The Effect of Mixing Technique and Prolonged Mixing Time on Strength Characteristics of Concrete

Proceedings

Urban, Karol¹  Sicakova, Alena² 

[1] Institute of Construction Technology and Management, Faculty of Civil Engineering, Technical University of Kosice, 04200 KoÅ¡ice, Slovakia;Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, 04200 KoÅ¡ice, Slovakia

关键词: concrete;    triple mixing;    recycled concrete aggregate;    mixing time;    compressive strength;    tensile splitting strength;   

DOI  :  10.3390/proceedings2201290

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

The experiment aims to test the triple mixing (3M) technique to produce the concrete with recycled concrete aggregate (RCA). Then, the impact prolonged mixing, representing the influence of delivery and discharge time in praxis, is analysed by the change in strength properties. Both the 28-day compressive strength and tensile splitting strength are evaluated in two aspects: the prolonged mixing time (0, 45 and 90 min after initial mixing), and the mixing method (normal and triple). Prolonged mixing time brought both the positive and negative changes in strength characteristics however the worst difference between initial mixing (0′) and 90′ minutes of mixing was only 8.4% for compressive strength and 8.5% for tensile splitting strength.

【 授权许可】

CC BY