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混凝土与制品
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湿法棒磨机制砂的特性及其在混凝土中的应用

作者：陈晋栋1，祝雯1，黄奕斌2

关键字：湿法,棒磨,机制,砂,的,特性,及其,在,混凝土,

　
（1.广州建设工程质量安全检测中心有限公司，广东 广州  510440；
2.广州大学 土木工程学院，广东 广州  510006）
    摘要：在对比分析湿法棒磨机制砂、天然砂及干法机制砂特性的基础上，研究湿法砂混凝土与天然砂混凝土、干法砂混凝土在工作性能、力学性能及抗氯离子渗透性能方面的差异。结果表明：在配合比和坍落度相近条件下，湿法砂混凝土的力学性能和干法砂混凝土相近，28 d抗压强度高于天然砂混凝土，但其工作性能和抗氯离子渗透性能较干法砂混凝土和天然砂混凝土差，可通过适当降低水胶比、增加胶凝材料和减水剂掺量的方式改善湿法砂混凝土的性能。
    关键词：湿法棒磨机制砂；颗粒分布；颗粒形貌；抗氯离子渗透性能
    中图分类号：TU528.041        文献标识码：A        文章编号：1001-702X（2021）01-0030-05
 
The characteristics of wet rod grinding manufactured sand and its application in concrete
CHEN Jindong1，ZHU Wen1，HUANG Yibin2
（1.Guangzhou Testing Centre of Construction Quality & Safety Co. Ltd.，Guangzhou 510440，China；
2.College of Civil Engineering，Guangzhou University，Guangzhou 510006，China）
    Abstract：Based on a comparative analysis of the characteristics of wet-rod grinding manufactured sand，natural sand and dry-process sand，the differences among wet-process sand concrete，natural sand concrete and dry-process sand concrete in workability，mechanical performance and chloride ion penetration resistance were studied. The results show that under similar conditions of mix proportion and slump，the mechanical property of wet-processed sand concrete is similar to that of dry-processed sand concrete，and the compressive strength at 28 days is higher than that of natural sand concrete，but its workability and chloride ion penetration resistance are worse than those of dry sand concrete and natural sand concrete. However，the performance of wet-process sand concrete can be improved by appropriately reducing the water-binder ratio and increasing the amount of cementitious material and the content of superplasticizer.
    Key words：wet-rod grinding manufactured sand，particle distribution，particle morphology，chloride ion penetration resistance