Recent Trends in Research and Development Activities of Polymer-Modified Paste, Mortar and Concrete in Japan

2013 ◽  
Vol 687 ◽  
pp. 26-34 ◽  
Author(s):  
Yoshihiko Ohama ◽  
Ota Masahiro
Keyword(s):  
Research And Development ◽  
Construction Industry ◽  
High Performance ◽  
Construction Materials ◽  
Building Construction ◽  
High Grade ◽  
The Past ◽  
Repair Materials ◽  
Recent Trends ◽  
Active Research

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.

A benchmarking approach to the progress of green materials and systems’ use in the UAE construction industry

2016 ◽  
Vol 13 (4) ◽  
pp. 315-327 ◽  
Author(s):  
Aly Elgayar ◽  
Salwa Mamoun Beheiry ◽  
Alaa Jabbar ◽  
Hamad Al Ansari
Keyword(s):  
Construction Industry ◽  
United Arab Emirates ◽  
Design Methodology ◽  
Construction Materials ◽  
Relative Importance ◽  
Content Type ◽  
The Past ◽  
Green Materials ◽  
Importance Index ◽  
Regulatory Guidelines

Purpose Over the past decade, the United Arab Emirates (UAE) introduced several green regulatory guidelines, federal decrees, and a considerable number of environmentally friendly initiatives. Hence, the purpose of this paper is to investigate the top green materials and systems used currently in the UAE construction industry as per the new laws dictate as well as see if professionals are switching over to incorporate more green materials, systems, and/or designs. Design/methodology/approach The work involved reviewing internationally popular green materials and systems for construction, developing a questionnaire based on the literature review, surveying professionals in the seven UAE emirates, and ranking the findings based on the relative importance index. Findings Findings found the top used green materials and system in the UAE’s construction industry. As well as identified that there is a communication gap between the design and implementation phases that is possibly hindering the use of more green materials and systems. Originality/value This study sets a baseline to measure the UAE’s progress over the coming years in terms of integrating more green construction materials, systems, methodologies, and trends.

scholarly journals Bio-based construction materials for a sustainable future

2019 ◽  
Author(s):  
Rijk Block ◽  
Barbara Kuit ◽  
Torsten Schröder ◽  
Patrick Teuffel
Keyword(s):  
Construction Industry ◽  
Structural Engineering ◽  
Building Materials ◽  
Raw Materials ◽  
Construction Materials ◽  
Flax Fibres ◽  
The Past ◽  
Natural Building ◽  
Paris Climate Agreement ◽  
Primary Materials

<p>The structural engineering community has a strong responsibility to contribute to a more efficient use of natural resources. Nowadays the construction industry is by far the most resource intense industry sector, approximately 40-50% of all primary raw materials are used, which raises the question about the architects and engineer’s accountability. In this context and as a result of the Paris Climate agreement the Dutch government defined the program “Nederland Circulair in 2050”, which states the ambition to use 50% less primary materials in 2030 and to have a full circular economy in 2050.</p><p>One possible approach to achieve these ambitious goals is the application of renewable, bio-based materials in the built environment and to replace traditional, typically cement-based, materials. Already in the past natural building materials, such as timber and bamboo have been used widely, but in recent years new materials came up and provide new opportunities to be used in the construction industry. The authors explored various alternatives, such as hemp and flax fibres, mycelium and lignin-based fibres for composite materials, which will be described with various experimental and realised case studies.</p>

Concrete-Polymer Composites – The Past, Present and Future

2011 ◽  
Vol 466 ◽  
pp. 1-14 ◽  
Author(s):  
Yoshihiko Ohama
Keyword(s):  
Research And Development ◽  
Polymer Composites ◽  
Literature Survey ◽  
Future Trends ◽  
Process Technology ◽  
Development History ◽  
Sustainable Concrete ◽  
The Past ◽  
History Of ◽  
Recent Trends

The present paper deals with the principles of process technology for concrete-polymer composites, the research and development history of the concrete-polymer composites, the recent trends in the research and development of the concrete-polymer composites and the present status of major standardization work for the concrete-polymer composites, on the basis of comprehensive literature survey. The future trends in the research and development of the concrete-polymer composites are predicted, and sustainable concrete-polymer composites are proposed for the 21st century.

scholarly journals Development of a New Construction Research Model for Saudi Arabia

2020 ◽  
Vol 7 (1) ◽  
pp. 42
Author(s):  
Yasir Alhammadi ◽  
Dean Kashiwagi ◽  
Jacob Kashiwagi ◽  
Kenneth Sullivan
Keyword(s):  
Research And Development ◽  
Construction Industry ◽  
Action Plan ◽  
Development Program ◽  
Saudi Arabian ◽  
Poor Performance ◽  
Development Programs ◽  
The Past ◽  
New Construction ◽  
Management Project

The Saudi Arabian construction industry has had poor performance for the past thirty years. There have been many publications identifying the problem and potential causes. There have been no publications identifying what the source of the problem is, how to mitigate the problem, and actual testing to validate the proposed solution. This paper discusses why this problem exists, what is a potential solution, and an action plan that mirrors the most successful (construction management, risk management, project management and procurement delivery) research and development program in the world (22 years, $16M, +1750 tests, six different countries, 31 states in the U.S. and 98% customer satisfaction). The solution proposed in this paper is unique to the strengths and weaknesses of the research and development programs at universities in the Saudi Arabian kingdom.

The Use of High Performance Textiles in Construction Projects

2002 ◽  
Vol 31 (3) ◽  
pp. 205-217 ◽  
Author(s):  
Fred Isley
Keyword(s):  
Construction Industry ◽  
Textile Industry ◽  
Construction Projects ◽  
High Performance ◽  
Building Materials ◽  
Glass Fibers ◽  
High Strength ◽  
The Past ◽  
Textile Fabrics ◽  
Construction Trades

A niche in the textile industry provides high strength, high modulus textile fabrics to the construction industry as a potential replacement for more traditional building materials such as wood, concrete, masonry, and steel. The mechanical properties of fabrics made of aramid, carbon and glass fibers lend themselves to the needs of the design engineer by providing high strength to weight, high stiffness to weight and extreme flexibility in use and design. Combined with cross-linking resins systems to form a composite, the fabrics are being widely accepted by the civil engineers serving the construction trades Thousands of structures around the world have been repaired, retrofitted or built of such fabrics in the past 10 years.

Effect of Partial Substitution of Fine Aggregate with Copper Slag on Mechanical and Durability of High Performance Concrete-A Review

2020 ◽  
Vol 07 (01) ◽  
pp. 1-11
Author(s):  
Rizwan Ahmad Khan ◽  
Keyword(s):  
Construction Industry ◽  
High Performance ◽  
High Performance Concrete ◽  
Construction Materials ◽  
Copper Slag ◽  
Partial Substitution ◽  
Fine Aggregate ◽  
Natural Sand ◽  
Severe Problem ◽  
Fine Aggregates

The challenge before the construction industry is to meet the demand of the efficient and economically viable construction materials posed by the huge infrastructural needs. Many nations are observing an expeditious growth in the field of construction necessitating the utilization of natural reserves for the expansion of infrastructure. This expansion is giving a warning to available reserves of nature. The natural ingredients, fine aggregates and coarse aggregate constitute more than 70% volume of the concrete. The availability of these resources is decreasing at a very high pace. In fact due to the severe problem with the availability of natural sand, the construction industry is faced with the pressing need to consider available options to lessen the reliance on natural aggregates. Copper slag being a waste material, can be used as an option for fine aggregates. The substitution of fine aggregate from nature with waste materials from industries such as copper slag offers economic and technical dominance, which are of pronounced significance in the present scenario. This study is, based on the critical review of the development of High Performance Concrete (HPC) by replacing fine aggregate with copper slag by observing various other researches and reviews. The key intent of this paper is to closely look at the copper slag utility as an unconventional material to be used as a substitute of fine aggregate and its effect on mechanical and durability parameters of HPC.

scholarly journals Methods for creating CLT Construction Guidelines

2020 ◽  
Vol 172 ◽  
pp. 10005
Author(s):  
Simen Wahlstrøm
Keyword(s):  
Construction Industry ◽  
Science Communication ◽  
Research Community ◽  
Building Construction ◽  
Domestic Literature ◽  
The Past ◽  
Safety Design ◽  
Critical Feedback ◽  
Rational Production ◽  
Depth Interviews

During the past decade, the use of Cross-Laminated Timber (CLT) elements has become gradually more popular and widespread in building construction in Norway. A study mapping the experience of CLT use in the Norwegian construction industry reveals that existing domestic literature on this topic is outdated and no longer relevant. This paper describes the methods used for preparing updated CLT construction guidelines. Information obtained from expert actors in the construction industry, combined with document studies, has formed the knowledge basis for this study. A total of 19 qualitative in-depth interviews were conducted, and more than 400 documents from 12 CLT projects were received from 11 actors. A CLT construction guide focusing on moisture safety design and rational production was prepared based on the information obtained, and was quality assured by 16 experts from industry and the research community. Guidance on the approach to preparation of the guide, its format and layout, was provided by SINTEF Science Communication. Critical feedback influenced the content of the guide and its design recommendations. The study shows that dialogue with the construction industry and research community is a valuable contribution to the preparation of structured construction solutions. The involvement of the industry has accentuated the importance of the preparation of CLT construction guidelines. It is hoped that the guide will inspire research institutions to prepare and publish updated guidelines.

The Discussion on the Application of the Electrical Construction Technology of Prefabricated Buildings

2020 ◽  
Vol 9 (4) ◽  
pp. 180
Author(s):  
Guoxiu Cao
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
High Energy ◽  
Building Construction ◽  
Lightning Protection ◽  
Construction Technology ◽  
Engineering Construction ◽  
The Past ◽  
Construction Techniques ◽  
High Energy Consumption

The acceleration of the development of economy and the construction of urbanization has promoted the development of the construction industry, and the construction technology of various construction projects has been continuously innovated. In the past, the building construction often suffered from disadvantages such as high energy consumption and generating large amounts of garbage. Modern construction techniques are actively improving these problems. Prefabricated construction techniques are widely used in the building construction, such as electrical pipeline construction, which makes electrical engineering construction more convenient and environmentally friendly. This paper mainly discusses the construction application of prefabricated electricity in the construction from the aspects of pipeline embedment, lightning protection grounding, the position of electric boxes and so on.

Reuse of Building Construction and Demolition Waste, a Xi’an Example

2011 ◽  
Vol 243-249 ◽  
pp. 6257-6260
Author(s):  
Qiang Du ◽  
Lei Zhao ◽  
Rui Yang
Keyword(s):  
Construction Industry ◽  
Building Construction ◽  
Construction And Demolition Waste ◽  
Major Type ◽  
Demolition Waste ◽  
Efficient Manner ◽  
The Past ◽  
And Control ◽  
Xi’An City ◽  
Made In

In China, the construction industry has been developing rapidly over the past decades, at the same time, generating a huge amount of construction and demolition waste (CDW). The stream of CDW must be dealt with special attention, at least because of the shortage of landfill space for disposal and the need of sustainable development. This paper presents solutions to manage and control major type of building CDW in a technically feasible and economically efficient manner, with an example of Xi’an City. Recommendations are made in order to promote sustainable CDW management in practice.

scholarly journals The Discussion on the Application of the Electrical Construction Technology of Prefabricated Buildings

2020 ◽  
Vol 9 (5) ◽  
pp. 21
Author(s):  
Guoxiu Cao
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
High Energy ◽  
Building Construction ◽  
Lightning Protection ◽  
Construction Technology ◽  
Engineering Construction ◽  
The Past ◽  
Construction Techniques ◽  
High Energy Consumption

The acceleration of the development of economy and the construction of urbanization has promoted the development of the construction industry, and the construction technology of various construction projects has been continuously innovated. In the past, the building construction often suffered from disadvantages such as high energy consumption and generating large amounts of garbage. Modern construction techniques are actively improving these problems. Prefabricated construction techniques are widely used in the building construction, such as electrical pipeline construction, which makes electrical engineering construction more convenient and environmentally friendly. This paper mainly discusses the construction application of prefabricated electricity in the construction from the aspects of pipeline embedment, lightning protection grounding, the position of electric boxes and so on.

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