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  • Open Access


    Mechanical Properties and Microcosmic Properties of Self-Compacting Concrete Modified by Compound Admixtures

    Song Yang1, Bing Qi1, Zubin Ai1, Zhensheng Cao1, Shiqin He2,*, Lijun Li3

    Journal of Renewable Materials, Vol.10, No.4, pp. 897-908, 2022, DOI:10.32604/jrm.2022.016653

    Abstract It has become a research hotspot to explore raw material substitutes of concrete. It is important to research the mechanical properties of self-compacting concrete (SCC) with slag powder (SP) and rubber particle (RP) replacing cement and coarse aggregate, respectively. 12 kinds of composite modified self-compacting concrete (CMSCC) specimens were prepared by using 10%, 20% and 30% SP and 30%, 40%, 50% and 60% RP. The rheological properties, mechanical properties and microstructure of the CMSCC were investigated. Results indicate that the workability, compressive strength, splitting tensile strength and flexural strength of CMSCC prepared by 20% SP and less than 40% RP… More >

  • Open Access


    Analysis on Pore Structure of Non-Dispersible Underwater Concrete in Saline Soil Area

    Fang Liu1, Baomin Wang2,*, Mengsai Wang2, Xiaosa Yuan1

    Journal of Renewable Materials, Vol.9, No.4, pp. 723-742, 2021, DOI:10.32604/jrm.2021.013664


    In this paper, mercury intrusion porosimetry (MIP) is used to test the pore structure of non-dispersible underwater concrete so as to study the influence of pouring and curing environment, age and slag powder on the pore characteristics of concrete, analyze the pore characteristics, porosity and pore distribution of concrete in different hydration stages, and reveal the relationship between pore structure and permeability of concrete. The results show that the pore-size distribution of concrete in fresh water condition is better than that in sulfate environment and mixed salt environment, and therefore, sulfate as well as mixed salt are not conducive to… More >

  • Open Access


    Experimental Research of Concrete with Steel Slag Powder and Zeolite Powder

    Yang Ming1,2,3, Ping Chen1,2,3,*, Yuanhao Wang1,2,3,*, Ling Li1,2,3, Xuandong Chen1,2,3, Pengliang Sun1,2,3,4

    Journal of Renewable Materials, Vol.8, No.12, pp. 1647-1655, 2020, DOI:10.32604/jrm.2020.011929

    Abstract In order to increase use ratio of steel slag solid waste, the concrete containing steel slag powder and zeolite powder as admixtures was prepared by using the orthogonal test method. The effects of water-binder ratio, sand ratio, steel slag powder content and zeolite powder on working properties, mechanical strength and chloride ion permeability of the concrete was studied. It was found that the early strength of the concrete had a decrease with the mixing of steel slag and zeolite powders, but its later strength approached to pure concrete. Moreover, the physical filling and pozzolanic activity of the admixtures increased the… More >

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