摘要
采用活性TH粉进行自密实混凝土配合比设计,成功配制出C50自密实钢管混凝土。探讨了活性TH粉对混凝土工作性能的影响,研究了掺TH粉后混凝土强度和收缩性能的变化规律。结果表明,TH粉具有比Ⅰ级粉煤灰更高的活性、形态效应和微集料效应,能降低拌合物粘度、改善混凝土工作性能、提高后期强度和减小体积收缩,28d收缩率可降至1.5×10-6,是配制高强泵送自密实混凝土的优质掺合料。经过现场成功中试,在武汉中央文化区秀场和六星级酒店项目中得到了较好应用。
The C50 self-compacting steel tube concrete is prepared successfully with active TH powder developed together with other groups. The influence of TH powder on the workability of concrete is discussed, and the regulars of compressive strength and shrinkage are studied. The results show that the TH powder has better active, water reduction and micro-aggregated effect rather than the grade Ifly ash, furthermore, it is beneficial to reduce mixture viscosity, im-prove the workability, increase later strength and decrease the 28 days shrinkage ratio to 1.5＆#215;10-6. Meanwhile, it is the quality mineral admixture for preparing high-strength pumping self-compacting concrete. The preparation technology is applied for Wuhan central culture district and the six-star hotel project after successful pilot testing.
出处
《混凝土与水泥制品》
北大核心
2014年第2期17-19,22,共4页
China Concrete and Cement Products
关键词
自密实混凝土
活性TH粉
抗压强度
工作性能
收缩
Self-compacting concrete
Active TH powder
Compressive strength
Workability
Shrinkage
