Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Early Strength"”.
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Durable high early strength concrete
… and $1.15 million dollars per lane mile. High early strength Portland cement concrete pavement (PCCP) patches are widely used in pavement preservation in Kansas due to the ability to open to traffic early. However, these repairs done by the Kansas Department of Transportation (KDOT) deteriorate …
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Towards performance engineered specifications for high early strength concrete pavement repair applications
… highway repair applications are required to gain strength at a much faster pace than regular concrete mixtures. By uniquely focusing on the strength requirements, other mixture properties such as durability are often neglected, so that many agencies have reported premature failure of the repaired …
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Cold In-Place Recycling with Expanded Asphalt Mix (CIREAM)
… (CIR) and other methods. Although CIREAM offers early strength advantages and extended paving periods among other benefits, late season CIREAM can be burdened by distresses such as ravelling, potholing and other moisture-induced damage. Limited information on the behaviour and failure mechanisms …
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Hydration, Pore Development and Chemical Resistance of Metakaolin - Fly Ash - Portland Cement (MK-PFA-PC) Blends
… is problematic, as there is slow and low early strength development whereas MK enhances early strength development. Combining these materials in ternary blends should therefore produce a high performance material at an acceptable cost for use as a pozzolan. However the properties and …
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An investigation of the characteristics of high alumina refractory castables
… setting property combined also with high early strength. The discovery of the fact that these refractory concretes could be cast, in situ, into various structures, shapes and sizes, made a great advance in the application of such castables in a wide variety of installations in …
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Estabilização de areia com cinza volante e cal; efeito do cimento como aditivo e de brita na mistura
… cement and crushed stone on the compressive strength of the mix. In order to enhance fly ash role the soil chosen was a non-cohesive one - a uniform dune sand - which is not quite suitable for stabilization with cement and not at all with lime. Stabilization effect results from cementation of …
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An investigation of the effects of abnormal curing conditions on Dolomitic limestone Portland cement concrete
… as follows: 1. Fresh concrete continues to gain strength while in the frozen state. 2. Freezing and then thawing of fresh concrete does not have an appreciable effect on the twenty-eight day ultimate strength, and the concrete, if given time to recover, will compare favorably with concrete cured …
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Valorization of boiler ash in alkali activated material
… on a chemical reaction to give the product its strength. The aim is to create a mix design which is robust enough to account for the variability in the ash and which produces a high performing masonry unit that is both economically and environmentally sustainable. This work presents two key …
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Development of a New Cold Binder Course Emulsion Asphalt
… emulsion mixtures (CBEMs). However, to date, low early life stiffness, a slower rate of curing, the length of time necessary to achieve full strength, high air void contents and the presence of moisture in these mixtures have prevented them from being fully embraced by pavement authorities. This …
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Evaluation of Resistivity Meters for Concrete Quality Assurance, Project TR201414
… low permeability as well as high compressive strength with an average value of over 9,000 psi at 90 days. The two repair mixtures showed moderate to low penetrability readings and high early strength consistent with their desired purpose. Tests were also performed on a series of slab samples …
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Ternary combination concretes using GGBS, fly ash & limestone: strength, permeation & durability properties
… and covered fresh properties, compressive strength, permeation and durability properties (using standard water curing for the latter three) and considered, for the hardened properties, how these may be balanced with environmental cost.<br/>The mixes covered a range of w/c ratios (0.35. 0.50 …
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The Influence of Amorphous, Sub-Micrometer Silica Particles in Cement Pastes and Mortars with Very Low Water-to-Cement Ratios (Ultra-High Performance Concrete)
… particle size distribution on the compressive strength of mortars. The following scientific approach was used in this work to address the research objectives. First, the different types of silica are characterized with respect to further reactions in a cementitious system. Second, the effect of …
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Development of a New High Performance Cold Mix Asphalt
… Accordingly, the development of a CBEM with high early strength and minimal curing time is of increasing interest to researchers in the asphalt industry. The aim of this research work was to develop a new, high performance and environmentally friendly, surface course, cold bitumen emulsion mixture …
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HIGH STRENGTH COLD ROLLED ASPHALT SURFACE COURSE MIXTURES
… BEM in terms of the long curing process and low early strength. Decreasing wastes from aggregate production processes, reducing land-filling and reducing CO2 emissions during hot bituminous mixture production and laying are the main target schemes for the environmentally friendly processes. Cold …
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Development of Sustainable Concretes for the Gulf Region
… properties to be also compared on an equal strength basis. Finally, the eCO2 and the practical implications of these concretes were discussed. <br/><br/>The results from the physical and chemical characterization tests on recycled aggregates suggest that the properties of coarse CDWA and EWA …