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2 edition of Short-term creep of concrete at elevated temperatures found in the catalog.

Short-term creep of concrete at elevated temperatures

M. Gillen

Short-term creep of concrete at elevated temperatures

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Published by The Center in Washington, D.C .
Written in English

    Subjects:
  • Concrete -- Effect of temperature on.

  • Edition Notes

    StatementM. Gillen ; sponsored by U.S. Department of Commerce, National Bureau of Standards, Center for Fire Research.
    SeriesNBS-GCR -- 82-407.
    ContributionsConstruction Technology Laboratories (Portland Cement Association), Center for Fire Research (U.S.)
    The Physical Object
    Paginationx, 99 p. :
    Number of Pages99
    ID Numbers
    Open LibraryOL17549689M


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Short-term creep of concrete at elevated temperatures by M. Gillen Download PDF EPUB FB2

Get this from a library. Short-term creep of concrete at elevated temperatures. [M Gillen; Construction Technology Laboratories (Portland Cement Association); Center for Fire Research (U.S.)]. While creep in metallic materials occurs only at elevated temperatures, creep of thermoplastics can be significant at any tem- perature [1].

In addition, fatigue behavior of thermoplastic. Inst. Proc 57 Feb. 2 T. Harmathy, and J. Berndt Hydrated Portland cement and lightweight concrete at elevated temperatures J.

Concr. Inst. Proc. 63 Jan. 3 A. Ross Short-term and long-term deformations of concrete as influenced by its physical structure and state Int. Conf. Struct. Concr. Behaviour under Load. "Long Term Durability of Structural Materials" features proceedings of the workshop held at Berkeley, CA in October, It brought together engineers and scientists, who have received grants from the initiative NSFto share their results on the study of long-term durability of materials and structures.

Available in the National Library of Australia collection. Author: Neville, Adam M; Format: Book; xix, p. 23 cm. @article{osti_, title = {Effects of long-term exposure to elevated temperature on the mechanical properties of Hanford concrete}, author = {DeFigh-Price, C}, abstractNote = {This report describes results of a 5-year testing program to determine the effects of long-term exposure to elevated temperatures on the mechanical properties of concrete used in constructing Hanford radioactive UGS.

Creep of Heat-cured High-Performance Concrete Subjected to Freezing or Elevated Temperatures Persson, Bertil LU () p Mark; Abstract This article outlines an experimental and numerical study of the short-term creep of High-Performance Concrete, HPC, with sealed curing and temperature under freezing point, which is compared with the creep of HPC at normal and elevated temperatures.

A long-term creep compliance curve was constructed using the creep compliance curves of short-term creep tests performed at different temperatures. Based on the time-temperature analogy, a prediction was conducted using the results of short-term creep tests performed at 20C, 30C, and 40C to predict the long-term creep compliance at 20C [18,20].Cited by: 1.

Although there are already many creep models for concrete, lots of them are based on the normal temperature (20 or 23 degree C). Even though the influence of high temperature is considered in some studies, most of them are focused on the short-term creep strain under extremely high temperature.

Stress–strain relationship of concrete at elevated temperatures. The most substantial consequence of fire on a concrete slab is the stiffness and strength degradation which may lead to eventually collapse. It is important to study the concrete property changes according to Size: KB.

Laboratory tests to determine the effect of long-term elevated temperatures on the strength and elastic properties of concrete showed that the modulus of elasticity, compressive strength, and splitting tensile strength continued to decrease as a function of temperature; Poisson's ratio was relatively unchanged.

T his article addresses one of the most important yet least understood plastics failure mechanisms, creep rupture. Creep rupture occurs within plastic parts that are exposed to continuous stress over an extended period of time (Figure 1).Common design features that expose a plastic product to continuous stress, and thus are at risk of creep rupture, include.

The hyperbolic function (J)(t, tf) is given by III.3 where CJ>X, the creep coefficient, is given by (3,i = a coefficient for the age of the concrete /' when load is applied III.3a (3H = a coefficient to estimate the relative humidity H III.3b j3d = a coefficient for the average thickness of the concrete member III.3c for This paper aims at presenting the effects of short-term sustained load and temperature on time-dependent deformation of carbon fiber-reinforced polymer (CFRP) bonded to concrete and pull-off strength at room temperature after the sustained loading period.

The approach involves experimental and numerical analysis. Single-lap shear specimens were used to evaluate temperature and short-term Cited by: 6.

Burke et al. [] studied the effects of sustained loads and elevated temperatures on FRP-strengthened concrete exposure temperatures were set at °C and °C. The mid-span tensile strain was sustained between 40% and 60% of ultimate tensile strength until failure by: 7.

AASHTO can either (1) choose to require manufac- turers to qualify their products under an AASHTO SvTTF Adhesive Lower Bound Creep Displacement/ Average Short-Term Displacement Lower Bound Creep Displacement/ Average Limiting Displacement A B C Notes: Based on a K value (5% probability of nonexceedence with a confidence.

Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep.

The density of concrete varies, but is around 2, kilograms per cubic metre ( lb/cu ft). Unfortunately, this book can't be printed from the OpenBook.

If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF.

Below is the uncorrected machine-read text. Creep Properties of ASTM A Steel at Elevated Temperatures (English) Creep Properties of ASTM A Steel at Elevated Temperatures Author / Creator: Research on Short Term Flexural Stiffness of Concrete Beams with High Strength Steel Bars.

Zhou, J.M. / Chen, S. / Wang. An experimental investigation into the behavior of concrete elements retrofitted with NSM composite strips at elevated temperatures, American Concrete Institute (ACI) Special Publication on Advanced Materials and Sensors toward Smart Concrete Bridges: Concept, Performance, Evaluation, and.

The creep occurs at a rate that can be detrimental to the lifespan of concrete structures and structures on clay foundations (Bažant et al. ; Puzrin et al. Cementitious and clay-based materials have in common the fact that the phase that confers to them most.

At high temperatures (≥ T M) power-law creep may be accompanied by repeated waves recrystal­lization as shown in Fig. (Hardwick et al., [36]; Nicholls and McCormick, [37]; Hardwick and Tegart, [38]; Stūwe, [39]; Jonas et al., [33]; Luton and Sellars, [40]).

Each wave removes or drastically changes the. Concrete degradation may have various te can be damaged by fire, aggregate expansion, sea water effects, bacterial corrosion, calcium leaching, physical damage and chemical damage (from carbonatation, chlorides, sulfates and non-distilled water).This process adversely affects concrete exposed to these damaging stimuli.

In creep ductile materials, where creep strains dominate and creep crack growth is accompanied by substantial time-dependent creep strains at the crack tip, the crack growth rate is correlated by the steady state definitions of C t or C*(t), defined as C* (see ).

In creep-brittle materials, creep crack growth occurs at low creep ductility. The detrimental effects of hardening in asphalt pavements were first recognized by pioneering pavement engineers in the s and have been studied extensively during the last 70 years.

This hardening process, referred to as asphalt aging, is generally defined as change in the rheological properties of asphalt binders/mixtures due to changes in chemical composition during construction and its Cited by: Creep and Hygrothermal Effects in Concrete Structures Zdeněk P.

Bažant, Milan Jirásek (auth.) This comprehensive treatise covers in detail practical methods of analysis as well as advanced mathematical models for structures highly sensitive to creep and shrinkage.

Hurst & Neville I) as a supplement to a book (Neville I). Finally, I should like to thank the organizers of the meeting for the opportunity they gave me to look at other materials.

I am sure this is good for all of us. References Hirst, G. & Neville, A. Activation energy of creep of concrete under short-term static and cyclic. Full text of "Deterioration and REPAir of above Ground Concrete Water Tanks in Ontario, Canada" See other formats.

2) 78 Design of High Strength Steel Reinforced Concrete Columns Table Reduction factors for stress-strain relationships of cold-worked reinforcing steel at elevated temperatures Temperature (°C) — £ s yE s kp,e — fsp,l/fsy kj-T 5s II =35 -it 20 0.

Recycled Asphalt Pavement and Crushed Concrete Backfill: State-of-the-Art Review and Material Characterization 5. Date temperatures (°F) resulted in more creep in the recycled mixture than in the virgin particularly at elevated Size: 7MB.

Corrosion risks and selection of stainless steel grades for short-term service in molten aluminium, copper, lead, tin and zinc are discussed. Maximum service temperatures in air for stainless steels. Stainless steels are widely used for their good oxidation resistance at elevated temperatures.

C/CM Standard Test Method for Creep of Concrete in Compression. C Standard Test Method for Dead Load Resistance of a Sealant in Elevated Temperatures. D Standard Guide for Developing and Implementing Short-Term Measures or Early Actions for Site Remediation. advanced technical ceramics - thermomechanical properties of monolithic ceramics - part 4: determination of flexural creep deformation at elevated temperatures: 16/ dc: 0: bs iso - fine ceramics (advanced ceramics, advanced technical ceramics) - test method for determining elastic modulus and strength of thick ceramic coating.

Alter about six monlhs under load, the rate of creep of epoiy concretc decreases considerably so tha1. at one year, the crecp of lean epoxy mixes is approximatly tlre same as that of sealed cemenl concrete specimens under the samc stress On the basis ol stressbtrength ratio, ho\rever, epoxy concrete exhibits creep about thrc limes 1/5(1).

Reinforced Concrete Design WITH FRP Composites DK_Cfm Page ii Wednesday, Octo PM DK_Cfm Page iii Wednesday, Octo PM. Based on the short-term test results, the dominant degradation mechanism for GFRP bars in concrete was found as the deterioration of fiber/matrix interface. A degradation model based on Arrhenius concept and prediction procedures are given, and correlations with other studies and field data are by: Similar results have been recorded with density of circa kg/m3 for pastes and kg/m3 for mixtures containing coarse aggregates (Ref ).

Long-Term Properties of Geopolymer Concrete: Creep and Drying Shrinkage The creep and drying shrinkage behavior of heat-cured low-calcium fly ash-based geopolymer concrete was studied for a. Warmer temperatures in the summer months increase the rate of deposition of tufa, whereas cold temperatures in the winter months cause the carbon dioxide to remain in solution.

The preceding chemical reactions clearly indicate that the concentration of water, carbon dioxide, temperature,File Size: 4MB. C(): Standard Test Method for Modulus of Rupture of Carbon-Containing Refractory Materials at Elevated Temperatures.

Ca(): Standard Test Method for Length Change of Concrete Due to Alkali-Carbonate Rock Reaction. Providing detailed information, this book helps engineers to rationally predict the time-varying deformation of concrete structures under typical in-service conditions.

It gives analytical methods to help anticipate time-dependent cracking, the gradual change in tension stiffening with time, creep induced deformations and the load independent.