Summary 12010 99 Theme Doctoral research Doctoral research: sense or nonsense? (pp. 4 - 6) Hans Ramler, Managing Director of BAM Wegen, made some comments about techni- cal university teaching in his column in Cement 2009/1. Doctoral research was one of the things he had a go at. At a meeting of Stufib members in October 2009 he explained his concerns in greater detail. This article is a follow-up, which also introduces the theme of doctoral research. Effect of temperature on carbon fibre reinforcement (pp. 8 - 13) The strengthening of concrete structures using externally bonded carbon fibre rein- forcement has grown in popularity very quickly since the beginning of the nineteen- nineties. The reasons for this include the many investigations conducted in other countries and the availability of design guidelines. The effect of temperature on the reinforcement is an aspect that only received limited attention until recently. Research at Eindhoven University of Technology has cre- ated greater clarity about this. Frameworks stiffened by glass (pp. 14 - 18) Glass plates can withstand longitudinal loads, and in a structure they can replace the function of stability struts behind a glass fa?ade. A stability system consisting of a steel framework, a single glass plate and three different glued seam types has been investigated at Eindhoven University of Tech- nology. The investigation involved experi- ments, finite element simulations, parameter studies and the development of mechanical models. Semi-integral frameworks (pp. 19 - 23) There are no calculation rules that enable the practical application of semi-integral frame- works (steel frameworks stabilised with dis- crete-linked precast concrete panels). Knowl- edge about the behaviour of this type of structure is moreover insufficient. Research was conducted at Eindhoven University of Technology in order to make it possible to give scientific underpinning to the develop- ment of calculation rules for the lateral behaviour of semi-integral frameworks. For that purpose, this type of structure was sub- jected to experimental, numerical and ana- lytical investigation. Cracking in hardening concrete (pp. 24 - 27) Concrete is a very complex material. This emerges, among other things, when examin- ing the strength development in concrete. After many years of research it is possible to predict the strength and stiffness of hard- ened concrete with sufficient confidence. However, predicting the stresses and the probability of cracking in hardening concrete is a lot more difficult. A better understanding of these problems has been acquired thanks to recent research into models at a micro scale at Delft University of Technology. Speed of Portland cement (pp. 28 - 32) Why doesn't concrete set in the mixer? In a nutshell this is the main theme of doctoral research carried out at Delft University of Technology over the last four years. We don't have all the answers yet, but we've come a long way. The workability of masonry mortar (pp. 34 - 37) The workability of masonry mortar is a com- plex phenomenon which has parallels with the workability of fresh concrete. Yet it also has its own particular problems as a result of the different composition of the mortar, the importance of the tradesman's craftsman- ship and the bricklaying process. Doctoral research on this subject was conducted at the Catholic University of Louvain from 2005 to 2009. Rheology of self-compacting concrete (pp. 38 - 44) Numerical flow models have to be utilised in order to make the best possible use of highly fluid concrete mixtures, such as self-com- pacting concrete (SCC). Numerical simula- tions of the pouring process make it possible to determine the minimum workability of the fresh concrete such that the formwork can be filled satisfactorily. Doctoral research is currently being done on this subject at the Catholic University of Louvain. This article discusses the flow behaviour of SCC in broad-brush terms. Outside the theme South Africa ready for the World Cup (pp. 54 - 59) The football World Cup will be held in South Africa this summer. A total of ten stadiums are needed. Six existing stadiums will be radically renovated and four completely new ones will be built. BAM is one of the parties responsible for the execution of two of them. Cable-stayed structure halves span (pp. 60 - 65) The Muider Bridge is 300 m long, made from steel and near Amsterdam. It permits the A1 motorway to cross the Amsterdam-Rhine Canal. It was built in 1969/1970. The bridge is now being strengthened, widened and raised in connection with the construction of extra rush hour lanes. This project is the sub- ject of three articles. The first gives an intro- duction and an explanation of how the bridge will be jacked up. The second article discusses the pylons and the third article addresses the push beams and the support beam. Meerhoven structures (pp. 66 - 71) The Meerhoven district is the newest major expansion of Eindhoven. Multi-level intersec- tions have been selected for the access roads. Two beautiful structures have been built using sophisticated technology, materi- als knowledge and execution - the Spotter- shill viaduct and the Oersebaan underpass. This article gives an impression of the styling and the structural design. Concrete with a roughened surface (pp. 72 - 74) The`B?rgerhaus'plays an important role in the public life of Poing, a rural village near Munich. Stuttgart-based architects Bez + Kock therefore designed a solid jewel with a polygonal footprint for the new village cen- tre. The building, made entirely from decora- tive concrete, has given this small commu- nity an extra attraction. Permit in a single day? (pp. 76 - 79) Transactions, tax returns, correspondence as well as drawings and project specifications are currently virtually all electronic. But applying for building permits is still done on paper. Is there another way for this too? Safety when using underground space (pp. 80 - 85) The thesis`Physical Safety in Multiple Use of Space'addresses the physical safety aspects of multiple use of space. Among other things this involved the scientific investigation of the interaction between internal and exter- nal safety in regard to construction above existing structures. In this article the relation- ship between internal and external safety when using underground space is discussed. The issue of fire safety in covered over spaces is also presented. If you would like an entire article from Cement translated, why not let us arrange it for you? Prices start from 100 per page (actual price on request). We can supply either bare text or a pro- fessionally laid out article. For more information please contact ?neas, 0411 65 00 85, lezersservice@aeneas.nl summary