1 edition of Superplasticized concretes for rehabilitation of bridge decks and highway pavements found in the catalog.
Superplasticized concretes for rehabilitation of bridge decks and highway pavements
1981 by U.S. Dept. of Transportation, Research & Special Programs Administration, Office of University Research, National Technical Information Service [distributor in Washington, D.C, Springfield, Va .
Written in English
|Contributions||United States. Dept. of Transportation. Office of University Research., South Dakota School of Mines and Technology. Civil Engineering Dept.|
|The Physical Object|
|Pagination||xviii, 262 p. :|
|Number of Pages||262|
Compliance is mandatory! See the "Interim Revisions " section for a complete list of changes to each section. Water-Reducing Concrete Admixtures Water-reducing admixtures are chemical products that when added to concrete can create a desired slump at a lower water-cement ratio than what it is normally designed. The second phase extended the findings into an evaluation of superplasticized concrete containing steel fibers.
The bearing capacity calculation formula of the concrete-filled glass fiber reinforced gypsum wall panel is obtained by regression analysis, which provides reliable gist for structural design of concrete-filled glass fiber reinforced gypsum wall panel buildings. Zhang, Q. Fatigue equations of undamaged beams and sealed beams were developed based on the fatigue test results. Concrete Admixtures: Set-Retarding Set retarding concrete admixtures are used to delay the chemical reaction that takes place when the concrete starts the setting process.
The combining of fibers, often called hybridization is investigated in this paper for a very high strength concrete of an average compressive strength of MPa. Part III provides alternative methods for pavement rehabilitation with or without the addition of an overlay, and Part IV provides a framework for future developments using mechanistic design procedures. The basic property of the hybridized material that was evaluated and analyzed extensively was the modulus of rupture MOR and splitting tensile while the compressive strength was only slightly decreased compared to single steel fiber reinforced concrete. Specifically, this test method predicts the presence or absence of concrete or rebar deterioration at or above the level of the top layer of reinforcing bar. Specific precautionary statements are given in Section 5.
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In the past, data has been collected using the traditional methods of visual inspection supplemented by physical testing and coring. Department of Transportation has been completed at the South Dakota School of Mines and Technology to develop a tough, high-strength, high-density, durable concrete for bridge deck construction; and a medium-strength, flowing, structural concrete through the use of superplasticizers and steel fibers.
See the "Interim Revisions,and " sections for a complete list of changes to each section. It creates a cross-sectional image of the pavement subsurface — a pulse-echo technique that measures pavement layer thickness and a number of other bridge deck conditions.
Asphalt surfaces are also highly skid-resistant, providing a safe bridge deck surface. Recent advancements in admixture technology have led to the development of mid-range water reducers. Download preview PDF. DOI: Southeast university, Nanjing Google Scholar Copyright information. Liu, Z. In this book, the editors explain the concrete printing process for mix design and the fresh properties for the high-performance printing of concrete, along with commentary regarding their extrudability, workability and buildability.
Crews set the hoses at one-foot spacing to optimize curing.
Among the revisions are improved testing and acceptance criteria, updated material references, and recommended guidelines for construction loads. Monotonic and fatigue beam bending tests were also employed to assess the effects of different sealing techniques.
Bullard, D. As ofit will apply to all state bridges regardless of funding and to local bridges using federal funding. This book provides you with an all-inclusive guide that puts both the ADA Standards for Accessible Design, which governs construction and alteration of places of public use, together with the Department of Justice's Guidance on the Standards for Accessible Design, in one complete book.
The influence of strength of concrete, strength of steel bar, reinforcement ratio, span-depth ratio and stretching control stress on ratio of cracking bending moment and design bending moment of prestressed concrete hollow slab is discussed by numerical simulation.
Its steel box girder construction left foot-wide sections of the underside virtually exposed to frigid winter winds reaching 50 mph. Originally developed for geotechnical evaluations and mine detection, GPR was introduced for highway applications in the early s. Properties of 3D-printed fiber-reinforced Portland cement paste and its flexural and compressive strength, density and porosity and the 3D-printing of hierarchical materials is also covered.
Applications include the repair of highway pavements and bridge decks, airport runways, hydrotechnical structures, tunnels, and industrial flooring. The study has been completed and the significant results are presented in this paper. No other units of measurement are included in this standard.
An investigation sponsored by the U. The combining of fibers, often called hybridization is investigated in this paper for a very high strength concrete of an average compressive strength of MPa.
Consequently, this text supersedes all previous editions and interims. The results showed that: the compressive strength of concrete for single-doped fiber has little effect to improve concrete compressive strength, some even get lower,but mixing-doped coarse-fine fiber had increased 6.
Also, extracting cores and evaluating them at offsite laboratories is time consuming and costly. Methods of analysis other than those included in previous specifications and the modeling techniques inherent in them are included, and their use is encouraged.structural work and for c'onstruction of highway pavements and airport runways, and the latter (mix 33) will be suitable for bridge-deck overlays and for construction where high strength and highly im permeable concretes are needed.
Identical mixes were made in. Jun 01, · When traffic intensity on motorways exceeds more than 10 thousands heavy vehicles per day, it is clear that the concrete pavement is the most durable solution.
But on bridges and adjacent areas it is usually used asphalt pavement. Recent research shows that the change in surface skid resistance increases a risk of traffic accident in these sylvaindez.com: Bohuslav Slansky, Jiří Šrůtka.
Superplasticized concretes for rehabilitation of bridge decks and highway pavements: Authors: Ramakrishnan, V.; Coyle, W. V. one with medium workability and high cement content suitable for bridge deck replacement and another with high workability suitable for structural and pavement concrete were selected for intensive study.
For these. OKLAHOMA DEPARTMENT OF TRANSPORTATION SPECIAL PROVISION FOR PAVEMENT AND BRIDGE DECK SMOOTHNESS (ENGLISH AND METRIC) These Special Provisions amend and where in conflict, supersede applicable sections of the Standard Specifications for Highway Construction, English and Metric.
Units of measurement are. CONCRETE HIGHWAY BRIDGE DECK CONSTRUCTION R water-reducing and accelerating admixtures are also covered under ASTM C as Types D and E, respec- tively.
High-range water reducing (HRWR) and high- range,water-reducing and retarding admixtures are covered by ASTM CTypes F and G, respectively. SELECTION OF HIGH PERFORMANCE REPAIR MATERIALS FOR PAVEMENTS AND BRIDGE DECKS ALICE E. SOMMERVILLE ABSTRACT The Ohio Department of Transportation has identified the need to specify durable, more permanent high performing pavement and bridge deck patching materials.