Development of New Construction Materials for Innovative Reactor Installation Designs

Atomic Energy ◽  
2021 ◽  
Author(s):  
A. B. Korostelev ◽  
S. V. Evropin ◽  
A. G. Derzhavin ◽  
I. V. Vershinin ◽  
O. V. Goslavskii ◽  
...  
2021 ◽  
Vol 42 ◽  
pp. 102471
Author(s):  
Ertugrul Erdogmus ◽  
Maria Harja ◽  
Osman Gencel ◽  
Mucahit Sutcu ◽  
Ali Yaras

2021 ◽  

Concrete is the most versatile, durable and reliable material and is the most used building material. It requires large amounts of Portland cement which has environmental problems associated with its production. Hence, an alternative concrete – geopolymer concrete is needed. The general aim of this book is to make significant contributions in understanding and deciphering the mechanisms of the realization of the alkali-activated fly ash-based geopolymer concrete and, at the same time, to present the main characteristics of the materials, components, as well as the influence that they have on the performance of the mechanical properties of the concrete. The book deals with in-depth research of the potential recovery of fly ash and using it as a raw material for the development of new construction materials, offering sustainable solutions to the construction industry.


2012 ◽  
Vol 204-208 ◽  
pp. 4119-4123
Author(s):  
Bo Wang ◽  
Ji Cheng ◽  
Xiao Han Zhang

New construction materials are the new generations of construction materials which are on the basis of the traditional construction materials, including the new wall materials, thermal insulation materials, water sealing materials, decoration materials and etc. New construction materials industry is developed with the deeply reforming and opening of China. This paper introduces the basic concepts and characters of the new construction materials, analyzes the development and application of the new construction materials, and then discusses countermeasures and suggestions of the development of the new construction materials.


Author(s):  
Jingqin Gao ◽  
Kaan Ozbay ◽  
Hani Nassif ◽  
Onur Kalan

The sustainability of transportation infrastructure depends on the adoption of new construction materials and technologies that can potentially improve performance and productivity. However, most agencies would like to evaluate these new materials and technologies at both the project and network levels before replacing the traditional ones. It also remains a challenge to reliably estimate the costs and lifetime performance of new construction materials and technologies because of limited implementation data. To address these issues, this paper presents a comprehensive bottom-up methodology based on Life Cycle Cost Analysis (LCCA) to integrate project- and network-level analysis that can fast-track the acceptance of new materials or technologies. Hypothesized improvement rates are applied to the deterioration functions of existing materials to represent the expected improved performance of a new material compared with a conventional material with relatively similar characteristics. This new approach with stochastic treatment allows us to probabilistically evaluate new materials with limited data for their future performance. Feasible maintenance and rehabilitation schedules are found for each facility at the project level and near-optimal investment strategies are identified at the network level by using a metaheuristic evolutionary algorithm while satisfying network-wide constraints. This provides an effective solution to many issues that have not been fully addressed in the past, including the trade-off between multiple objectives, effects of time, uncertainty, and outcome interpretation. A hypothetical bridge deck system from New Jersey’s bridge inventory database is used to demonstrate the applicability of the proposed methodology in constructing a planning and management decision-support procedure.


2014 ◽  
Vol 600 ◽  
pp. 166-174
Author(s):  
Liliana Fay ◽  
Paul Cooper ◽  
Luiz Henrique Lana ◽  
Danilo Pereira Souza

The growing industrialization of the construction materials, the evolution of the construction techniques and ease for conveyance, broadly speaking, eliminates the need to use local materials for construction. However, the earth still presents itself as a material with the potential to reintroduce the old and healthy construction habits, yet without precluding the search for technical innovations consistent with good environmental practices, and that may contribute to the formulation of simpler and cheaper processes. The current work developed the morphology of a new component of construction made with an easy acquisition and low cost material: soil-cement, a material and procedure proven, tested, and regulated. The redesign of a new construction component aims to facilitate the rise of the masonry through an innovative construction process, in which the settling mortar can be eliminated with a perfect fitting system. With the fitting block designed, the mould for pressing was then developed and prototypes were conformed, experimentally, in three soil-cement mixtures showing production feasibility. The prototypes were tested according to the related standards, being submitted to tests of resistance to compression, water absorption and sizing. The results showed that only the water absorption parameter did not comply with the standards and therefore must be targeted by future researches in order to improve the mixture composition.


2010 ◽  
Vol 654-656 ◽  
pp. 2644-2647 ◽  
Author(s):  
Joon Seok Park ◽  
In Kyu Kang ◽  
Jong Hwa Park ◽  
Joo Kyung Park ◽  
Hong Taek Kim ◽  
...  

In construction industries, new construction materials are needed to overcome some problems associated with the use of conventional construction materials due to the change of environmental and social requirements. Accordingly, the requirements to be satisfied in the design of civil engineering structures are diversified. As a new construction material in the civil engineering industries, fiber reinforced polymeric plastic (FRP) has a superior corrosion resistance, high specific strength/stiffness, etc. Therefore, such properties can be used to mitigate the problems associated with the use of conventional construction materials. Nowadays, new types of bridge piers and marine piles are being studied for new construction. They are made of concrete filled fiber reinforced polymeric plastic tubes (CFFT). In this paper, a new type of FRP-concrete composite pile which is composed of reinforced concrete filled FRP tube (RCFFT) is proposed to improve compressive strength as well as flexural strength of an RCFFT. The load carrying capacity of proposed RCFFT is discussed based on the result of experimental and analytical investigations.


2010 ◽  
Vol 636-637 ◽  
pp. 1222-1227 ◽  
Author(s):  
M. Frías ◽  
Olga Rodríguez ◽  
M.I. Sánchez de Rojas ◽  
S. Ferreiro ◽  
B. Nebreda ◽  
...  

This paper shows the possibility of reutilize paper sludge waste as supplementary cementing material for the cement manufacture. This industrial waste consists essentially of a mixture of organic matter (30%) and inorganic compound, such as calcite and clay minerals. The raw paper sludge does not present pozolanic properties, but once calcined at 650°C during 2 hours, exhibits a good pozolanic activity. Calcined paper sludge was used as partial Portland cement replacements of 0 and 10%. It was a sligth increment in compressive strength for 10 % of substitution from 7 days on. Furthermore, calcined paper sludge reduces the initial and final setting times of cement paste.


2013 ◽  
Vol 346 ◽  
pp. 15-21
Author(s):  
Vsévolod A. Mymrin ◽  
Rodrigo E. Catai ◽  
Elena V. Zelinskaya ◽  
Natalia A. Tolmacheva

This paper is devoted to the development of valuable new construction materials based on various ecologically burdensome galvanic wastes, namely industrial sludge from the RENAULT plant and metal cleaning glass waste. The only natural component used is local clay. Both of the wastes need significant financial investment and efforts for neutralization and subsequent disposal while they can be recycled into glass-ceramics or red ceramics (tiles, bricks, blocks, etc.). Mechanical properties of the ceramics of various compositions are as follows: flexion resistances are 4.8-9.2, 7.6-11.5 and 11.1-14.9 MPa (after calcination at 800°C, 850°C and 900°C, respectively); the dilatation coefficient values are normally 6.6 to 9.5% (up to 10% for certain materials); the water absorption values are between 19.7 and 23.9%. These values meet the Brazilian standards for ceramics production. Physicochemical interactions of initial components and new materials structure formation processes have been studied. The XRD data show the formation of new minerals in the process of baking: Na-Anortite (Ca,Na)(Si,Al)4O8, Thenardite Na2SO4, Mullite Al6Si2O13, Tamarugite NaAl (SO4)2 6H2O. Only two minerals are identified both before and after baking: Quartz SiO2 and Hematite Fe2O3. High X-ray background clearly visible on the XRD-pattern is an evidence of a highly amorphous glassy structure resulting from founding processes during the mixtures heating. The SEM and EDS studies of the ceramics strongly confirm the XRD results demonstrating fields of almost glassy morphology within the new material. These new-crystalline and new-amorphous structures can explain all the mechanical and chemical properties of the ceramic materials developed. Leaching and solubility studies of the new ceramics with Atom Absorption Analysis demonstrate that a great excess of heavy metals (Sn, Zn and Ni) from the industrial wastes is decreased in the baked ceramics achieving levels that meet Brazilian sanitary standards.


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