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    Browsing ICAR Technical Reports by Title

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    Now showing items 1-20 of 38

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        Acceptability criteria for high fines content aggregate pavement layers 

        Ashtiani, Reza S.; Little, Dallas N. (2007-12-31)
        The objective of this study was to evaluate the impact of increasing fines content on the performance of unbound (unstabilized) and lightly stabilized aggregate systems. The aggregate systems analyzed varied in the amount ...
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        Adhesion in bitumen-aggregate systems and quantification of the effects of water on the adhesive bond 

        Hefer, Arno; Little, Dallas N. (2005-12)
        This research is intended to contribute toward the understanding, development, and implementation of a more fundamental design process for bituminous pavement materials, utilizing thermodynamic properties of the materials ...
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        Aggregates in Self-Consolidating Concrete 

        Koehler, Eric Patrick; Fowler, David W. (2007-03)
        Self-consolidating concrete (SCC) is an advanced type of concrete that can flow through intricate geometrical configurations under its own mass without vibration or segregation. A research project was conducted to investigate ...
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        Alkali-Silica Reaction in Portland Cement Concrete: Testing Methods and Mitigation Alternatives 

        Touma, Wissam; Fowler, David W.; Carrasquillo, Ramón L. (2001-07)
        Identifying the susceptibility of an aggregate to alkali-silica reaction (ASR) before using it in concrete is one of the most efficient practices for preventing damage and failure. Several tests have been developed for ...
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        Characterization of Unbound Granular Layers in Flexible Pavements 

        Adu-Osei, Alex (2001-12)
        The mathematical characterization of unbound granular materials should ideally be based on the behavior of the individual constituent elements and their interaction. Until particulate mechanics are developed to a level ...
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        Characterizing minus no. 200 fine aggregate for performance in concrete 

        Stewart, Jane; Norwell, Justin; Juenger, Maria C. G.; Fowler, David W. (2006-03)
        ASTM C 33 limits the amount of microfine aggregate smaller than 75 µm (No. 200 sieve) to be used in concrete. In the past, it was believed that this fraction was clay and, therefore, a poor performer. This is not necessarily ...
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        Characterizing Surface Properties of Aggregates Used in Hot Mix Asphalt 

        Bhasin, Amit; Little, Dallas N. (2006-03)
        Physical and chemical properties of aggregates at the micro scale strongly impact the adhesive bond (strength and durability) between bitumen and aggregate. These properties include surface free energy, chemical interaction ...
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        Determination of Aggregate Shape Properties Using X-ray Tomographic Methods and the Effect of Shape on Concrete Rheology 

        Erdogan, Sinan Turhan; Fowler, David W. (2005-08)
        The shape of aggregate particles can significantly influence certain properties of concrete, both in its fresh and hardened states. Therefore, there is a need to be able to completely characterize the shape of aggregate ...
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        Development of a Portable Rheometer for Fresh Portland Cement Concrete 

        Koehler, Eric Patrick; Fowler, David W. (2004-08)
        The purpose of this research was to identify an effective field test method for measuring the workability of concrete in general and of high-microfines concrete in particular. The workability of fresh concrete has traditionally ...
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        Effects of Aggregate Gradation and Angularity on VMA and Rutting Resistance 

        Park, Dae-Wook; Chowdhury, Arif; Button, Joe W. (2001-06)
        The Superpave system adopted the voids in mineral aggregate (VMA) criteria developed by McLeod using the 75-blow Marshall compactor for conventional dense-graded hot mix asphalt (HMA) mixtures. This VMA criteria is a ...
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        Effects of Superpave restricted zone on permanent deformation 

        Chowdhury, Arif; Button, Joe W.; Grau, Jose D. C. (2001-05)
        The purpose of this study is to evaluate the restricted zone effect using four different aggregates: crushed granite, crushed limestone, crushed river gravel, and a mixture of crushed river gravel as coarse aggregate with ...
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        The effects of the aggregates characteristics on the performance of Portland cement concrete 

        Quiroga, Pedro Nel; Fowler, David W. (2003-12)
        Aggregate shape, texture, and grading have a significant effect on the performance of fresh concrete. Aggregates blends with well-shaped, rounded, and smooth particles require less paste for a given slump than blends with ...
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        Evaluation of aggregate characteristics affecting HMA concrete performance 

        Masad, Eyad; Little, Dallas N.; Tashman, Laith; Saadeh, Shadi; Al-Rousan, Taleb; Sukhwani, Rajni (2004-01)
        This report documents the outcomes of the ICAR study on the Evaluation of Aggregate Characteristics Affecting HMA Concrete Performance. This study was conducted with support from the Federal Highway Administration (FHWA) ...
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        Evaluation of Superpave Fine Aggregate Angularity Specification 

        Chowdhury, Arif; Button, Joe W.; Kohale, Vipin; Jahn, David W. (2001-05)
        The validity of the Superpave fine aggregate angularity (FAA) requirement is questioned by both the owner agencies and the paving and aggregate industries. The FAA test is based on the assumption that more fractured faces ...
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        An Experimental Study on the Guidelines for Using Higher Contents of Aggregate Microfines in Portland Cement Concrete 

        Fowler, David W.; Ahn, Nam-Shik (2001-12)
        The use of manufactured fine aggregate (MFA) in portland cement concrete becomes more common as sources of natural sands are depleted. There is a great need to utilize MFA better, particularly the minus 75µm sizes. The ...
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        Federal Highway Administration Research Project, Task 3, Concrete Mixture Research Related to Pavements: Final Report 

        Fowler, David W. (2008-10-15)
        Manufactured fine aggregate (MFA) can be used as a replacement for or in conjunction with natural sand in concrete mixtures. MFA does not exhibit ideal shape or texture for fine aggregate, and the production of MFA generates ...
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        Field Validation of the Cross-Anisotropic Behavior of Unbound Aggregate Bases 

        Tutumluer, Erol; Adu-Osei, Alex; Little, Dallas N.; Lytton, Robert L. (2001-03)
        The ICAR Research Project 502 has focused on determining structural considerations of unbound aggregate pavement layers for a proper representation in the new AASHTO Pavement Design Guide 2002. The research team developed ...
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        Framework for Development of a Classification Procedure for Use of Aggregate Fines in Concrete 

        Zollinger, Dan G. , 1952-; Sarkar, Shondeep L. (2001-10)
        Although data on use of aggregate fines in portland cement concrete are largely very encouraging, there is a lack of proper definition, and knowledge regarding nature, and characteristics of different aggregate fines, their ...
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        Guidelines for Proportioning Optimized Concrete Mixtures with High Microfines 

        Quiroga, Pedro Nel; Fowler, David W. (2004-08)
        The optimization of aggregates is advantageous for economical and technical reasons; however, the availability of materials and construction operations can dictate the proportions of fine and coarse aggregates. Some general ...
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        ICAR Mixture Proportioning Procedure for Self-Consolidating Concrete 

        Koehler, Eric Patrick; Fowler, David W. (2007)
        Self-consolidating concrete (SCC) is an advanced type of concrete that can flow under its own mass without vibration, pass through intricate geometrical configurations, and resist segregation. The use of SCC can result in ...

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