Studies for understanding effects of additions on the strength of cement concrete

FIBRE CONCRETE 2017

Bucur, R.D.^1 ; Barbuta, M.^2 ; Konvalina, P.^3 ; Serbanoiu, A.A.^2 ; Bernas, J.^3

University of Agricultural Sciences and Veterinary Medicine in Iasi, Mihail Sadoveanu, 3, Iasi

700490, Romania^1

Gheorghe Asachi Technical University of Iasi, Faculty of Civil Engineering and Services, 45 Mangeron Blvd., Iasi

700050, Romania^2

University of South Bohemia in eskéBudjovice, Czech Republic^3

关键词: Cement concrete;    Concrete grades;    Crushed aggregates;    Experimental values;    Metallic fibers;    Natural aggregate;    Water/cement ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/246/1/012036/pdf
DOI  :  10.1088/1757-899X/246/1/012036

来源: IOP

【 摘 要 】

The paper analyzes the effects of different types of additions introduced in concrete mix on the compressive strength. The current studies show that additions contribute to improve some characteristics of concrete and to reduce the cement dosage, so it can obtain concretes which are cheaper and friendlier with environment. In the experimental mixes were introduced: crushed natural aggregates, slag aggregates, silica fume, fly ash, chopped tire, polystyrene granule, glass fibers and metallic fibers. The experimental values of compressive strengths were compared for two concrete grades (C20/25 and C25/30). The study shown that near the well-known possibilities of improving mechanical strengths of cement concrete by increasing cement dosage and strength, by using crushed aggregates and by reducing the water/cement ratio, there are other methods in which less cement is used by replacing it with different wastes or by adding fiber.