There is provided a functional layer including a layered double hydroxide. The layered double hydroxide does not undergo a change in the surface microstructure and the crystalline structure when immersed in 5 mol/L of an aqueous potassium hydroxide solution containing zinc oxide in a concentration of 0.4 mol/L at 70 C. for three weeks.

There is provided a functional layer including a layered double hydroxide that contains Ni, Al, Ti and Zn, and has an atomic ratio Zn/(Ni+Ti+Al+Zn) of 0.04 or more determined by an energy dispersive X-ray analysis (EDS).

There is provided a functional layer including a layered double hydroxide that contains Ni, Al, Ti and Zn, and has an atomic ratio Zn/(Ni+Ti+Al+Zn) of 0.04 or more determined by an energy dispersive X-ray analysis (EDS).

There is provided a functional layer including a layered double hydroxide (LDH). The functional layer includes a first layer with a thickness of 0.10 m or more, the first layer being composed of fine LDH particles having a diameter of less than 0.05 m, and a second layer composed of large LDH particles having a mean particle diameter of 0.05 m or more, the second layer being an outermost layer provided on the first layer.

There is provided a functional layer including a layered double hydroxide (LDH). The functional layer includes a first layer with a thickness of 0.10 m or more, the first layer being composed of fine LDH particles having a diameter of less than 0.05 m, and a second layer composed of large LDH particles having a mean particle diameter of 0.05 m or more, the second layer being an outermost layer provided on the first layer.

There is provided a functional layer including layered double hydroxide. The functional has an average porosity of 1 to 40% and an average pore diameter of 100 nm or less.

There is provided a functional layer including layered double hydroxide. The functional has an average porosity of 1 to 40% and an average pore diameter of 100 nm or less.

A fast-curing mineral binder mixture includes a titanium(IV)-based accelerator, a cement which includes at least one component which is selected from the compounds 3CaO*Al.sub.2O.sub.3, 12CaO*7Al.sub.2O.sub.3, CaO*Al.sub.2O.sub.3, CaO*2Al.sub.2O.sub.3, CaO*6Al.sub.2O.sub.3 and 4CaO*3Al.sub.2O.sub.3*SO.sub.3, and 15 to 80 wt % of a sulfate carrier, wherein the wt % is based on a weight of the fast-curing mineral binder mixture. The fast-curing mineral binder mixture can optionally include at least one alkaline component and/or at least one additive.

A fast-curing mineral binder mixture includes a titanium(IV)-based accelerator, a cement which includes at least one component which is selected from the compounds 3CaO*Al.sub.2O.sub.3, 12CaO*7Al.sub.2O.sub.3, CaO*Al.sub.2O.sub.3, CaO*2Al.sub.2O.sub.3, CaO*6Al.sub.2O.sub.3 and 4CaO*3Al.sub.2O.sub.3*SO.sub.3, and 15 to 80 wt % of a sulfate carrier, wherein the wt % is based on a weight of the fast-curing mineral binder mixture. The fast-curing mineral binder mixture can optionally include at least one alkaline component and/or at least one additive.

Disclosed is to a calcium aluminate cement, including a calcium aluminate with a first crystallised mineralogical phase of calcium dialuminate CA2 including one calcium oxide CaO for two aluminium oxides Al.sub.2O.sub.3 and/or a second crystallised mineralogical phase of dicalcium alumina silicate C2AS including two calcium oxides CaO for one aluminium oxide Al.sub.2O.sub.3 and one silicon dioxide SiO.sub.2. The mass fraction of all of the first and second mineralogical phases in the calcium aluminate is greater than or equal to 80%.