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  1. theconstructor.org › geotechnical › uniformity-coefficient-cuUniformity Coefficient(Cu) and Coefficient of Curvature(Cc) ...

    The uniformity coefficient (Cu) is defined as the ratio of D60 to D10. A value of Cu greater than 4 to 6 classifies the soil as well graded. When Cu is less than 4, it is classified as poorly graded or uniformly graded soil. Uniformly graded soil has identical particles with Cu value approximately equal to 1.

  2. engineeringdiscoveries.com › uniformity-coefficientcu-andUniformity Coefficient (Cu) And Coefficient Of Curvature ...

    The uniformity coefficient (Cu) is defined as the ratio of D60 to D10. A value of Cu greater than 4 to 6 classifies the soil as well graded. When Cu is less than 4, it is classified as poorly graded or uniformly graded soil. Uniformly graded soil has identical particles with Cu value approximately equal to 1.

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  4. www.geoengineer.org › education › laboratory-testingStep-by-Step Guide for Grain Size Analysis - Geoengineer.org

    The uniformity coefficient (C u) expresses the variety in particle sizes of soil and is defined as the ratio of D 60 to D 10 (Figure 1). The value D 60 is the grain diameter at which 60% of soil particles are finer and 40% of soil particles are coarser, while D 10 is the grain diameter at which 10% of particles are finer and 90% of the ...

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  5. www.archsd.gov.hk › media › publications-publicityGeneral Specification for Building 2012 Edition ...

    The total sulphate content, expressed as SO3, of the suitable material placed within 500 mm of metal work shall not exceed 0.5% by mass. The method of testing of the total sulphate content shall be in accordance with Geospec 3 - Model Specification for Soil Testing issued by the Geotechnical Engineering Office.

  6. sapienknows.com › soil-particle-size-distribution-d10-cu-cc-autoParticle Size Distribution: Calculate Soil Coefficients (Cu ...

    2024年1月31日 · Uniformity coefficient (Cu): It is the ratio between the sieve size which will pass 60% of the sand by weight (D60) to the effective size (D10). Cu = D60/D10. A higher Cu value indicates a wider range of particle sizes and, consequently, a less uniform soil.

  7. uta.pressbooks.pub › soilmechanics › chapterSieve Analysis – Properties and Behavior of Soil ...

    Information obtained from the particle size analysis (uniformity coefficient C u, coefficient of curvature, C c, and effective size, D 10, etc.) is used to classify the soil. Particle size is one of the criteria used to ascertain whether the soil is suitable for building roads, embankments, dams, etc.

  8. www.astm.org › d6913_d6913m-17Standard Test Methods for Particle-Size Distribution ...

    2021年2月15日 · 5.2 The gradation (particle-size distribution) curve is used to calculate the coefficient of uniformity and the coefficient of curvature. 5.3 Selection and acceptance of fill materials are often based on gradation. For example, highway embankments, backfills, and earthen dams may have gradation requirements.