Rock Wool Waste as Supplementary Cementitious Material for Portland Cement-Based Composites

被引:9
|
作者
Silva, K. D. C. [1 ]
Silva, G. C.
Natalli, J. F. [2 ]
Mendes, J. C. [3 ]
Silva, G. J. B. [4 ]
Peixoto, R. A. F. [5 ,6 ]
机构
[1] Fed Univ Ouro Preto UFOP, Civil Engn, Ouro Preto, Brazil
[2] Univ Fed Ouro Preto, Civil Engn, Ouro Preto, Brazil
[3] Univ Fed Ouro Preto, Postgrad Programme Civil Engn, Ouro Preto, Brazil
[4] Univ Fed Ouro Preto, Civil Engn Mat, Ouro Preto, Brazil
[5] Univ Fed Ouro Preto, Civil Construct, Ouro Preto, Brazil
[6] Lab Mat Construct, Ouro Preto, Brazil
关键词
microfibers; Rietveld; rock wool; supplementary cementitious material; MECHANICAL-PROPERTIES; POZZOLANIC ACTIVITY; FLY-ASH; HYDRATION; METAKAOLIN; RESISTANCE; EFFICIENCY; STRENGTH; CONCRETE; BEHAVIOR;
D O I
10.14359/51701100
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Rock wool is an insulating material applied worldwide, but it gradually loses its properties and is then deposited in landfills, creating an environmental issue. Therefore, this work evaluates the use of rock wool waste (RWW) as a supplementary cementing material (SCM). Initially, RWW was physically, chemically, and mineralogically characterized. Then, the cementitious capacity of RWW was investigated in portland-cement mortars using direct methods such as quantitative X-ray diffraction based on Rietveld's Method and simultaneous thermal analysis (TG/DSC), and indirect methods such as compressive strength index with portland cement and compressive strength index with lime. Furthermore, a morphological analysis by scanning electronic microscope (SEM) was applied in a cement mortar with RWW to evaluate the mechanical role of the particles. The results indicate that RWW promotes pozzolanic reaction and at same time works as crack arrester, encouraging its application as both a versatile and sustainable supplementary cementitious material.
引用
收藏
页码:653 / 661
页数:9
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