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Experimental Research on Mechanical Properties of Recycled Concrete Immersed in Chloride Solution
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摘要: 对不同浸泡龄期下的混凝土(C)、再生混凝土(RC)、钢纤维再生混凝土(SFRC)、金刚砂再生混凝土(SiCRC)等试件分别进行了立方体抗压、劈裂抗拉试验研究。将4类混凝土制成的标准立方体试块浸泡在质量分数为5%的NaCl溶液中,浸泡时间分别均为0,30,60,90 d;之后完成试验,并将得到的RC、SFRC、SiCRC等再生混凝土的力学性能与普通混凝土进行比较,通过对试验数据进行拟合,分别得到了不同类型混凝土的抗压、劈裂抗拉强度随龄期变化的关系式,并分析了不同龄期氯盐浸泡对各类再生混凝土的影响机理。结果表明:C、RC、SiCRC等混凝土的抗压、劈裂抗拉强度均随着氯盐浸泡龄期的增长而增长,而SFRC混凝土的强度性能则相反;氯盐浸泡后的SFRC试件颜色加深,且表面出现锈蚀现象,其他类型混凝土试件均无明显变化,表明SiCRC、RC和C较SFRC更适用于氯盐环境。Abstract: The specimens of concrete (C), recycled concrete (RC), steel fiber reinforced recycled concrete (SFRC) and silicon carbide recycled concrete (SiCRC) at different soaking ages were studied by compression test and splitting tensile test. Four types of standard concrete cube test blocks were immersed in a NaCl solution with a mass fraction of 5%. Soaking time was 0 d, 30 d, 60 d and 90 d, then finished the test. The mechanical properties of recycled concrete such as RC、SFRC、SiCRC were compared with ordinary concrete, the relations between the compressive strength and splitting tensile strength of different types of concrete with age were obtained by fitting the test data, and the influence mechanism of chloride salt immersion at different ages on recycled concrete was analyzed.The results showed that the compressive strength and splitting tensile strength of C,RC,SiCRC and other concrete increased with the increase of chlorine salt immersion age, while the strength performance of SFRC concrete was opposite. The color of SFRC specimens after being subjected to chlorine salt immersion was deepened and the surface was corroded. There was no obvious change in other types of concrete specimens, which indicated that SiCRC、RC and C were more suitable for chlorine salt environment than SFRC.
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Key words:
- recycled concrete /
- steel fiber /
- silicon carbide /
- different soaking age /
- experimental study /
- nonlinear fitting
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[1] 肖建庄,夏冰,肖绪文.工程结构可持续性设计理论架构[J].土木工程学报,2020,53(6):1-12. [2] 肖建庄,张凯建,曹万林,等.考虑时变可靠度的再生混凝土结构设计[J].建筑结构学报,2020,41(12):17-27. [3] NIXON P J. Recycled concrete as an aggregate for concrete: a review [J]. Materials and Structures, 1978,11(6):371-378. [4] GUPTA S M.Strength characteristics of concrete made with demolition waste as coarse aggregate[C]//Proceedings of the International Conference on Recent Development in Structural Engineering. 2001:364-373. [5] POON C S, KOU S C. Properties of steam cured recycled aggregate concrete[G]//Sustainable Waste Management and Recycling: Construction Demolition Waste. Telford: Thomas Telford Publishing Company, 2004: 1-12. [6] ZAHARIEVA R, BUYLE-BODIN F, SKOCZYLAS F, et al. Assessment of the surface permeation properties of recycled aggregate concrete[J]. Cement and Concrete Composites, 2003, 25(2): 223-232. [7] 李马力,隋莉莉,周英武,等.再生粗骨料混凝土强度预测模型研究[J].防灾减灾工程学报,2016(1):132-137. [8] 潘丽云,梁娜,胡飞佳,等.全再生粗骨料混凝土力学性能试验与评价研究[J].华北水利水电大学学报(自然科学版),2017,38(6):32-42. [9] 王国林,祁尚远,李聚义,等.再生粗骨料混凝土力学性能试验研究[J].混凝土,2020(3):168-171,176. [10] 李琼,冯琼,曹辉.再生骨料级配对混凝土力学性能的影响及微观机理分析[J].江苏大学学报(自然科学版),2019,40(5):614-620. [11] 张浩,蒋华,何勇.钢纤维再生混凝土研究现状与应用前景[J].四川建材,2015,41(1):3-5. [12] 胡文生.钢纤维再生混凝土抗拉试验研究[J].建材技术与应用,2013(6):3-5. [13] HUO J, BAI X, JIANG P. Effect of different fiber content on mechanical properties of recycled concrete [C]//IOP Conference Series: Materials Science and Engineering. Bristol: IOP Publishing Ltd., 2018. [14] 王瑞燕,吴国雄,韩春云.金刚砂混凝土配合比设计及力学性能研究[J].公路, 2004(7): 145-149. [15] 肖建庄,廖清香,张青天,等.海水海砂再生混凝土与玻璃纤维增强塑料筋黏结性能[J].同济大学学报(自然科学版),2018,46(7):884-890,971. [16] 李隽,高培伟,刘宏伟,等.混凝土在浸泡和干湿循环作用下的抗氯盐侵蚀性能[J]. 南京理工大学学报, 2017, 41(5):666-670. [17] 朱思远,耿欧,王腾,等.废轮胎再生混凝土抗氯离子侵蚀试验研究[J].混凝土,2021(2):53-58. [18] 张金山,姚燕,王昕,等.不同氯盐溶液中钙矾石与氯离子结合的研究[J].建筑材料学报,2022,25(3):314-319. [19] 王旭,曾力,高浩.掺合料对混凝土抗氯盐侵蚀性能研究[J].水电与新能源,2019,33(1):17-21. [20] 肖建庄,应敬伟.模型再生混凝土二维Cl-扩散细观数值模拟[J].同济大学学报(自然科学版),2012,40(7):1051-1057. [21] 蔡希高.氢键在水泥水化中的作用[J].广西土木建筑,1996(4):171-177. 期刊类型引用(6)
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