The Experts below are selected from a list of 4803 Experts worldwide ranked by ideXlab platform

Huo Jun-fan - One of the best experts on this subject based on the ideXlab platform.

  • Study on Freeze-thaw Damage Model and Residual Life Prediction of Pumice Lightweight Aggregate Concrete
    Bulletin of the Chinese ceramic society, 2014
    Co-Authors: Huo Jun-fan
    Abstract:

    Based on the data from the experimental study about pumice Lightweight Aggregate Concrete,the paper makes a deeper study about its frost-resistance. Based on the variation rule of quality and relative dynamic elastic modulus about pumice Lightweight Aggregate Concrete,the paper builds freeze-thaw damage model and predicts the remaining life for pumice Lightweight Aggregate Concrete. The experimental research results show that the frost-resistance of pumice Lightweight Aggregate Concrete performs better, and with the replacement rate of pumice increases,the remaining life of Concrete is prolonged but the compressive strength is decreased.

Shen Xiang-dong - One of the best experts on this subject based on the ideXlab platform.

  • Study on Pore Structure of the Mechanism of Natural Lightweight Aggregate Concrete is Mixed with Metakaolin
    Bulletin of the Chinese ceramic society, 2013
    Co-Authors: Shen Xiang-dong
    Abstract:

    The mechanical properties and durability of Lightweight Aggregate Concrete mixed with 0% 、10% 、 15% 、20% metakaolin was studied.After comparison of the experimental group and the reference group,finding out the optimal content of 15% metakaolin improve the Lightweight Aggregate Concrete compressive strength and splitting tensile strength greatly,and the frost resistance of Lightweight Aggregate Concrete.

  • Study of carbon fiber Lightweight Aggregate Concrete compressive strength
    2011
    Co-Authors: Shen Xiang-dong
    Abstract:

    Inner Mongolia natural pumice for the coarse Aggregate,by comparing the different content of carbon fiber and Lightweight Aggregate Concrete cube compressive strength of prism obtained carbon fiber reinforced Lightweight Aggregate Concrete compressive strength of the basic law.Concrete is a brittle material,the addition of carbon fiber can improve the tensile properties of Concrete to overcome and reduce the production of micro-cracks inside the Concrete.The results show that carbon fiber reinforced Lightweight Aggregate Concrete with compressive strength of carbon fiber is not the increase of dosage.

  • Heaving of Lightweight Aggregate Concrete in Open System
    Journal of Building Materials, 2010
    Co-Authors: Shen Xiang-dong
    Abstract:

    Natural pumice from the eastern Inner Mongolia was used as coarse Aggregate for Lightweight Aggregate Concrete.Through rapid freeze-thaw cycle experiment on Lightweight Aggregate Concrete samples in an open system,the factors influencing heaving of the fiber reinforced Concrete material were investigated and the characteristics of temperature change during freeze-thaw and the factors influencing heaving change of fiber reinforced Concrete was analyzed.The freeze-thaw property subject to sudden temperature drop in northern China was simulated to show the suppression of heaving of Lightweight Aggregate Concrete by fiber.Polypropylene fiber can restrain the freeze-thaw damage effectively.Test results show that frost-resisting properties are the best when mixed with 0.9 kg/m~3 of fiber.

  • Experimental study on influence of fly ash on durability of Lightweight Aggregate Concrete
    New Building Materials, 2009
    Co-Authors: Shen Xiang-dong
    Abstract:

    The influence of fly ash on durability of Lightweight Aggregate Concrete is studied using natural pumice from the eastern Inner Mongolia as coarse Aggregate by tests of impermeability,carbonization,resistance to filtration of chloride ion and compressive strength. The result indicates that fly ash can make the early compressive strength and carbonization resistance of Lightweight Aggregate Concrete somewhat reduce,but it can effectively improve the impermeability and resistance to filtration of chloride ion of Lightweight Aggregate Concrete.

Yue-lin Huang - One of the best experts on this subject based on the ideXlab platform.

  • Fire-resistance property of reinforced Lightweight Aggregate Concrete wall
    Construction and Building Materials, 2012
    Co-Authors: C.g. Go, Jun-ren Tang, Cheng-tung Chen, Yue-lin Huang
    Abstract:

    Abstract This research focuses on reinforced Lightweight Aggregate Concrete walls. After performing a standard temperature rising fire-resistance test, the fire resistance performance and mechanic behavior of the wall sample are studied under a lateral horizontal load. Reinforced Lightweight Aggregate Concrete walls and reinforced normalweight Concrete walls are given the fire-resistance test under the same conditions, then their fire resistance performance and mechanical behaviors are compared. Taking into consideration the steel spacing, Aggregate type, wall size, and high temperature as the wall sample variables. The research results showed that the reinforced Lightweight Aggregate Concrete wall is superior to the reinforced normalweight Concrete wall on ultimate load, yield load, cracked load, stiffness, ductility, and inter-story drift after a high-temperature fire-resistance test. In terms of failure patterns, for a reinforced Lightweight Aggregate Concrete wall after a high-temperature fire-resistance test, the smaller the steel spacing the higher the yield load and ultimate load, but the worse the ductility. This result matched the results of the reinforced Lightweight Aggregate Concrete wall without the high-temperature fire-resistance test and revealed that the reinforced Lightweight Aggregate Concrete wall retained its mechanics after the fire-resistance test.

Gao Ying-l - One of the best experts on this subject based on the ideXlab platform.

  • Segregation Resistance of Nano SiO_2 Fly Ash Lightweight Aggregate Concrete
    Bulletin of the Chinese ceramic society, 2015
    Co-Authors: Gao Ying-l
    Abstract:

    Lightweight Aggregate Concretes of strength grade raging from LC40 to LC50 were prepared by adding different proportions of fly ash and nano SiO2. Segregation resistance of Lightweight Aggregate Concrete was studied by slump and segregation degree tests. The results indicate that adding of finer fly ash can enhance the liquidity of Lightweight Aggregate Concrete and enlarge the slump,meanwhile,with the increasing of fly ash content,segregation degree of Concrete is decreased and floating of Lightweight Aggregate is somewhat alleviative but still exists,adding of nano SiO2 can improve the segregation resistance of Lightweight Aggregate Concrete to a certain extent,meanwhile,deteriorate the fluidity of Concrete mixture,combined admixture of nano SiO2 and fly ash can not only increase the slump of Lightweight Aggregate Concrete, but also improve its segregation resistance, prevent the floating of Lightweight Aggregate. Studies indicate that Lightweight Aggregate Concrete containing 2% nano SiO2and18% fly ash has the best workability. Mechanical property tests indicate that combined admixture of nano SiO2 and fly ash can improve the compressive strength of Lightweight Aggregate Concrete.

  • Mesoscale Crack Propagation and Evolution Law of Lightweight Aggregate Concrete Under Pressure and Sulfate Attack
    China Journal of Highway and Transport, 2014
    Co-Authors: Gao Ying-l
    Abstract:

    To provide theoretical foundation for the extended application of Lightweight Aggregate Concrete in bridge construction,30% ordinary sand was replaced by grade 1fly ash of the same volume and 10% cement was replaced by equivalent silica fume,and two kinds of Lightweight Aggregate Concretes were prepared with crushed shale ceramisite and spherical shale ceramisite respectively.Tests about compressive strength,industrial CT and drying-wetting cycle in sulfate solution were adopted to study the corrosion resistance,CT numbers in the section,evolution law of crack and influencing factors of crack propagation rate of Lightweight Aggregate Concrete,meanwhile the propagation and dynamic evolution law of mesoscale crack of Lightweight Aggregate Concrete under sulfate attack were analyzed.The results show that the corrosion resistance coefficients of the crushed and spherical shale ceramisite Lightweight Aggregate Concrete are 1.12 times and 1.17 times of those of ordinary Concrete after 50drying-wetting cycles in 5% Na2SO4 respectively,and the failure surface is mainly throughout the Aggregate.The process from theappearance of mesoscale crack to the failure of whole structure can be divided into four stages:pressure consolidation,crack initiation and development,crack propagation and penetration,and damage.With the increase of drying-wetting cycles,the influencing factors of crack propagation rate and the loss of elastic modulus of Lightweight Aggregate Concrete are fewer and less than those of ordinary Concrete,and those of the crushed Lightweight Aggregate Concrete are slightly more and larger than those of the spherical Lightweight Aggregate Concrete.

C.g. Go - One of the best experts on this subject based on the ideXlab platform.

  • Fire-resistance property of reinforced Lightweight Aggregate Concrete wall
    Construction and Building Materials, 2012
    Co-Authors: C.g. Go, Jun-ren Tang, Cheng-tung Chen, Yue-lin Huang
    Abstract:

    Abstract This research focuses on reinforced Lightweight Aggregate Concrete walls. After performing a standard temperature rising fire-resistance test, the fire resistance performance and mechanic behavior of the wall sample are studied under a lateral horizontal load. Reinforced Lightweight Aggregate Concrete walls and reinforced normalweight Concrete walls are given the fire-resistance test under the same conditions, then their fire resistance performance and mechanical behaviors are compared. Taking into consideration the steel spacing, Aggregate type, wall size, and high temperature as the wall sample variables. The research results showed that the reinforced Lightweight Aggregate Concrete wall is superior to the reinforced normalweight Concrete wall on ultimate load, yield load, cracked load, stiffness, ductility, and inter-story drift after a high-temperature fire-resistance test. In terms of failure patterns, for a reinforced Lightweight Aggregate Concrete wall after a high-temperature fire-resistance test, the smaller the steel spacing the higher the yield load and ultimate load, but the worse the ductility. This result matched the results of the reinforced Lightweight Aggregate Concrete wall without the high-temperature fire-resistance test and revealed that the reinforced Lightweight Aggregate Concrete wall retained its mechanics after the fire-resistance test.