Process for the preparation of sulphur cement or a sulphur cement-aggregate composite

A process for the preparation of sulphur concrete, wherein the process comprises the following steps:

• (a) admixing at least an inorganic filler and/or aggregate and a polysulphide-containing organosilane that is bis(3-triethoxysilylpropyl)tetrasulphide and allowing the polysulphide-containing organosilane to react with the inorganic filler and/or aggregate;
• (b) admixing during or after step (a) elemental sulphur with the inorganic filler and/or aggregate at a temperature at which sulphur is liquid to obtain an admixture comprising molten sulphur and inorganic filler and/or aggregate;
• and
• (c) solidifying the admixture to obtain the sulphur concrete.

A process comprising:

• (a) admixing an inorganic ingredient with an organosilane that is bis(3-triethoxysilylpropyl)tetrasulphide, (TESPT) under conditions such that said organosilane is allowed to react with said inorganic ingredient to thereby form a first admixture;
• (b) admixing elemental sulphur with said first admixture at a first temperature at which sulphur is liquid to obtain a second admixture comprising molten sulphur and said inorganic ingredient;
• and
• (c) solidifying said second admixture by cooling said second admixture to a second temperature below the melting temperature of sulphur.