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The city of lost cats
\"A stubborn young girl named Fiona stumbles upon an abandoned house full of stray cats, just as it is threatened by a demolition team, a leadership crisis, and two potentially malicious parakeets. Can Fiona save the house and all its inhabitants? A new middle-grade novel by critically acclaimed author Tanya Lloyd Kyi. When Fiona wanders into an abandoned mansion down by the harbor, she discovers the house is full of stray cats (and two chaotic parakeets). Fiona feels a great deal of sympathy for the animals; she understands what it's like to need a safe home. Ever since her parents died, she's been struggling to adjust to the tiny apartment where she and her Aunt Tanis now live. And Aunt Tanis has little time to spare for Fiona, between her job at The Municipal Hall and her horrible, hair-gelled boyfriend. When the mansion is threatened by a demolition team, Fiona is determined to save “The City” and its residents. But the cats have their own priorities. Cot (short for Cottonball Fluffikins Magnificent III, a name he refuses to acknowledge) has lived in the mansion for two years and is the self-proclaimed king. He's convinced the demolition effort has been organized by the recently arrived parakeets. Those birds have got to go! Cot's feline rival, Piper, is sure she can intimidate the demolition team and force them to leave, if Fiona will simply stay out of her way. And the parakeets . . . well, the parakeets just want to go home. As the demolition team begins tearing down the house next door, Fiona looks for any help she can find - at the library, the butcher shop, and even at The Municipal Hall. Can the efforts of one small girl and an assortment of animals stop a luxury condo development? Can they create something better in its place? It's going to take some quick thinking on the part of Fiona, not to mention the cooperation of all the cats, to give The City a future.\"-- Provided by publisher.
CHILDBOOK
Szemelvények a magyar közúti hídrobbantások történetéből: Prof. Dr. Lukács László 70. születésnapjára ajánlva
A hazai közúti h idak robbantásáról csak nagyon kevés publikációt találhatunk. A robbantással való rombolások végigkísérik a magyar hídtörténelmet. A leghíresebb magyar hidat, a Lánchidat már építés közben is kétszer fel akarták robbantani. Óriási károkat okozott a magyar hídállományban a második világháború is, amikor 1400 közúti hidat romboltak le. A hídrobbantások története részletes kutatásokat kíván, ehhez nyújt összefoglalót ez a tanulmány.
Journal Article
Építményszerkezetek robbantással történő ipari bontásának, katonai tönkretételének és bűnös szándékú rongálásának összehasonlítása
Az építmények és szerkezeti elemek robbantásánál nem releváns, hogy milyen robbanóanyagot vagy robbanás kiváltására alkalmas szerkezetet használunk, ha a cél a kijelölt objektum bontása, tönkretétele vagy szélsőséges esetben rombolása. Szinte mindenki tökéletesen el tudja különíteni az ipari robbantásos építménybontás, a katonai rombolás, illetve a bűnös szándékú sza botázsakciók eseménysorát. Abba azonban kevesen gondolnak bele, hogyha különböző szempontrendszerek szerint vizsgáljuk ezeket a tevékenységeket, akkor hasonlóságokat fedezhetünk fel. A hasonlóságokat összevetve pedig márkirajzolódik az a „szürke zóna \", amely alapján a jogszabályalkotók olyan előírások betartására kötelezik a robbantási szakterületek munkáltatóit, hogy a különböző kockázatotjelentő anyagok nyomon követhetőségét biztosítsák. Célul tűztükki, hogy megvizsgáljuk az ipari, katonai és terrorjellegű robbantásokat egy olyan szegmensben, ahol mindhárom tématerület érintett, mégis a legrelevánsabb feladatokat a polgári robbantási tevékenység képviseli.
Journal Article
Officials say Surfside, Fla., condo to be demolished
On July 4, Miami-Dade officials said that the partially collapsed Miami-area condo building would be demolished between 10 p.m. and 3 a.m. that night.
Streaming Video
Handbook of Recycled Concrete and Demolition Waste
The civil engineering sector accounts for a significant percentage of global material and energy consumption and is a major contributor of waste material.The ability to recycle and reuse concrete and demolition waste is critical to reducing environmental impacts in meeting national, regional and global environmental targets.
eBook
Circular Economy of Construction and Demolition Waste: A Literature Review on Lessons, Challenges, and Benefits
Conventionally, in a linear economy, C&D (Construction and Demolition) waste was considered as zero value materials, and, as a result of that, most C&D waste materials ended up in landfills. In recent years, with the increase in the awareness around sustainability and resource management, various countries have started to explore new models to minimize the use of limited resources which are currently overused, mismanaged, or quickly depleting. In this regard, the implementation of CE (Circular Economy) has emerged as a potential model to minimize the negative impact of C&D wastes on the environment. However, there are some challenges hindering a full transition to CE in the construction and demolition sectors. Therefore, this review paper aims to critically scrutinize different aspects of C&D waste and how CE can be integrated into construction projects. Reviewing of the literature revealed that the barriers in the implementation of CE in C&D waste sectors fall in five main domains, namely legal, technical, social, behavioral, and economic aspects. In this context, it was found that policy and governance, permits and specifications, technological limitation, quality and performance, knowledge and information, and, finally, the costs associated with the implementation of CE model at the early stage are the main barriers. In addition to these, from the contractors’ perspective, C&D waste dismantling, segregation, and on-site sorting, transportation, and local recovery processes are the main challenges at the start point for small-scale companies. To address the abovementioned challenges, and also to minimize the ambiguity of resulting outcomes by implementing CE in C&D waste sectors, there is an urgent need to introduce a global framework and a practicable pathway to allow companies to implement such models, regardless of their scale and location. Additionally, in this paper, recommendations on the direction for areas of future studies for a reduction in the environmental impacts have been provided. To structure an effective model approach, the future direction should be more focused on dismantling practices, hazardous material handling, quality control on waste acceptance, and material recovery processes, as well as a incentivization mechanism to promote ecological, economic, and social benefits of the CE for C&D sectors.
Journal Article
Advances in Concrete Demolition Technologies: A Review of Conventional and Emerging Methods for Sustainable Waste Management
The demolishing of concrete structures such as bridges, tunnels, buildings, and pavements has become a common activity due to reasons such as renovation, rehabilitation, retrofitting, or simply ending the service life of these structures. This upsurge has brought major challenges in managing construction demolition waste (CDW). Traditional demolition techniques are often characterized by high environmental impacts, inefficiency in waste management, and safety concerns. This paper critically reviews traditional and emerging concrete structure demolition technologies in terms of efficiency, safety, environmental impact, waste minimization, and material recyclability. A detailed review of manual demolition, mechanical demolition, implosion, and relatively new techniques such as static blasting, diamond wire sawing, soundless chemical demolition agents, hydro demolition, electrical discharge technology, demolition robots, and microwave heating is conducted. The key findings of this paper are that various alternative technologies have significant advantages over their traditional counterparts by offering minimum environmental pollution, improvements in on-site safety, and a possibility for materials to be reused and recycled. For instance, hydro demolition and diamond wire sawing are very efficient and accurate, meaning that actual waste management is highly improved. This paper underlines that the choice of demolition methods adapted to project needs is crucial for the development of sustainable CDW management. Such findings are useful to practitioners and policymakers who have to make fully informed decisions to promote environmental sustainability and resource conservation goals.
Journal Article
Numerical simulations of crack path control using soundless chemical demolition agents and estimation of required pressure for plain concrete demolition
In demolition process of large concrete structures, the non-explosive methods can be advantageous in reducing noise, vibration, and dust emission compared to the conventional explosive methods. One of the representative non-explosive methods is the injection of soundless chemical demolition agents (SCDAs) into the holes drilled in concrete structures and further expansion of the SCDAs. In the current paper, a computational framework was established and applied to simulate crack initiation and propagation caused by slow expansion of the SCDAs in plain concrete structures from a theoretical perspective. Using the concrete damaged plasticity model for semi-infinite structures, we first determined a proper domain size for the demolition simulation and then investigated a cost-effective spacing of the SCDA holes arranged horizontally or vertically. The interaction between the SCDAs was examined in terms of the minimum expansion pressure required to form cracks connecting the SCDAs. Furthermore, we found an equation for the minimum expansion pressure required to control a U-shaped crack path as a function of SCDA spacing and concrete compressive strength.
Journal Article