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  • Open Access

    ARTICLE

    Mechanical Performance Analysis of Rubber Elastic Polymer-Polyurethane Reinforced Cement-Based Composite Grouting Materials

    Baoping Zou1,2, Jiahao Yin1,2, Chunhui Cao1,2,*, Xu Long3,*

    Journal of Polymer Materials, Vol.42, No.1, pp. 255-275, 2025, DOI:10.32604/jpm.2025.062081 - 27 March 2025

    Abstract The ongoing operation of subway systems makes existing tunnels vulnerable to deformations and structural damage caused by adjacent foundation pit construction. Such deformations-manifesting as horizontal displacement, heightened lateral convergence, and internal force redistribution-may significantly compromise subway operational safety. Grouting remediation has become a widely adopted solution for tunnel deformation control and structural reinforcement. Developing optimized grouting materials is crucial for improving remediation effectiveness, ensuring structural integrity, and maintaining uninterrupted subway operations. This investigation explores the substitution of fine mortar aggregates with 0.1 mm discarded rubber particles at varying concentrations (0%, 3%, 6%, 9%, 12%, and More >

  • Open Access

    ARTICLE

    Experimental Study of Moso Bamboo to-Steel Connections with Embedded Grouting Materials

    Shidong Nie1,2, Wei Fu1,2, Hui Wang1,2,*, Di Wu1,2,3, Min Liu1,2, Junlong Wang4

    Journal of Renewable Materials, Vol.11, No.3, pp. 1401-1423, 2023, DOI:10.32604/jrm.2022.023446 - 31 October 2022

    Abstract Moso bamboos have attracted excessive attention as a renewable green building material to the concept of sustainable development. In this paper, the 20 bolted Moso bamboo connection specimens with embedded steel plates and grouting materials were designed according to connection configurations with different bolt diameters and end distance of bolt holes, and their bearing capacities and failure modes were analyzed by static tension tests. According to the test results of all connectors, the failure modes of the specimens are divided into four categories, and the effects of bolt diameter and bolt hole end distance on More >

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