Xem 1-20 trên 201 kết quả Construction materials
  • Data on the market share of the four major bridge construction materials used in the US (reinforced concrete, prestressed concrete, structural steel, and timber) are summarized in this report. All bridges carrying public roadways are considered. Data are extracted from the National Bridge Inventory (NBI) as of December 2003.

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  • .Application of Titanium Dioxide Photocatalysis to Construction Materials .RILEM STATE-OF-THE-ART REPORTS Volume 5 RILEM, The International Union of Laboratories and Experts in Construction Materials, Systems and Structures, founded in 1947, is a non-governmental scientific association whose goal is to contribute to progress in the construction sciences, techniques and industries, essentially by means of the communication it fosters between research and practice.

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  • Thermal Analysis is a well-established set of techniques for obtaining qualitative and quantitative information about the effects of various heat treatments on materials of all kinds, including new chemical compounds, plastics, ceramics, alloys, construction materials, minerals, foods and medicines. Heating is performed under strictly controlled conditions and can reveal changes in structure and other important properties of the material being studied. Such studies are of great practical importance in the use of materials....

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  • It is not like a skyscraper or huge bridges, sea dykes is thousands kilometer long, use billions cubic meter of construction materials. By saving a little unit cost of cross section, those can save huge money. In almost cases, local soil does not meet technical requirements to fill dyke body, as well as loading capacity of foundation. In some places, the height of dyke can not bigger 2m. That’s why apply advanced technologies in design and execution are very important to make a strong sea dyke in the manner of technique and financial.

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  • Concrete is an ancient material of construction, first used during the Roman Empire, which extended from about 20 B.C. to 200 A.D. The word concrete is derived from the Roman concretus, meaning to grow together. Although this early mixture was made with lime, cement, and a volcanic ash material called pozzolana, concrete today is a sophisticated material to which exotic constitutents can be added and, with computer-controlled batching, can produce a product capable of achieving 50,000 psi compressive strength....

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  • This handbook describes various welding materials and techniques available to the SEABEE welder. The emphasis is placed upon interchangeability of materials ordinarily found in the Naval Construction Forces Table of Allowance. Although complete coverage of all possible materials and their various applications is not furnished, the data provided in this handbook will cover a majority of maintenance situations. The referenced welding materials can be requisitioned from the supporting Construction Battalion Centers. This handbook also describes several related maintenance techniques.

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  • Good project management in construction must vigorously pursue the efficient utilization of labor material and equipment. Improvement of labor productivity should be a major and continual concern of those who are responsible for cost control of construted facilities...

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  • Language is a substantial barrier to safety and health for Hispanic construction workers in the United States. In recognition of this, The Center to Protect Workers Rights (CPWR), in cooperation with the Occupational Safety and Health Administration (OSHA), sponsored the development and presentation of 10-hour safety and health training in Spanish for residential construction.

    pdf29p baohan 17-06-2009 156 59   Download

  • Congratulations! You are about to embark on an adventure. This book is about the processes, the people, and the practices that we call construction management—a term and a profession that may be unfamiliar to many people. Construction, as most individuals understand it, is an activity or a series of activities that involves some craftspeople, building materials, tools, and equipment. But you will learn that there is a great deal more to it than that.

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  • We are living in a risky world, and it is getting riskier and riskier. As one of my fundamental claims that have been delivered to various audience including scho-lars, practitioners and government officers, first, risk avoidance system in today’s world is becoming so interconnected; second, it is fully supported by a great of risk issues that have been addressed in this edited volume.

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  • The ability to create intelligent machines has intrigued humans since ancient times, and today with the advent of the computer and 50 years of research into AI programming techniques, the dream of smart machines is becoming a reality. Researchers are creating systems, which can mimic human beings. Accurate mathematical models neither always exist nor can they be derived for all complex environments because the domain may not be thoroughly understood. The solution consists of constructing rules that apply when input values lie within certain designer-defined categories....

    pdf402p ktcn_1 10-07-2012 30 13   Download

  • Masonry Instant Answers addresses questions that arise at the job site during the course of masonry construction. Materials and installation issues are explained in an easily grasped format that is filled with tables and figures. Both industry recommendations and code requirements for masonry construction and inspection of the construction are presented in this text, which can be carried to the project site. Design issues, such as selection of materials or structural capacity of the masonry, are not discussed in this book since those topics are outside the scope.

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  • Through the efforts of a wide array of public and private organizations around the globe, a strong and growing movement is beginning the process of transforming the systems that create the built environment from ones that pay no attention to resources and the environment to a new variety in which these considerations are the pre-eminent criteria for “good” construction. Although dating back only to the early 1990s, there is already ample evidence that the “green building” movement is affecting the design, construction, operation, and disposal of the built environment....

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  • The rules established by the Committee are not to be interpreted as approving, recommending, or endorsing any pro-prietary or specific design, or as limiting in any way the manufacturer's freedom to choose any method of design or anyform of construction that conforms to the Code rules.

    pdf1002p kieuxuananh102 12-03-2015 18 10   Download

  • Many pavements, which are considered to be structurally sound after the construction of an overlay, prematurely exhibit a cracking pattern similar to that which existed in the underlying pavement. This propagation of an existing crack pattern, from discontinuities in the old pavement, into and through a new overlay is known as reflective cracking. Reflective cracks destroy surface continuity, decrease structural strength, and allow water to enter sublayers. Thus, the problems that weakened the old pavement are extended up into the new overlay.

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  • In this tutorial the sequence analysis for construction stage analysis is outlined. The example selected is a prestressed concrete box girder bridge (FCM) and the construction stage analysis is performed using the Wizard”.In the construction stage analysis the above construction sequences should be considered precisely. The construction stage analysis capability of MIDAS/Civil comprises an activate/deactivate concept of Structure Groups, Boundary Groups, and Load Groups. The analysis sequence of construction stage analysis for FCM is as follows:...

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  • This standard covers the design, construction, and location of liquefied petroleum gas (LPG) installations at marine and pipeline terminals, natural gas processing plants, refineries, petrochemical plants, or tank farms. This standard covers storage vessels, loading and unloading systems, piping, or and related equipment.

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  • Contents in this presentation 1. Background 2. Constructability and field performance 3. New pavement design models for reinforced asphalt 4. New material assessment methods for pavement design 5. Evaluation of reinforced asphalt products for a road application in NSW

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  • This Code contains mandatory requirements, specific prohibitions, and nonmandatory guidance for construction activ-ities and inservice inspection and testing activities.

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  • This Subsection contains requirements for the material, design, fabrication, examination, testing and overpressure protection of items which are intended to conform to the requirements for Class 1 construction.

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