A Review on Mineral Waste for Chemical-activated Binders: Mineralogical and Chemical Characteristics

This review discusses the potential of alkali-activated materials obtained from mineral waste. A brief historical background on alkali-activated materials is presented. Recent advances in the develop-ment of binders obtained from mineral wastes and alkali-activated solutions are described. The scope of this state of the art review is to identify current knowledge in support that mineral waste can be used for the production of alkali-activated binders. In addition, this review identifies the chemical activators that can be effectively utilized for such purposes in the age when wastes are still viewed by industry as dis-posable. Some mineral wastes which are discussed can be viewed as a new resource for recycling and recovery which will offer important economic and social benefits.European Commission under Horizon 2020, Marie Skłodowska-Curie Actions, Research and Innovation Staff Exchange (RISE), by REMINE – “Reuse of Mining Waste into Innovative Geopolymeric-based Structural Panels, Precast, Ready Mixes and Insitu Applications”, Portuguese national funds through FCT - Foundation for Science and Technology, IP, within the research unit C-MADE, Centre of Materials and Building Technologies (CIVE-Central covilhã-4082), University of Beira Interior, Portugal

Increase in Ocular Syphilis Cases at Ophthalmologic Reference Center, France, 2012–2015

We describe the frequency, demographic and clinical features, and visual outcomes of ocular syphilis infections observed during 2012–2015 at a tertiary reference center in Paris, France. Twenty-one cases (29 eyes) were identified. The occurrence of ocular syphilis increased from 1 case in 2012 to 5 cases in 2013, 6 cases in 2014, and 9 cases in 2015 (2.22–25.21/1,000 individual patients/year for the period). Among case-patients, an annual 20%–33% were co-infected with HIV. Seventy-six percent of ocular syphilis infections occurred in men who have sex with men. Seventy-five percent of case-patients had a good final visual outcome (best-corrected visual acuity >0.3 logMAR score). Visual outcome was worse for HIV-positive patients than for HIV-negative patients (p = 0.0139). At follow-up, the best visual outcomes were observed in patients whose mean time from first ocular symptom to consultation was 15 days (SD +19 days)

Cours gradué de lettres arabes manuscrites

Première partie: lettres & rapports d'ordre privé, judiciaire, administratif et politique, d'Algérie, de Tunisie, du Maroc et de Syrie -- Deuxième partie: lettres d'examens primes de 1re et de 2e classe, interprètes militaires, brevets d'arabe et de kabyl

Treatment of paint wastewater by coagulation process

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Low Liquid-to-solid Ratio of Mining Waste and Slag Binary Alkali-activated Material

This study investigates the effect of the increasingly compressing pressures on the properties of the low liquid-to-solid (L/S) ratio binary alkali-activated binder to use as a binder for the manufacturing of engineered stones. The binders were a combination of two types of wastes (aluminosilicate source) as precursors (TMWM 50 Vt.% + EAF-Slag 50 Vt.%), blended with (11.11 wt.%) alkaline activator solution (NaOH/Na2SiO3 with weight ratio 4/1). The mixtures were molded in cube and exposed to five different pressures (20, 40, 60, 80 and 100 MPa) in order to obtain a compressed alkali-activated binder. The main evaluation techniques in this study were compressive strength, and Fourier Transform Infrared Spectroscopy (FTIR). The results showed that the maximum compressive strength (50.57 MPa) was obtained at a pressing pressure 100 MPa at twenty-eight days of testing

Experimental Analysis of a Magnetostrictive Sensor

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