市政技术2024，Vol.42Issue(12)：101-108,136,9.DOI:10.19922/j.1009-7767.2024.12.101
温度匹配养护对大掺量粉煤灰混凝土强度的影响
Effect of Temperature-matched Maintenance on Strength of Concrete with High-volume Fly Ash
宋博涵 1田景松 1王雷 1王宇欣 1章鹏1
作者信息
- 1. 北京市高强混凝土有限责任公司,北京 101102
- 折叠
摘要
Abstract
Temperature matching maintenance is a synchronous curing method for mass concrete,which aims to match the curing temperature of the specimen with the temperature history inside the concrete structure,so as to more truly reflect the strength of the concrete structure.Through the mortar strength test under variable temperature,it is proved that the temperature has significant effect on the strength of cement mortar mixed with fly ash.The stan-dard curing strength test and adiabatic temperature rise test of concrete with large amount of fly ash show that adding 40％～60％fly ash can significantly reduce the adiabatic temperature rise of concrete,and its strength can also meet the construction requirements of mass concrete.Through the test of concrete members,the critical thickness of 50％fly ash concrete members is determined 0.45 m;In the low temperature environment,the thickness should be in-creased to 0.80 m.At the same time,concrete with adiabatic temperature rise and thermal insulation measures should be added.By the engineering case,that the temperature matching curing strength of high volume fly ash con-crete exceeds the standard curing strength in the same period,showing good early strength performance,which pro-vides guidance for the application of high volume fly ash concrete.关键词
温度应力/大掺量粉煤灰/温度匹配养护/截面临界尺寸/早期强度Key words
temperature stress/high-volume fly ash/temperature-matched maintenance/critical size of section/early strength分类
建筑与水利引用本文复制引用
宋博涵,田景松,王雷,王宇欣,章鹏..温度匹配养护对大掺量粉煤灰混凝土强度的影响[J].市政技术,2024,42(12):101-108,136,9.
