cracking tendency of lightweight concrete

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CRACKING TENDENCY OF LIGHTWEIGHT CONCRETE

structure. In this project, the effect of using lightweight aggregate on the cracking tendency of bridge deck concrete was evaluated by cracking frame testing techniques. Cracking frames measure the development of stresses due to thermal and autogenous shrinkage effects from setting until the onset of cracking.

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Cracking Tendency of Lightweight Concrete in Bridge Deck ...

Feb 24, 2010  Cracking Tendency of Lightweight Concrete in Bridge Deck Applications Cracking of hardening concrete occurs when the induced tensile stress exceeds the tensile strength of the concrete. The development of in-place stresses is affected by the shrinkage, coefficient of thermal expansion, setting characteristics, restraint conditions, stress ...

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Cracking Tendency of High Strength Lightweight Aggregate ...

Jun 01, 1998  Title: Cracking Tendency of High Strength Lightweight Aggregate Concrete at Early Ages Author(s): T .A . Hammer , O. Bjontegaard and E. J. Sellevold. Publication: Symposium Paper Volume: 179 Issue: Appears on pages(s): 53-64 Keywords: aggregates; cracking (fracturing) high-strength concrete; strains; stresses Date: 6/1/1998 Abstract: The use of high strength normal weight

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Cracking Tendency of Lightweight Aggregate Bridge Deck ...

Mar 01, 2014  Title: Cracking Tendency of Lightweight Aggregate Bridge Deck Concrete Author(s): Benjamin E. Byard, Anton K. Schindler, and Robert W. Barnes Publication: Materials Journal Volume: 111 Issue: 2 Appears on pages(s): 179-188 Keywords: Benjamin E. Byard, Anton K. Schindler, and Robert W. Barnes Date: 3/1/2014 Abstract: Early-age cracking in bridge decks is a severe problem

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Cracking Tendency of Lightweight Aggregate Bridge Deck ...

Cracking Tendency of Lightweight Aggregate Bridge Deck Concrete Early-age cracking in bridge decks is a severe problem that may reduce the functional life of the structure. In this project, the effect of using lightweight aggregate on the cracking tendency of bridge deck concrete was evaluated using testing frames that restrain movement due to ...

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Evaluation of Shrinkage-Cracking Characteristics of ...

Freeze-Thaw Durability of Lightweight Concrete," by C. N. Kanahar and ... indicate cracking tendency while water loss provided an indication of cracking tendency. iii . LIST OF FICllHES LIST OF TABLES CHAJYfEH ... 4-.1.8 Concrete Cracking ...

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Early-Age Cracking of Lightweight Mass Concrete

Jan 01, 2020  Concretes representative of mass concrete mixtures—namely, normal-weight concrete, internally cured concrete, sand-lightweight concrete, and all-lightweight concrete—at two different water-cementitious materials ratios (0.38 and 0.45) were tested in cracking frames from the time of setting until the onset of cracking.

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Cracking Tendency of Lightweight Aggregate Bridge Deck ...

Cracking Tendency of Lightweight Aggregate Bridge Deck Concrete Early-age cracking in bridge decks is a severe problem that may reduce the functional life of the structure. In this project, the effect of using lightweight aggregate on the cracking tendency of bridge deck concrete was evaluated using testing frames that restrain movement due to ...

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Effect of Lightweight Aggregate on Early-Age Cracking of ...

Early-age cracking in mass concrete structures is a severe problem which could lead to long-term serviceability related problems in the structure. In this dissertation, the effect of using lightweight aggregates (LWAs) on the early-age cracking tendency of mass concrete was evaluated.

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Evaluation of Shrinkage-Cracking Characteristics of ...

Freeze-Thaw Durability of Lightweight Concrete," by C. N. Kanahar and ... indicate cracking tendency while water loss provided an indication of cracking tendency. iii . LIST OF FICllHES LIST OF TABLES CHAJYfEH ... 4-.1.8 Concrete Cracking ...

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Field-Observed Cracking of Paired Lightweight and ...

Abstract: Research has suggested that conventional lightweight concrete can offer durability advantages due to reduced cracking tendency. Although a number of publications exist providing the results of laboratory-based studies on the durability performance of lightweight concrete (with lightweight coarse aggregate) and internally cured ...

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Structural Lightweight Concrete Latest Papers - ESCSI

Cracking Tendency of Lightweight Concrete (December 2010) This report presents the results of the cracking tendency of lightweight concrete performed by the Highway Research Center at Auburn University’s College of Engineering. Concrete Drying Times for Normal Weight and Lightweight Concrete in Real World Applications ...

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Early-Age Cracking of Lightweight Mass Concrete - GCO Portal

Feb 19, 2020  In this project, the effect of using lightweight aggregate (expanded slate) on the early-age cracking tendency of mass concrete mixtures was evaluated. Concretes representative of mass concrete mixtures—namely, normal-weight concrete, internally cured concrete, sand-lightweight concrete, and all-lightweight concrete—at two different water ...

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(PDF) Internal Curing of Concrete Using Lightweight Aggregate

In this project, the effect of using lightweight aggregate on the cracking tendency of bridge deck concrete was evaluated using testing frames that restrain movement due to volume change effects ...

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INCREASE SERVICE LIFE OF CONCRETE STRUCTURES WITH ...

using lightweight aggregate on the cracking tendency and autogenous shrinkage of concrete (6): The use of pre-wetted lightweight aggregates in concrete can reduce or eliminate the stress development caused by autogenous shrinkage. The decrease in autogenous stresses is due to

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Influence of mixture composition on shrinkage cracking of ...

Jan 01, 2012  The investigated concrete mixtures were prepared with Portland cement CEM I 42.5R (European Standard EN 197-1:2000), fly ash, silica fume, Sika Viscocrete 3 superplasticizer and lightweight aggregate Pollytag size of 0-4 mm and 4-8 mm, natural sand 0-2 mm and natural granite coarse aggregate size 2-8 mm. Pollytag is a lightweight aggregate obtained by sintering fly ash in

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COMPARATIVE BETWEEN LIGHTWEIGHT CONCRETE TRADITIONAL ...

Sep 08, 2017  Lightweight concrete was used, throughout time, on different applications, for example naval construction. But today this material is used in all kinds of structures as bridges; buildings, oil. Platforms, among others. The usage of lightweight concrete goes beyond structural function.

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Internal Curing with Lightweight Aggregate

Sep 15, 2016  The addition of lightweight aggregate to a mix for internal curing will reduce the density of the concrete, but that is not the main goal. However, for precast products, weight reduction is an important benefit. Any concrete mixture that contains lightweight aggregate provides internal curing if the aggregate has been prewetted prior to batching.

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Using Prewetted Lightweight Aggregates

Cracking Tendency of Lightweight Concrete, Research Report. Auburn University: Highway Research Center. Castro, J. (2011). Moisture Transport in Cement-Based Materials: Application to Transport Tests and Internal Curing, Ph.D. Thesis. West Lafayette: Purdue University.

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Internal Curing of Concrete (Information Sources)

Cusson, D., and Hoogeveen, T., Internal Curing of High-Performance Concrete with Pre-Soaked Fine Lightweight Aggregate for Prevention of Autogenous Shrinkage Cracking , Cement and Concrete Research , 38 , 757-765, 2008. Cusson, D., and Margeson, J., Development of Low-Shrinkage High-Performance Concrete with Improved Durability , In Concrete ...

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"6 Field-Observed Cracking of Paired Lightweight and ...

Research has suggested that conventional lightweight concrete can offer durability advantages due to reduced cracking tendency. Although a number of publications exist providing the results of laboratory-based studies on the durability performance of lightweight concrete (with lightweight coarse aggregate) and internally cured concrete (using prewetted lightweight fine aggregate), far fewer ...

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Early-Age Cracking of Lightweight Mass Concrete - GCO Portal

Feb 19, 2020  In this project, the effect of using lightweight aggregate (expanded slate) on the early-age cracking tendency of mass concrete mixtures was evaluated. Concretes representative of mass concrete mixtures—namely, normal-weight concrete, internally cured concrete, sand-lightweight concrete, and all-lightweight concrete—at two different water ...

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Early-Age Cracking Tendency and Ultimate Degree of ...

Aug 08, 2012  Early-age cracking in bridge decks is a severe problem that may reduce functional life of the structure. The effect of lightweight fine aggregate on the cracking tendency of bridge deck concrete was evaluated using cracking-frame testing techniques.

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Experimental study on early cracking sensitivity of ...

Apr 01, 2017  The effects of different ceramsite, replacement rates of aggregates and expansive agent on the cracking sensitivity of lightweight aggregate concrete, as well as the effect of moisture content of aggregates in concrete (1 m 3) on tensile stress (72 h) due to restraint were discussed. 2. Experimental scheme2.1. Materials

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Lightweight Concrete for Accelerated Bridge Construction

Jul 14, 2011  Concrete Cracking Tendency Tests •Research at Auburn Univ. for ESCSI •Testing uses cracking tendency frames –Restrained shrinkage tests –Concrete temperature is controlled –3 types of LWA; 3 LWC mixes + NWC control

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Influence of mixture composition on shrinkage cracking of ...

Jan 01, 2012  The investigated concrete mixtures were prepared with Portland cement CEM I 42.5R (European Standard EN 197-1:2000), fly ash, silica fume, Sika Viscocrete 3 superplasticizer and lightweight aggregate Pollytag size of 0-4 mm and 4-8 mm, natural sand 0-2 mm and natural granite coarse aggregate size 2-8 mm. Pollytag is a lightweight aggregate obtained by sintering fly ash in

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Structural Lightweight Concrete — What, why, how ...

Structural lightweight concrete has an in-place density (unit weight) on the order of 90 to 115 lb/ ft3 (1440 to 1840 kg/m3) compared to normalweight concrete with a density in the range of 140 to 150 lb/ ft3 (2240 to 2400 kg/m3). For structural applications the concrete strength should

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Lightweight Concrete - What Is Lightweight Concrete And ...

The light-weight concrete density is less because lightweight coarse aggregates and sometimes lightweight fine aggregates are used, which make the concrete weigh less. The lightweight aggregates used are usually expanded shale, clay, or slate materials that have been fired in a rotary kiln to give them a porous structure, similar to volcanic rock.

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COMPARATIVE BETWEEN LIGHTWEIGHT CONCRETE TRADITIONAL ...

Sep 08, 2017  Lightweight concrete was used, throughout time, on different applications, for example naval construction. But today this material is used in all kinds of structures as bridges; buildings, oil. Platforms, among others. The usage of lightweight concrete goes beyond structural function.

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刘亚林 LIU Yalin - 刘亚林 – 魏亚的实验室

The Expanded Shale, Clay, and Slate Institute, USA. Effect of lightweight aggregate on the cracking tendency of mass concrete. Alabama Department of Transportation, USA. Temperature control requirements for the construction of mass concrete members

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Using Prewetted Lightweight Aggregates

Cracking Tendency of Lightweight Concrete, Research Report. Auburn University: Highway Research Center. Castro, J. (2011). Moisture Transport in Cement-Based Materials: Application to Transport Tests and Internal Curing, Ph.D. Thesis. West Lafayette: Purdue University.

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Internal Curing of Concrete (Information Sources)

Cusson, D., and Hoogeveen, T., Internal Curing of High-Performance Concrete with Pre-Soaked Fine Lightweight Aggregate for Prevention of Autogenous Shrinkage Cracking , Cement and Concrete Research , 38 , 757-765, 2008. Cusson, D., and Margeson, J., Development of Low-Shrinkage High-Performance Concrete with Improved Durability , In Concrete ...

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RNA Search Projects - Durability of Light Weight Concrete ...

Some research has suggested that use of lightweight concrete in bridge decks can offer advantages in addition to those directly related to the reduced weight. These possible advantages included reduced cracking tendency and lower permeability. If this is true, enhanced durability performance could result in lightweight concrete bridge decks ...

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Accelerating Bridge Construction with Prefabricated Bridge ...

Another benefit of lightweight concrete for bridges is that lightweight concrete provides enhanced durability compared to normal weight concrete. This is because lightweight concrete has been shown to have a reduced cracking tendency and reduced permeability.

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