地质聚合物再生骨料混凝土的力学性能和耐久性：综述。,Polymers

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地质聚合物再生骨料混凝土的力学性能和耐久性：综述。
Polymers ( IF 4.7 ) Pub Date : 2023-01-25 , DOI: 10.3390/polym15030615
Peng Zhang ₁ , Xiaoyao Sun ₁ , Fei Wang ₁ , Juan Wang ₁

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地聚合物再生骨料混凝土（GPRAC）是用地聚合物代替普通硅酸盐水泥，用再生骨料代替天然骨料的新型绿色材料，具有广阔的应用前景。本文总结了关于 GPRAC 的力学性能、耐久性和微观方面的研究。审查的内容包括抗压强度、弹性模量、弯曲强度、劈裂抗拉强度、抗冻融性、耐磨性、抗硫酸盐腐蚀性和抗氯化物渗透性。研究发现，通过改变固化温度、使用不同的前体材料、添加纤维和纳米粒子以及设置最佳混合比，可以使 GPRAC 发挥更好的作用。他们之中，与单一前体材料相比，协同使用多种前体材料往往表现出更好的性能。此外，使用改性再生骨料，孔隙率和吸水率分别降低了18.97%和25.33%，表观密度与天然骨料相近。目前的结果表明，GPRAC的性能可以满足工程要求。此外，与传统混凝土相比，使用GPRAC可有效减少碳排放、能源损失和环境污染，符合现代社会绿色低碳发展理念。总体而言，GPRAC具有良好的前景和发展空间。本文综述了再生骨料外加剂、养护温度等因素对GPRAC性能的影响，

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Mechanical Properties and Durability of Geopolymer Recycled Aggregate Concrete: A Review.

Geopolymer recycled aggregate concrete (GPRAC) is a new type of green material with broad application prospects by replacing ordinary Portland cement with geopolymer and natural aggregates with recycled aggregates. This paper summarizes the research about the mechanical properties, durability, and microscopic aspects of GPRAC. The reviewed contents include compressive strength, elastic modulus, flexural strength, splitting tensile strength, freeze-thaw resistance, abrasion resistance, sulfate corrosion resistance, and chloride penetration resistance. It is found that GPRAC can be made to work better by changing the curing temperature, using different precursor materials, adding fibers and nanoparticles, and setting optimal mix ratios. Among them, using multiple precursor materials in synergy tended to show better performance compared to a single precursor material. In addition, using modified recycled aggregates, the porosity and water absorption decreased by 18.97% and 25.33%, respectively, and the apparent density was similar to that of natural aggregates. The current results show that the performance of GPRAC can meet engineering requirements. In addition, compared with traditional concrete, the use of GPRAC can effectively reduce carbon emissions, energy loss, and environmental pollution, which is in line with the concept of green and low-carbon development in modern society. In general, GPRAC has good prospects and development space. This paper reviews the effects of factors such as recycled aggregate admixture and curing temperature on the performance of GPRAC, which helps to optimize the ratio design and curing conditions, as well as provide guidance for the application of recycled aggregate in geopolymer concrete, and also supply theoretical support for the subsequent application of GPRAC in practical engineering.

更新日期：2023-01-25

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