水闸复掺矿物掺和料泵送混凝土的应用
Pumped Concrete with Multiple Mineral Admixtures Used in Sluice Construction
彭建 1曹凯峰 2严建军 3刘荣超2
作者信息
- 1. 安徽省引江济淮集团有限公司,合肥 230092
- 2. 中交第二航务工程局有限公司,武汉 430048
- 3. 长江科学院材料与结构研究所,武汉 430010;水利部水工程安全与病害防治工程技术研究中心,武汉 430010
- 折叠
摘要
水闸工程结构复杂,采用泵送混凝土时胶凝材料用量高,易导致裂缝出现.为了解决此类裂缝问题,结合工程原材料,选用当地粉煤灰和矿渣粉,对水闸泵送混凝土展开了单掺粉煤灰、复掺粉煤灰和矿渣粉及其不同掺量的混凝土性能研究.混凝土拌和物性能、力学性能、变形性能、热学性能、耐久性等试验研究结果表明:混凝土复掺矿渣粉和粉煤灰可以产生复合效应,能够改善混凝土工作性能;复掺20％粉煤灰+20％矿渣粉的混凝土与单掺30％粉煤灰混凝土相比,28 d抗压强度基本持平,混凝土温升降低2.9 ℃,能提高混凝土抗裂性能.采用复掺掺和料混凝土有助于解决引江济淮水闸混凝土的裂缝问题.
Abstract
The intricate structure of sluice coupled with the high dosage of binder materials in pumped concrete can lead to various cracks.We examined the performance of pumped concrete mixed with fly ash,slag powder,or both in various dosages.Experimental tests include concrete mixing,mechanical properties,deformation,thermal char-acteristics,and durability.Findings indicate that mineral admixture combining slag powder and fly ash significantly enhances concrete mix performance.Specifically,concrete incorporating 20％fly ash and 20％slag powder exhibits nearly equivalent strength to concrete with 30％fly ash alone,while reducing the adiabatic temperature rise by 2.9 ℃ and improving crack resistance.This composite admixture could help address the cracking problem for the pumped concrete used in the sluice of the Yangtze River to Huaihe River Diversion Project.
关键词
复掺/粉煤灰/矿渣粉/水闸/泵送混凝土Key words
multiple mineral admixtures/fly ash/slag power/sluice/pumped concrete引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据