Parameters of mortars supplemented with chalcedonite powder

International Conference on the Sustainable Energy and Environmental Development

生态环境科学

Kotwa, A.^1 ; Spychal, E.^1

Kielce University of Technology, Faculty of Civil Engineering and Architecture, Kielce, Poland^1

关键词: Curing periods;    Laboratory test;    Mass increase;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/214/1/012127/pdf
DOI  :  10.1088/1755-1315/214/1/012127

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Laboratory tests were conducted of mortars supplemented with 0%, 5%, 20%, 35%, 50% of chalcedonite powder. Chalcedonite powder replaced the percentage amount of cement. The subject of tests was impact of admixture on properties of hardened mortars including: compressive strength, bending strength, water absorption and capillary rising. Tests of compressive strength were conducted following 2, 7, 14, 28, 56 and 90 days, whereas water absorption, capillary rising were tested following 28 days. The mortar demonstrated the biggest compressive strength where cement was replaced with admixture in 5% and following curing period of 90 days it was 72.1MPa. Mortars where cement was replaced in 5%, 20%, 35% and 50% demonstrated decrease of bending strength comparing to the reference mortar. During the test regarding water absorption, 50% admixture of powder resulted mass increase by 6.1 % in relation to the reference mortar, whereas 20% admixture of chalcedonite powder resulted in mass increase by 3.9% in relation to the reference mortar. Water absorption resulted from capillary rising during tests was below 3.5%.