The Effect Of Clay Content In Sands Used For Cementitious

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The effect of clay content in sands used for cementitious ...

01/05/2007  The propensity of the clays to affect the normal storage and transport of water within cementitious matrices suggests that they can also affect the dimensional stability – shrinkage – of the resultant concrete; this is recognized by us and previous investigators.

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The effect of clay content in sands used for cementitious ...

Local sands may contain significant amounts of clay, considered by local artisans to be detrimental to concrete strength; however, in an LEDC context, there is little evidence to support this. In this study, the compressive strength and workability of representative LEDC clay-contaminated concrete was determined. Clay-cement interactions were studied using X-Ray Diffraction (XRD). Different ...

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The effect of clay content in sands used for cementitious ...

Existing research (Fernandes et al., 2007) suggests that the high content of clay in original river-sand and sea-sand may have detrimental effects on the workability and strength of UHPC....

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The effect of clay content in sands used for cementitious ...

15/05/2007  OSTI.GOV Journal Article: The effect of clay content in sands used for cementitious materials in developing countries. The effect of clay content in sands used for cementitious materials in developing countries. Full Record; Other Related Research; Abstract ...

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The effect of clay content in sands used for cementitious ...

The cost of building materials in Less Economically Developed Countries (LEDCs) is one of the single largest contributing factors to housing costs. They are often transported over relatively large distances at considerable expense. Local sands may contain significant amounts of clay, considered by local artisans to be detrimental to concrete strength; however, in an LEDC context, there is ...

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The effect of clay content in sands used for cementitious ...

15/05/2007  OSTI.GOV Journal Article: The effect of clay content in sands used for cementitious materials in developing countries. The effect of clay content in sands used for cementitious materials in developing countries. Full Record; Other Related Research; Abstract ...

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The effect of clay content in sands used for cementitious ...

The cost of building materials in Less Economically Developed Countries (LEDCs) is one of the single largest contributing factors to housing costs. They are often transported over relatively large distances at considerable expense. Local sands may contain significant amounts of clay, considered by local artisans to be detrimental to concrete strength; however, in an LEDC context, there is ...

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The effect of clay content in sands used for cementitious ...

15/05/2007  The effect of clay content in sands used for cementitious materials in developing countries The effect of clay content in sands used for cementitious materials in developing countries. Access Restriction Open. Author: Fernandes, V. A. ♦ Purnell, P. . ♦ Still, G. T. ♦ Thomas, T. H. Source: United States Department of Energy Office of Scientific and Technical Information: Content type ...

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The effect of clay content in sands used for cementitious ...

The effect of clay content in sands used for cementitious materials in developing countries. V.A. Fernandes [0] P. Purnell [0] G.T. Still [0] T.H. Thomas [0] Cement and Concrete Research, pp. 751-758, 2007. Cited by: 13 Views 7. EI. Keywords: Workability X-Ray diffraction Compressive strength Clay. Abstract: The cost of building materials in Less Economically Developed Countries (LEDCs) is ...

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[PDF] The Effect Of Clay Content In Sands Used For ...

Download and reference “The Effect Of Clay Content In Sands Used For Cementitious Materials In Developing Countries” by on Citationsy Online citations, reference lists, and bibliographies. Home

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The effect of clay content in sands used for cementitious ...

Local sands may contain significant amounts of clay, considered by local artisans to be detrimental to concrete strength; however, in an LEDC context, there is little evidence to support this. In this study, the compressive strength and workability of representative LEDC clay-contaminated concrete was determined. Clay-cement interactions were studied using X-Ray Diffraction (XRD). Different ...

Get Price

The effect of clay content in sands used for cementitious ...

Article “The effect of clay content in sands used for cementitious materials in developing countries” Detailed information of the J-GLOBAL is a service based on the concept of Linking, Expanding, and Sparking, linking science and technology information which hitherto stood alone to support the generation of ideas. By linking the information entered, we provide opportunities to make ...

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Practical technical solution for clay-contaminated sands ...

Practical technical solution for clay-contaminated sands used in concrete Pierre Estephane1, *, ... clay contents and consequent effects on plastic concrete quality. A technical solution is being ...

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Tolerance of Clay Minerals by Cement: Effect of Side-Chain ...

01/12/2016  Polycarboxylate superplasticizer (PCE) is a widely used water-reducing agent that can reduce significantly the water demand of concrete, which reduces the porosity and enhances the strength and durability of the concrete. (The PCE consists of a single backbone with many long PEO side chains.) Generally, aggregate occupies >70 wt.% of concrete; clay minerals are ubiquitous in

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Effect of Fineness of Sand on the Cost and Properties of ...

It is generally recommended by code to use sands of zones I to Zone III for Structural concrete works. AASTHO Designation: M6-93- "Standard Specification for Fine Aggregate For Portland Cement Concrete"- It indicates that the fineness modulus of sand will not be less than 2.3 and nor more than 3.1. Further, fine aggregate failing to meet the fineness modulus requirement as above may be ...

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Practical technical solution for clay-contaminated sands ...

Practical technical solution for clay-contaminated sands used in concrete Pierre Estephane1, *, ... clay contents and consequent effects on plastic concrete quality. A technical solution is being ...

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The effect of clay content in sands used for cementitious ...

Article “The effect of clay content in sands used for cementitious materials in developing countries” Detailed information of the J-GLOBAL is a service based on the concept of Linking, Expanding, and Sparking, linking science and technology information which hitherto stood alone to support the generation of ideas. By linking the information entered, we provide opportunities to make ...

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Effect of Sand Fines and Water/Cement Ratio on Concrete ...

Another contributing factor affecting concrete strength is the water content used which in some cases are increased to improve workability [11,12]. When the fines content in sand are excessive, there is the need to add more water to the concrete mix in other to improve the workability. That is fine particles such as clay and cement interact with water in a physiochemical state which leads to ...

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Effects of Clay and Moisture Content on Direct Shear Tests ...

16/01/2013  3.2. Effect of Moisture Content. The influence of moisture content on both shear strength parameters is very significant. As can be seen from the charts in Figure 11 the 15% clay-sand mixture is showing steep drop (6%) compared to 5% and 10% clay-sand mixtures where the drop is

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Soil stabilization with cement and affect the cement ...

A satisfactory soil-cement can be obtained by clayed and silty soils, but those with a high clay-content are difficult to pulverize. Moreover, the quantity of cement increase with an increase in clay content. In this case, the quality of soil-cement is not good because it may have high shrinkage properties.

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Effect of Fineness of Sand on the Cost and Properties of ...

It is generally recommended by code to use sands of zones I to Zone III for Structural concrete works. AASTHO Designation: M6-93- "Standard Specification for Fine Aggregate For Portland Cement Concrete"- It indicates that the fineness modulus of sand will not be less than 2.3 and nor more than 3.1. Further, fine aggregate failing to meet the fineness modulus requirement as above may be ...

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Molding Sand: Constituents, Types and Properties

The effect of clay and water decreases permeability with increasing clay and moisture content. The green compressive strength first increases with the increase in clay content, but after a certain value, it starts decreasing. For increasing the molding sand characteristics some other additional materials besides basic constituents are added which are known as additives.

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Foundations on clay soil LABC

18/01/2019  In normal weather conditions clay adapts to the way nearby trees use water and maintains a steady amount - with the trees drawing out what they need. If you remove a mature tree, the clay won't be able to contain the excess water and will swell - sometimes with enough force to move foundations and lift concrete ground floors, causing serious structural damage. So cut down the tree or leave it ...

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Different Types of Sand and What They Should be Used for ...

This is due to the fact that if there is a greater silt content then this can seriously effect the structural integrity of the concrete it’s used in. For this reason, all sand used should be clean and free from clay, salts and any other impurities. There is a method of testing the silt content of sand called (funnily enough) the “silt test”.

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Quick-look lithology from logs - AAPG Wiki

12/03/2019  In fact, grain size has no effect on gamma ray logs. The log shapes reflect shaliness, that is, clay and mica content of the sand. Because most sands reflect a hydrodynamic equilibrium, clay content does usually correlate (inversely) with grain size. However, in the following examples, clay content and grain size do not correlate, resulting in misleading log shapes: Very fine, clean sand

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