Global ETD Search
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Showing 1 to 10 of 10 for “"Shrinkage reducing admixture"”.
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EFFECT OF CRACK-REDUCING TECHNOLOGIES AND SUPPLEMENTARY CEMENTITIOUS MATERIALS ON SETTLEMENT CRACKING OF PLASTIC CONCRETE AND DURABILITY PERFORMANCE OF HARDENED CONCRETE
ABSTRACT The effects of crack-reducing technologies and supplementary cementitious materials on plastic settlement cracking and the durability of concrete subjected to freezing and thawing were evaluated. The study of settlement cracking included 86 concrete mixtures containing internal curing …
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SYNERGISTIC EFFECT OF SHRINKAGE MITIGATING STRATEGIES ON PERFORMANCE OF FIBER-REINFORCED CEMENTITIOUS COMPOSITES
<p>"The advantages of using shrinkage mitigating strategies to reduce shrinkage and mitigate cracking of concrete is well documented. However, the benefits and drawbacks of employing multiple strategies have not been explored. The main objective of this study is to provide insights into the …
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Design and performance of cost-effective ultra high performance concrete for bridge deck overlays
… was examined. The efficiency of various shrinkage mitigation approaches in reducing autogenous and drying shrinkage of optimized UHPC mixtures was evaluated. This included the use of CaO-based and MgO-based expansive agents, shrinkage-reducing admixture, and pre-saturated lightweight …
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Low-Shrinkage Fiber-Reinforced Concrete for Infrastructure Construction and Rehabilitation
… of this study is to develop two classes of low-shrinkage high-performance concrete (HPC): fiber-reinforced super workable concrete (FR-SWC) for infrastructure construction and fiber-reinforced self-consolidating concrete (FR-SCC) for repair applications. HPC with excess content of shrinkage …
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STRATEGIES TO IMPROVE SHRINKAGE RESISTANCE OF CEMENT-BASED MATERIALS FOR EXTRUSION-BASED 3D PRINTING
… of this study is to develop new generation of shrinkage-resistant 3D printable mortar mixtures. To this end, the research work was carried out to: i) identify key material and processing parameters that affect printability; ii) investigate the influence of water-to-cement ratio, …
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Influence of mix design parameters on restrained shrinkage cracking in non-structural concrete patch repair mortars
… their corresponding interactions, on restrained shrinkage cracking in non-structural concrete patch repair mortars (PRMs). This dearth of information makes the design and development of PRMs with improved resistance to cracking challenging. The problem is further compounded by the fact that the …
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Early age creep and shrinkage of emerging concrete materials
… components of volume change are external drying shrinkage, autogenous shrinkage, and thermal dilation. When concrete is restrained, tensile stress develops due to shrinkage and increases the probability of cracking. Early age properties, such as tensile creep, are not well understood and the …
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Modification of crumb rubber cement interface and its effect on strength and viscoelastic properties
… and paste. The first task also includes usage of shrinkage reducing admixture in bulk mixture and as a pretreatment to alter the surface chemistry of rubber, and testing its effect on the performance of rubberized cement paste samples. The second task involves understanding how curing conditions …
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Understanding and predicting transient material behaviors associated with mechanical resonance in cementitious composites
… cement paste prisms with varying amounts of shrinkage reducing admixture were studied and compared to linear measurements performed on the same samples. The slow dynamic behaviors provided a measure of the bulk relative material damage at a single point in time, whereas the linear methods …
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Mitigation of early age cracking of concrete for bridge decks
In order to reduce reconstruction time and costs in order to better serve the general public a need has arisen for longer service life when considering concrete bridge decks for highway applications. Service life of concrete bridge decks is often cut short indirectly, due to deterioration …