Unshaped product for repairing glass melting furnaces

A wet mixture consisting of:

• an unshaped product comprising, as percentages by weight and for a total of 100%,
• A) a set of particles (a) of at least one refractory material other than a glass and a glass-ceramic, and the main constituent(s) of which are alumina (Al2O3) and/or zirconia (ZrO2) and/or silica (SiO2) and/or chromium oxide (Cr2O3),
• B) a set of particles (b) of a hot binder chosen from glass-ceramic particles, particles made of a glass and the mixtures of these particles:
• 2% to 15%, said glass being a noncrystalline material exhibiting a glass transition temperature of less than 800° C., the hot binder not being in the solid state at 1500° C.,
• C) a set of particles (c) of hydraulic cement:
• less than 2%,
• D) less than 7% of constituents other than particles (a), (b), and (c), said particles (a) and (b) being distributed, as percentages by weight with respect to the weight of the unshaped product, in the following way:
• fraction<0.5 μm:
• ≥1%,
• fraction<2 μm:
• ≥4%,
• fraction<10 μm:
• ≥13%,
• fraction<40 μm:
• 25%-52%,
• the content of the set of particles (a) being the complement, to reach 100%, to the whole content of the particles (b), of the set of particles (c) and of said other constituents, and
• water in an amount of greater than 9%, by weight, with respect to the weight of said unshaped product.