Abstract: Sustainable development as the leading civilization idea, and nanotechnology as the contemporary wave of technology significantly affecting the society, are brought together in this paper. A brief history of sustainability implementation from the start concept until European Construction Product Regulation is presented. The extended definitions of sustainable construction and sustainable material are analysed with adequate conclusions towards Concrete. The category of Exergy is implemented as a measure for “natural environmentally-friendly” meaning. The generalised concrete development curve is presented with discussion of Well Defined Concrete Performance. The statement that the sustainability is necessity for concrete and the nanotechnology is the chance for the future of concrete polymer composite is the final conclusion of the paper.
Abstract: Synergetic actions between cement and polymer provide performance improvement and a wide range of new and innovative properties and applications. Polymers can reduce the impact of construction industry on environment, by decreasing the carbon footprint of cement production. In such a way construction industry will be able to meet increasing demands of a growing world population. Renovation and restoration, largely figuring in the concept of sustainable construction development, thank their growing share in construction activity to the input of polymers in repair materials and rehabilitation procedures.
Abstract: Abstract: Polymer concrete and polymer-modified concrete have been widely used around the world since the 1970s. Polymer concrete has been used for repair of portland cement concrete, for overlays and for precast components. Polymer-modified concrete has been used extensively for overlays for bridges and parking facilities and as a thin spray-on mortar for exterior surfaces.
Abstract: The present paper reviews the recent trends in research and development activities of polymer-modified paste, mortar and concrete in the Japanese construction industry. In Japan, the active research and development of the polymer-modified paste, mortar and concrete have been carried out for the past about 50 years, and they are nowadays used as dominant construction materials in various applications because of their high performance, multifunctionality and sustainability compared to conventional cement paste, mortar and concrete. The recent research and development activities of the polymer-modified paste, mortar and concrete are concerned with repair, strengthening or retrofitting systems for deteriorated reinforced concrete structures, liquid-applied membrane waterproofing systems, high-grade redispersible polymer powders, intelligent repair materials, and reaction to fire as repair materials in building construction. Standardization work for the polymer-modified paste, mortar and concrete has been in progress in recent years, and useful national and institutional standards have been published till now.
Abstract: This study is designed to review the causes and modes of deterioration in irrigation aqueducts constructed with reinforced concrete, and introduce existing rehabilitation and new remodeling methods. As a result, because of the typical nature of irrigation aqueducts that are exposed to severe natural environment, the causes and modes of deterioration were more complex and diverse than other concrete structures. Also, due to the thinner cross sectional thickness of the structure, conducting a rehabilitation work was turned out to be difficult. As an active method for settling this problem, this study developed a method to remove the entire flume, upper structure of aqueduct, and replace with a precast flume constructed with polymer concrete. A loading test was performed using full-scale specimens, and then the suggested remodeling method was implemented in the actual field structures. The investigation showed that the suggested remodeling method was appropriate to secure the sustainability.
Abstract: The field of polymers in concrete is consolidated in the construction industry. The future of polymers in concrete is governed by the synergic interaction between these materials, in order to contribute significantly towards a more sustainable construction. Concrete-polymer composites (C-PC) have excellent mechanical and durability properties. Appropriate combination of polymers and classical construction materials provides opportunities for innovative applications and systems. This paper highlights the innovations and new approaches presented at the 13th International Congress on Polymers in Concrete in Madeira, Portugal, 2010 and at the 7th Asian Symposium on Polymers in Concrete in Istanbul, Turkey, 2012. The new trends presented are related with the micro and nanostructure, properties, test methods and applications of concrete-polymer composites.
Abstract: Polymer has been widely used in construction in China during the past few years and has become a necessary component of some building materials. The development in concrete-polymer composites (CPC) is going with the economical achievement and practical needs, which focuses on polymer-modified cement mortar (PCM). Therefore, this paper introduces the trends and advances in research on PCM during the past few years in China, especially cement hydration in the presence of polymer, the properties and application of PCM, waste utilization as well as trends of concrete-polymer composites.
Abstract: The aim of the paper is an attempt to prepare draft about the matrix: drivers and research area in the C-PC with an intension to identify future research needs and priorities with relevance to C-PC development. The approach adopted in the paper is limited to the two terms: “drivers” and “research area”. Drivers have been selected to the research areas defined on the base of the 14th ICPIC which reflect general scope of the C-PC domain. However, the identification and prioritization is not yet precise and do not define the result but try to establish the starting point. The purpose is that the paper is going to be used as a catalyst to guide discussion among the members of the C-PC community and to maximise the output in C-PC.
Abstract: Novel hybrid admixtures for construction applications were prepared by layer-by-layer deposition technique. Colloidal core templates consisting of styrene/n-butylacrylate latex particles were coated with multilayers of superplasticizers commonly used in concrete. This way, core-shell particles possessing both dispersing and film-forming properties were achieved. Incorporation of the latex@dispersant hybrid additive into a cement paste results in a slow release of the superplasticizer as a result of gradual shell disintegration which instigates prolonged plastification (long ”slump life”) of the cement slurry. Once the shell has been dissolved, latex particles are released into the pore solution and can coalesce into a polymer film which improves the mechanical properties of the hardened cement. Characterization of the templates and novel additives was performed by means of zeta potential measurement, dynamic light scattering and electron microscopy. Our method allows to synthesize multifunctional additives with time-controlled release effect.