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Minjui Hung - One of the best experts on this subject based on the ideXlab platform.

  • sludge ash hydrated lime on the geotechnical properties of soft soil
    Journal of Hazardous Materials, 2007
    Co-Authors: Minjui Hung
    Abstract:

    Abstract In this study, an effort to improve the properties and Strength of soil, sewage sludge ash (SSA) and hydrated lime are applied to stabilize soft cohesive subgrade soil. Five different ratios (in weight percentage), 0%, 2%, 4%, 8%, and 16%, of sludge ash/hydrated lime are proposed for mixture with cohesive soil. Then, the effects of the different proportions of SSA/hydrated lime on soft cohesive soil are studied. Test results indicate that the unconfined compressive Strength of specimens with additives was raised from three to seven times better than that of the untreated soil, and swelling behaviors were also effectively reduced for those specimens. Results of triaxial compression test indicate that the Shear Strength Parameter, c, rose with an increased amount of additives and improved from 30 to 50–70 kPa. On the whole, SSA/hydrated lime could particularly improve the geotechnical properties of cohesive subgrade soil.

Norruddin Nur Syazana - One of the best experts on this subject based on the ideXlab platform.

  • The effect of sawdust on Shear Strength properties of peat soil
    2013
    Co-Authors: Norruddin Nur Syazana
    Abstract:

    Peat soil is an extremely formed of soft soil that always considered problematic by the numerous engineers. In the construction field, peat soil is not being the engineer's choice due to its properties that is low in Shear Strength and high compressibility. This weakness gives difficulties to engineer to develop infrastructures and facilities due to the limited lands in Malaysia. An appropriate soil improvement is needed. Stabilizing the peat soil is the most effective way to overcome the drawback of this issue. This paper presents a study on the effect of sawdust on Shear Strength properties of peat soil that has been conducted for sampling area at Kampung Tanah Puteh in area of Pekan, Pahang. A total of 15 samples of peat soil with various mixes proportion of sawdust varies from 0%, 1.0%, were analyzed by laboratory testing that subjected to normal stress of 136.2kPa, 272.5kPa and 408.8kPa at each of the proportion. The direct Shear test was performed to determine the Parameters of Shear Strength which are cohesion and angle of Shear resistance and determination of the optimum mix of sawdust with peat soil which gives the maximum Shear Strength. The study revealed that by adding sawdust at exact 1.5%, 2.0% and 2.5% value can give the maximum value of Shear Strength. The Shear Strength Parameter which is cohesion is inversely proportional to the angle of Shear resistance. The optimum mix for peat soil was at 1.0% of sawdust.

Amin Eisazadeh - One of the best experts on this subject based on the ideXlab platform.

  • Physicochemical behavior of tropical laterite soil stabilized with non-traditional additive
    Acta Geotechnica, 2016
    Co-Authors: Nima Latifi, Aminaton Marto, Amin Eisazadeh
    Abstract:

    Non-traditional soil stabilizers are widely used for treating weak materials. These additives are cost- and time-effective alternatives to more traditional materials such as lime and cement. It has been well established that the treatment of natural soil with chemical additives will gradually affect the size, shape, and arrangement of soil particles. Furthermore, the degree of improvement is dependent on the quantity and the pattern of new products formed on and around the soil particles. In this paper, unconfined compressive Strength (UCS) test was performed as an index of soil improvement on mix designs treated with calcium-based powder stabilizer (SH-85). The time-dependent changes in Shear Strength Parameter and compressibility behavior of treated soil were also studied using standard direct Shear and one-dimensional consolidation tests. In order to better understand the shape and surface area of treated particles, FESEM, N_2-BET, and particle size distribution analysis were performed on soil-stabilizer matrix. From engineering standpoint, the UCS results showed that the degree of improvement for SH-85-stabilized laterite soil was roughly five times stronger than the untreated soil at the early stages of curing (7-day period). Also, a significant increase in the compressibility resistance of treated samples with curing time was observed. Based on the results, less porous and denser soil fabric was seen on the surface of clay particles. FESEM images of the treated mix designs showed the formation of white lumps in the soil fabric with the cementitious gel filling the pores in the soil structure.

Uist Baotou - One of the best experts on this subject based on the ideXlab platform.

  • fuzzy regression estimate of the rock Shear Strength Parameter
    Journal of Baotou University of Iron and Steel Technology, 2000
    Co-Authors: Uist Baotou
    Abstract:

    The method of calculating Shear Strength c,f value of rock and surface of discontinuity with the fuzzy regression estimate is presented and the regression principle and method are given out. Fuzzy cohesion and angle of internal friction expressed by fuzzy number reflect the fuzziness of the test sample and have clear limit that the rock mechanics Parameter is chosen in the rockmass engineering stability analysis,to avoid casual election of the Parameters.

Li Jing - One of the best experts on this subject based on the ideXlab platform.

  • the definite method of Shear Strength Parameter on rock mass based on fuzzy statistics
    Soil Engineering and Foundation, 2008
    Co-Authors: Li Jing
    Abstract:

    The Shear Strength Parameter of slope rock masses is one of primary geological factors affecting the slope stability and the Parameter is affected by some perplexing factors with a indefinite feature. Based on the random and fuzzy of rock mechanical Parameters, the random-fuzzy statistics theory and related computed formulas is introduced to define Shear Strength Parameter of rock mass. On the grounds of Shear tests of host rock from different angles, it is proved that the proposed method and theory can better reflect the intrinsic properties of rock.