Influence of Curing Conditions on Long-Term Compressive Strength of Mortars with Accelerating Admixtures

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Pizo, Jan^1 ; laniewska-Piekarczyk, Beata^1

Silesian University of Technology, Akademicka 5 str., Gliwice

44-100, Poland^1

关键词: Accelerating admixtures;    Blended cement;    Cement type;    Compression strength;    Compressive strength of concrete;    Concrete elements;    Curing condition;    Ground granulated blast-furnace slag (GGBFS);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/3/032093/pdf
DOI  :  10.1088/1757-899X/245/3/032093

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

One of disadvantages of accelerating admixtures usage is possibility of significant decline of long-term compressive strength of concrete in comparison to non-modified one. Described tests were intended to define scale of lowered long-term compressive strength of mortars caused by accelerating admixtures in different curing conditions. Portland cement and blended cement with ground granulated blast furnace slag (GGBFS) addition and four types of non-chloride accelerating agents were used. Compressive strength was tested after 7 up to 360 days. Curing conditions were designed to simulate probable conditions close to reality. Such conditions are simulation of internal concrete elements, external elements cast on start of summer and external elements cast on start of winter. Results had shown that it is invalid to state that every accelerating admixture will cause drop of long-term compressive strength in every conditions and for every cement type. Change of curing conditions even after a long time (in this case half of the year) leads to significant differences in compression strength.