man-aged in the RAG Group, and how the SEG-Group Laboratoryfared in its first year.

ASIKOS Strahlmittel GmbH is the global player in the SEG-Group. The company buys and sells blasting abrasives in morethan 30 countries, quite to the satisfaction of its customers. Inthe Technology section we report on the extensive ASIKOSproduct range.

Your opinion counts! To better serve your information needs,we are including a questionnaire in this issue and ask you tomake comments and suggestions. We look forward to receivingas many replies as possible and will raffle off a number ofattractive prizes among the respondents.

I hope you enjoy reading Seg·ment!

Your Rudolf MauderChairman of the Management BoardSTEAG Entsorgungs-GmbH

ContentsEditorial

BVK/VGB Fly Ash Conference: “Fly ash in concrete – New insights”

Two hundred and sixty people from industry, administrative author-ities and universities came to Frankfurt on the 3rd of March toattend the fifth “fly ash in concrete” conference at the invitation ofBVK and VGB.

Nine experts in all, representing different points of view, spoke onthe subject of the conference. Here a brief review:

Dr. U. Wiens from the German Reinforced Concrete Committee(DAfStB) in Berlin furnished a general overview of the existing rulesand regulations concerning fly ash and pointed to extended uses infuture rules and regulations.

Prof. W. Brameshuber from the Construction Research Institute ofRWTH Aachen reported the results of a joint research project with“Centrum Baustoff München” (Munich Building Materials Center) onthe stresses caused by frost and deicing agents salts in concretecontaining fly ash.

“Allowance for fly ash with a k-value of 0.4 in the exposure classesXF2 and XF4 … thus is possible from the viewpoint of concrete tech-nology.”

Dr. H.-P. Backes from BauMINERAL in Herten described the func-tions of advanced building materials management based on theexample of hard coal fly ash, pointing to the interrelations with thereduction of greenhouse gases. “All elements of the life cycle ofcement-bound building materials must be carefully scrutinized.”

Physicist A. Becker from Hochtief in Möhrfelden-Walldorf gave areport on Hochtief bulk concrete (HTM). The product has been li-censed for general use by the building control authorities sinceOctober 2003. It is manufactured with a cementitious content of atleast 180 kg/m3, and hard coal fly ash can be fully counted towardsthe equivalent water-cement ratio with the activity index k = 0.7.Based on the good experience with a total of 93,000 m3 of concrete,Mr. Becker spoke out in favor of expanding the existing complex ofrules with regard to the inclusion of fly ash.

Prof. P. Schiessl from Munich’s Technical University spoke about theuse of hard coal fly ash to enhance resistance to sulfates in compli-ance with DIN EN 206/DIN 1045-2 as well as the international expe-rience gained in this area. “The aim should be to develop a test pro-cedure which correctly shows the resistance to sulfates obtainablewith the cement-binder mixture in concrete.”

Dr. R. Härdtl from the Heidelberger Technology Center in Leimenpointed out the growing importance of CEM II cements in theGerman market, in which connection fly ash will play an importantrole, not least of all for ecological reasons.

Dr. J.P. Wagner from Bilfinger Berger in Mannheim reported on the new ICE high-speed rail line Nuremberg – Ingolstadt. Some420,000 m3 of concrete were used on the line, especially in bridgesand tunnels. He referred to the positive influence which fly ash hason the properties of concrete. In all, around 53,000 tons of fly ashwere used as concrete admixture, on average more than 100 kgFA/m3 concrete.

Prof. D. Heinz from Munich’s Technical University referred in hisremarks to the favorable influence of fly ash on the avoidance ofharmful alkali reactions, documenting this with new researchresults.

Dr. C. Hübsch from Degussa Construction Chemicals GmbH inTrostberg previewed future concrete technology from the viewpointof modern additives. “PCE molecule structure can be exactly tailoredto the concreting problem to be solved.”

The conference reports of the individual authors are available on request from the conference organizers BVK and VGB.www.bvk-online.com or www.vgb.org

Latest developments 03

Ein Beitrag von STEAG-Entsorgung

Latest developmentsAlmost 260 attendees listened to the reports.

Lively conversations during the breaks too.

A report by STEAG-Entsorgung

Avoiding harmful alkali aggregate reaction (AAR)with fly ash

The alkalis contained in concrete are only partly absorbed by thehydration products which form and, as a consequence, are availa-ble to react with the reactive crystalline silica which occurs insome rock granulations. A gelatinous alkali-silicic acid mass formswhich can lead to blowing in hardened concrete, and thus tocracking. To better understand how fly ash works in relation toalkaline reactions in concrete, VGB PowerTech e. V., the power andheat generation association, commissioned the research projectsdescribed below.

VGB P 244: Alkali binding in fly ash-containing binding mate-rials – studies of aged samples

At the Construction Research Institute (ibac) of RWTH Aachen,hardened cement specimen from earlier research projects havebeen stored under controlled conditions since their manufacture.More than eight years old, these specimen were analyzed in aresearch project and the obtained data evaluated. The resultsascertained after long-term storage permit inter alia meaningfulstatements about the influence of fly ash content on the chemi-cal composition of the pore solution. It was demonstrated thatbindersystems containing fly ash do not possess an increasedchemical capacity for alkaline reaction.

Technology

04 Technology

A look inside the fog chamber.

In the analyzed hardened cement specimen, even after this longstorage period a continuation of the pozzolanic reaction still canbe observed. This increasing structural density effectively coun-teracts any chemical attack, from within or without, and, conse-quently, any damage to the concrete.

VGB P 245: Use of hard coal fly ash as concrete admixture to avoid damaging alkali aggregate reactions in the case ofalkali-sensitive aggregates

This ongoing research project at the Construction Materials andMaterial Testing Center (cbm) of Munich’s Technical Universityinvestigates whether the use of fly ash affords the possibility ofavoiding damaging alkaline reactions in concrete. Long-standinginternational experiences indicate this. In addition, this researchwork is intended to provide a better understanding of the mannerin which fly ash affects alkaline reaction in concrete. The theore-tical research approach ascribes three mechanisms to fly ashwhich may lead to the avoidance of damaging alkali silica reac-tions. The assumption is that when fly ash for cement, dilution ofthe active alkali fraction in the concrete occurs and alkalis areabsorbed by products of pozzolanic reaction. Also, the increasingstructural density of the concretes with fly ash makes the trans-port of alkalis to the point of reaction more difficult. Initialresults are available from this project.

VGB P 249: Use of hard coal fly ash as concrete admixture inself-compacting concrete with alkali-sensitive aggregates

Based on research project VGB P 245 described above, theConstruction Materials and Material Testing Center of Munich’sTechnical University is broadening the existing test matrix withrecipes for self-compacting concrete. The basic suitability of flyash for self-compacting concrete was demonstrated in earlierresearch projects and has been confirmed in practice. This re-search work has the purpose not only to verify the statementsmade in regard to high fly ash content in project P 245, but alsoto provide proof that fly ash can be used even in quantities of asmuch as 50 % in weight of binding materials, and still not giverise to a harmful alkali silica reaction. The fly ash is being testedin combination both with NA (low alkali) cements and Portlandcements with high alkaline content.

Additional information on the projects can be obtained directly from VGB PowerTech http://www.vgb.org/fue_umwelt-schutz.html.

Technology 05

Test cube with alkali-sensitive

rock granulation, but without

hard coal fly ash, after six

months storage in the fog

chamber.

Test cube with alkali-sensitive

rock granulation and hard

coal fly ash after nine months

of fog chamber storage.

A report by ASIKOS Strahlmittel

ASIKOS blasting abrasives for perfect surfaces

ASIKOS Strahlmittel GmbH produces and markets mineral and met-al blasting abrasives. The experience of more than three decadesgained in more than 30 countries assures the customer competent,individual counseling in choosing suitable products for a wide rangeof tasks.

In its own factories in Duisburg and Herne, ASIKOS produces theenvironmentally friendly mineral blasting abrasives ASILIKOS®, ASI-LIT® and AFESIKOS® as well as the decorative aggregate ASILUX.

The starting material for these products is the slap-tap granulateproduced in the process of converting hard coal into electricity. Thematerial is the molten mass of noncombustible mineral componentsof coal which solidifies in a water bath. It is dried in the plants,impact-crushed into different particle sizes and screened.

Several specialty products additionally are passed over a magneticseparator so that they meet all requirements of nonferrous products.

ASILIKOS®, the environmentally friendly, disposable blasting abra-sive, finds worldwide use chiefly in the derusting of steel by meansof pneumatic blasting techniques in bridge and ship building, boilerand tank making, and freight car manufacture. But even “stone washed” jeans are treated with fine blasting abrasives to achieve the fashionable “old” look.

ASILIT® mainly is used for the gentle cleaning of mineral construc-tion materials in building maintenance and in the preservation ofhistoric buildings and monuments, but also to gently remove graffi-ti from almost all surfaces.

Expert opinions of the architecture and civil and structural enginee-ring school, “ARGE Hochschule für Architektur und Bauwesen”,Weimar, and the building maintenance consulting engineers

“Ingenieurbüro für Bauwerkserhaltung”, Weimar, substantiate thegentle cleaning action on many different types of building surfaces.But not only that: proof is provided in particular by the worldwideacceptance and use of ASILIT® for the rehabilitation of buildingsand other structures.

AFESIKOS®, the special nonferrous blasting abrasive, is mostly usedto treat high-alloy special steels and is an ideal blasting abrasive forpreparing high-grade steel surfaces.

ASILUX, the decorative building material from ASIKOS, is used as afacing material in the concrete block industry. This material alreadyfinds use today in more than 12 countries, and acceptance in othercountries constantly grows.

The ASIKOS-owned factories in Duisburg and Herne not only makeproducts from slag-tap granulate, but manufacture other environ-mentally friendly blasting abrasives and miscellaneous productsfrom corundum and glass.

Corundum, a synthetically manufactured nonferrous mineral mate-rial, is procured from Russia and China and finished in the ASIKOSplants for use as an blasting abrasive in the European target mar-kets. Owing to its properties, the material is suited especially for theexacting and highly efficient treatment of special surfaces by meansof pneumatic blasting techniques.

Glass can be used as an blasting abrasive, but, in different colors,also as a decorative building material. There are more mineral rawmaterials available for processing at our plants. We will report onthem separately in one of the next issues of Seg·ment.

Technology

06 Technology

For more than a decade, ASIKOS has been procuring the mineral gar-net in south India. Red garnet sand – a semiprecious stone – wash-es onto the coast of southern India, is directly worked there, washed, dried and screened into commercial sizes. The nonferrous

material obtained in this way seesuse around the world as an blast-ing abrasive and cutting means.Garnet sand serves as an excellentblasting abrasive because it isnonferrous and can be reusedseveral times; it is an indispensa-ble blasting abrasive material forhigh-pressure waterjet cutting.

With this technique, materials like metals, ceramics, hard rock and glass can be cut into any shape imaginable with ultrasharp precision.

In addition, ASIKOS markets glass bead as a nonferrous blastingabrasive especially for the compacting of surfaces; particularlysmooth surfaces can be obtained with it.

Apart from the mineral products, ASIKOS also offers metal blastingabrasives for surface treatment. ASIKOS sources the metal blastingabrasives steel shot and steel grit from a partner in Slovenia underan exclusive agreement and has been doing so for over two decades.These materials are suited for cleaning, derusting, descaling, debur-ring, and for trimming castings. Metal blasting abrasives have a longlife (endurance) and are suitable for airless and pneumatic blastcleaning.

The varied and extensive product range of ASIKOS is matched by thevariety of possible ways to package the products.

Whether in paper sacks or plastic sacks, units of 20, 25 or 50 kg, inbig bags holding 1,000 kg or 1,500 kg, in loose form in bulk carriers,or in ASIKOS-owned rented containers, the choice is up to the customer.

More than three decades of experience have made ASIKOS the mar-ket leader. To live up to its reputation, ASIKOS has embodied a com-prehensive product responsibility in its corporate policy. This invol-ves a self-commitment and dedication to the environmentally com-patible design of production and logistics processes as well as envi-ronmentally friendly product use and the handling of used products.

Specifically, for the customer this means we voluntarily take backused and spent blasting abrasives, though at a charge. The usedmaterial then is analyzed in order to find a suitable use for it, inconformity with the recycling/waste management laws, at contract-protected and officially certified sites.

ASIKOS Strahlmittel GmbH manufactures and supplies the materialfor perfect surfaces to more than 2,500 customers around the globe,offering them the all-in service that one can expect of a market leader.

For more information, contact Ms. Andrea Schamberg: Tel +49 2064608-223, E-Mail andrea.schamberg@asikos.de

Enclosure on Rendsburg Bridge. ASIKOS plant, Herne.

Technology 07

A report by MINERALplus

One year of the SEG-Group Laboratory

More than a year ago, the SEG-Group Laboratoryoccupied newly built premises on the grounds ofMINERALplus in Gladbeck. Seg·ment spoke with labmanager Mr. Jürgen Hußmann about the SEG-GroupLaboratory.

Seg·ment: Your job was to take two existing laboratories, the SEG con-struction materials laboratory and the MINERALplus laboratory, andmake one laboratory, the SEG-Group Laboratory. Taking stock, what isthe outcome after one year?

J. Hußmann: Integration was successful. We managed to grow togetherinto one efficient laboratory last year which will handle assignmentsfrom the SEG-Group as company lab in a first phase. In a second phasewe now intend to open the lab to external customers. We have alreadyobtained the first smaller customer orders.

Seg·ment: The new SEG-Group Laboratory has a chemical-physical sec-tion and a construction section. What are the main task areas of theSEG-Group Laboratory?

J. Hußmann: The emphasis of work is on the continuous monitoring ofthe operation of our plants and quality surveillance for the power plantbyproducts marketed by SEG. In addition, we take individual orders forinorganic-chemical, physical and structural engineering analyses fromMINERALplus and the SEG-Group. For instance, we examined corundumfor ingredients on behalf of the firm ASIKOS. And we were not idle lastyear in the field of product development either. Licenses were request-ed, and meanwhile issued, for three new product groups in all. For theasphalt filler MinCom AF 40 developed by us, a KOMO product certifica-te was awarded. KOMO refers to a Dutch certification procedure whichencompasses both the product quality and the management system.Three permits were issued for the shaft mining backfill material MinComSV with different strenght classes. In the approval test, the environ-mental compatibility of the material was demonstrated by the RuhrDistrict Hygiene Institute; the technical suitability was demonstrated byDeutsche Montan Technologie (DMT). The third product is the miningmortar MinCom DB, the approval test for which again was performed byDMT, and which has been included in the list of allowed constructionmaterials by the mining authorities.

Seg·ment: To handle such a wide range of duties you certainly needcomprehensive testing equipment.

J. Hußmann: Yes. As example, let me cite the identification of heavymetals in substances and eluates by means of ICP, RF or AAS in our che-mical-physical department. In addition, we have a spectrophotometerto analyze chromate, for example, and a calorimeter with which we cananalyze free lime. By combining the two laboratories we got two fullyequipped binder testing units and the concrete unit. The binder andconcrete section was enlarged with a new module for the existing testpress. This now allows us, for example, to test the parameter tensilesplitting strength required for concrete products. Of course, to checkfresh concrete we successfully employ the steag HYDRO_5® fresh con-crete tester, which we will describe in detail elsewhere. To develop theasphalt filler we purchased all the road engineering testing devicesrequired for the purpose.

Seg·ment: What additional assets does the new SEG-Group Laboratoryhave?

J. Hußmann: We have well trained employees who partly work in bothsections of the SEG-Group Laboratory. This enables us to utilize one orthe other synergy effect. Moreover, the SEG-Group Laboratory is inte-grated in the DIN EN ISO 9001 management system of MINERALplus. Asfurther qualification, the SEG-Group Laboratory meets the requirementsof DIN 1045 and is listed by the Association of Material Testing Agencies(VMPA) as concrete testing center W.

Seg·ment: Thank you for talking to us, Mr. Hußmann.

For more information, contact Jürgen Hußmann: Tel +49 2043 4001-34,E-Mail juergen.hussmann@mineralplus.de

08 Technology

Technology

Jürgen Hußmann,

head of the SEG-

Group Laboratory,

during the interview

Logistics 09

“We not only want to distinguish ourselves from our competitors,but above all give waste producers the security they need.”

When the “qualified waste disposal firm” ordinance was introducedin 1996, this was a decisive reason for MINERALplus to have its ownconstruction material mixing plant certified as a qualified waste dis-posal operation on the basis of the recycling/waste management actby RWTÜV Systems GmbH, Central Dept. Certification EnvironmentalManagement and Occupational Safety. In requesting certification asqualified waste disposal specialists, MINERALplus was exacting highstandards of itself for its waste treatment and recycling activities.

In November 2004 MINERALplus had its trading unit newly certifiedto give itself the required legal security. MINERALplus is one of thefirst companies with certified trading operations.

The trading certification was appreciably facilitated by the qualitysystem in compliance with DIN EN ISO 9001: 2000 Quality Systems –Requirements which MINERALplus introduced parallel to the certifi-cation as waste disposal specialists. The system lays down standardsfor organization, equipment, expertise and reliability and conse-quently establishes the essential instruments both for certificationas waste disposal specialists and certification of the trading activi-ties.

The quality system was examined by TÜV CERT Certification Agencyfor Quality Systems of RWTÜV Systems GmbH. It was attested toMINERALplus that the company, in conformity with the TÜV CERTprocedure, has introduced, and consistently applies, a qualitysystem covering the areas trade in and procurement of wastes, pro-vision and procurement of disposal services, development and pro-duction of construction materials using industrial wastes, and ope-ration of a testing and monitoring laboratory. The demands on quality systems formulated in DIN EN ISO 9001: 2000 are met byMINERALplus.

Joint annual surveillance audits which concern the specialist dispo-sal firm’s activities in the treatment and recycling of wastes, thetrade in wastes, as well as the quality system, provide proof at regu-lar intervals of the necessary expertise, the necessary equipmentand the firm’s reliability.

A report by MINERALplus

Logistics

Quality management at MINERALplus

Thus, MINERALplus as waste disposal firm offers not only conven-ient, well-priced solutions individually tailored to the customer, butalso guarantees a high level of quality and complete transparencywith its certification as a waste disposal specialist and with the certificate obtained for its trading activities.

For more information, contact Mr. Dietmar Andresen: Tel +49 20434001-68, E-Mail dietmar.andresen@mineralplus.de

It’s a good year since MINERALplus took overthe waste management function in the RAGGroup. The basis is created by eight frameworkagreements covering all wastes produced inthe companies of the Group. The list includesused paper, biological waste, wastes contai-ning chlorinated hydrocarbons, data media, etcetera, all the way to zinc sludge, and compri-ses almost all types of wastes covered by the waste register ordinance. Special wastesrequiring particular supervision also are inclu-ded, of course.

Along with the multitude of waste types it isthe places of occurrence and the specific con-ditions prevailing there which determine thechoice of the most suitable disposal method –places like the power plant sites of STEAG onthe Rhine and Ruhr rivers and the refinerypower plant in Leuna, the mines of DSK (theGerman coal mining corporation) in NorthRhine-Westphalia and in the Saarland, thechemical plants of RÜTGERS in Castrop-Rauxeland Duisburg. In addition, the administrativefacilities of RAG and its Group member compa-nies and other buildings and premises are served.

More than a year ago, MINERALplus with itsgeneral management concept came out on topin the bid invitation organized by RAG. Theprimary aim of concept implementation is toreduce the cost of disposal.

The first step was stocktaking at the individu-al locations. The disposal methods then werecoordinated and agreed by MINERALplus witheach business unit. After checking for therequired permits, MINERALplus engaged sub-

A report by MINERALplus

Logistics

MINERALplus manages waste flows in the RAG Group

10 Logistics

contractors to carry out the disposal operations. These are often thesame disposal firms that handled the work at the individual sites pre-viously, so that initially there were no major changes for the units.

The second step is to implement improvement programs. For example,potential new methods of recycling or disposal are examined for selec-ted waste types; the waste flows of various units are bundled; firms spe-cializing in particular waste types are hired. Separate awarding of trans-port and disposal contracts and the use of spot markets likewise permitcutting cost.

The customers profit additionally from the simplification of processes.MINERALplus is the only firm they have to get in touch with to addressa vast range of problems, and invoices come from only one firm,MINERALplus.

MINERALplus successfully offers it general management concept also toother enterprises. For instance, for years MINERALplus has been man-aging the waste flows of Sasol Germany GmbH in Brunsbüttel. Sasolbelongs to the South African oil, gas and chemicals group of the samename headquartered in Johannesburg. In Germany, Sasol manufacturesinclude fatty alcohols, base materials for detergents, oxygenic solvents,and special inorganic chemicals. Stadtwerke Lünen GmbH andStadthafen Lünen GmbH (the utilities and port authority of the city ofLünen) also have been customers of MINERALplus for years.

For more information, contact Dr. Peter Kamp: Tel +49 2043 4001-73, E-Mail peter.kamp@mineralplus .de

MINERALplus engages subcontractors

to carry out the disposal operations.

The meaning of this saying, written in the Cologne dialect: “Just once inyour life a prince, otherwise you’ve missed something.” Prince Walter II,alias Walter Passmann, Product Manager Refuse Derived Fuels at STEAGEntsorgungs-GmbH and designated general manager of our new companyabroad, can only underscore this.

His life’s dream came true when he was proclaimed Prince Carnival onJanuary 7, 2005.

That being a prince is not all pleasure, but sometimes back-breakingwork, was quickly learned by Prince Walter II.

On January 1, 2005, he said goodbye to his family and friends and tookup quarters with Peasant Uli (Ulrich Döres), Maid Claudia (Claus Frohn)and entourage in the Imperial Palace (Dorint Kongress Hotel, Cologne).From then on the protocol of Royal Counselor Werner Sobik was law.

The Cologne Triumvirate (Prince, Peasant and Maid) made almost 400appearances on 33 days during the past Carnival season.

A day during the season begins for His Royal Craziness normally aroundnoon, i.e., shortly after getting up.

Interviews and visits to hospitals, kindergartens, geriatric day-care cen-ters, big enterprises in Cologne were strung together over the day, to befollowed in the afternoon by the first Carnival convention meetings,which would occupy the Triumvirate until the wee hours.

Time was in short measure, and the Triumvirate unfortunately was notalways able to escape the dictate of time and do more than merely marchin, beam, wave, kiss cheeks, spread cheer and make a short speech. Butthis Triumvirate took every opportunity to enrich the program, as thethree did at the meeting for the blind in the Sartory Halls, Cologne. Herethe Triumvirate truly pressed the flesh, walking through the rows ofguests so that the audience could actually touch the Prince, Peasant andMaid in their robes. Carnival with all senses.

These were strenuous days that usually ended between 2:00 and 4:00 inthe morning when the Prince returned to the hotel with his entourage.

Nonetheless, the 35-year-old Passmann enjoyed it: “As Prince Carnivalyou forget time and space.” Understandable, what with a daily stint thathardly leaves time to digest all the experiences.

As a native of Cologne Walter Passmann gladly accepted the honor.

In Cologne, Prince, Peasant and Maid are heroes of the Carnival period,which, as everyone knows, starts with the season opening ceremony inCologne’s medieval center at 11:11 a.m. on the 11th of November.

The Triumvirate stood in the limelightsince its election in September 2004.All appointments had to be coordi-nated with the Festival CommitteeCologne Carnival, and again and againthey had to face the press and themedia.

But the effort was worth it. “An inde-scribable feeling”, Walter Passmannrecalls when he opened the seasontogether with Peasant Uli and Maid Claudia in front of 30,000 people onthe Heumarkt. “This euphoria and cheerfulness sweep you along throughthe entire season.”

The people love their Triumvirate. Acclaimed by the Carnival cultists inCologne, shedding all personal prejudices the Triumvirate strides throughthe Cologne Carnival in all its rich forms, letting itself be wildlyapplauded.

Prince Walter II is quite taken by the whole thing: “In no time you get toknow so many interesting personalities from the political, business andcultural worlds and, straightaway, are on familiar terms with them. Whatother position or office offers you such an opportunity? And in Cologneyou remain Prince for a lifetime. The Tradition Society in which all pastTriumvirates are members makes sure of that.”

To sum up: despite all the stress and strain it was an indescribably won-derful time being Prince Carnival in the Cologne Triumvirate. Passmannwill never forget it.

The inside view 11

A report by STEAG-Entsorgung

Eimol Prinz zo sin…, süns häste jet versäump

The inside view

Imprint

Publisher:STEAG Entsorgungs-GmbHDuisburger Str. 17046535 Dinslaken

Telefon +49 2064 608-210Telefax +49 2064 608-358Internet www.steag-entsorgung.deE-Mail seg@steag.de

Editors:Gritt DietzTelefon +49 2064 608-282E-Mail gritt.dietz@steag.de

Nicola BenscheidtTelefon +49 2064 608-322E-Mail nicola.benscheidt@steag.de

STEAG Entsorgungs-GmbH is a company of the STEAG Group.

Printing:Laupenmühlen Druck

ASIKOS Strahlmittel GmbHDuisburger Str. 17046535 Dinslaken

Telefon +49 2064 608-231 and -274Telefax +49 2064 608-348 and -340Internet www.asikos.deE-Mail vertrieb@asikos.de

MINERALplus Gesellschaft für Mineralstoffaufbereitung und Verwertung mbHStollenstraße 12-1645966 Gladbeck

Telefon +49 2043 4001-0Telefax +49 2043 4001-15Internet www.mineralplus.deE-Mail info@mineralplus.de

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In a nutshell

MINERALplus has successfully completed the certification of threenew product groups. MinCom AF, MinCom DB and MinCom SV extendthe product range by an asphalt filler, an underground constructionmaterial and a mining shaft backfill material. The shaft backfillmaterial MinCom SV is available in different strenght classes.

For more information, contact Mr. Jürgen Hußmann: Tel +49 20434001-34, E-Mail juergen.hussmann@mineralplus.de

The “ICCX International Concrete Conference & Exhibition 2005” istaking place from 18 to 20 May in St. Petersburg. Dr. MichaelLichtmann, STEAG Entsorgungs-GmbH, will speak at this event onthe “use of fly ash as admixture in concrete products and precastconcrete elements”. In the next issue we will report the main con-tents of his presentation.

An article entitled, “Practical determination of the optimum watercontent of self-compacting concrete”, by Dr. Michael Lichtmann andAndreas Gross, was printed in “VDB Information” 93/05, which waspublished for the annual meeting of the Association of GermanConcrete Engineers (VDB).

The reason for the publication: the introduction by the building con-trol authorities of a code of practice for self-compacting concrete inDecember 2004 and its inclusion in Building Regulations List A Part 1, Edition 2004/2. Concurrently, Dr. Michael Lichtmann gave atalk on this subject to the VDB Regional Group Rhineland-Palatinate/Saarland.

For more information, contact Dr. Michael Lichtmann: Tel +49 0177 2316786, E-Mail michael.lichtmann@steag.de