粉煤灰与减水剂相容性对自密实混凝土性能影响试验研究  

Experimental study of the influence of compatibility between fly ash and water reducing agent on the performance of self-compacting concrete

作　　者：刘家明 LIU Jiaming

机构地区：[1]福州市华源混凝土有限责任公司,福建福州350015

出　　处：《福建建设科技》2023年第2期70-73,共4页Fujian Construction Science & Technology

摘　　要：本文通过对聚羧酸系和萘系两种减水剂和二级粉煤灰的三个掺量进行复配试验,综合分析了粉煤灰与减水剂相容性及其对自密实混凝土工作性和强度等性能的影响规律。结果表明,粉煤灰与聚羧酸系减水剂的相容性较萘系减水剂好,粉煤灰与外加剂的掺入对自密实混凝土的工作性具有明显的改善作用,但对早期强度影响不利。In this paper,two kinds of polycarboxylic acid series and naphthalene series of water-reducing agent and three mixtures of secondary fly ash were tested.The compatibility of fly ash and water-reducing agent and its influence on the workability and strength of self-compacting concrete were analyzed comprehensively.The results show that the compatibility between fly ash and polycarboxylic acid superplasticizer is better than that of naphthalene superplasticizer.The addition of fly ash and admixture can obviously improve the workability of self-compacting concrete,but it has adverse effect on the early strength.

关 键 词：粉煤灰 减水剂 自密实混凝土 工作性 强度 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]