Experimental Study on the Use of Granite as Fine Aggregate in Very-High-Strength Concrete

3rd World Multidisciplinary Civil Engineering, Architecture, Urban Planning Symposium

土木建筑工程;文学

Szczesniak, Anna^1 ; Siwinski, Jaroslaw^1 ; Stolarski, Adam^1

Faculty of Civil Engineering and Geodesy, Military University of Technology, 2 Gen. W. Urbanowicza Street, Warsaw

00-908, Poland^1

关键词: Comparative analysis;    Compressive and flexural strengths;    Compressive strength of concrete;    Fine aggregates;    Hardened concrete;    High strength concretes;    Laboratory test;    Normal condition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/3/032054/pdf
DOI  :  10.1088/1757-899X/471/3/032054

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The aim of the study is to assess the usefulness of using granite aggregate to make very-high-strength concrete. The paper presents a comparative analysis of the results that are obtained for three types of concrete mixtures. The main components of the analysed concretes are sand or granite aggregates and cement CEM I 52,5 with the addition of microsilica and fly ash. The first, basic concrete mixture is made using sand as aggregate. The main assumption for the basic concrete mixture is to obtain a compressive strength of not lower than 100 MPa in normal conditions of curing in water. Furthermore, using the aggregate fractions up to 2 mm and the semi-liquid consistency (i.e. ≥S3) of the concrete mixture are assumed. The second concrete mixture contains granite aggregate added in the same proportion as sand in the basic mixture. While in the third concrete mixture, the granite aggregate is used taking into account density factor. Laboratory tests are carried out in range of compressive and flexural strength of concrete. Furthermore, the investigations of the consistency of concrete mixtures and the water absorption by the hardened concrete are presented in the paper. Comparative analysis of the obtained results indicates that the exchange of sand to granite aggregate improves the compressive and flexural strength of concrete. Compressive strength of concrete based on granite aggregate is 10% higher than that of concrete based on sand. The test results indicate that both concrete made of sand and concrete made of granite aggregate can be qualified as very-high-strength.