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李光辉¹   ,   宋    鸽²

( 1 .  河南交通投资集团有限公司 ，河南 郑州 450016 ;

2. 河南省交通科学技术研究院有限公司 ，河南 郑州 450006)

摘   要：通过试验，研究了硅烷基聚合物防水粉末掺量对早强砂浆的流动性能 、抗压强度 、抗折强度、吸水性能及抗氯离子渗透性能的影响规律 。早强砂浆是由普通硅酸盐水泥 、硫铝酸盐水泥和石膏为胶凝材料制备而成，硅烷基聚合物防水粉末是由 γ- 氨丙基三乙氧基硅烷 、聚乙烯醇和异丁基三乙氧基硅烷为主要原料制成。试验结果表明 ：硅烷基聚合物防水粉末掺量 3 . 0%以内时 ，早强砂浆流动度和经时流动度损失符合规范要求；掺 量为 3 . 0%时，28 d 龄期的早强砂浆试件吸水率最大降低 58. 9% ,  抗压强度和抗折强度未降低，抗氯离子渗透性能提高 44. 6% 。

关键词 ：早强砂浆 ；硅烷基聚合物防水粉末 ；抗压强度 ；吸水率 ；抗氯离子渗透性能

中图分类号 ：U444           

文献标志码 ：A            

文章编号 ：1005- 8249  (2023)   04- 0069- 06

 DOI : 10. 19860/j . cnki . issn1005- 8249. 2023 . 04. 012

LI Guanghui ¹  ,   SONG Ge²

( 1 . Henan Transport Investment Group Co. ，Ltd. ，Zhengzhou 450016 ,   China;   2. Henan Transportation Research Institute Co. ，Ltd. ，Zhengzhou 450006 ,   China)

Abstract: The effect of silane-based polymer powder content on the flow properties, compressive strength, flexural strength, water absorption and chloride ion resistance of early-strength mortar were studied through experiments. Early-strength mortar was prepared from ordinary Portland cement, sulfoaluminate cement and gypsum as binding materials. The main raw materials of the silane-based polymer powder were γ-aminopropyltriethoxysilane, polyvinyl alcohol and isobutyltriethoxysilane. The results showed that when the content of silane-based polymer powder was within 3.0%, the fluidity and loss of fluidity of early-strength mortar met the requirements of the specification. When the dosage was 3.0%, the water absorption rate of the 28d-aged early-strength mortar specimens decreased by 58.9%, the compressive strength and flexural strength were not reduced, and the resistance to chloride ion penetration increased by 44.6%.

Keywords: early-strength mortar; silane-based polymer powder; compressive strength; water absorption;  resistance to chlorideion resistance

作者简介 ：李光辉  ( 1981 —) ,   男 ， 高级工程师 ，博士 ， 主要从事新型建筑材料在公路工程中应用技术研究。

收稿日期 ：2022- 05-26