Scaling Resistance of Concretes Made with Fly Ash Cement

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

土木建筑工程;文学

Molendowska, Agnieszka^1

Kielce University of Technology, Al. Tysiãclecia Pastwa Polskiego 7, Kielce

25-314, Poland^1

关键词: Air entraining admixtures;    Air-entrained concrete;    Deicing salts;    Fly ash cements;    Polymer microspheres;    Scaling resistance;    Surface scaling;    Water binder ratio;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/471/3/032024/pdf
DOI  :  10.1088/1757-899X/471/3/032024

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The paper presents test results of 11 series of concretes with three various levels of the water-binder ratio = 0.35, 0.40, 0.45, made with the CEM II/B-V cement. The aim of the testing was to determine the impact of the water-binder ratio and air-entrainment on the freezing and de-icing salt resistance of concrete made with fly ash cement. The tests were conducted on samples of non-air-entrained and air-entrained concretes using an air-entraining admixture and polymer microspheres. Regardless of the water-binder ratio (from 0.35 to 0.45), the samples of non-air-entrained concretes demonstrated no surface scaling resistance in the presence of 3% NaCl. The tests of air-entrained concretes demonstrated that concrete air-entrainment using polymer microspheres and an air-entraining admixture protect the concrete made with fly ash cement from surface scaling. The concrete air-entrainment using an air-entraining admixture causes a substantially higher drop in compressive strength than using polymer microspheres.