ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
Abstract
Red mud presents significant environmental problems, so that its incorporation in geopolymers could represent an alternative solution to produce valuable products from this residue. Novel geopolymers using red mud as source of alumina and waste glass as silica supplier were developed, using sodium hydroxide as the only ‘non-waste’ material. The formation of a homogeneous polymeric gel, confirmed by solid-state NMR and EDX analysis, promoted the stabilization of possible pollutants. Moreover, the materials exhibit a remarkable compressive strength (up to 45 MPa, for 60 wt% red mud).
4. Conclusions
We may conclude that:
Red mud and soda-lime glass cullet are suitable raw materials for geopolymer production.
Compressive strength values comparable to Portland cement, close to 45 MPa, were achieved for samples produced with 6M solution.
MAS-NMR and EDX techniques confirmed the formation of geopolimeric gel with Si/Al and Al/Na molar ratios close to 2 and 1, respectively.
The leaching of heavy metals agreed with values found in literature, despite the relatively high amount of red mud in the formulation.